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PDF BD8374HFP-M Data sheet ( Hoja de datos )

Número de pieza BD8374HFP-M
Descripción 50V 500mA 1ch Source Driver
Fabricantes ROHM Semiconductor 
Logotipo ROHM Semiconductor Logotipo



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Datasheet
Constant Current LED Drivers
50V 500mA
1ch Source Driver for Automotive
BD8374HFP-M BD8374EFJ-M
General Description
BD8374HFP-M and BD8374EFJ-M are 50V-withstanding
LED source drivers. Most suitably for Automotive
LED driving, it can control light through PWM of constant
current output.
Having LED open/short detective circuit and overvoltage
mute functions integrated, it can deliver high reliability.
Also by utilizing our patented PBUS function, it is possible
to turn OFF all LEDs in case where a row of LEDs are
short/open-circuited if multiple rows of LEDs are driven
through multiple number of the ICs.
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
HTSOP-J8
W(Typ) x D(Typ) x H(Max)
9.395mm x 10.540mm x 2.005mm
4.90mm x 6.00mm x 1.00mm
Features
AEC-Q100 Qualified
Variable form Constant-Current Source Driver
PWM Dimming Function
CR Timer for PWM Dimming Function Integrated
LED Open/Short detective Circuit Function Integrated
Overvoltage Mute and Temperature Protection
Functions Integrated
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.)
HRP7
HTSOP-J8
Basic Application Circuit
VIN_F
VIN
IOUT
CRT BD8374HFP-M
BD8374EFJ-M
DISC
FIN
PBUS
GND
Figure 1. Typical Application Circuit
Product configuration: Silicon monolithic integrated circuit
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
The product is not designed for radiation resistance.
1/29
TSZ02201-0G1G0C700310-1-2
2016.09.06 Rev.003

1 page




BD8374HFP-M pdf
BD8374HFP-M BD8374EFJ-M
Typical Performance Curves (Reference Data)
(Unless otherwise specified Ta=25°C, VIN=VIN_F=13V)
500
450
400
350
300
250
200
150
100
50
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
RVIN_F[Ω]
Figure 5. RVIN_F vs IOUT
ΔIOUT=(IOUT/(0.18V/RVIN_F)-1)×100[%]
Figure 6. RVIN_F vs ΔIOUT
0.190
0.188
0.186
0.184
0.182
0.180
0.178
0.176
0.174
0.172
0.170
-50 -25 0 25 50 75 100 125 150
Temp[°C]
Figure 7. Temperature vs VIN_F_REF
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
0
10 20 30 40
VIN[V]
Figure 8. VIN vs VIN_F_REF
50
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
5/29
TSZ02201-0G1G0C700310-1-2
2016.09.06 Rev.003

5 Page





BD8374HFP-M arduino
BD8374HFP-M BD8374EFJ-M
6. Protective Function
In this IC integrated is a function for protection from short/open-circuit of external component, and it is possible to detect
abnormal condition at PBUS terminal.
(1) LED Open Detective Function
In case where LED connected to IOUT terminal is open-circuited, it is detected due to overvoltage of IOUT terminal.
During the detection, PBUS terminal is switched to Low to notify the trouble.
VIN_F
VIN
VREF
PBUS
PBUS
IOUT
Current
Control
VIN-0.05V
(Typ)
-
+
GND
OPEN
Figure 16. LED Open Detection
(2) LED Short-circuit Detective Function
In case where LED connected to IOUT terminal is short-circuited, it is detected due to low voltage of IOUT terminal.
During the detection, output current is turned OFF to prevent thermal destruction of IC, and PBUS terminal is
switched to Low to notify the trouble.
OFF
VIN_F
IOUT
VIN
VREF
PBUS
PBUS
Current
Control
OFF Signal
-
+
GND
0.6V
(Typ)
SHORT
Figure 17. LED Short-circuit Detection
(3) IOUT Current at GND Short (IIOUT_SHORT)
When VIOUT is less than 1.4V(Typ), IOUT Current at GND Short(IIOUT_SHORT) flows from IOUT terminal.
It is varied due to IOUT terminal Voltage.
SHORT
DETECT
V1
VIN
VIN_F
IIOUT_
SHORT
IOUT
GND
1.4V(Typ)
VIOUT
0V
2.0V(Typ)
V1
0.6V(Typ)
IIOUT_
SHORT
7uA(Typ)
0uA
Figure 18. About IOUT Current at GND Short
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
11/29
TSZ02201-0G1G0C700310-1-2
2016.09.06 Rev.003

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