MAX3601_V01_技术文档

MAX3601

Laser Driver for Projectors

Benefits and Features

General Description

The MAX3601 laser driver for pico projectors supports

video imaging with red, blue, and green lasers. Each

output includes two 8-bit digital-to-analog converters

(DACs) with programmable gain and up to 400mA

driving capability per channel. DAC A has a full-scale

current up to 320mA, while DAC B has full-scale current

up to 80mA. All three channels can be combined into a

single channel with up to 1.2A drive capability.

S Integrates Three Current-Output Laser Drivers

 Compatible with Most Red, Blue, and Green

Lasers

 8-Bit Video DACs, DC to 167MHz operation

 Patented Pulsing Feature Reduces Laser

Speckling

 1ns Output Switching Time

 Pulse Switching Speed Enhancer

Maxim’s patented technology allows pulsed current to

operate lasers efficiently while reducing speckle. This

feature operates from the video data clock. The driver

is available in a 3.0mm x 3.5mm, 42-bump wafer-level

package for commercial applications and a 5mm x 5mm,

40-pin TQFN package for industrial and automotive

applications.

S Minimizes PCB Area with Functional Integration

 SPI or I²C Serial Port Control

 1.8V to 3.3V Operation

 8-Bit Gain Adjustment

 Programmable Pulse Current

 42-Bump WLP (3.0mm x 3.5mm) and 40-Pin

TQFN (5mm x 5mm) Packages

 Integrated Temperature Sensor

Applications

S Low Power Requirements

 < 80mW for Black Video Images

 Output Disable Using Video Marker

 Output Voltage Sensor

RGB Pico Laser Projector

Laser Light Source for LCOS Projectors

High-Current LED or Laser Pulse Generator

S Laser Enable Function Supports Safety Compliance

Ordering Information appears at end of data sheet.

Simplified Functional Diagram

CS

LASER DRIVER

GAIN SETTINGS

3-WIRE PORT DIO/SDA

SERIAL PORT

(3.3V OR 1.8V CMOS)

CLK/SCL

VIDEO SETTINGS

LASER 1

LASER 2

LASER 3

OUT1

OUT2

OUT3

+V

VIDEO

OUTPUT 1

OUTPUT 2

OUTPUT 3

A1

A2

A3

8

VIDEO

8

VIDEO DATA D[0:11]

(1.8V CMOS)

DEMULTIPLEXER

VIDEO CLOCK DCLK

(1.8V CMOS)

AVDD

DVDD

AVCC

DVCC

AGND

DGND

TESTA

TESTB

TESTC

+1.8V

PIXEL CLOCK

+3.3V

0V

SUBPIXEL GENERATOR

CONTROL LOGIC

PULSE-OFF

TEMP ALARM

MARKER

EN_MAIN

VIDEO MARK ENABLE

(3.3V OR 1.8V CMOS)

EN1..3

For related parts and recommended products to use with this part, refer to: www.maximintegrated.com/MAX3601.related

For pricing, delivery, and ordering information, please contact Maxim Direct at

1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.

19-6444; Rev 3; 3/15

MAX3601

Laser Driver for Projectors

TABLE OF CONTENTS

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Benefits and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Simplified Functional Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Package Thermal Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Typical Operating Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Pin/Bump Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Pin/Bump Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Functional Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Detailed Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Video Demultiplexer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Demux A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Demux B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Demux C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Pulse Timing Generator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Subpixel Programming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Pulse-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Driver Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Video DACs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Pulse-Off and Pulse-off Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Compliance Voltage Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Temperature Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Control Logic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Video Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Laser Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Serial Port and Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

2

I C Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Data Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

START and STOP Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Slave Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

2

I C Communication Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Writing to a Single Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Writing to Sequential Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Maxim Integrated

2

MAX3601

Laser Driver for Projectors

TABLE OF CONTENTS (continued)

Reading from a Single Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Reading from Sequential Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

SPI Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Read/Write Data Using 3-Wire SPI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Power-On-Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Design Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Select Lasers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Supply Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Compensation Network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

PCB Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Laser Driver Thermal Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Applications Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Connecting Multiple Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Eye Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Wafer-Level Packaging (WLP) Applications Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Typical Operating Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Package Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Maxim Integrated

3

MAX3601

Laser Driver for Projectors

LIST OF FIGURES

Figure 1. Test Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 2. Video Test Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 3. DCode Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 4. Power-Supply Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 5. Video Demultiplexer A Input Waveform. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 6. Video Demultiplexer B Input Waveform. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 7. Video C Demultiplexer Input Waveform. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 8. Video C Demultiplexer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 9. Pulse Timing Generator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 10. Driver Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Figure 11. Driver Output Full-Scale Current Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 12. Output Compliance Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 13. Example Use of Compliance Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 14. Temperature Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 15. Video Marker. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

2

Figure 16. I C Master/Slave Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

2

Figure 17. I C Bit Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

2

Figure 18. I C START and STOP Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

2

Figure 19. I C Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

2

Figure 20. I C Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

2

Figure 21. I C Writing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

2

Figure 22. I C Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 23. AVDD, DVDD, and CS Timing for SPI Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 24. SPI Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 25. SPI Write Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 26. SPI Read Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 27. Power-Supply Sequencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 28. Laser and Package Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 29. Optional Compensation Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Maxim Integrated

4

MAX3601

Laser Driver for Projectors

LIST OF TABLES

Table 1. Subpixel Programming (SP Register) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 2. Pulse-Off Duty Cycle (POC_ Register). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 3. Random Pulse-Off Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 4. Video Select Logic for DAC A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table 5. Video Select Logic for DAC B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table 6. Compliance Alarm Setpoint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Table 7. Video Demultiplexer Selection Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 8. Register Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 9. Typical Laser Diode Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Table 10. Detailed Register Table (see Table 8). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Maxim Integrated

5

MAX3601

Laser Driver for Projectors

ABSOLUTE MAXIMUM RATINGS

AVDD to AGND ....................................................-0.3V to +2.2V

DVDD to DGND....................................................-0.3V to +2.2V

AVCC to AGND ....................................................-0.3V to +4.0V

DVCC to DGND....................................................-0.3V to +4.0V

AVDD to DVDD.....................................................-0.3V to +0.3V

AVCC to DVCC.....................................................-0.3V to +0.3V

AGND to DGND ...................................................-0.3V to +0.3V

OUT_ to DGND.....................................................-0.3V to +8.4V

OUT_ Current

D0-D11, DCLK, SCL, SDA,

CS, EN_MAIN, MARKER Current ................ -50mA to +50mA

Continuous Power Dissipation

TQFN (T = +85°C, derate 35.7mW/°C above +85°C)..2320mW

A

WLP (T = +70°C, derate 28.5mW/°C above +70°C)..2200mW

A

Junction Temperature .....................................................+150°C

Operating Temperature Range

TQFN ............................................................ -40°C to +105°C

WLP ................................................................... 0°C to +70°C

Storage Temperature Range............................ -55°C to +150°C

Lead Temperature (soldering, 10s; TQFN only).............+300°C

Soldering Temperature (reflow) ......................................+260°C

Continuous....................................................................400mA

Peak (t < 1Fs)...............................................................800mA

D0-D11, DCLK, TESTC to DGND...... -0.3V to lower of +2.2V or

(V

+ 0.3V)

DVDD

CLK/SCL, DIO/SDA, CS, EN_MAIN, MARKER,

TESTA, TESTB to DGND ................-0.3V to lower of +4.0V or

(V + 0.3V)

DVCC

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-

tion of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute

maximum rating conditions for extended periods may affect device reliability.

PACKAGE THERMAL CHARACTERISTICS (Note 1)

TQFN

WLP

Junction-to-Case Thermal Resistance (B ).................2NC/W

Junction-to-Ambient Thermal Resistance (B ) ..........36NC/W

JC

JA

Junction-to-Ambient Thermal Resistance (B ) ..........28NC/W

JA

Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer

board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.

ELECTRICAL CHARACTERISTICS

(V

= V

= 1.7V to 1.9V, V

= V

= 2.9V to 3.5V, T = T

to T

, T < +125NC, EN_MAIN and MARKER high,

MAX J

AVDD

DVDD

AVCC

DVCC

A

MIN

V

R0.7V, unless otherwise noted. Typical values are at V

= V

= 1.8V, V

= V

= 3.3V, T = +85NC. Consumer

OUT

AVDD

DVDD

AVCC

DVCC J

grade parts are tested at T = +70NC. Automotive grade parts are tested at T = +105NC. Minimum and maximum specifications are

A

guaranteed by design, characterization and/or production test.)(Note 2)

PARAMETER

OPERATING CONDITIONS

Output Voltage

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

V

Output enabled

0.5

0.6

7.5

V

OUT

POWER SUPPLY (Note 3, Figure 4)

I

EN_MAIN low or SP_EN = 1

SP_EN High

0.01

5

(1)

7

FA

AVDD_DIS

I

mA

AVDD

SP_EN = 0

0.02

0.1

(0.03)

(0.2)

I

mA/MHz

DVDD1

SP_EN = 1, f

= 75MHz

PO

+1.8V Supply Current

FA/

(MHz x

DCODE

I

Video dependency DAC A

1.1

0.5

(1.5)

(0.6)

DVDD_G1A

DVDD_G1B

Video dependency DAC B

Maximum digital supply current

I

(45)

mA

DVDD

f

= 150MHz, f

= 75MHz

PIXEL

PO

Maxim Integrated

6

MAX3601

Laser Driver for Projectors

ELECTRICAL CHARACTERISTICS (continued)

(V

= V

= 1.7V to 1.9V, V

= V

= 2.9V to 3.5V, T = T

to T

, T < +125NC, EN_MAIN and MARKER high,

MAX J

AVDD

DVDD

AVCC

DVCC

A

MIN

V

R0.7V, unless otherwise noted. Typical values are at V

= V

= 1.8V, V

= V

= 3.3V, T = +85NC. Consumer

OUT

AVDD

DVDD

AVCC

DVCC J

grade parts are tested at T = +70NC. Automotive grade parts are tested at T = +105NC. Minimum and maximum specifications are

A

guaranteed by design, characterization and/or production test.)(Note 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

1.5

0.01

3.4

8.2

1.2

2.5

MAX

1.8

0.1

4.8

9.1

1.6

2.8

3.3

UNITS

I

Core analog

AVCC

I

ENA_ = ENB_ = 0

DVCC_DIS

I

GA_ = 0x00 (per channel)

GA_ = 0xFF (per channel)

GB_ = 0x00 (per channel)

DVCC_G1A

DVCC_G2A

DVCC_G1B

mA

+3.3V Supply Current

MAX3601C

MAX3601G

I

GB_ = 0xFF (per channel)

DVCC_G2B

Maximum analog supply

current GA_= GB_ = 0xFF,

ENA_ = ENB_ = 1

MAX3601C

MAX3601G

(37.6)

I

AVCC

(39.1)

(10)

I

PHS_= 0

5

CCD_G1

Pulse-Off Assist Current (Note 4)

µA/MHz

mW

f

C

= f

= 0pF, V

= 75MHz, f = 150MHz,

PIXEL

PO

POH

2.3

(4.6)

CCD_G2

= 0.8V to 1.8V

L

OUT_MIN

Outputs off, clock stopped

0% video

0.2

< 83

130

270

150

160

1

(100)

27% video

Power In MAX3601 Driver

(Note 5)

100% video

27% video with pulse-off

27% video with pulse-off assist

I

/V

OUT AVDD

/V

1

(3)

(17)

(6)

Typical Output Sensitivity to

Supply Voltage (Note 6)

OUT DVDD

%/V

/V

2

OUT AVCC

/V

2.2

OUT DVCC

VIDEO DAC (8-Bit, Note 7)

Maximum Conversion Rate

150

160

6.7

12

(250)

(12)

(25)

(34)

(2.5)

24

Msps

ns

Within 12 LSBs (GAIN = 0x0F to 0xFF)

Within 3 LSBs (GAIN = 0xFF)

Within 1 LSB (GAIN = 0xFF)

20% to 80%

Settling Time

t

S

23

Rise/Fall Time

1.5

1.0

10.5

400

ns

0V ≤ V

≤ V

+ 0.5V

Offset Error (GSA_ = GSB+ =

0xFF, ENA_ = ENB_ = 1)

OUT

AVCC

OS_ER

FA

V

= 7.5V

(1.0)

(290)

(-15)

37

OUT

Resistor ROUT1

R

= 7.5V, see Figure 12

(490)

(15)

kI

OUT1

OUT

Video INL (Notes 8 and 9)

Code > 0x1F

LSB

0x1F < GAIN < 0xFF, 0NC < T < +125NC

J

INL Drift (Notes 8 and 9)

1.5

(3)

LSB

V

= 0.6V to 1.6V

OUT_MIN

Maxim Integrated

7

MAX3601

Laser Driver for Projectors

ELECTRICAL CHARACTERISTICS (continued)

(V

= V

= 1.7V to 1.9V, V

= V

= 2.9V to 3.5V, T = T

to T

, T < +125NC, EN_MAIN and MARKER high,

MAX J

AVDD

DVDD

AVCC

DVCC

A

MIN

V

R0.7V, unless otherwise noted. Typical values are at V

= V

= 1.8V, V

= V

= 3.3V, T = +85NC. Consumer

OUT

AVDD

DVDD

AVCC

DVCC J

grade parts are tested at T = +70NC. Automotive grade parts are tested at T = +105NC. Minimum and maximum specifications are

A

guaranteed by design, characterization and/or production test.)(Note 2)

PARAMETER

SYMBOL

CONDITIONS

Guaranteed monotonic

MIN

TYP

MAX

UNITS

Video DNL (GAIN = 0x0F to

0xFF) (Note 8)

(-1)

(+1)

LSB

Pixel

clocks

PD1

PD2

2

Propagation Delay (Delay = PD1

+ PD2)

11

ns

Propagation Delay Variation

(-1)

(+1)

(1)

f < 50kHz, V

> 0.9V

> 0.6V

> 0.5V

0.2

6

OUT

Transfer of V

to I

(Note 5)

OUT

f < 1MHz, V

(10)

(15)

%/V

pF

OUT

12

V

= 0.6V

260

125

100

OUT

Output Capacitance (CODE_A =

CODE_B = 0x00)

C

= 1.1V

= 2.0V

DVR

PULSE OFF ASSIST

20% to 80%, V _ = 1.0V, C = 0pF,

PHS_ = 3, VIDEO = 0x00

A

L

Rise Time

1.6

(3)

ns

PHS_= 3,

PHS_= 2

PHS_= 1

PHS_= 0

8

16

32

64

Incremental Resistance

PH_= 0xFFFF

I

Relative to V

+125°C)

, I

= 1mA (T = 0 to

AVCC OUT A

(-0.8)

(-0.9)

Compliance Voltage

V

O_POH

T

= -40°C to +125°C

A

OUTPUT GAIN (VIDEO_ = 0xFF)

Resolution

8

Bits

GA_= 0x00, GB_= 0x00

MAX3601C

0.01

320

(1)

280

275

400

GA_= 0xFF,

GB_= 0x00

MAX3601G, T = +25°C to

+105°C

A

320

400

MAX3601G, T < +25°C

260

69

320

80

400

100

A

Current at OUT

MAX3601C

mA

GA_= 0x00,

GB_= 0xFF

MAX3601G, T = +25°C to

+105°C

A

68

80

100

MAX3601G, T < +25°C

60

80

100

A

MAX3601C

MAX3601G

(349)

(320)

400

(500)

GA_= 0xFF,

GB_= 0xFF

Maxim Integrated

8

MAX3601

Laser Driver for Projectors

ELECTRICAL CHARACTERISTICS (continued)

(V

= V

= 1.7V to 1.9V, V

= V

= 2.9V to 3.5V, T = T

to T

, T < +125NC, EN_MAIN and MARKER high,

MAX J

AVDD

DVDD

AVCC

DVCC

A

MIN

V

R0.7V, unless otherwise noted. Typical values are at V

= V

= 1.8V, V

= V

= 3.3V, T = +85NC. Consumer

OUT

AVDD

DVDD

AVCC

DVCC J

grade parts are tested at T = +70NC. Automotive grade parts are tested at T = +105NC. Minimum and maximum specifications are

A

guaranteed by design, characterization and/or production test.)(Note 2)

PARAMETER

COMPLIANCE ALARM

VSET DAC Resolution

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

4 bit

(70)

0.32

1.4

80

0.4

1.6

1

(90)

0.48

1.8

mV

V

VSET_ = 0x0

VSET_ = 0xF

VSET DAC Range

Filter 1 Time Constant

Filter 2 Time Constant

TEMPERATURE ALARM

Temperature Range

ns

2.7

(5)

(150)

(10)

°C

Temperature Accuracy

Temperature Resolution

T = +20°C to +125°C

(-10)

(2.25)

J

T = +20°C to +125°C

2.5

(2.75) °C/LSB

J

LOGIC I/O (DIO/SDA, CLK/SCL, CS, MARKER, EN_MAIN)

Input Low Voltage

Input High Voltage

Input High Threshold

Input Low Threshold

Input Hysteresis

V

Test condition

0.4

V

IL2

V

1.45

(50)

(40

(5)

IH2

Relative to V

60

50

(70)

(60)

%

FA

DVDD

Input Current

DIO/SDA, CLK/SCL

EN_MAIN to DGND

MARKER to DVDD

CS to DGND

-10

50

Q0.2

100

1

+10

200

R

EN_MAIN

Input Resistance

R

50

kI

MARKER

R

50

CS

Input Capacitance

pF

Fs

V

Disable Time

t

EN_MAIN or MARKER to I

falling

0.1

0.5

0.1

1

DIS

OUT

Enable Settling Time Constant

DIO/SDA Low Voltage

VIDEO DATA INPUTS

Maximum Frequency

DCLK Duty Cycle

t

EN_MAIN rising or MARKER rising

1.5

0.4

EN

I

= 16mA

DIO/SDA

f

150

(45)

(-0.5)

1

> 160

MHz

%

DCLK_MAX

f

> 100MHz

(55)

DCLK

DCLK High Time

Relative to 2/f

(+0.5)

ns

DCLK

Video Input Setup Time

t

Operating condition

ns

SU

MAX3601C

MAX3601G

0.25

0.35

Video Input Hold Time

Input Switching Time

t

Operating condition

ns

H

10% to 90%, operating condition

1.2

0.5 x

Input Low Voltage

V

IN-L

DVDD

- 0.1

Maxim Integrated

9

MAX3601

Laser Driver for Projectors

ELECTRICAL CHARACTERISTICS (continued)

(V

= V

= 1.7V to 1.9V, V

= V

= 2.9V to 3.5V, T = T

to T

, T < +125NC, EN_MAIN and MARKER high,

MAX J

AVDD

DVDD

AVCC

DVCC

A

MIN

V

R0.7V, unless otherwise noted. Typical values are at V

= V

= 1.8V, V

= V

= 3.3V, T = +85NC. Consumer

OUT

AVDD

DVDD

AVCC

DVCC J

grade parts are tested at T = +70NC. Automotive grade parts are tested at T = +105NC. Minimum and maximum specifications are

A

guaranteed by design, characterization and/or production test.)(Note 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

0.5 x

Input High Voltage

V

IN-H

DVDD

+ 0.1

Input Threshold

Relative to V

50

0.1

<Q1

1

%

V

DVDD

Input Hysteresis

Input Current

-10

24

+10

FA

pF

Data Input Capacitance

SUBPIXEL GENERATOR

Pixel Clock Frequency Range

Minimum Pulse Width

Subpixel Timing Accuracy

PLL Bandwidth

C

D

Subpixel generator active

1 subpixel

150

(250)

(2)

MHz

ns

T

- T

(-1)

(+1)

ns

PODM

POD

(1200)

2000

(3100)

kHz

2

I C TIMING

Clock Frequency

f

400

kHz

SCL

Bus Free Time Between START

and STOP

t

1.3

0.6

Fs

BUF

HOLD Time for a START

Condition

t

Fs

HD_STA

Setup Time Repeated START

Condition

t

SU_STA

SCL Low Time

t

1.3

0.6

0.1

0.6

Fs

LOW

SCL High Time

t

HIGH

SDA Hold Time

t

0.6

HD_DAT

SDA Setup Time

t

SU_DAT

SU_STO

Setup Time for STOP Condition

Pulse Width of Suppressed

Spikes

t

0.05

Fs

SP

SPI TIMING

SPI Clock Cycle

t

83

ns

CLK

SCL High Pulse Width

SCL Low Pulse Width

SCL Rise/Fall Time

SCL Setup Time

t

41.5

WH

t

WL

t

At f

= 12MHz

16

RF

CLK

t

8

CLKS

CS Setup/Hold Time

CS Recovery Time

t

32

50

CS,

t

CR

Maxim Integrated

10

MAX3601

Laser Driver for Projectors

ELECTRICAL CHARACTERISTICS (continued)

(V

= V

= 1.7V to 1.9V, V

= V

= 2.9V to 3.5V, T = T

to T

, T < +125NC, EN_MAIN and MARKER high,

MAX J

AVDD

DVDD

AVCC

DVCC

A

MIN

V

R0.7V, unless otherwise noted. Typical values are at V

= V

= 1.8V, V

= V

= 3.3V, T = +85NC. Consumer

OUT

AVDD

DVDD

AVCC

DVCC J

grade parts are tested at T = +70NC. Automotive grade parts are tested at T = +105NC. Minimum and maximum specifications are

A

guaranteed by design, characterization and/or production test.)(Note 2)

PARAMETER

Write Data Setup Time

Write Data Hold Time

SYMBOL

CONDITIONS

MIN

16

TYP

MAX

UNITS

ns

t

DS

t

16

ns

DH

Read Data Delay Time

DIO Output Switching Time

t

34

(16)

34

ns

RD

t

R

= 390I, C = 20pF

DIO

11

ns

ZR

DIO

MAX3601C

MAX3601G

DIO Output Disable Time

t

ns

RZ

36

DIO Conflict Avoid Time

t

0

ZZ

POWER-ON RESET (Figure 27)

V

,V

On Threshold

Off Threshold

On Threshold

Off Threshold

2V

1.32

1.28

2.5

(1.6)

(2.8)

V

AVDD DVDD

POR+

,V

2V

(1)

AVDD DVDD

POR-

,V

3V

POR+

DVCC DVCC

,V

3V

(2.2)

2.4

AVCC DVCC

POR-

Note 2: Parameters measured using circuit of Figure 1. R

C

C = open, unless otherwise noted. Parameters in parentheses ( )

S, S, L

are provided for guidance, but are not tested or guaranteed.

Note 3: Power Consumption Calculations:

I

(mA) = I

(mA MHz)× f

(MHz) +

DVDD

3

PIXEL





ENA ×I

(mA MHz)× DCODE

+ ENB ×I

(mA MHz)× DCODE

+ f

(MHz)

∑

N

DVDD

A

N

DVDD

B

PIXEL



G1A

N

G1B

N 

N=1

3

GA

GB

N

255





N

I

(mA) =

ENA ×I

+ I

(

-I

×

+ ENB ×I

+ I

(

-I

DVCC

G1B

×

∑

)

DVCC

N

DVCCD

DVCC

N

DVCC





G1A

G2A

G1A

G1B

G2B

255





N=1

where:

N = OUTPUT 1,2,3, f

is the pixel clock frequency (MHz), ENA_ and ENB_ are the DAC enable signals with value 0 or

PIXEL

1, DCODE is the average number of video code changes per pixel (0 to 255). If the Pulse-Off feature is used 1 time per

pixel, DCODE = 2x Average Video Code Value. If Pulse-Off is used 2 times per pixel, DCODE = 4x Average Video Code

Value (Figure 3).

Note 4: Pulse-Off Assist Current Calculation:

3







I

≈

I

+ C

× DV

× f

PON

∑

(

)

DVCCD

DVCC

OUTN

G1



N=1

where:

N = Output 1,2,3, C

is the total capacitance at OUTN (MAX3601 output capacitance + external capacitance),

OUTN

DV

is the resulting voltage change at OUTN, f

is the frequency of pulse-events in MHz. f

is generally equal

OUTN

PON

to the pixel clock, but could be lower or higher, depending on the pulse-off duty cycle and number of pulse-off events per

pixel.

Maxim Integrated

11

MAX3601

Laser Driver for Projectors

ELECTRICAL CHARACTERISTICS (continued)

(V

= V

= 1.7V to 1.9V, V

= V

= 2.9V to 3.5V, T = T

to T

, T < +125NC, EN_MAIN and MARKER high,

MAX J

AVDD

DVDD

AVCC

DVCC

A

MIN

V

R0.7V, unless otherwise noted. Typical values are at V

= V

= 1.8V, V

= V

= 3.3V, T = +85NC. Consumer

OUT

AVDD

DVDD

AVCC

DVCC J

grade parts are tested at T = +70NC. Automotive grade parts are tested at T = +105NC. Minimum and maximum specifications are

A

guaranteed by design, characterization and/or production test.)(Note 2)

Note 5: Power Estimation Conditions:

For each output, DAC A is enabled, DAC B is off, VIDEO = 27% data as shown in Figure 2, f

Image Duty cycle is 70%, and the MARKER signal is used to reduce power during vertical flyback.

= 150MHz. Vertical

PIXEL

The load emulates:

Red Laser on OUT1: 4I + 2.3V

Green Laser on OUT2: 8I + 3.8V

Blue Laser on OUT3: 16I + 3.5V

GAIN1 GAIN2 GAIN3

V

VA1

(V)

VA2

(V)

VA3

(V)

OUT

PARAMETER VIDEO

PO_EN POC POM_ PHM_

(mA)

200

300

(mA)

180

270

(mA) @I

PEAK

1

2

3

4

0% Video

27% Video

100% Video

Pulse-Off

00h

27%

FFh

70

0.6V

0.8V

3.7

4.3

5.9

6.8

5.2

6.0

0

1

0

70

0

27%

105

4h

FF00h

With Pulse-off

Assist

5

27%

300

270

105

0.8V

4.3

6.8

6.0

1

4h

FF00h FF00h

Note 6: Transfer from supply to I

measured with 100mV

sine wave applied at the supply.

OUT

P-P

f'I

100%

f'V

OUT

T =

×

I

with units %/V. I

typical corner.

= 325mA, T ≤ +110°C, f

= 60Hz to 1MHz. Typical values are at 10kHz, maximum value at 1MHz

OUT

J

OUT

Note 7: AC Parameters characterized with a video pattern of 0x00 to 0xFF, GAIN = 0xFF, 0x3F, 0x1F, 0x0F. All combinations of

output VIDEO DACs: DAC A only, DAC B only, DAC A and DAC B. An external filter network (R , C ) or digital filter may

S

be used to reduce ringing.

I

-I

OUT(CODE=0xFF) OUT(CODE=0x00)

Note 8: 1lsb =

255

Note 9: Integral nonlinearity (INL) is measured as: [I

- Least Squares approximation of current].

OUT

Maxim Integrated

12

MAX3601

Laser Driver for Projectors

0xFF

AVDD

DVDD

AVCC

DVCC

VIDEO WHITE

+1.8V

+3.3V

0

8I

VIDEO TYPICAL

0xFF

D0

D1

OUT1

OUT2

OUT3

V

A3

V

A3

V

A2

C

S

R

S

0x7F

0x3F

0

D2

D3

C

L

D4

D5

0x6t + 0x3F x 5t + 0x7F x 4t + 0xFF x 2t

27% AVERAGE DUTY CYCLE

8I

D6

D7

MAX3601

S

MARKER

D8

70% DUTY CYCLE

D9

C

L

DATA

SOURCE

D10

D11

DCLK

Figure 2. Video Test Pattern

8I

S

80h

NO PO

1xPO

40h

0

EN_MAIN

DIO/SDA

CLK/SCL

CS

C

L

DCODE

40h

PO

DGND

AGND

80h

40h

0

MARKER

DCODE

2x80h

2x40h

2x80h

2x40h

Figure 1. Test Circuit

PO

80h

40h

0

2xPO

DCODE

4x80h

4x40h

4x80h

4x40h

Figure 3. DCode Example

Maxim Integrated

13

MAX3601

Laser Driver for Projectors

MAX3601

MAX3601 CURRENT CONSUMPTION MODEL

V (+1.8V)

DDA

CORE

ANALOG

CORE

DIGITAL

= I

SUBPIXEL

GENERATOR

SP_EN

•EN_MAIN

I

1

= I

CCA

=1.5mA

I

2

• f

= 0.03

DDA1 PIXEL

(MHz) mA

V

(+3.3V)

V

(+1.8V)

I

3

= I = 5mA

DDA

CCA

1

DDD

2

• f

PIXEL

DGND

AGND

3

OUTPUT 1

) = [2.2+2.6 • GA1/255] mA

I

4

I

5

I

6

= I

CCD_G1A

+ GA1/255•(I

- I

OUTPUT1

CC_G2A CC_G1A

DAC A

= I

• f

• DCODE = 0.039 • f

(MHz) • DCODE (%) mA

DDD_G1A PIXEL

PIXEL

= I

OUT_A1

V

(+3.3V)

V

(+1.8V)

DDD

CCD

ENA • P01

ENA

V

OUT1

R

OUT1

4

5

C

6

OUT1

I

7

I

8

I

9

= I

+ GB1/255•(I

- I

) =[1.2+1.0 • GB1/255] mA

(MHz) • DCODE (%) mA

PIXEL

CC_G1B CC_G2B CC_G1B

DAC B

• f

•DCode = 0.01 • f

DDD_G1B PIXEL

OUT_B1

ENA • P01

V

(+3.3V)

V

(+1.8V)

DDD

CCD

ENB

7

6

9

V

(+3.3V)

CCD

PULSE-OFF HELPER

PH1

12

PH_EN1

V

(+3.3V)

CCD

10

11

I

= I

= 1mA

PHS1

10 CCD_G0

= I

11 CCD_G1

PHS1

mA = 0.0015 • 2

• 2

• f

OUT1

• f (MHz) mA

PIXEL

(V) • f

= C (pF)•DV

(MHz)• 1E+9 mA

12

OUT1

PH1

V

OUT2

R

OUT2

OUTPUT 2

C

OUT2

V

OUT3

R

OUT3

OUTPUT 3

C

OUT3

Figure 4. Power-Supply Calculations

Maxim Integrated

14

MAX3601

Laser Driver for Projectors

Typical Operating Characteristics

(V

= V

= 1.8V, V

= V

= 3.3V, V

= 0.7V, R = 8ω, EN_MAIN high, T =+25NC, unless otherwise noted.)

AVDD

DVDD

AVCC

DVCC

OUT

L

A

VIDEO DNL DAC A

(GAIN = 0x20)

VIDEO DNL DAC A

(GAIN = 0xFF)

VIDEO DNL DAC B

(GAIN = 0x20)

0.5

0.4

0.5

0.4

0.5

0.4

T = -40°C, +125°C

J

0.3

T = -40°C, +125°C

J

0.2

T = -40°C, +125°C

J

0.1

0

-0.1

-0.2

-0.3

-0.4

-0.5

-0.1

-0.2

-0.3

-0.4

-0.5

-0.1

-0.2

-0.3

-0.4

-0.5

0

100

200

300

0

100

200

300

0

100

200

300

CODE

VIDEO DNL DAC B

(GAIN = 0xFF)

VIDEO INL DAC A

VIDEO INL DAC B

0.5

0.4

3

2

2.0

1.5

GAIN = 0x20,

T = -40°C

GAIN = 0xFF,

T = -40°C

GAIN = 0x20,

T = -40°C

T

J

= -40°C, +125°C

J

0.3

GAIN = 0x20,

T = +125°C

1.0

J

0.2

1

0.5

0.1

0

GAIN = 0xFF,

T = +125°C

J

-0.1

-0.2

-0.3

-0.4

-0.5

-1.0

-1.5

-2.0

-1

-2

-3

GAIN = 0xFF,

T = +125°C

J

GAIN = 0x20,

T = +125°C

J

GAIN = 0xFF,

T = -40°C

J

0

100

200

300

0

100

200

300

0

100

200

300

CODE

GAIN DNL DAC A

(OFFSET = 0xFF)

GAIN DNL DAC B

(OFFSET = 0xFF)

0.5

0.4

0.3

0.2

T = -40°C, +125°C

J

T = -40°C, +125°C

J

0.1

0

-0.1

-0.2

-0.3

-0.4

-0.5

-0.1

-0.2

-0.3

-0.4

-0.5

0

100

200

300

0

100

200

300

CODE

Maxim Integrated

15

MAX3601

Laser Driver for Projectors

Typical Operating Characteristics (continued)

(V

= V

= 1.8V, V

= V

= 3.3V, V

= 0.7V, R = 8ω, EN_MAIN high, T =+25NC, unless otherwise noted.)

AVDD

DVDD

AVCC

DVCC

OUT

L

A

GAIN INL DAC A

(OFFSET = 0xFF)

GAIN INL DAC B

(OFFSET = 0xFF)

OUT1 PULSE OFF

2.0

1.5

3

2

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0

T = +125°C

J

1.0

1

0.5

T = +125°C

J

T = -40°C

J

0

-0.5

-1.0

-1.5

-2.0

-1

-2

-3

T = -40°C

J

-0.05

10ns/div

0

100

200

300

0

100

200

300

CODE

POWER-SUPPLY TRANSFER TO I

(GAIN = OFFSET = 0xFF)

V TRANSFER TO I

A OUT

(GAIN = OFFSET = 0xFF)

NORMALIZED OUTPUT CURRENT

vs. OUTPUT VOLTAGE

OUT

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0

10

9

8

7

6

5

4

3

2

1

0

120

100

80

60

40

20

0

AVCC

DVCC

DVDD

AVDD

1k

10k

100k

1M

10M

1k

10k

100k

1M

10M

0

0.5

1.0

1.5

FREQUENCY (Hz)

OUTPUT VOLTAGE (V)

OUT_ COMPLIANCE ALARM TRIP

VOLTAGE vs. REGISTER CODE

I

RISE AND FALL TRANSIENT

OUT

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

T

A

= +125°C

T

A

= +125°C, -40°C

2ns/div

0

5

10

15

REGISTER CODE

Maxim Integrated

16

MAX3601

Laser Driver for Projectors

Typical Operating Characteristics (continued)

(V

= V

= 1.8V, V

= V

= 3.3V, V

= 0.7V, R = 8ω, EN_MAIN high, T =+25NC, unless otherwise noted.)

AVDD

DVDD

AVCC

DVCC

OUT

L

A

TEMPERATURE ALARM TRIP POINT

vs. REGISTER CODE

OUT_ DISABLE TIME

140

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

0.40

0.35

0.30

0.25

120

100

80

OUT_

60

0.20

0.15

0.10

0.05

0

EN_MAIN

OR MARKER

40

20

0

-20

50ns/div

0

10

20

30

40

50

REGISTER CODE

SDA LOW VOLTAGE

vs. SDA SINK CURRENT

OUT_ ENABLE TIME

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

0.40

120

100

80

60

40

20

0

0.35

0.30

0.25

EN_MAIN

OR MARKER

0.20

0.15

0.10

0.05

0

OUT_

2µs/div

0

5

10

15

20

SINK CURRENT (mA)

Maxim Integrated

17

MAX3601

Laser Driver for Projectors

Pin/Bump Configurations

TOP VIEW

30 29 28 27 26 25 24 23 22 21

20

31

N.C.

EN_MAIN

N.C.

19 DGND

18 DVCC

32

33

MARKER

17

16

AVCC

AGND

DIO/SDA 34

35

36

37

38

39

40

CLK/SCL

CS

MAX3601

15 AVDD

14

DVDD

13 DGND

12

TESTA

TESTC

D0

EP

8

+

TESTB

11 DCLK

D1

1

2

3

4

5

6

7

9

10

THIN QFN

(5mm x 5mm)

TOP VIEW

(BUMP SIDE DOWN)

MAX3601

1

2

3

4

5

6

7

+

OUT3

DGND

AVCC

AVDD

D11

OUT3

DGND

D9

OUT2

DVCC

DGND

D5

OUT2

OUT1

A

B

C

D

E

DGND

DVCC

AGND

DVDD

TESTB

DCLK

DGND

MARKER

DGND

CS

DVCC

EN_

MAIN

DIO/

SDA

CLK/

SCL

TESTA

D3

D7

D1

TESTC

D0

D10

D8

D6

D4

D2

F

WLP

(3.5mm x 3.0mm)

Maxim Integrated

18

MAX3601

Laser Driver for Projectors

Pin/Bump Description

NAME

FUNCTION

EQUIVALENT INPUT SCHEMATIC

TQFN-EP

WLP

F6

1

2

3

4

5

6

D2

D3

D4

D5

D6

D7

E5

F5

Synchronous Video Data Inputs

DVDD

E4

F4

DIGITAL

INPUT

E3

Synchronous Video Data Input. In DEMUX C

mode, D8 functions as the pixel clock.

7

F3

D8

DGND

8

9

D3

F2

E2

F1

D9

D10

Synchronous Video Data Inputs

10

11

D11

Synchronous Video Data Input, MSB

Video Clock Input

DCLK

TESTA,

TESTB,

TESTC

12, 37, 38

D5, E1, E7

Test Pins. Connect to DGND.

—

A1, B2,

B3, B5,

C3, C4,

C6, D4

13, 19, 21,

24, 27

DGND

DVDD

Digital Ground. Connect to 0V.

1.8V Digital Power Supply. Bypass DVDD

to DGND with 0.1FF and 0.01FF capacitors

as close as possible to the device with the

smaller value capacitor closest to DVDD.

14

D1

—

1.8V Analog Power Supply. Bypass AVDD

to AGND with 0.1FF and 0.01FF capacitors

as close as possible to the device with the

smaller capacitor closest to AVDD.

15

16

17

D2

C1

C2

AVDD

AGND

AVCC

—

Analog Ground. Connect to 0V.

3.3V Analog Power Supply. Bypass AVCC

to AGND with 0.1FF and 0.01FF capacitors

as close as possible to the device with the

smaller capacitor closest to AVCC.

3.3V Digital Power Supply. Bypass DVCC

to DGND with 0.1FF and 0.01FF capacitors

(1 pair per pin) as close as possible to the

device with the smaller value capacitor

closest to DVCC.

18, 22, 25,

28

B1, B4, B7

—

DVCC

N.C.

—

No Connection. There is no connection from

the package to the IC.

20, 30, 32

Maxim Integrated

19

MAX3601

Laser Driver for Projectors

Pin/Bump Description (continued)

NAME

OUT3

OUT2

OUT1

FUNCTION

EQUIVALENT INPUT SCHEMATIC

TQFN-EP

WLP

LASER

OUTPUT

Connection for Laser 3. Leave OUT3

unconnected if unused.

23

A2, A3

Connection for Laser 2. Leave OUT2

unconnected if unused.

26

29

A4, A5

A6, A7

Connection for Laser 1. Leave OUT1

unconnected if unused.

AGND

Laser Enable Input with 100kI Pulldown

31

C5

EN_MAIN to DGND. Set EN_MAIN = high to enable

OUT1–OUT3.

DVCC

DIGITAL

INPUT

Video Marker Input with 100kI Pullup to

33

B6

MARKER

DVDD

2

34

35

C7

D7

DIO/SDA

CLK/SCL

SPI and I C Serial Data Input/Output

2

SPI and I C Serial Clock Input

DGND

SPI Chip Select with 100kI Pulldown to

2

36

39

D6

F7

CS

D0

DGND. Connect CS to DVDD for I C mode.

Set CS = low on power-up for SPI mode.

DVDD

Synchronous Video Data Input, LSB

DIGITAL

INPUT

DGND

40

—

E6

—

D1

EP

Synchronous Video Data Input

Exposed Pad (TQFN Only). EP is internally

connected to DGND. The EP must be

connected to the PCB ground plane through

an array of vias for proper thermal and

electrical performance.

—

Maxim Integrated

20

MAX3601

Laser Driver for Projectors

Functional Diagram

MAX3601

A1

B1

C1

C2

VIDEO DEMULTIPLEXER

DEMUX A

D0

D1

D2

D3

D4

D5

D6

D7

D8

D9

D10

D11

VIDEO

8

PO, PH

PULSE TIMING

ENA1, ENB1

VSA1, VSB1

OSA1, OSB1

PHS1, AL1

GA1, GB1

ENA, ENB

VSA, VSB

OSA, OSB

PHS, AL

GA, GB

OUT1

OUT2

OUT3

OUTPUT1

OUTPUT2

OUTPUT3

D3:D0

D7:D4

4:8

A1

A2

A3

POM1

PHM1

POC1

D11:D8

PHEN1

A2

B1

C2

C3

VIDEO

CLK_IN

8

PO, PH

PULSE TIMING

CLK_OUT

ENA2, ENB2

VSA2, VSB2

OSA2, OSB2

PHS2, AL2

GA2, GB2

ENA, ENB

VSA, VSB

OSA, OSB

PHS, AL

GA, GB

POM2

PHM2

POC2

DEMUX B

D0:D7

LATCH

B1

PHEN2

A3

B1

C2

C3

VIDEO

8

DEMUX C

D0:D7

D8

PO, PH

C1

C2

C3

PULSE TIMING

DATA CLOCK

ENA3, ENB3

VSA3, VSB3

OSA3, OSB3

PHS3, AL3

GA3, GB3

ENA, ENB

VSA, VSB

OSA, OSB

PHS, AL

GA, GB

POM3

PHM3

POC3

D8 LATCHED

DCLK

DEMUX

SELECT

LOGIC

PHEN3

MS

SP

SUBPIXEL TIMING

TEMPERATURE

ALARM

TSET

TALM

PIXEL CLOCK

SUBPIXEL GENERATOR

TESTA

TESTB

TESTC

ENABLE LOGIC (i = 1, 2, 3)

EN_MAIN

MARKER

OEA

I

AND

ENA

ENB

i

OR

AND

TALM

AL_

TSET

VE_

MS

DGND

AGND

VE

I

VM_

EN_

AND

OEB

I

SP

POM_

PHM_

OR

AVCC

DVCC

+3.3V

+1.8V

SERIAL PORT

AND

REGISTERS

PHEN

i

PHS_

VSB_

VSA_

GA_

POR

POWER-ON

RESET

CS

DVDD

AVDD

DIO/SDA

CLK/SCL

GB_

OSA_

OSB_

SR_

BOLD LINE INDICATES PARALLEL DATA.

Maxim Integrated

21

MAX3601

Laser Driver for Projectors

Demux A

Demux A converts 4-bit input with DDR clock to 8-bit data

with pixel clock. Input data must be formatted as shown

in Figure 5. Four MSBs are latched on the rising edge of

DCLK, and four LSBs are latched on the falling edge of

DCLK.

Detailed Description

The laser driver for projectors supports video imaging

with red, blue, and green lasers. Each output includes

two 8-bit video/offset DACs with programmable gain and

offset.

Demux B

Demux B latches an 8-bit video input on the rising edge

of clock. The same video is sent to all outputs.

Video Demultiplexer

The Video Demultiplexer supports three video formats

and pixel clock configurations. The video format and

demultiplexer are selected by the MUX select register

(MS) as shown in Table 7.

PIXEL

D0

PIXEL 1

PIXEL 2

A1[4]

A1[5]

A1[6]

A1[7]

A2[4]

A2[5]

A2[6]

A2[7]

A3[4]

A3[5]

A3[6]

A3[7]

A1[0]

A1[1]

A1[2]

A1[3]

A2[0]

A2[1]

A2[2]

A2[3]

A3[0]

A3[1]

A3[2]

A3[3]

A1[4]

A1[5]

A1[6]

A1[7]

A2[4]

A2[5]

A2[6]

A2[7]

A3[4]

A3[5]

A3[6]

A3[7]

A1[0]

A1[1]

A1[2]

A1[3]

A2[0]

A2[1]

A2[2]

A2[3]

A3[0]

A3[1]

A3[2]

A3[3]

D0

D1

B1[0]

B1[1]

B1[0]

B1[1]

D1

D2

D3

D7

B1[7]

D4

D5

t

H

SU

D6

DCLK

D7

D8

Figure 6. Video Demultiplexer B Input Waveform

D9

D10

D11

t

H

SU

DCLK

Figure 5. Video Demultiplexer A Input Waveform

Maxim Integrated

22

MAX3601

Laser Driver for Projectors

PIXEL

D7–D0

D8

PIXEL 1

PIXEL 2

C3

1

C1

0

C2

0

C3

1

C1

0

C2

0

C3

1

C1

0

t

H

SU

DCLK

OUT1

OUT2

OUT3

C1

C2

C3

C1

C2

C3

C1, C2, C3 ARE 8-BIT VIDEO DATA, OUTPUT SHOWN FOR MS = 2

Figure 7. Video C Demultiplexer Input Waveform

Demux C

Demux C is compatible with the data format of the

MAX3600. Data for the three outputs is multiplexed in

time and uses a DDR clock.

DCLK

-2

-1

D

8

C1

C2

Q

D

DCLK

D

Q

D

DCLK

0

8

C3

Q

D

= CLOCK ON BOTH

EDGES (DDR)

D7:D0

= CLOCK ON

RISING EDGE

D8

LATCHED

DCLK

D8

Q

D

Figure 8. Video C Demultiplexer

Maxim Integrated

23

MAX3601

Laser Driver for Projectors

despeckling the laser light. Each output of the laser

driver can have different pulse widths or multiple pulses.

If unused, disable the subpixel generator (D0 of register

0x0B) for additional power savings.

Pulse Timing Generator

The Pulse Timing generator creates phases of the pixel

clock called subpixels (Figure 9). The subpixel timing

signals enable laser current output pulsing for use with

I

OUT

V

OUT

PO

PH

t

PO

t

POH

t

PIXEL

SUBPIXEL 14

15

0

1

0

1

2

1

3

1

0

4

1

0

5

1

0

6

0

7

0

8

9

0

10

0

11

0

12

0

13

0

14

0

15

0

1

0

1

2

1

3

1

4

1

0

5

1

0

6

0

POM_REGISTER

0

PHM_REGISTER

VIDEO

0

PIXEL

Figure 9. Pulse Timing Generator

Maxim Integrated

24

MAX3601

Laser Driver for Projectors

Subpixel Programming

The subpixel programming bits (D[2:0] of register 0x0C)

determine the number of subpixels and duration of the

pulse time (Table 1). The pulse width is applied to every

pixel when the programmed pulse-off length > 0. This

can be dynamically implemented to adjust for various

lighting conditions.

(POC) register selects options shown in Table 2. Random

pulse-off events are triggered from a 31-bit pseudo-

random bit-stream. By default, the PRBS is common to

all outputs. Bit D4 of the POC_ registers determine which

PRBS bits control each output (Table 3).

Pulse-off synchronization between outputs occurs when

POC_ registers match and POC_[4] = 0. For example, if

POC1 = POC2 = POC3 and POC_[4] = 0, the occurrence

of randomized pulse-off events at all outputs will be

synchronized.

Pulse-Off

The pulse-timing generator can be configured to skip

pulse events to save power. The Pulse-Off Configuration

Table 1. Subpixel Programming (SP

Register)

Table 2. Pulse-Off Duty Cycle (POC_

Register)

f

(MHz)

MAX

200

150

100

75

POC_[3:0]

0000*

PULSE-OFF DUTY CYCLE

Every pixel, 100%

Random, 87.5%

ACTIVE

SUBPIXELS

INACTIVE

SUBPIXELS

PIXEL

SP

MIN

150

75

000

001*

010

011

100

101

110

111

0:7

0:15

0:11

0:15

0:9

8:15

—

0001

0010

Random, 75.0%

50

12;15

—

0011

Random, 62.5%

37.5

30

0100

Random, 50.0%

60

10:15

—

0101

Random, 37.5%

25

50

0:15

0:13

0:15

0110

Random, 25.0%

21.4

18.75

42.8

37.5

14:15

—

0111

Random, 12.0%

1XXX

Every other pixel, 50%

*Power-on default

Table 3. Random Pulse-Off Programming

PRBS31 BITS USED

OUTPUT 2

POC_[4]

OUTPUT 1

OUTPUT 3

PRBS31[16], [15], [0]

PRBS31[2:0]

0*

PRBS31[4], [3], [0]

PRBS31[8], [7], [0]

PRBS31[2:0]

1

PRBS31[2:0]

*Power-on default

Maxim Integrated

25

MAX3601

Laser Driver for Projectors

10). DACA has 4x the current output capability of

DACB but is otherwise identical. Video Data is input

from the high-speed data inputs. VSA_ and VSB_

determine the output behavior of the two video DACs

(Table 4 and Table 5) The output video of either DAC

can be any of the following:

Driver Outputs

Each of the three laser driver outputs contains two video

DACs, two gain DACs, a Compliance Voltage alarm,

and Pulse-Off Assist. For power savings, the MAX3601

reduces supply current when outputs are not in use.

Video DACs

Each laser driver output contains two video DACs that

produce current representing the video image (Figure

U Video data

U Pulse-off with zero amplitude

DRIVER OUTPUTS

MAX3601

R

PH

AVCC

OUT_

PH_

2

COMPLIANCE

VOLTAGE SENSOR

AL_

PULSE-OFF HELPER

PHS_

GAIN DAC A

8

GA_

ENABLE

8

0

REF

8

VIDEO

DAC A

OSA_

CODE

8

ENABLE

VIDEO_

3

VSA_

SELECT

LOGIC A

PO_

ENA_

ENB_

SELECT

LOGIC B

3

VSB_

ENABLE

VIDEO

8

OSB_

CODE

DAC B

REF

0

8

GB_

ENABLE

GAIN DAC B

Figure 10. Driver Output

Maxim Integrated

26

MAX3601

Laser Driver for Projectors

U Pulse-off with non-zero amplitude

U Constant value set from serial port

U Zero amplitude

Table 4. Video Select Logic for DAC A

ENA_

VSA_

VIDEO

PO

X

0

CODE DAC A

0

X

0

VIDEO

0

U Constant for VIDEO > 0, zero when VIDEO = 0

000*

001

010

011

X

1

The two gain DACs adjust the full-scale output current

for laser slope efficiency and color balance. Video Gain

is programmed from the serial port. Full-scale output for

Video DACs A and B are adjustable up to a peak output

of 320mA and 80mA, respectively (Figure 11). The laser

driver output current is the combined output of DAC A

and B:

0

VIDEO

OSA_

0

1

0

1

0

OSA_

0

1

X

0

1

CODEA GA

CODEB GB

FFh FFh









X

0

I

(mA) =

× 320 +

× 80 + OSERR

OUT













FFh FFh



100

OSA_

0

> 0

1

where OSERR is the offset error.

Carefully consider the absolute maximum ratings of

output current. If I is 400mA peak with 50% duty

101

110

111

X

0

OUT

0

cycle over the life of the product, the average DC current

is 200mA.

*Power-on default

Table 5. Video Select Logic for DAC B

FULL-SCALE AVERAGE CURRENT RANGE (mA)

ENB_

VSB_

VIDEO

PO

X

0

CODE DAC B

400

0

X

0

VIDEO

0

000*

001

010

011

X

350

1

0

VIDEO

OSB_

0

300

250

200

150

100

50

OUTPUT PULSE

DUTY CYCLE

1

0

100%

50%

1

0

OSB_

0

1

X

0

1

X

0

100

OSB_

0

> 0

1

101

110

111

X

0

*Power-on default

0

Figure 11. Driver Output Full-Scale Current Range

Maxim Integrated

27

MAX3601

Laser Driver for Projectors

COMPLIANCE VOLTAGE ALARM

+V

CCA

R

OUT1

(400kI)

NEGATIVE

PEAK

DETECT

FILTER 2

= 2.5ns

FILTER 1

= 1ns

V

OUT_

H

S

VSET_[3:0]

R

Q

VSET_DAC

VALM

RESET

ON READ

Figure 12. Output Compliance Sensor

Setting the PHM_ register > 0 and setting either ENA_ or

ENB_ high enables the pulse-off Assist circuit. In addition,

the circuit is only active when MARKER is high and either

output is enabled. During a pulse-off event, laser voltage

is momentarily connected to 3.3V to improve turn-off

time of slow lasers. Note that the pulse-off assist is only

effective when the OSA_ and OSB_ registers are set to

zero during pulse-off.

VIDEO

PROCESSOR

MAX3601

LASER

D0

OUT_

VIDEO DATA

COMPLIANCE ALARM

(VIA SPI/I2C)

V

A

LASER

VOLTAGE

CONTROL

Compliance Voltage Sensor

The output voltage affects overshoot, settling time and

linearity. The compliance alarm detects output voltage

lower than a programmed threshold (Table 6) and sets

the Compliance Alarm (VALM_) bit (Figure 12). The alarm

is cleared when read. The compliance alarm can be used

to adjust laser power supplies after video data containing

50ns of bright pixels has been transmitted (Figure 13).

The VALM bit will typically be set at power-on.

POWER MANAGEMENT

VIDEO

IMAGE

V

OUT

Table 6. Compliance Alarm Setpoint

V

SET

TYPICAL COMPLIANCE VOLTAGE

LASER

VOLTAGE

CONTROL

ACTION

INCREASE V IF

A

COMPLIANCE ALARM

TRIPPED,

VSET_[3:0]

THRESHOLD (V)

DO NOTHING

0000*

0001

0010

0.40

0.48

0.56

OTHERWISE

DECREASE V .

A

Figure 13. Example Use of Compliance Sensor

.

Pulse-Off and Pulse-off Assist

The Pulse feature rapidly pulses the laser off. The “off”

level is set by the VSA_ and VSB_ registers (Table 4,

Table 5).

1110

1111

1.52

1.60

*Power-on default

Maxim Integrated

28

MAX3601

Laser Driver for Projectors

Temperature Alarm

The temperature alarm reports if the driver temperature

has exceeded a programmable threshold as shown in

Figure 14. The alarm is cleared when the TALM register

is read. If the die temperature is still above the threshold,

the temperature alarm immediately re-asserts itself. The

temperature threshold is programmed with the T_SET

register. The temperature alarm threshold includes offset

of the temperature sensor. Accuracy of the threshold

is increased by calibration of the alarm at a known

temperature.

TEMPERATURE ALARM

TEMPERATURE

SENSE

S

R

DAC

TSET[5:0]

Q

TALM

RESET

ON READ

Figure 14. Temperature Alarm

For example, if it is desired to set a temperature alarm

at T = +125NC: With T = +25NC and outputs disabled,

J

A

ramp TSET and read TALM. The code TSET , where

25

the alarm is set, corresponds to T ≈ +25NC. TSET

≈

J

125

TSET + 100NC/2.5NC/LSB.

25

Control Logic

The Control Logic provides video selection, laser enable,

and power savings.

VIDEO AREA

MARKER = 1

Video Selection

The video demultiplexers A, B, and C creates signals A1–

A3, B1, and C1–C3. The MS bits select the input source

video for VIDEO1, VIDEO2, and VIDEO3.

NON-VIDEO AREA

(MARKER = 0 SELECTED OUTPUTS DISABLED)

Laser Control

When EN_MAIN is low, all drivers are off. This signal

works asynchronously (no clock is required to disable

outputs).

HORIZONTAL SCAN

Figure 15. Video Marker

The Video Marker (MARKER) input can be used to

disable selected outputs when a video signal is not

present (Figure 15). The VE[1:3] bit settings determine

which outputs respond to the MARKER signal.

Table 7. Video Demultiplexer Selection

Logic

PIXEL

MS[2:0]

CLOCK

VIDEO 1 VIDEO 2 VIDEO 3

SOURCE

000*

001

010

011

100

101

110

111

DCLK

D8**

A1

A2

B1

C2

C3

A3

B1

C3

C2

C3

B1

C1

D8**

C2

D8**

C2

D8**

C2

RESERVED

*Power-on default

**D8 is gated by DCLK

Maxim Integrated

29

MAX3601

Laser Driver for Projectors

period of the SCL clock pulse (Figure 17). Changes in

SDA while SCL is high are control signals (see the START

and STOP Conditions section for more information).

Serial Port and Registers

2

The MAX3601 contains an I C interface and a 3-wire SPI

interface. The communication mode is determined by the

state of CS at power-on. If CS is high (tied to DVDD), I C

mode is selected. If CS is open or low at power-on, SPI

mode is selected.

Each transmit sequence is framed by a START (S)

condition and a STOP (P) condition. Each data packet is

9 bits long; 8 bits of data followed by the acknowledge

bit.

2

I C Interface

START and STOP Conditions

When the serial interface is inactive, SDA and SCL

idle high. A master device initiates communication by

issuing a START condition. A START condition is a

high-to-low transition on SDA with SCL high. A STOP

condition is a low-to-high transition on SDA, while SCL

is high (Figure 18).

The serial bus consists of a bidirectional serial-data

line (SDA) and a serial-clock input (SCL). The master

generates the clock signal (Figure 16).

2

I C is an open-drain bus. SDA and SCL require pullup

resistors (500I or greater). Voltage clamps on the input

protect the device high-voltage spikes not exceeding the

absolute maximum voltage rating.

A START condition from the master signals the beginning

of a transmission. The master terminates transmission by

issuing a not-acknowledge followed by a STOP condition

(see Figure 19 for more information). The STOP condition

frees the bus. To issue a series of commands to the slave,

the master may issue repeated START (Sr) commands

instead of a STOP command in order to maintain control

of the bus. In general, a repeated START command is

functionally equivalent to a regular START command.

Data Transfer

One data bit is transferred during each SCL clock cycle.

The data on SDA must remain stable during the high

SDA

SCL

When a STOP condition or incorrect address is detected,

the MAX3601 internally disconnects SCL from the serial

interface until the next START condition, minimizing

digital noise and feedthrough.

MASTER

TRANSMITTER/

RECEIVER

SLAVE

TRANSMITTER/

RECEIVER

SLAVE

RECEIVER

2

Figure 16. I C Master/Slave Configuration

SDA

SCL

SDA

SCL

DATA LINE STABLE

DATA VALID

CHANGE OF

DATA ALLOWED

START CONDITION

STOP CONDITION

2

Figure 17. I C Bit Transfer

Figure 18. I C START and STOP Conditions

Maxim Integrated

30

MAX3601

Laser Driver for Projectors

Acknowledge

Both the master and the MAX3601 (slave) generate

acknowledge bits when receiving data. The acknowledge

bit is the last bit of each 9-bit data packet (Figure 19). To

generate an acknowledge (A), the receiving device must

pull SDA low before the rising edge of the acknowledge-

related clock pulse (ninth pulse) and keep it low during

the high period of the clock pulse. To generate a not

acknowledge (NA), the receiving device allows SDA to be

pulled high before the rising edge of the acknowledge-

related clock pulse and leaves it high during the high

period of the clock pulse.

Monitoring the acknowledge bits allows for detection

of unsuccessful data transfers. An unsuccessful data

transfer occurs if a receiving device is busy or if a system

fault has occurred. In the event of an unsuccessful data

transfer, the bus master should reattempt communication

at a later time.

Slave Address

A bus master initiates communication with a slave device

by issuing a START condition followed by the slave

address. The slave address byte consists of 7 address

bits (1110 001) and a read/write bit (R/W) which is a 0 for

write and a 1 for read. After receiving the proper address,

the MAX3601 issues an acknowledge by pulling SDA low

during the ninth clock cycle. The MAX3601 write address

is 0xE2. MAX3601 read address is 0xE3.

SDA OUTPUT

FROM

TRANSMITTER

D7

D6

D0

2

I C Communication Protocols

The following I C communications protocols are

NOT ACKNOWLEDGE

SDA OUTPUT

FROM

2

supported by the MAX3601

RECEIVER

1) Writing to a Single Register

2) Writing to Sequential Registers

3) Reading from a Single Register

4) Reading from Sequential Registers

SCL FROM

MASTER

ACKNOWLEDGE

9

1

2

8

CLOCK PULSE FOR

ACKNOWLEDGEMENT

START CONDITION

2

Figure 19. I C Acknowledge

SDA

t

BUF

t

SU,STA

t

SU,DAT

t

HD,STA

t

LOW

t

SU,STO

t

HD,DAT

t

HIGH

SCL

t

HD,STA

t

F

R

START CONDITION

REPEATED START CONDITION

STOP CONDITION START CONDITION

2

Figure 20. I C Timing Diagram

Maxim Integrated

31

MAX3601

Laser Driver for Projectors

Writing to a Single Register

Figure 21 shows the protocol for the I C master device to

Writing to Sequential Registers

Figure 21 shows the protocol for the I C master device

2

write one byte of data to the MAX3601. The “write byte”

protocol is as follows:

to sequentially write data to the MAX3601. The sequential

write protocol is as follows

1) The master sends a START command (S).

2) The master sends the 7-bit slave address followed

by a write bit.

2) The master sends the 7-bit slave address followed

by a write bit.

3) The addressed slave asserts acknowledge (A) by

pulling SDA low.

3) The addressed slave asserts an acknowledge (A) by

pulling SDA low.

4) The master sends an 8-bit register pointer.

5) The slave acknowledges the register pointer.

6) The master sends a data byte.

4) The master sends an 8-bit register pointer.

5) The slave acknowledges the register pointer.

6) The master sends a data byte.

7) The slave updates with the new data

8) The slave acknowledges the data byte.

9) The master sends a STOP condition.

7) The slave updates with the new data.

8) The slave acknowledges the data byte.

9) Steps 6 to 8 are repeated as many times as the mas-

ter requires.

10) The master sends a STOP condition.

LEGEND

MASTER TO SLAVE

SLAVE TO MASTER

A. WRITING TO A SINGLE REGISTER WITH THE "WRITE BYTE" PROTOCOL

NUMBER OF BITS

1

7

1

0

1

8

1

8

1

S

SLAVE ADDRESS

A

REGISTER POINTER

A

DATA

A

P

R/W

B. WRITING TO MULTIPLE REGISTERS

NUMBER OF BITS

1

7

1

0

1

8

1

8

1

8

1

S

SLAVE ADDRESS

A

REGISTER POINTER X

A

DATA X

A

DATA X+1

A

R/W

NUMBER OF BITS

8

1

8

1

DATA X+n-1

A

DATA X+n

A

P

2

Figure 21. I C Writing

Maxim Integrated

32

MAX3601

Laser Driver for Projectors

Reading from a Single Register

Figure 22 shows the protocol for the I C master device to

read one byte of data to the MAX3601.

The “read byte” protocol is as follows:

1) The master sends a START command (S).

Reading from Sequential Registers

Figure 22 shows the protocol for reading from sequential

registers. This protocol is similar to the “read byte”

protocol except the master issues an acknowledge to

signal the slave that it wants more data. When the master

has all the data it requires, it issues a not-acknowledge

(NA) and a STOP (P) to end the transmission. The

“continuous read from sequential registers” protocol is

as follows:

2

2) The master sends the 7-bit slave address followed

by a write bit.

3) The addressed slave asserts an acknowledge (A) by

pulling SDA low.

1) The master sends a START command (S).

4) The master sends an 8-bit register pointer.

5) The slave acknowledges the register pointer.

6) The master sends a repeated START command (Sr).

2) The master sends the 7-bit slave address followed

by a write bit.

3) The addressed slave asserts acknowledge (A) by

pulling SDA low.

7) The master sends the 7-bit slave address followed

by a read bit.

4) The master sends an 8-bit register pointer.

5) The slave acknowledges the register pointer.

6) The master sends a repeated START command (Sr).

8) The addressed slave asserts acknowledge by pull-

ing SDA low.

9) The addressed slave places 8 bits of data on the bus

from the location specified by the register pointer.

7) The master sends the 7-bit slave address followed

by a read bit.

10) The master issues a not-acknowledge (NA).

11) The master issues a STOP condition (P).

8) The addressed slave asserts acknowledge by pull-

ing SDA low.

9) The addressed slave places 8 bits of data on the bus

from the location specified by the register pointer.

The procedure (6) Sr cannot be replaced to STOP (P)

and START (S).

LEGEND

MASTER TO SLAVE

SLAVE TO MASTER

A. READING A SINGLE REGISTER

NUMBER

OF BITS

1

7

1

0

1

8

1

7

1

8

S

SLAVE ADDRESS

A

REGISTER POINTER

A

Sr

SLAVE ADDRESS

A

DATA

NA

P

R/W

B. READING MULTIPLE REGISTERS

R/W

NUMBER

OF BITS

1

7

1

0

1

8

1

7

1

8

S

SLAVE ADDRESS

A

REGISTER POINTER X

A

Sr

SLAVE ADDRESS

A

DATA X

A

NUMBER

OF BITS

R/W

8

DATA X+1

A

DATA X+n-1

A

DATA X+n

NA

P

2

Figure 22. I C Reading

Maxim Integrated

33

MAX3601

Laser Driver for Projectors

10) The master issues acknowledge (A) signaling the

slave that it wishes to receive more data.

SPI Interface

Use the power-on and CS timing shown in Figure 23

when using the SPI interface.

11) Steps 9 and 10 are repeated as many times as the

master requires. Following the last byte of data, the

master must issue a not-acknowledge (NA) to signal

that it wishes to stop receiving data.

Read/Write Data Using 3-Wire SPI

For both read/write, first set chip select (CS) high

(Figure 24). Once the clock starts, specify the first bit

(read/write data), then the register address and then the

data. The SPI interface supports single byte and burst

read/writes.

12) The master issues a STOP condition (P).

Read and write commands use MSB first. During a burst

read/write, the register address auto-increments. Auto-

incrementing is cyclic; address 0x00 follows address

0x7F.

1.6V

V

DD

When writing data, the data needs to be entered in 8-bit

units. If the 8-bit data is not complete before CS goes to

0, the data will not be written correctly (Figure 25).

30ms

(min)

When reading data, DIO changes from input to output

after receiving the address bits (Figure 26). To prevent

collision, switch the microcontroller port driving DIO to an

input or use open-drain logic.

0.3V

(max)

CS

Figure 23. AVDD, DVDD, and CS Timing for SPI Mode

t

CSE

CS

t

CLK

t

CS

t

RF

t

CR

t

WH

WL

t

RF

CLKS

t

CH

CLK

1

2

4

50%

t

DH

DS

t

RZ

RD

DIO

(READ)

1

0

A6

A0

D7

D6

D0

t

ZR

t

ZZ

DIO

(WRITE)

D7

D0

Figure 24. SPI Timing

Maxim Integrated

34

MAX3601

Laser Driver for Projectors

SINGLE BYTE WRITE

CS

CLK

1

2

3

4

5

6

7

8

A6 A5 A4 A3 A2 A1

ADDRESS

DIO

0

A0 D7 D6 D5 D4 D3 D2 D1 D0

DATA

MODE

BURST WRITE

CS

CLK

DIO

1

2

3

4

5

6

7

8

A6 A5 A4 A3 A2 A1

ADDRESS

0

A0 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5

D2 D1 D0

DATA N

DATA1

DATA2

MODE

Figure 25. SPI Write Timing

SINGLE BYTE READ

CS

CLK

DIO

1

2

3

4

5

6

7

8

1

A6 A5 A4 A3 A2 A1 A0

ADDRESS

D7 D6 D5 D4 D3 D2 D1 D0

DATA

MODE

BURST READ

OUTPUT FROM DEVICE

CS

CLK

1

2

3

4

5

6

7

8

DIO

A6 A5 A4 A3 A2 A1 A0

ADDRESS

D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5

D2 D1 D0

DATA N

1

DATA 1

DATA 2

MODE

OUTPUT FROM DEVICE

Figure 26. SPI Read Timing

Maxim Integrated

35

MAX3601

Laser Driver for Projectors

Table 8. Register Table

ADDRESS

DEFAULT

NAME DESCRIPTION

[hex]

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

(hex)

0x0E

(READ

ONLY)

0x00

0 (MSB)

0

1

0

Device

DEVID

Identification

0x11

0x01

0

X

0

X

0

X

1

0

X

0

X

0

X

0

X

1 (LSB)

1

(READ

ONLY)

Version

0x02

0x03

0x04

0x05

VER1

VER2

TSET

TALM

0x01

Identification 1

0x0X

(READ

ONLY)

Version

X

TG

Identification 2

Temperature

Setpoint

MSB

X

LSB

AL

0x00

Temperature

Alarm

X

(READ

ONLY)

0x00

0x06

VALM Voltage Alarm

X

AL3

AL2

AL1

(READ

ONLY)

0x07

0x08

OE

VE

Output Enable

X

OEB3

X

OEA3

X

OEB2

X

OEA2

VE3

OEB1

VE2

OEA1

VE1

0x00

Video Marker

Enable

0x00

Demux Mode

Select

0x09

0x0A

MS

—

X

MSB

X

LSB

X

0x00

RESERVED

Subpixel

X

0x0B

SP_EN Generator

Enable

X

SP_EN

0x00

0x0C

0x0D

SP

Subpixel Select

X

MSB

LSB

0x01

0x04

Subpixel

Tuning

SP_T

SP_T2

SP_T1

SP_T0

OUT1 Video

Select A

0x10

0x11

0x12

0x13

0x14

VSA1

VSB1

GA1

X

MSB

LSB

0x00

OUT1 Video

Select B

X

OUT1 DAC A

Gain

MSB

OUT1 DAC B

Gain

GB1

OUT1 DAC A

Offset

OSA1

Maxim Integrated

36

MAX3601

Laser Driver for Projectors

Table 8. Register Table (continued)

ADDRESS

DEFAULT

NAME DESCRIPTION

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

[hex]

(hex)

OUT1 DAC B

0x15

OSB1

Offset

MSB

LSB

0x00

0x16

0x17

0x18

0x19

0x00

OUT1 Pulse-Off

POM1

Assist Mask

LSB

MSB

X

OUT1 Pulse-

PHM1

Assist Mask

LSB

OUT1 Pulse-

PHS1

0x1A

X

MSB

0x00

Assist strength

OUT1

VSET1 Compliance

Alarm

0x1B

X

MSB

LSB

0x00

OUT2 Video

VSA2

0x20

0x21

0x22

0x23

0x24

0x25

X

MSB

LSB

0x00

Select A

OUT2 Video

VSB2

X

Select B

OUT2 DAC A

GA2

Gain

MSB

OUT2 DAC B

GB2

Gain

OUT2 DAC A

OSA2

Offset

OUT2 DAC B

OSB2

Offset

MSB

0x26

0x27

0x28

0x29

0x00

OUT2 Pulse-Off

POM2

Mask

LSB

PHM2

MSB

OUT2 Pulse-

Assist Mask

LSB

OUT2 Pulse-

0x2A

PHS2

X

MSB

0x00

Assist Strength

OUT2

0x2B

VSET2 Compliance

Alarm

MSB

LSB

0x00

OUT2 Video

VSA3

0x30

0x31

0x32

0x33

X

MSB

LSB

0x00

Select A

OUT2 Video

VSB3

X

Select B

OUT2 DAC A

GA3

Gain

MSB

OUT2 DAC B

GB3

Gain

Maxim Integrated

37

MAX3601

Laser Driver for Projectors

Table 8. Register Table (continued)

ADDRESS

DEFAULT

NAME DESCRIPTION

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

LSB

[hex]

(hex)

OUT2 DAC A

0x34

OSA3

Offset

MSB

0x00

OUT2 DAC B

0x35

OSB3

Offset

MSB

LSB

0x00

0x36

0x37

0x38

0x39

0x00

OUT2 Pulse-Off

POM3

Mask

LSB

MSB

OUT2 Pulse-

PHM3

Assist Mask

LSB

OUT2 Pulse-

PHS3

0x3A

X

MSB

0x00

Assist Strength

OUT2

VSET3 Compliance

Alarm

0x3B

MSB

LSB

0x00

0x40

0x41

0x42

0x43

X

MSB

(READ

ONLY)

DG1 Diagnostic 1

0x00

LSB

(READ

ONLY)

0x00

DG2 Diagnostic 2

DG3 Diagnostic 3

X

PORB

DCLK

MARKER EN-MAIN

(READ

ONLY)

0x00

PH3_EN PH2_EN PH1_EN CMPS3_EN CMPS2_EN CMPS1_EN

TS_EN

BIAS_EN

(READ

ONLY)

0x44

0x45

0x46

RST

—

Soft Reset

RESERVED

X

RST

X

0x00

—

X

Pulse-Off

Config 1

0x47

0x48

0x49

POC1

POC2

POC3

X

MSB

LSB

0x00

Pulse-Off

Config 2

Pulse-Off

Config 3

Maxim Integrated

38

MAX3601

Laser Driver for Projectors

Design Procedure

Power-On-Reset

The power-on-reset monitors the supply voltages of

the circuit. It is recommended that AVCC/DVCC and

Select Lasers

Figure 28 shows the model of the driver output and laser.

Table 9 lists the component values for typical lasers of

various colors.

AVDD/DVDD be applied before V -V

On power-down, it is recommended that V -V

are applied.

A1 A3

are

A1 A3

powered down before AVCC/DVCC and AVDD/DVDD.

Failure to follow the sequencing recommendation may

result in device stress, but has not been observed to

cause immediate damage.

Supply Filter

Element C (see the Typical Operating Circuits) is

F

present to reduce supply noise and provide a ground

• The pulse-off Assist function connects the driver out-

put to AVCC (+3.3V). To prevent laser damage from

reverse voltage, the pulse-off Assist function should

return path for switched current. C can be composed of

F

two or three capacitors in parallel. Use care to ensure V

A

does not exceed 8.4V at any time, including power-on, as

this can damage the ESD protection circuitry.

only be enabled after V > AVCC. The pulse-off Assist

A

defaults to disabled at power-on (The signal PH_EN_

is low).

Table 9. Typical Laser Diode Parameters

VOLTS

PARAMETER

RED

1.9

0.4

4

GREEN

BLUE

2.5

1

UNITS

V

DATA AND CLOCK INPUTS

V

2.3

1.5

9

F

V

at 10mA

V

D1

R

1

20

50

4

I

V

A_

t

(0.1µs)

VCC_ON

C

50

4

50

4

pF

nH

I

1

L1

Z0

20

1.5

5

20

1.5

5

20

1.5

5

V

, V

CC DD

Length

cm

MI

R

LK

TIME

I

PEAK

300

3.8

250

8.2

125

6

mA

V

(Continuous)

Figure 27. Power-Supply Sequencing

V

at I

F

PEAK

LASER DRIVER

LASER

OUT

FLEX

L

PKG

L1

R1

Z , LENGTH

0

I

R

C

PKG

OUT

DVR

C1

R

LK

D1

V

+

-

F

10µF

DGND

Figure 28. Laser and Package Model

Maxim Integrated

39

MAX3601

Laser Driver for Projectors

temperature register and adjust laser current to prevent

overheating. The junction temperature is estimated by:

MAX3601

LASER

T

V

≈ [(I

)] B + T

)(V

) + (I

)(V

) + C(I

)(V

VA_ A_

-

J

_VDD _VDD

_VCC _VCC

V

OUT_

A

D_

JA A

C

R

C

where:

I

is the laser diode current

is the laser supply voltage

VA_

Figure 29. Optional Compensation Components

V

A_

D_

JA

is the voltage drop across the laser diode.

is the junction to ambient thermal resistance

B

T is the ambient temperature

Compensation Network

Optional compensation elements R and C can

be used to compensate the inductive load of the

laser (Figure 29). The resulting filter reduces ringing

and increases the switching time of the laser driver.

A

C

The recommended thermal path is through the package

backside exposed pad (EP). A heatsink on the package

top does not significantly reduce junction temperature.

RecommendationsforPCBdesignarefoundinApplication

Note 862: HFAN-08.1: Thermal Considerations of QFN

and Other Exposed-Paddle Packages.

The best values for R and C should be found by

C

experimentation, as these values are different for each

application. Note that C must be charged before

C

light output appears from the laser. If a compensation

network is used, minimize inductance in the ground

return. Typical starting values:

Applications Information

Connecting Multiple Outputs

It is possible to connect the outputs together to achieve

a higher output current.

R

C

≈ R to 2 x R (R = Laser Resistance)

L

C

≈ 1/(2G f x R )

VIDEO L

Eye Safety

Specification IEC 825 defines the maximum safe output

of optical devices. This laser driver provides features

that aid compliance with IEC 825. Using this laser driver

alone does not ensure that a product is compliant with

IEC 825. The entire transmitter circuit and component

selections must be considered. Maxim products are

not designed for use as components in systems where

the failure of a Maxim product could create a condition

where human injury may occur.

PCB Layout

Place the lasers as close as possible to the laser driver.

The laser connection should appear as a low-impedance

transmission line. Use wide traces located close to the

ground plane for maximum capacitance. The connection

from OUT_ to the laser should be as short as possible,

ideally < 15mm.

Consider the laser power supply V . Droop on these

A_

supplies reduces the compliance voltage. Use two or

three capacitors to bypass V to ground. Place a small

capacitor as close as possible to the laser to keep the

ground return loop small. A larger capacitor can be

A_

Wafer-Level Packaging (WLP)

Applications Information

For the latest application details on WLP construction,

dimensions, tape carrier information, PCB techniques,

bump-pad layout, and recommended reflow temperature

profile, as well as the latest information on reliability

testing results refer to Application Note 1891: Wafer-

Level Packaging (WLP) and its Applications.

located farther from V . It is best to solder the laser to

the PCB. If a connector is required, minimize inductance.

Inductance > 1nH at OUT_ could cause large ringing.

A_

Laser Driver Thermal Considerations

The circuit is designed to meet specifications with an

operating junction temperature (T ) up to +125NC. The

J

controlling system must be designed to monitor the

Maxim Integrated

40

MAX3601

Laser Driver for Projectors

Table 10. Detailed Register Table (see Table 8)

REGISTER

ADDRESS

DEFAULT

VALUE

BITS

D[7:0]

D[7:5]

D[4:0]

D[7:1]

NAME

DEVID1

DEVID2

—

VALUE

XXXXXXXX

000

FUNCTION

Device ID MSBs

00001110

(Read only)

0x00

0x01

(0x0E)

Device ID LSBs

(0x11)

00010001

(Read only)

000

(Read only)

Reserved

0x02

0x03

Version Identification 1

(0x01)

00001

(Read only)

VER1

—

00001

00000XX

0

00000XX

(Read only)

Reserved

Commercial temperature grade

(0NC to 70NC)

X

D0

TG

(Read only)

Automotive temperature grade

(-40NC to +105NC)

1

D[7:6]

D[5:0]

—

00

Reserved

00

0x04

0x05

TSET

XXXXXX

Temperature alarm setpoint

000000

0000000

(Read only)

D[7:1]

—

TALM

—

0000000

Reserved

0

1

No temperature alarm

0

D0

Temperature alarm exceeded

(Bit clears when read)

(Read only)

00000

(Read only)

D[7:3]

D2

00000

Reserved

0

1

0

1

0

1

OUT3 compliance voltage normal

0

AL3

OUT3 low compliance voltage alarm

(Cleared when read)

(Read only)

0x06

OUT2 compliance voltage normal

0

D1

D0

AL2

AL1

OUT2 low compliance voltage alarm

(Cleared when read)

(Read only)

OUT1 compliance voltage normal

0

OUT1 low compliance voltage alarm

(Cleared when read)

(Read only)

Maxim Integrated

41

MAX3601

Laser Driver for Projectors

Table 10. Detailed Register Table (see Table 8) (continued)

REGISTER

ADDRESS

DEFAULT

VALUE

BITS

D[7:6]

D5

NAME

—

VALUE

FUNCTION

00

Reserved

00

0

Output 3 DAC B disabled

Output 3 DAC B enabled

Output 3 DAC A disabled

Output 3 DAC A enabled

Output 2 DAC B disabled

Output 2 DAC B enabled

Output 2 DAC A disabled

Output 2 DAC A enabled

Output 1 DAC B disabled

Output 1 DAC B enabled

Output 1 DAC A disabled

Output 1 DAC A enabled

Reserved

OEB3

0

1

0

D4

D3

D2

D1

OEA3

OEB2

OEA2

OEB1

0

1

0

0x07

1

0

1

0

1

0

D0

D[7:3]

D2

OEA1

—

0

00000

0

1

00000

0

MARKER input does not affect OUT3

OUT3 disabled when MARKER is high

MARKER input does not affect OUT2

OUT2 disabled when MARKER is high

MARKER input does not affect OUT1

OUT1 disabled when MARKER is high

Reserved

VE3

1

0x08

0

D1

VE2

0

1

0

1

D0

VE1

—

0

D[7:3]

00000

Video demux mode select

(see Table 7)

000

Select Demux A (Power-on default)

001

010

Select Demux B

0x09

D[3:0]

MS

Select Demux C (C1, C2, C3)

Select Demux C (C2, C2, C2)

Select Demux C (C2, C2, C3)

Select Demux C (C2, C3, C3)

Do not use

000

011

100

101

11X

0x0A

0x0B

D[7:0]

D[7:6]

—

00000000

0000000

0

Reserved

00000000

0000000

Reserved

Disable subpixel generator

Enable subpixel generator

Reserved

D0

SP_EN

—

0

1

D[7:3]

D[2:0]

00000

001

Subpixel Programming

See Table 3

0x0C

SP

XXX

Maxim Integrated

42

MAX3601

Laser Driver for Projectors

Table 10. Detailed Register Table (see Table 8) (continued)

REGISTER

ADDRESS

DEFAULT

VALUE

BITS

D[7:3]

D2

NAME

—

VALUE

00000

X

FUNCTION

Reserved

00000

Subpixel tuning.

Do not change from default

SP_T2

1

0x0D

D1

D0

SP_T1

SP_T0

—

X

Do not change from default

Reserved

0

D[7:3]

00000

OUT1 DACA video select (see Table 4)

Video output with zero output pulse-off

(Power-on default)

000

001

010

011

Video output with offset output pulse-off

Offset output with zero output pulse-off

Offset output

0x10

D[2:0]

VSA1

000

Offset output (if video data is present)

with zero output pulse-off

100

101

11X

Zero output

Reserved

D[7:3]

D[2:0]

—

00000

000

OUT1 DACB video select (see Table 5)

Video output with zero output pulse-off

(Power-on default)

000

001

010

011

Video output with offset output pulse-off

Offset output with zero output pulse-off

Offset output

0x11

VSB1

Offset output (if video data is present)

with zero output pulse-off

100

101

Zero output

11X

Zero output

0x12

0x13

0x14

0x15

D[7:0]

GA1

GB1

XXXXXXXX

OUT1 DAC A gain setting

OUT1 DAC B gain setting

OUT1 DAC A offset setting

OUT1 DAC B offset setting

00000000

OSA1

OSB1

OUT1 Pulse-off mask MSBs

(see Figure 9)

0x16

0x17

0x18

0x19

D[7:0]

XXXXXXXX

00000000

POM1

PHM1

OUT1 Pulse-off mask LSBs

OUT1 Pulse-Assist mask MSBs (see

Figure 9)

OUT1 Pulse-off mask LSBs

Maxim Integrated

43

MAX3601

Laser Driver for Projectors

Table 10. Detailed Register Table (see Table 8) (continued)

REGISTER

ADDRESS

DEFAULT

VALUE

BITS

NAME

VALUE

FUNCTION

D[7:2]

—

000000

Reserved

000000

OUT1 pulse-off Assist uses 64I

resistance

00

(Power-on default)

0x1A

0x1B

D[1:0]

PHS1

00

01

10

32I pulse-off Assist resistance

16I pulse-off Assist resistance

8I pulse-off Assist resistance

Reserved

11

D[7:4]

D[3:0]

D[7:3]

—

VSET1

—

0000

OUT1 compliance alarm setpoint

(see Table 6)

XXXX

00000

Reserved

00000

OUT2 DACA video select (see Table 4)

Video output with zero output pulse-off

(Power-on default)

000

001

010

011

Video output with offset output pulse-off

Offset output with zero output pulse-off

Offset output

0x20

D[2:0]

VSA2

000

Offset output (if video data is present)

with zero output pulse-off

100

101

11X

Zero output

Reserved

D[7:3]

D[2:0]

—

00000

000

OUT2 DACB video select (see Table 5)

Video output with zero output pulse-off

(Power-on default)

000

001

010

011

Video output with offset output pulse-off

Offset output with zero output pulse-off

Offset output

0x21

VSB2

Offset output (if video data is present)

with zero output pulse-off

100

101

Zero output

11X

Zero output

0x22

0x23

0x24

0x25

D[7:0]

GA2

GB2

XXXXXXXX

OUT2 DAC A gain setting

OUT2 DAC B gain setting

OUT2 DAC A offset setting

OUT2 DAC B offset setting

00000000

OSA2

OSB2

OUT2 pulse-off mask MSBs (see Figure

9)

0x26

0x27

D[7:0]

XXXXXXXX

00000000

POM2

OUT2 pulse-off mask LSBs

Maxim Integrated

44

MAX3601

Laser Driver for Projectors

Table 10. Detailed Register Table (see Table 8) (continued)

REGISTER

ADDRESS

DEFAULT

VALUE

BITS

NAME

VALUE

FUNCTION

OUT2 pulse-Assist mask MSBs (see

Figure 9)

0x28

0x29

D[7:0]

XXXXXXXX

00000000

PHM2

—

D[7:0]

D[7:2]

XXXXXXXX

000000

OUT2 pulse-off mask LSBs

Reserved

00000000

000000

OUT2 pulse off Assist uses 64I

resistance

00

(Power-on default)

0x2A

0x2B

D[1:0]

PHS2

00

01

10

32I pulse-off Assist resistance

16I pulse-off Assist resistance

8I pulse-off Assist resistance

Reserved

11

D[7:4]

D[3:0]

D[7:3]

—

VSET2

—

0000

OUT2 compliance alarm setpoint

(see Table 6)

XXXX

00000

Reserved

00000

OUT3 DACA video select (see Table 4)

Video output with zero output pulse-off

(Power-on default)

000

001

010

011

Video output with offset output pulse-off

Offset output with zero output pulse-off

Offset output

0x30

D[2:0]

D[7:3]

D[2:0]

VSA3

000

00000

000

Offset output (if video data is present)

with zero output pulse-off

100

101

11X

Zero output

Reserved

—

00000

OUT3 DACB video select (see Table 5)

Video output with zero output pulse-off

(Power-on default)

000

001

010

011

Video output with offset output pulse-off

Offset output with zero output pulse-off

Offset output

0x31

VSB3

Offset output (if video data is present)

with zero output pulse-off

100

101

Zero output

11X

Zero output

0x32

0x33

0x34

0x35

D[7:0]

GA3

GB3

XXXXXXXX

OUT3 DAC A gain setting

OUT3 DAC B gain setting

OUT3 DAC A offset setting

OUT3 DAC B offset setting

00000000

OSA3

OSB3

Maxim Integrated

45

MAX3601

Laser Driver for Projectors

Table 10. Detailed Register Table (see Table 8) (continued)

REGISTER

ADDRESS

DEFAULT

VALUE

BITS

NAME

VALUE

FUNCTION

OUT3 pulse-off mask MSBs (see Figure

9)

0x36

0x37

0x38

0x39

D[7:0]

XXXXXXXX

00000000

POM3

OUT3 pulse-off mask LSBs

OUT3 pulse-Assist mask MSBs (see

Figure 9)

PHM3

—

D[7:0]

D[7:2]

XXXXXXXX

000000

OUT3 pulse-off mask LSBs

Reserved

00000000

000000

OUT3 pulse off Assist uses 64I

resistance

00

(Power-on default)

0x3A

0x3B

D[1:0]

PHS3

00

01

10

32I pulse-off Assist resistance

16I pulse-off Assist resistance

8I pulse-off Assist resistance

Reserved

11

D[7:4]

D[3:0]

—

0000

OUT3 compliance alarm setpoint

(see Table 6)

VSET3

XXXX

0000

(Read only)

D[7:4]

D[3:0]

D[7:0]

D[7:4]

D3

—

DG1

Reserved

0x40

0x41

Diagnostic Register 1. Mirrors digital

video input MSBs (D[11:8])

0000

(Read only)

XXXX

Diagnostic Register 2. Mirrors digital

video input LSBs (D[7:0])

00000000

(Read only)

DG2

XXXXXXXX

0000

(Read only)

—

Reserved

0

1

Device in power-on-reset condition

Normal Operation

0

PORB

DCLK

MARKER

EN_MAIN

(Read only)

0

0x42

D2

X

Mirrors digital video input clock

Mirrors MARKER input

(Read only)

0

D1

(Read only)

0

D0

Mirrors EN_MAIN input

(Read only)

Maxim Integrated

46

MAX3601

Laser Driver for Projectors

Table 10. Detailed Register Table (see Table 8) (continued)

REGISTER

ADDRESS

DEFAULT

VALUE

BITS

D7

D6

D5

D4

D3

D2

D1

NAME

PH3_EN

PH2_EN

PH1_EN

CMPS3

CMPS2

CMPS1

TS_EN

VALUE

FUNCTION

0

OUT3 pulse-Assist disabled

OUT3 pulse-Assist enabled

OUT2 pulse-Assist disabled

OUT2 pulse-Assist enabled

OUT1 pulse-Assist disabled

OUT1 pulse-Assist enabled

OUT3 compliance sensor disabled

OUT3 compliance sensor enabled

OUT2 compliance sensor disabled

OUT2 compliance sensor enabled

OUT1 compliance sensor disabled

OUT1 compliance sensor enabled

Temperature sensor disabled

Temperature sensor enabled

Master bias voltage generator disabled

Master bias voltage generator enabled

Reserved

0

(Read only)

1

0

(Read only)

1

0

(Read only)

1

0

(Read only)

1

0x43

0

(Read only)

1

0

(Read only)

1

0

(Read only)

1

0

D0

BIAS_EN

—

(Read only)

1

0000000

0

D[7:1]

0000000

0

Normal operation

0x44

D0

RST

Reset the device. bit always reads as

a zero

1

0x45

0x46

D[7:0]

D[7:5]

—

00000000

000

Reserved

00000000

000

OUT1 random pulse-off events

synchronized to other outputs with

POC_[4] = ‘0’

0

D4

POC1[4]

0

OUT1 random pulse-off events are

unsynchronized (Table 3)

1

0

1

0x47

OUT1 pulse-off events are random

D3

POC1[3]

0

OUT1 pulse-off events occur every

other pixel (Table 2)

OUT1 pulse-off duty cycle configuration

(Table 2)

D[2:0]

POC1[2:0]

XXX

Maxim Integrated

47

MAX3601

Laser Driver for Projectors

Table 10. Detailed Register Table (see Table 8) (continued)

REGISTER

ADDRESS

DEFAULT

VALUE

BITS

NAME

VALUE

FUNCTION

D[7:5]

—

000

Reserved

000

OUT2 random pulse-off events

synchronized to other outputs with

POC_[4] = ‘0’

0

D4

D3

POC1[4]

POC1[3]

0

OUT2 random pulse-off events are

unsynchronized (Table 3)

1

0

1

0x48

OUT2 pulse-off events are random

0

OUT2 pulse-off events occur every

other pixel (Table 2)

OUT2 pulse-off duty cycle configuration

(Table 2)

D[2:0]

D[7:5]

POC1[2:0]

—

XXX

000

0

Reserved

000

OUT3 random pulse-off events

synchronized to other outputs with

POC_[4] = ‘0’

0

D4

POC1[4]

0

OUT3 random pulse-off events are

unsynchronized (Table 3)

1

0

1

0x49

OUT3 pulse-off events are random

D3

POC1[3]

0

OUT3 pulse-off events occur every

other pixel (Table 2)

OUT3 pulse-off duty cycle configuration

(Table 2)

D[2:0]

POC1[2:0]

XXX

Maxim Integrated

48

MAX3601

Laser Driver for Projectors

Typical Operating Circuits

RGB LASER PROJECTOR

VIDEO

PROCESSOR

MAX3601

+1.8V

+3.3V

C

F

V

AVDD

DVDD

AVCC

DVCC

DD

+V

RED

390I

10µF

RED

OUT1

OUT2

OUT3

DIO/SDA

CS

SERIAL DATA

CHIP SELECT

SERIAL CLOCK

ENABLE

C

S1

C

S2

C

S3

0.01µF

R

S1

+V

GREEN

10µF

GREEN

CLK /SCL

EN_MAIN

MARKER

D0:D11

0.01µF

S2

VIDEO MARK

VIDEO DATA

DATA CLOCK

+V

BLUE

10µF

12

BLUE

0.01µF

DCLK

S3

TESTA

TESTB

TESTC

AGND

DGND

Maxim Integrated

49

MAX3601

Laser Driver for Projectors

Typical Operating Circuits (continued)

HIGH-CURRENT LASER DRIVER

VIDEO

PROCESSOR

MAX3601

+3.3V

+1.8V

DVCC

AVCC

AVDD

DVDD

TESTA

TESTB

TESTC

AGND

DGND

CHIP SELECT1

CS

DIO/SDA

CLK/SCL

EN_MAIN

MARKER

D0:D11

DCLK

OUT1

OUT2

OUT3

+V

L

LASER

MAX3601

DIO/SDA

SERIAL DATA

CHIP SELECT2

SERIAL CLOCK

ENABLE

OUT1

OUT2

OUT3

CS

CLK/SCL

EN_MAIN

MARKER

D0:D11

DCLK

VIDEO MARK

VIDEO DATA

DATA CLOCK

12

TESTA

TESTB

TESTC

AGND

+1.8V

+3.3V

AVDD

DVDD

DVCC

AVCC

DGND

Ordering Information

Package Information

For the latest package outline information and land patterns (foot-

prints), go to www.maximintegrated.com/packages. Note that a

“+”, “#”, or “-” in the package code indicates RoHS status only.

Package drawings may show a different suffix character, but the

drawing pertains to the package regardless of RoHS status.

PART

TEMP RANGE

-40NC to +105NC

0NC to +70NC

PIN-PACKAGE

40 TQFN-EP*

42 WLP

MAX3601GTL+

MAX3601CWO+

+Denotes a lead (Pb)-free/RoHS-compliant package.

*EP = Exposed pad.

PACKAGE

TYPE

PACKAGE

CODE

OUTLINE

NO.

LAND

PATTERN NO.

40 TQFN-EP

T4055N+1

21-0140

90-0103

Refer to

Application

Note 1891

42 WLP

W423E3+1

21-0440

Maxim Integrated

50

MAX3601

Laser Driver for Projectors

Revision History

REVISION REVISION

PAGES

DESCRIPTION

CHANGED

NUMBER

DATE

0

9/12

Initial release

—

Updated the Electrical Characteristics table for I

and I

, Current at

DVCC_G2B

AVCC

1

1/13

OUT parameter, t , and t ; removed future status from the TQFN package in the

7−10, 50

H

RZ

Ordering Information table

2

3

5/13

3/15

Updated SDA Hold Time in Electrical Characteristics table, Table 2, and Figure 10

10, 25, 26

6, 39

Updated the Absolute Maximum Ratings and Supply Filter section to meet customer

requirements.

Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent

licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and

max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.

Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000

51

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2015 Maxim Integrated Products, Inc.

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型号：	MAX3601_V01
厂家：	MAXIM INTEGRATED PRODUCTS
描述：	Laser Driver for Projectors
文件：	总51页 (文件大小：1697K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

MAX3601_V01 [MAXIM]

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