○Product configuration: Silicon monolithic integrated circuit ○ The product is not designed for radiation resistance.

1/29

TSZ02201-0G1G0C700310-1-2

© 2014 ROHM Co., Ltd. All rights reserved.

2016.Aug.25 Rev.003

www.rohm.com

TSZ22111・14・001

HRP7

Constant Current LED Drivers

50V 500mA

1ch Source Driver for Automotive

BD83732HFP-M

BD83733HFP-M

General Description

BD83732HFP-M and BD83733HFP-M are 50V tolerant

LED current drivers. Suitable for Automotive LED

applications, it can control light through constant current

output with control using PWM.

Having LED open/short detective circuit and LED current

de-rating functions integrated, it can deliver high reliability.

By utilizing

Rohm’s patented PBUS function, it is possible

to turn OFF all LEDs when a row of LEDs are

short/open-circuited if multiple number of the ICs are used

In case the LED connected to the output IOUT terminal

has 2 LEDs in serise, BD83732HFP-M has to be used, in

case of 3 LEDs in series - BD83733HFP-M ( Refer to

Page.18 LED Open Detection / Disable LED Open

Detection ).

Features

 AEC-Q100 Qualified

 Variable form Constant-Current Source Driver

 PWM Dimming Function

 LED constant current set by external resistor

 LED Current De-rating Function

 LED Open/Short detection

 Disable LED Open Detection at low power supply

 Temperature Protective

 Abnormal Output Detection and Output Functions

(PBUS)

Application

 On-board Exterior Lamp

(Rear Lamp, Turn Lamp, DRL/Position Lamp,

Fog Lamp, etc.)

 On-board Interior Lamp

(Air Conditioner Lamp, Interior Lamp,

Cluster Light, etc.)

Key Specifications

 Input Voltage Range: 4.5V to 42V

 Max Output Current: 500mA (Max)

 Output Current Accuracy: ±5% (Max)

 Operating Temperature Range: -40°C to +125°C

Packages

W(Typ) x D(Typ) x H(Max)

HRP7

9.395mm x 10.540mm x 2.005mm

Basic Application Circuit

Figure 1. Typical Application Circuit

VIN_F

VIN

CRT

DISC

PBUS

IOUT

GND

BD83732HFP-M

BD83733HFP-M

D1

D2

D3

+B

DC_in

PWM_in

FIN

Datasheet