BD9203EFV [ROHM]

Silicon Monolithic Integrated Circuit; 硅单片集成电路


型号：	BD9203EFV
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：184K)
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 with step-up DC/DC controller

TYPE

BD9203EFV

FEATURE

・

6CH LED current driver up to 150mA/CH built-in *2

Over voltage protection (OVP), Short circuit protection (SCP), LED open and short detection

Step-up DC/DC controller built-in

PWM and DC Dimming

Programmable timer latch and soft-start period by external capacitor

Over voltage protection (OVP), Short current protection (SCP), LED open and short detection

Under voltage lock out (UVLO)

・ HTSSOP-B28 package

○ ABSOLUTE MAXIMUM RATINGS (Ta=25℃)

PARAMETER

Symbol

VCC

Limit

Unit

Power Supply Voltage

VREF5V

STB

STB Voltage

LED Output Voltage

FAIL Output Voltage

LED1～6

FAIL

SEL, UVLO, PWM1, PWM2, RT,

SS, SLOPE, ISET, VREF,

Pin Voltage

CP, FB, OVP, CS

Power Dissipation

3.30 *1

-40～+85

-55～+150

150 *2

Operating Temperature Range

Storage Temperature Range

LED Maximum Current

Topr

Tstg

ILED

℃

*1 Pd derated at 26.4 mW/℃ for temperature above Ta=25℃,

mounted on 70mm×70mm×1.6mm 2 layer(cupper area 70mm×70mm)glass-epoxy PCB.

*2 This is the constant current value per 1ch. Please perform setting of the constant current value

in the range that is not beyond a value of Pd.

This product is not designed for protection against radioactive rays.

○ OPERATING CONDITIONS (Ta=25℃)

PARAMETER

Power Supply Voltage

Symbol

VCC

Limit

Unit

9～35

CT Oscillation Frequency Range

VREF input voltage range

FCT

100～1000

kHz

VREF

0～VREF5V

REV. Ａ

2/4

○ ELECTRICAL CHARACTERISTICS(unless otherwise specified VCC=24V, Ta=25℃)

Limit

TYP.

PARAMETER

Symbol

UNIT

Conditions

MIN.

MAX.

【Total Current Consumption】

STB=3V, LED1～6=ON,

RT=100kΩ

Circuit Current

ICC

IST

－

Standby Current

STB=0V

【VREF5V】

VREF5V Voltage

VREF5

IREF5

4.9

5.0

5.1

IO=0mA

VREF5V source current

【Switching block】

N source resistance

－

RONH

RONL

ION=-10mA

ION=10mA

N sink resistance

3.4

【SOFT START】

SS source current

ISS

-2.0

3.8

-1.0

4.0

-0.5

4.2

SS END pin voltage

VSS

SS=SWEEP UP

【Error-Amp block】

LED control voltage

FB sink current

VLED

0.65

0.75

100

0.85

200

-40

IFBSINK

LED=2.0V, VFB=1.0V

LED=0V, VFB=1.0V

FB source current

【CT Oscillator block】

Oscillation Frequency

RT pin output voltage

SLOPE pin output voltage

MAX DUTY

IFBSOURCE

-200

-100

FCT

VRT

500

1.05

600

1.5

700

1.95

kHz

RT=100kΩ

VSLOPE

DMAX

【OVP】

Over Voltage Protection voltage

OVP hysterisis

VOVP

VOVPHYS

FBOVP

3.8

100

3.5

4.0

200

3.6

4.2

400

3.7

VOVP=SWEEP UP

VOVP=SWEEP DOWN

PWM1, 2=0V

OVP Feedback Voltage

【SCP】

Short Circuit Protection voltage

【UVLO】

VSCP

0.05

0.20

0.35

VOVP=SWEEP DOWN

Operating voltage (VCC)

hysterisis (VCC)

VUVLO_VCC

VUHYS_VCC

VUVLO_U

6.0

150

2.375

7.0

300

2.5

8.0

600

VCC=SWEEP UP

VCC=SWEEP DOWN

UVLO=SWEEP UP

UVLO=SWEEP DOWN

Cancel voltage (UVLO)

hysterisis (UVLO)

【FILTER(CP)】

2.625

200

VUHYS_U

100

CP detection voltage

CP source current

VCP

ICP

1.8

2.0

2.2

CP=SWEEP UP

VCP=0V

-2.0

-1.0

-0.5

【LED output (LED1～6)】

LED current accuracy

Open detection voltage

Short detection voltage

【STB】

⊿ILED

VOPEN

VSHORT

-3

ILED=40mA

0.05

4.5

0.20

5.0

0.35

5.5

VLED=SWEEP DOWN

VLED=SWEEP UP

Input High voltage

Input Low voltage

Input current

STBH

STBL

IEN

2.0

-0.3

VCC

0.8

VIN=5V(STB)

【PWM1, PWM2】

Input High voltage

Input Low voltage

Input current

PWMH

PWML

IPWM

2.0

-0.3

-5

5.0

0.5

VIN=5V(PWM1, PWM2)

IOL=1mA

【FAIL output(open drain)】

FAIL Low voltage

VOL

0.05

0.10

0.20

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

REV. Ａ

3/4

○ BLOCK DIAGRAM

VIN

CIN

CVREF

COUT

VREF5V

UVLO

OSDET

VCC

OVP

UVLO

(VCC)

VCC

UVLO

TSD

OVP

CVCC STB

FILTER

VREG

FAIL

SLOPE

PWM COMP

Driver

Control

Logic

OSC

Durrent

Sence

PGND3

AGND

ERR AMP

RPC

CPC

LED1

LED2

LED3

LED4

LED5

LED6

Current driver

SEL

PWM1

PWM2

○ PACKEGE, MARKING SPECIFICATION

VREF

ISET

PGND1

PGND2

ISET

Open-Short

Detect

BD9203EFV

OSDET

LOT No.

HTSSOP-B28

○ PIN No. & PIN NAME

No.

PIN Name

No.

Function

PIN Name

Function

PGND3

Power GND

VREF

DC dimming input

Filter set Cap.

DC/DC switching output

Active LED channel select pin

(3 state)

SEL

Error amp output

FAIL

UVLO

PWM2

PWM1

VCC

Protect signal output

Under voltage lock out input

External PWM input 2

External PWM input 1

Power Supply Voltage

Enable pin

PGND1

LED1

LED2

LED3

LED4

LED5

LED6

PGND2

LED output GND1

LED output 1

LED output 2

LED output 3

LED output 4

STB

LED output 5

VREF5V

AGND

Internal regulator output

Analog GND

LED output 6

LED output GND2

Soft start period setting Cap.

DC/DC over voltage protection

DC/DC current sense

CT frequency setting R

Slope compensation setting R

LED output current setting R

SLOPE

ISET

OVP

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) 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.

(Pin B)

TCransistor (NPN)

Resistor

(Pin A)

GND

P⁺

P substrate

Parasitic elements

GND

P substrate

Parasitic elements

(Pin A)

GND

(Pin B)

Parasitic elements

GND

Other Adjacent Elements

GND

Parasitic elements

Simplified structure of a Monolithic IC

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.

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

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R1010

BD9203EFV [ROHM]

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