BD9204F [ROHM]

Silicon Monolithic Integrated Circuit; 硅单片集成电路


型号：	BD9204F
厂家：	ROHM
描述：	Silicon Monolithic Integrated Circuit 硅单片集成电路
文件：	总5页 (文件大小：181K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

1/4

STRUCTURE

PRODUCT

Silicon Monolithic Integrated Circuit

White LED Driver for LCD Backlights

TYPE

BD9204F

FEATURE

・ Input voltage range 7V-15V

・ Built-in 3ch boost DCDC converter (current mode)

・ OVP, SCP, OPEN protection

・ Analog dimming, PWM dimming enable

・ Under voltage lock out (UVLO)

・ Fail pin annotate abnormal state

・ SOP28 package

○ ABSOLUTE MAXIMUM RATINGS (Ta=25℃)

PARAMETER

Symbol

Limit

Unit

Power Supply Voltage

Vccmax

℃

Power Dissipation

750 *1

Operating Temperature Range

Storage Temperature Range

Topr

Tstg

-40～+85

-55～+150

℃

*1 Pd derated at 6.0 mW/℃ for temperature above Ta=25℃,

mounted on 70mm×70mm×1.6mm 1 layer(cupper area 70mm×70mm)glass-epoxy PCB.

This product is not designed for protection against radioactive rays.

○ OPERATING CONDITIONS (Ta=25℃)

PARAMETER

Power Supply Voltage

Symbol

VCC

Limit

Unit

7～15

REV. Ａ

2/4

○ELECTRICAL CHARACTERISTICS(unless otherwise specified VCC=12V, Ta=25℃)

Limit

TYP.

PARAMETER

Symbol

UNIT

Conditions

MIN.

MAX.

【Total Current Consumption】

Circuit Current

ICC

IST

－

4.7

STB=H, SEL=L, PWM=L

STB=L

Standby Current

【VREG】

VREG Output Voltage

VREG

IREG

4.8

5.0

3.6

5.2

IO=0mA, CREG=1uF

VREG=5.25V

(input externally)

VREG input current

2.16

5.04

STB=H, SEL=L, PWM=L

【Boost Driving Pin】

ION=-10mA

and internal power supply

Between output N

N1, N2, N3 resistance1

RONH

RONL

4.0

2.0

N1, N2, N3 resistance2

【Error-Amp block】

ILED threshold voltage

COMP1,2,3 sink current

COMP1,2,3 source current

【CT Oscillator block】

Oscillation Frequency

【SOFT START】

ION=10mA

VFB

(-2%)

1.5

100

(+2%)

VREF=1.5V

VLED=2.0V

VLED=1.0V

ICOMPSI

ICOMPSO

FRT

270

300

330

kHz

RT=160kΩ

SS source current

ISS

1.0

5.0

SS END pin voltage

【OVP and SCP detection】

Over Voltage Protection voltage

OVP hysteresis

VSS

VOVP

VOVPHYS

VSCP

1.65

2.0

2.35

Sweep up

0.05

0.20

0.05

0.35

Sweep down

Sweep up

Short Circuit Protection voltage

SCP hysteresis

VSCPHYS

【Fail pin】

Low level voltage (normal state)

Leak current (abnormal state)

CP pin charge current

CP detect voltage

VFAIL

ILFAIL

ICP

0.2

0.5

IOFAIL=1mA

VOFAIL=4V

VCP=0V

VCP

2.0

【SEL pin】

Input Low voltage

VSELL

VSELM

VSELH

-0.3

1.6

4.2

0.8

3.0

CH1,CH2,CH3=enable

CH1,CH2,=enable

CH1=enable

Input Middle voltage

Input High voltage

【STB pin】

Input Low voltage

VSTBYL

VSTBYH

-0.3

2.0

0.8

Input High voltage

【PWM pin】

Input Low voltage

VPWML

VPWMH

-0.3

3.0

1.2

Input High voltage

(This product is not designed for protection against radioactive rays.)

REV. Ａ

3/4

VIN

VCC

GND

○ BLOCK DIAGRAM

BD9204F

ADIM

VCC

OCP1

STB

PDIM

FAIL

PGND

ILED1

GND

STB

VREF

PWM

SEL

COOMVPP11

GND1

VIN

FB1

COMP1

STB

VREF

PDIM

SEL

OCP2

ILED2

PGND

FAIL

OVP2

COMP2

FAIL

GND1

VIN

VREG

VREF4V

FB2

COMP2

REG

FB3

COMP3

OCP3

ILED3

PGND

VIN

PGND

OVP3

COMP3

UVLO

GND1

○PACKEGE, MARKING SPECIFICATION

SOP-28

BD9204F

Lot No.

○ PIN No. & PIN NAME

No. name

function

No.

name

function

VREF analog dimming signal input

FAIL abnormal state output

ILED1 CH1 current signal feedback input

16 COMP1 CH1 error amplifier output

17 COMP2 CH2 error amplifier ouput

18 COMP3 CH3 error amplifier output

soft start setting

oscillation frequency setting

OCP3 CH3 DCDC over current protection

SEL

power on channel select input

PGND power ground pin

UVLO

the voltage monitor input for UVLO

OCP2 CH2 DCDC over current protection

N2 CH2 DCDC switching output

CH3 DCDC switching output

GND

PWM

OVP1

OVP2

OVP3

analog ground pin

PWM dimming signal input

CH1 boost voltage monitor input

CH2 boost voltage monitor input

CH3 boost voltage monitor input

latch OFF timer setting

10 OCP1 CH1 DCDC over current protection

CH1 DCDC switching output

ON/OFF logic input

STB

VCC Power pin

ILED3 CH3 current signal feedback input

ILED2 CH2 current signal feedback input

14 VREG internal power supply output

REV. Ａ

4/4

○ Operation Notes

1) Absolute maximum ratings

An excess in the absolute maximum rating, such as supply voltage, temperature range of operating conditions, etc., can break down

the devices, thus making impossible to identify breaking mode, such as a short circuit or an open circuit. If any over rated values will

expect to exceed the absolute maximum ratings, consider adding circuit protection devices, such as fuses.

2) GND voltage

The potential of GND pin must be minimum potential in all condition. As an exception, the circuit design allows voltages up to -0.3 V

to be applied to the ICT pin.

3) Thermal design

Use a thermal design that allows for a sufficient margin in light of the power dissipation (Pd) in actual operating conditions.

4) Inter-pin shorts and mounting errors

Use caution when positioning the IC for mounting on printed circuit boards. The IC may be damaged if there is any connection error or

if pins are shorted together.

5) Actions in strong electromagnetic field

Use caution when using the IC in the presence of a strong electromagnetic field as doing so may cause the IC to malfunction.

6) Mutual impedance

Power supply and ground wiring should reflect consideration of the need to lower mutual impedance and minimize ripple

as much as possible (by making wiring as short and thick as possible or rejecting ripple by incorporating inductance and capacitance).

7) External components

The input DC voltage or DC current or temperature of external components such as inductor or capacitor affects its electrical character.

The ripple current through capacitor over regulation also affect to its reliability. External components should be chosen and made sure,

considering the margins in all operational condition.

8) Regarding input pin of the IC

This monolithic IC contains P+ isolation and P substrate layers between adjacent elements in order to keep them isolated. P-N junctions

are formed at the intersection of these P layers with the N layers of other elements, creating a parasitic diode or transistor. For example,

as shown in the figures below, the relation between each potential is as follows:

When GND > Pin A and GND > Pin B, the P-N junction operates as a parasitic diode.

When GND > Pin B, the P-N junction operates as a parasitic transistor.

Parasitic diodes can occur inevitable in the structure of the IC. The operation of parasitic diodes can result in mutual interference

among circuits, operational faults, or physical damage. Accordingly, methods by which parasitic diodes operate, such as applying

a voltage that is lower than the GND (P substrate) voltage to an input pin, should not be used. Although the circuit design allows voltages

up to -0.3 V to be applied to the ICT pin, voltages lower than this may cause the behavior described above. Use caution when designing

the circuit.

Transistor (NPN)

Resistor

(Pin A)

(Pin B)

GND

P⁺

P substrate

Parasitic elements

(Pin B)

Parasitic elements

(Pin A)

GND

Parasitic elements

Other Adjacent Elements

GND

Simplified structure of a Monolithic IC

Parasitic elements

REV. Ａ

Notice

N o t e s

No copying or reproduction of this document, in part or in whole, is permitted without the

consent of ROHM Co.,Ltd.

The content speciﬁed herein is subject to change for improvement without notice.

The content speciﬁed herein is for the purpose of introducing ROHM's products (hereinafter

"Products"). If you wish to use any such Product, please be sure to refer to the speciﬁcations,

which can be obtained from ROHM upon request.

Examples of application circuits, circuit constants and any other information contained herein

illustrate the standard usage and operations of the Products. The peripheral conditions must

be taken into account when designing circuits for mass production.

Great care was taken in ensuring the accuracy of the information speciﬁed in this document.

However, should you incur any damage arising from any inaccuracy or misprint of such

information, ROHM shall bear no responsibility for such damage.

The technical information speciﬁed herein is intended only to show the typical functions of and

examples of application circuits for the Products. ROHM does not grant you, explicitly or

implicitly, any license to use or exercise intellectual property or other rights held by ROHM and

other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the

use of such technical information.

The Products speciﬁed in this document are intended to be used with general-use electronic

equipment or devices (such as audio visual equipment, ofﬁce-automation equipment, commu-

nication devices, electronic appliances and amusement devices).

The Products speciﬁed in this document are not designed to be radiation tolerant.

While ROHM always makes efforts to enhance the quality and reliability of its Products, a

Product may fail or malfunction for a variety of reasons.

Please be sure to implement in your equipment using the Products safety measures to guard

against the possibility of physical injury, ﬁre or any other damage caused in the event of the

failure of any Product, such as derating, redundancy, ﬁre control and fail-safe designs. ROHM

shall bear no responsibility whatsoever for your use of any Product outside of the prescribed

scope or not in accordance with the instruction manual.

The Products are not designed or manufactured to be used with any equipment, device or

system which requires an extremely high level of reliability the failure or malfunction of which

may result in a direct threat to human life or create a risk of human injury (such as a medical

instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel-

controller or other safety device). ROHM shall bear no responsibility in any way for use of any

of the Products for the above special purposes. If a Product is intended to be used for any

such special purpose, please contact a ROHM sales representative before purchasing.

If you intend to export or ship overseas any Product or technology speciﬁed herein that may

be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to

obtain a license or permit under the Law.

Thank you for your accessing to ROHM product informations.

More detail product informations and catalogs are available, please contact us.

ROHM Customer Support System

http://www.rohm.com/contact/

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R1010

BD9204F [ROHM]

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