MAX17103EVKIT+ [MAXIM]

1.2MHz Step-Up Switching Frequency;


型号：	MAX17103EVKIT+
厂家：	MAXIM INTEGRATED PRODUCTS
描述：	1.2MHz Step-Up Switching Frequency
文件：	总9页 (文件大小：235K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

19-4551; Rev 0; 4/09

MAX17103 Evaluation Kit

Evluates:MAX7103

General Description

Features

The MAX17103 evaluation kit (EV kit) is a fully assem-

bled and tested surface-mount PCB that provides the

voltages and features required for active-matrix, thin-

film transistor (TFT), liquid-crystal display (LCD) appli-

cations. The EV kit contains a high-performance step-

up regulator, a 350mA low-dropout linear regulator, a

high-speed operational amplifier (op amp), a positive

charge pump for the TFT gate-on supply, a negative

charge pump with a negative linear regulator controller

for the TFT gate-off supply, and a high-voltage, level-

shifting scan driver.

o +2.3V to +5.5V Input Range

o Output Voltages

+8.5V Output at 250mA from a +2.7V Input

(Step-Up Switching Regulator)

+23V Output at 20mA (Positive Charge Pump)

-6V Output at 20mA (Negative Charge Pump

with Negative Linear Regulator Controller)

+4.25V High-Current Op-Amp Output

( 200mA (tꢀp))

o Resistor-Adjustable Switching-Regulator, Op-Amp

The EV kit operates from a DC supply voltage of +2.3V

to +5.5V. The step-up switching regulator is configured

for a +8.5V output providing at least 250mA from a

+2.7V input. The positive charge pump is configured to

provide a +23V output providing at least 20mA. The

negative charge pump with negative linear controller is

configured to provide a -6V output providing at least

20mA. The op amp is configured for +4.25V and has a

200mA (typ) output short-circuit current. The high-volt-

age, level-shifting scan driver buffers three logic inputs

and shifts them to a desired level to drive TFT-LCD row

logic.

Output, VGL, and LDOO Voltages

o Three High-Voltage Level-Shifting Buffers

o 1.2MHz Step-Up Switching Frequencꢀ

o Lead(Pb)-Free and RoHS Compliant

o Fullꢀ Assembled and Tested

Ordering Information

PART

TYPE

MAX17103EVKIT+

EV Kit

+Denotes lead(Pb)-free and RoHS compliant.

Component List

DESIGNATION QTY

DESCRIPTION

DESIGNATION QTY

DESCRIPTION

10µF 10ꢀ, 10V X5R ceramic

capacitor (0805)

TDK C2012X5R1A106K

Murata GRM21BR61A106K

1µF 10ꢀ, 16V X5R ceramic

capacitors (0603)

Murata GRM188R61C105K

TDK C1608X5R1C105K

C2, C3, C4

C12, C13, C14

1000pF 10ꢀ, 50V X7R ceramic

capacitor (0603)

Murata GRM188R71H102K

TDK C1608X7R1H102K

10µF 10ꢀ, 16V X5R ceramic

capacitors (1206)

Murata GRM31CR61C106K

TDK C3216X5R1C106K

C19

C20

0.22µF 10ꢀ, 50V X7R ceramic

capacitor (0805)

Murata GRM21BR71H224K

TDK C2012X7R1H224K

0.33µF 10ꢀ, 10V X5R ceramic

capacitor (0603)

Murata GRM188R61A334K

TDK C1608X5R1A334K

0.1µF 10ꢀ, 50V X7R ceramic

capacitors (0603)

Murata GRM188R71H104K

TDK C1608X7R1H104K

C26, C27, C28,

C34

Not installed, ceramic capacitors

(0603)

C6–C11, C15,

C16, C17, C21

3300pF 10ꢀ, 50V X7R ceramic

capacitors (0603)

Murata GRM188R71H332K

TDK C1608X8R1H332K

C29, C30, C31

0.22µF 10ꢀ, 25V X5R ceramic

capacitors (0603)

Murata GRM188R61E224K

TDK C1608X5R1E224K

C18, C22, C33

________________________________________________________________ Maxim Integrated Products

For pricing, deliverꢀ, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

MAX17103 Evaluation Kit

Component List (continued)

DESIGNATION QTY

DESCRIPTION

DESIGNATION QTY

DESCRIPTION

1.2kΩ 5ꢀ resistor (0603)

1µF 10ꢀ, 25V X5R ceramic

capacitor (0805)

Murata GRM21BR71E105K

TDK C2012X5R1E105K

R7, R27, R28,

R29

Not installed, resistors—shorted by

PC trace (0603)

C32

62kΩ 5ꢀ resistor (0603)

51.1kΩ 1ꢀ resistor (0603)

49.9kΩ 1ꢀ resistors (0603)

82.5kΩ 1ꢀ resistor (0603)

110kΩ 1ꢀ resistor (0603)

2.2kΩ 5ꢀ resistor (0603)

6.81kΩ 1ꢀ resistor (0603)

243kΩ 1ꢀ resistor (0603)

1A, 30V Schottky diode (S-Flat)

Central Semi CMMSH1-40 LEAD FREE

Nihon EP10QY03

R10, R26

R11

Toshiba CRS02(TE85L,Q,M)

R12

200mA, 100V dual diodes (SOT23)

Fairchild MMBD4148SE

(Top Mark: D4)

Central Semi CMPD7000+

(Top Mark: C5C)

R13

D2, D3, D4

JU1

R14

R15

R16–R21,

R31–R36

3-pin header

12 200Ω 1ꢀ resistors (1206)

LX, POS, QS,

REF, VDET

PCB mini test points

R22–R25

R30

100kΩ 5ꢀ resistors (0603)

Not installed, resistor (0805)

10µH, 1.85A, 74.4mΩ inductor

(6mm x 6mm x 3mm)

Sumida CDRH5D28RHPNP-100M

Evluates:MAX7103

4-position low-profile surface-mount

DIP switch

SW1

Internal-switch boost regulator

(32 TQFN-EP*)

Maxim MAX17103ETJ+

npn surface-mount transistor (SOT23)

Diodes, Inc. MMBT3904

Fairchild MMBT3904

—

Shunt

102kΩ 1ꢀ resistor (0603)

17.4kΩ 1ꢀ resistor (0603)

56.2kΩ 1ꢀ resistors (0603)

PCB: MAX17103 Evaluation Kit+

R3, R4, R5

*EP = Exposed pad.

Component Suppliers

SUPPLIER

PHONE

WEBSITE

Central Semiconductor Corp.

Diodes, Inc.

631-435-1110

805-446-4800

888-522-5372

770-436-1300

847-843-7500

847-545-6700

847-803-6100

949-623-2900

www.centralsemi.com

www.diodes.com

Fairchild Semiconductor

Murata Electronics North America, Inc.

Nihon Inter Electronics Corp.

Sumida Corp.

www.fairchildsemi.com

www.murata-northamerica.com

www.niec.co.jp

www.sumida.com

TDK Corp.

www.component.tdk.com

www.toshiba.com/taec

Toshiba America Electronic Components, Inc.

Note: Indicate that you are using the MAX17103 when contacting these component suppliers.

_______________________________________________________________________________________

MAX17103 Evaluation Kit

Evluates:MAX7103

The GHON consists of two positive charge-pump

Quick Start

Recommended Equipment

2.3V to 5.5V, 2A DC power supply

Voltmeters

stages to generate approximately +23V and provides

up to 20mA. The VGL consists of a single negative

charge-pump stage regulated with the negative linear

controller to generate approximately -6V and provides

up to 20mA. Loading GHON and VGL reduces the

available VMAIN current proportionally.

•

Procedure

The MAX17103 EV kit is fully assembled and tested.

Follow the steps below to verify board operation.

Caution: Do not turn on the power supplꢀ until all

connections are completed.

The op-amp output (VOUT) is set to +4.25V and sources

or sinks current up to 200mA (typ). The output can be

reconfigured to other voltages with voltage-divider resis-

tors (see the Output-Voltage Selection section).

1) Verify that a shunt is installed across pins 1-2 of

jumper JU1.

The three logic-level to high-voltage level and shifting

buffers can buffer three logic inputs (CK, XCK, and ST)

and shift them to the desired output levels (CKH,

XCKH, and STH) to drive TFT-LCD row logic. The driver

outputs swing between their power-supply rails (GHON

and VGL) according to the input logic levels on the

block’s inputs (CK, XCK, CS, and ST), and by internal

logic used during power-up and power-down. For fur-

ther details, refer to the High-Voltage Level-Shifting

Scan Driver section in the MAX17103 IC data sheet.

2) Verify that SW1 4-position DIP switches are in the

on position.

3) Connect the positive terminal of the power supply

to the VIN pad. Connect the negative terminal of

the power supply to the PGND pad. Set VIN to +3V.

4) Turn on the power supply and verify that the step-

up switching regulator output (VMAIN) is +8.5V.

5) Verify that the gate-on supply (GHON) is approxi-

mately +23V.

The four switches within SW1 are used to select logic

levels on CK, CS, XCK, and ST for testing purposes.

Set each switch open when driving CK, CS, XCK, and

ST with external logic.

6) Verify that the gate-off supply (VGL) is approxi-

mately -6V.

7) Verify that the output of the high-speed op amp

(VOUT) is approximately +4.25V.

Jumper Selection (JU1)

The MAX17103 EV kit incorporates jumper JU1 to con-

trol the chip enable control. See Table 1 for jumper JU1

functions.

8) Verify that the outputs of the high-voltage level-

shifting buffers are approximately +23V (= GHON).

Detailed Description of Hardware

Output-Voltage Selection

The MAX17103 EV kit contains a step-up switching reg-

ulator, a positive two-stage charge pump, a negative

single-stage charge pump with a negative linear regu-

lator controller, a high-speed op amp, and three high-

voltage level-shifting buffers for scan-driver applica-

tions. The EV kit operates from a DC power supply

between +2.3V and +5.5V.

Step-Up Switching-Regulator

Output Voltage (VMAIN)

The MAX17103 EV kit’s step-up switching-regulator out-

put (VMAIN) is set to +8.5V by feedback resistors R1

and R2. To generate output voltages other than +8.5V

(up to +15V), select different external voltage-divider

resistors R1 and R2. For instructions on selecting the

step-up switching regulator feedback divider resistors

for other output voltages, refer to the Output-Voltage

Selection section in the MAX17103 IC data sheet.

As configured, the step-up switching regulator (VMAIN)

generates a +8.5V output and provides at least 250mA

from a +2.7V input. The step-up switching-regulator

output voltage can be adjusted up to +15V with differ-

ent feedback resistors (see the Output-Voltage

Selection section).

Table 1. Jumper JU1 Functions

SHUNT

POSITION

EV KIT

OUTPUTS

ENA PIN

ENA connected to LDOO

through R8

Outputs enabled

(VMAIN = +8.5V)

1-2*

ENA connected to GND

through R8

Outputs disabled

(VMAIN ~ VIN)

2-3

*Default position.

_______________________________________________________________________________________

MAX17103 Evaluation Kit

Note that changing the VMAIN voltage setting changes

the GHON and VGL charge-pump output voltages. The

voltage range of VGL is limited to -15V. The voltage

range of GHON is limited to +35V. The voltage differ-

ence between GHON and VGL should not exceed +40V.

If VMAIN is set for more than +11V, disconnect the posi-

tive and negative charge pump with the negative linear

regulator controller by cutting the R29 and R28 traces.

Apply power to GHON and VGL by connecting external

power supplies to their respective pads.

Op-Amp Output Voltage (VOUT)

The MAX17103 EV kit’s op amp is configured internally

as a unity gain buffer. The voltage at the noninverting

input (POS) is set to half of VMAIN by voltage-divider

resistors R4 and R5. To set VOUT to other voltages (up

to VMAIN), select different divider resistors according

to the following equation:

VMAIN

VOUT

⎛

⎞

⎠

−

R4 = R5 ×

⎟

⎜

⎝

Evluates:MAX7103

_______________________________________________________________________________________

MAX17103 Evaluation Kit

Evluates:MAX7103

Figure 1a. MAX17103 EV Kit Schematic (Sheet 1 of 2)

_______________________________________________________________________________________

MAX17103 Evaluation Kit

Evluates:MAX7103

Figure 1b. MAX17103 EV Kit Schematic (Sheet 2 of 2)

_______________________________________________________________________________________

MAX17103 Evaluation Kit

Evluates:MAX7103

Figure 2. MAX17103 EV Kit Component Placement Guide—Component Side

_______________________________________________________________________________________

MAX17103 Evaluation Kit

Evluates:MAX7103

Figure 3. MAX17103 EV Kit PCB Layout—Component Side

_______________________________________________________________________________________

MAX17103 Evaluation Kit

Evluates:MAX7103

Figure 4. MAX17103 EV Kit PCB Layout—Solder Side

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

implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 9

Maxim is a registered trademark of Maxim Integrated Products, Inc.

SPRINGER

MAX17103EVKIT+ [MAXIM]

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