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Rohm Semiconductor Electronic Components Datasheet

BD18347EFV-M Datasheet

Constant Current LED Driver

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Datasheet
For Automotive, 40 V 150 mA 4ch
Constant Current LED Driver
BD18337EFV-M BD18347EFV-M
General Description
BD18337EFV-M / BD18347EFV-M are 40
V-withstanding constant current LED driver for
automotive applications. It is a 4 channel LED driver with
the built-in energy sharing control which can realize to
make the board size small. High reliability can be
realized with LED Open Detection, the OUTx (all later
x=1 to 4) pin Short Circuit Protection, Over Voltage Mute
and Thermal Shutdown Function. In case the output
OUTx pin has 3 LEDs in series, BD18337EFV-M has to
be used, in case of 2 LEDs in series, BD18347EFV-M
has to be used.
Key Specifications
Input Voltage Range:
Maximum Output Current:
Output Current Accuracy:
Relative Channel Accuracy:
Operating Temperature Range:
5.5 V to 20.0 V
150 mA/ch
±5 %
±5 %
-40 °C to +125 °C
Package
HTSSOP-B16
W (Typ) x D (Typ) x H (Max)
5.00 mm x 6.40 mm x 1.00 mm
Features
AEC-Q100 Qualified(Note 1)
Energy Sharing Control
PWM Dimming Function
License Lamp Mode
LED Open Detection
OUTx pin Short Circuit Protection (SCP)
Over Voltage Mute Function (OVM)
Disable LED Open Detection Function
at Reduced-Voltage
LED Failure Input / Output Functions (PBUS)
(Note 1) Grade1
Applications
Automotive LED Exterior Lamp
(Rear Lamp, License Lamp, DRL / Position Lamp,
Fog Lamp etc.)
Automotive LED Interior Lamp
(Air Conditioner Lamp, Interior Lamp, Cluster Light
etc.)
Typical Application Circuit
PWM_in D1
D2
DC_in D3
+B
REXT
ZD1 CVIN1 CVIN2
CCRT
RCRT
VINRES
VIN
CRT
OUT1
OUT2
OUT3
OUT4
DISC BD18337EFV-M
BD18347EFV-M
MSET1
MSET2
PBUS
GND
SET1
SET2
SET3
SET4
COUT4
COUT3
RSET1
RSET2
RSET3
RSET4
COUT2
COUT1
Product structure : Silicon integrated circuit
www.rohm.com
©2019 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 14 • 001
This product has no designed protection against radioactive rays
1/35
TSZ02201-0T3T0B300300-1-2
25.Jul.2019 Rev.002


Rohm Semiconductor Electronic Components Datasheet

BD18347EFV-M Datasheet

Constant Current LED Driver

No Preview Available !

BD18337EFV-M BD18347EFV-M
Pin Configuration
VINRES 1
16 OUT1
VIN 2
15 OUT2
PBUS 3
14 OUT3
CRT
DISC
4
5
EXP- PAD
13 OUT4
12 GND
MSET1 6
11 MSET2
SET1 7
10 SET3
SET2 8
9 SET4
(TOP VIEW)
Pin Description
Pin No.
Pin Name
Function
1
VINRES
Energy sharing external resistor connection(Note 1)
2 VIN Supply voltage input
3
PBUS
Output for fault flag / Input to disable output current
4
CRT
CR TIMER setting1(Note 2)
5
DISC
CR TIMER setting2(Note 3)
6
MSET1
Mode setting pin 1
7
SET1
Output current setting pin 1
8
SET2
Output current setting pin 2
9
SET4
Output current setting pin 4
10
SET3
Output current setting pin 3
11
MSET2
Mode setting pin 2
12
GND
GND
13
OUT4
Current output pin 4
14
OUT3
Current output pin 3
15
OUT2
Current output pin 2
16
OUT1
Current output pin 1
-
EXP-PAD
The EXP-PAD connect to GND.
(Note 1) Short the VINRES pin to the VIN pin when not in use.
(Note 2) Short the CRT pin to the VIN pin when not in use.
(Note 3) Open the DISC pin or connect it to GND when not in use.
www.rohm.com
©2019 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
2/35
TSZ02201-0T3T0B300300-1-2
25.Jul.2019 Rev.002


Part Number BD18347EFV-M
Description Constant Current LED Driver
Maker ROHM
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