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PDF BD83732HFP-M Data sheet ( Hoja de datos )
| Número de pieza | BD83732HFP-M | |
| Descripción | 1ch Source Driver | |
| Fabricantes | ROHM Semiconductor | |
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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.
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TSZ02201-0G1G0C700310-1-2
4.Feb.2015 Rev.002
1 page  
BD83732HFP-M / BD83733HFP-M
●Typical Performance Curves (Reference Data)
(Unless otherwise specified Ta=25°C, VIN=13V, RCRT=3.9Ω, CCRT=0.033μF, CIOUT=0.1μF )
Datasheet
Figure 4. RVIN_F vs IOUT
ΔIOUT=(IOUT/(0.18V/RVIN_F)-1)×100[%]
Figure 5. RVIN_F vs ΔIOUT
Figure 6.Temperature vs VIN_F_REF
Figure 7. PBUS vs VIN_F_REF
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/29
TSZ02201-0G1G0C700310-1-2
4.Feb.2015 Rev.002
5 Page 
BD83732HFP-M / BD83733HFP-M
Datasheet
Setting VIN Range
Number of LED connections N should meet the following conditions:
Vf_led × N ≤ +B – Vf_diode –VIN_F_REF –VDR_IOUT
where:
+B is the Battery Voltage
Vf_diode is the Reverse Connection Preventing Diode Vf
VIN_F_REF is the VIN_F Terminal Voltage (VIN – VIN_F)
VDR_IOUT is the IOUT Terminal Drop Voltage
Vf_led is the LED Vf ( maximum )
N is the Number of LED Levels
Example : If you want to supply constant current to LED at 9V or higher Battery Voltage (+B) (Supposing that Vf_diode is
0.5V),
Vf_led × N ≤ +B – Vf_diode － VIN_F_REF － VDR_IOUT = 9V –0.5V –0.189V(Max) – 1.0V(Max) = 7.311V
(Sum of Vf of LED connected to IOUT terminal is set to be 7.311V Max.)
Vf_diode
VIN_F_REF
IOUT
D1
PWM_in
ZD1
D2
CVIN
RVIN_F
VIN_F
VIN
IOUT
CIOUT
Vf_led × N
DC_in
+B
D3
RDCIN
RPBUS1
CCRT RCRT
CRT BD83732HFP-M
BD83733HFP-M
ZD2 RPBUS2
DISC
FIN
RTHM
PBUS
GND
Figure 17. LED Setting Range Schematic
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/29
TSZ02201-0G1G0C700310-1-2
4.Feb.2015 Rev.002
11 Page | ||
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| PDF Descargar | [ Datasheet BD83732HFP-M.PDF ] | |
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