Document
Datasheet
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)
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
HRP7
W(Typ) x D(Typ) x H(Max) 9.395mm x 10.540mm x 2.005mm
HRP7
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.)
Basic Application Circuit
Figure 1. Typical Application Circuit
○Product configuration: Silicon monolithic integrated circuit
www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・14・001
○ The product is not designed for radiation resistance.
1/29
TSZ02201-0G1G0C700310-1-2 4.Feb.2015 Rev.002
BD83732HFP-M / BD83733HFP-M
Pin Configurations
(TOP VIEW) FIN(GND)
Datasheet
1234567
PBUS DISC CRT GND IOUT VIN_F
VIN
Pin Descriptions
HRP7 Package
Figure 2. HRP7 Package Pin Configuration
Pin No. 1 2 3 4 5 6 7
Pin Name PBUS DISC CRT GND IOUT VIN_F VIN
If not used DISC should be shorted to GND.
Block Diagram
Function Error detection I/O, LED current de-rating input terminal Discharge setting pin Capacitor Resistor Timer setting GND Current output Output current detection Power supply input
www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001
Figure 3. Block Diagram
2/29
TSZ02201-0G1G0C700310-1-2 4.Feb.2015 Rev.002
BD83732HFP-M / BD83733HFP-M
Datasheet
Absolute Maximum Ratings (Ta=25°C)
Parameter
Symbol
Rating
Unit
Supply Voltage VIN_F,CRT,DISC,IOUT,PBUS Terminal Voltage Power Dissipation
VIN VVIN_F,VCRT,VDISC,VIOUT,VPBUS
Pd
-0.3~+50 -0.3~VIN 2.29(Note1)
V V W
Operating Temperature Range
Topr
-40~125
°C
Storage Temperature Range
Tstg
-55~150
°C
Junction Temperature
Tjmax
150 °C
IOUT Output Maximum Current
IOUT
500 mA
(Note1) HRP7
De-rate by 18.4mW/°C when operating above Ta=25°C Please refer to page 21 below. Caution: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit between pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated over the absolute maximum ratings.
Recommended Operating Conditions
Parameter Supply Voltage(Note1)
Operating Temperature Range
CRTIMER Frequency Range
PWM Minimum Pulse Width
(Note1) Pd, ASO should not be exceeded
Operating Conditions
Parameter
Current Setting Resistor Capacitor connecting VIN terminal Capacitor connecting IOUT terminal Capacitor connecting CRT terminal DC_IN pull-down resistor
Symbol VIN Topr
FPWM TMIN
Symbol RVIN_F Cvin CIOUT CCRT RDCIN
Rating 4.5~42.0 -40~125 100~5000
10
Unit V °C Hz µs
Min Max 0.36 3.6 1.0 0.1 0.66 0.01 1.0
- 50
Unit Ω μF μF μF kΩ
www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001
3/29
TSZ02201-0G1G0C700310-1-2 4.Feb.2015 Rev.002
BD83732HFP-M / BD83733HFP-M
Datasheet
Electrical Characteristics (Unless otherwise specified Ta=-40~125°C, VIN= 13V, RVIN_F=0.47Ω, RPBUS=10kΩ)
Parameter
Symbol
Min Typ Max UNIT
Condition
Circuit Current
IVIN
IOUT Terminal Output Current Accuracy
IOUT
VIN – IOUT Drop Voltage
VDR_IOUT
IOUT Terminal OFF Current
IIOUT_OFF
IOUT Current at GND Short
IIOUT_SHORT
Current Sense Voltage
IOUT Voltage at LED Open Detection IOUT Voltage at LED Short Detection
CRT Terminal Charge Current
VIN_F_REF
VIOUT_OPEN VIOUT_
SHORT
ICRT_SO
CRT Terminal Voltage
CRT Terminal Discharge Voltage 1
CRTIMER Discharge Constant
CRT Terminal Discharge Voltage 2 CRT Terminal Charge Resistance DISC Terminal Discharge Resistance 1 DISC Terminal Discharge Resistance 2
VCRT_CHA
VCRT_DIS1 VCRT_CHA / VCRT_DIS1 VCRT_DIS2
RCHA
RD1
RD2
PBUS Terminal De-rating Input Voltage High
VDH_PBUS
PBUS Terminal De-rat.