BD81A04AEFV-M 반도체 회로 부품 판매점
4ch White LED Driver
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 ROHM Semiconductor |
Datasheet
4ch White LED Driver with Buck-Boost and
Built-in FET (32 LED Maximum)
BD81A04AMUV-M BD81A04AEFV-M
General Description
BD81A04AMUV-M/EFV-M is a white LED driver with the capability
of withstanding high input voltage (40V Max). This driver has 4ch
constant-current drivers integrated in 1-chip, where each channel
can draw up to 120mA (Max), which is also suitable for high
illumination LED drive. Furthermore, a buck-boost current mode
DC/DC controller is also integrated to achieve stable operation
during power voltage fluctuation. Light modulation (dimming
function) is possible by PWM input. The Nch MOSFET for power
surge is also integrated in the chip, thereby saving spaces of board
sets.
Key Specifications
Operating Input Voltage Range
Output LED Current Accuracy
DC/DC Oscillation Frequency
Operating Temperature Range
LED Maximum Output Current
4.5 to 35 V
±3.0%@50mA
200 to 2200kHz
-40 to +125℃
120mA/ch
Package
W(Typ) x D(Typ) x H(Max)
Features
Integrated Buck-Boost current mode DC/DC controller
Integrated 4ch current driver for LED drive
PWM light modulation (Dimming)-supported
External switching frequency synchronization
Built-In protection function (UVLO, OVP, OCP, SCP)
LED abnormality detection function (Open/Short)
Integrated VOUT discharge function (Buck-Boost structure
limitation)
AEC-Q100 Qualified
Application
Audio Display, Small and Medium type LCD Panels for
Automotive use.
VQFN28SV5050
BD81A04AMUV-M
5.00mm x 5.00mm x 1.00mm
HTSSOP-B28
BD81A04AEFV-M
9.70mm x 6.40mm x 1.00mm
Application Circuit Diagram
CIN
VIN
(GND)
(GND)
(GND)
VREG
VCC
EN
VDISC
OVP
CS
BOOT
OUTH
SW
Vout
COUT
(DGND)
(DGND)
RRT
(GND)
SYNC
RT
RPC
CPC
(GND)
CSS
(GND)
COMP
SS
PWM
(DGND)
OUTL
BD81A04AMUV-M /
DGND
BD81A04AEFV-M
(DGND)
LED 1
LED 2
LED 3
LED 4
RISET
(GND)
(GND)
ISET
GND
SHDETEN
LEDEN 1
LEDEN 2
PGND
FAIL 1
(PGND)
FAIL 2
Figure 1. Buck-Boost Application Circuit
Product structure Silicon monolithic integrated circuit
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111 15 001
This product has no designed protection against radioactive rays
1/34
TSZ02201-0G3G0C600010-1-2
4.Dec.2013 Rev.003
Free Datasheet http://www.datasheet4u.com/
BD81A04AMUV-M BD81A04AEFV-M
Datasheet
Pin Configuration
VQFN28SV5050 (Top View)
HTSSOP-B28 (Top View)
Figure 2. Pin Placement
Block Diagram
Pin Description
VQFN28 HTSSOP
SV5050
-B28
1 11
2 12
3 13
4 14
5 15
6 16
7 17
8 18
9 19
10 20
11 21
12 22
13 23
14 24
15 25
16 26
17 27
18 28
19 1
20 2
21 3
22 4
23 5
24 6
25 7
26 8
27 9
28 10
--
Terminal
Pin Name
LEDEN1
LEDEN2
LED1
LED2
LED3
LED4
OVP
ISET
PGND
OUTL
DGND
VDISC
SW
OUTH
BOOT
VREG
EN
CS
VCC
SS
COMP
RT
SYNC
SHDETEN
GND
PWM
FAIL1
FAIL2
Thermal
PAD
Function
LED output pin enable terminal 1
LED output pin enable terminal 2
LED output terminal 1
LED output terminal 2
LED output terminal 3
LED output terminal 4
Over-voltage detection terminal
LED output current setting terminal
LED output GND terminal
Low side FET drain terminal
DC/DC output GND terminal
Output voltage discharge terminal
High side FET source terminal
High side FET gate terminal
High side FET driver power supply
terminal
Internal constant voltage
Enable terminal
DC/DC current sense terminal
Input power supply terminal
“Soft Start” Capacitor connection
ERR AMP output
Oscillation Frequency-setting resistance
input
External synchronization signal input
terminal
Short detection enable signal
Small signal GND terminal
PWM light modulation input terminal
“Failure” signal output terminal
LED open/short detection output signal
Back side thermal PAD
(Please connect to GND)
VCC
EN
SYNC
RT
COMP
SS
VREG
VDISC
UVLO TSD
VREG
PWM
OVP
Timer
Latch
Control Logic
OSC
SLOPE
－
PWM
＋
OCP
＋
－
DRV
CTL
VREG
OCP OVP
ERR AMP
－
－
－
－
＋
SS
PWM
Current driver
ISET
GND
ISET
Open Short Detect
Timer
Latch
Open Det
Short Det
SHDETEN LEDEN1 LEDEN2
OVP
CS
FAIL1
BOOT
OUTH
SW
OUTL
DGND
LED1
LED2
LED3
LED4
PGND
FAIL2
Figure 3. Internal Block
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111 15 001
2/34
TSZ02201-0G3G0C600010-1-2
4.Dec.2013 Rev.003
Free Datasheet http://www.datasheet4u.com/
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( rohm )
BD81A04AEFV-M led
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