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부품번호 | BD6142AMUV 기능 |
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기능 | 8-Channel White LED Driver | ||
제조업체 | ROHM Semiconductor | ||
로고 | |||
전체 30 페이지수
Datasheet
8-Channel White LED Driver
with Integrated FET for up to 80 LEDs
BD6142AMUV
●General Description
This IC is white LED driver IC with PWM step-up
DC/DC converter that can boost max 41V and current
driver that can drive max 30mA. The wide and
precision brightness can be controlled by external
PWM pulse. This IC has very accurate current drivers,
and it has few current errors between each strings. So,
it will be helpful to reduce brightness spots on the LCD
panel. Small package is suited for saving space.
●Features
High accuracy & good matching current drivers 8ch
(MAX30mA/ch)
Integrated 50V power Nch MOSFET
Soft Start function
Drive up to 11 LEDs in series, 8 strings in parallel
Rich safety functions
・Over-voltage protection
・External SBD open detect / Output Short
protection
・Over current limit
・CH Terminal open / GND short protect
・CH over voltage protect / LED short protect
・Thermal shutdown
・UVLO
Analog Brightness Control
●Key Specifications
Operating power supply voltage range: 4.2V to 27.0V
LED maximum current:
30mA (Max.)
Quiescent Current:
1.6μA (Typ.)
Switching frequency:
1.25MHz(Typ.)
Operating temperature range:
-40℃ to +85℃
●Package W(Typ.) x D (Typ.) x H(Max.)
VQFN024V4040
4.00mm x 4.00mm x 1.00mm
VQFN024V4040
Figure 1. Package
●Applications
All medium sized LCD equipments, Backlight of
Notebook PC, net book, monitor, light, Portable DVD
player, light source etc.
●Typical Application Circuit (8 Parallel)
10µF
7V to27V
10µH
2. 2µ F/50V
2.2µF
VOUT
10 serial x 8 parallel (80pcs)
2.1V to VIN
RESET
LX LX
ENAB LE
FAULT
VIN
VDC
OV P
PWM
PWM
fPW M=100Hz~25kHz
1kΩ
22nF
GND
PG ND
CO MP
PGND
B D 61 42 AM U V
PGND GND TEST FSET ABC ISET
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH8
56kΩ 1nF
36kΩ
Figure 2. Typical Application Circuit
2.2MΩ
68kΩ
20mA
○Product structure:Silicon monolithic integrated circuit
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product is not designed protection against radioactive rays
1/30
TSZ02201-0G3G0C400340-1-2
03.Dec.2012 Rev.001
BD6142AMUV
●Pin Descriptions
Pin No. Pin Name
1 ENABLE
2 TEST
3 FSET
4 ABC
5 GND
6 PWM
7 CH8
8 CH7
9 CH6
10 CH5
11 ISET
12 CH4
13 CH3
14 CH2
15 CH1
16 OVP
17
PGND
18
19
LX
20
21 FAULT
22 COMP
23 VIN
24 VDC
- Thermal PAD
●Pin ESD Type
IO Function
In PWM input pin for power ON/OFF or Power control
In TEST signal (Pull down 100kΩ within IC)
In Resister connection for frequency setting
In Analog Brightness Control
- GND for Switching Regulator
In PWM input pin for power ON/OFF only driver
In Current sink for CH8
In Current sink for CH7
In Current sink for CH6
In Current sink for CH5
In Resister connection for LED current setting
In Current sink for CH4
In Current sink for CH3
In Current sink for CH2
In Current sink for CH1
In Detect input for SBD open and OVP
- PGND for switching Tr
Out Switching Tr drive terminal
Out Switching Tr drive terminal
Out Fault signal
Out ERRAMP output
In Battery input
Out Regulator output / Internal power-supply
-
Heat radiation PAD of back side
Connect to GND
Datasheet
Terminal diagram
E
E
A
C
B
E
C
C
C
C
A
C
C
C
C
C
D
F
F
C
A
G
C
VDC
PIN
VIN
PIN
PIN
VIN
PIN
GND
A
PGND
B
GND
C
GND
D
PIN
GND
E
5.5V
Clump
PIN
PGND
F
PIN
GND PGND
G
Figure 3. Pin ESD Type
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
4/30
TSZ02201-0G3G0C400340-1-2
03.Dec.2012 Rev.001
4페이지 BD6142AMUV
Datasheet
<Condition>
■Ta = 25℃
■10 serial×8parallel
■LED Current = 20mA
■Coil = TDK, LTF5022T-100M1R4-LC
Figure 9. Efficiency
<Condition>
■Ta = 25℃
■10 serial×6parallel
■LED Current = 20mA
■Coil = TDK, LTF5022T-100M1R4-LC
Figure 10. Efficiency
●Application example
Figure 11, Figure 12 and Figure 13 are Application examples (15.4inch and 12inch and 10.1inch model). Recommended
schematics and Layout are shown in P22.
7V to 27V
10µF
10µH
2.2µF/50V
2.2µF
VOUT
10 serial x 8 parallel (80pcs)
2.1V to VIN
RESET
PW M
fPWM=100Hz~25kHz
1kΩ
22nF
GND
PGND
LX LX
ENABLE
PW M
FAULT
VIN
VDC
OVP
COMP BD6142AMUV
PGND PGND GND TEST FSET ABC ISET
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH8
56kΩ 1nF
36kΩ
2.2MΩ
68kΩ
20mA
Figure 11. BD6142AMUV Application example (8 parallel)
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
7/30
TSZ02201-0G3G0C400340-1-2
03.Dec.2012 Rev.001
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부품번호 | 상세설명 및 기능 | 제조사 |
BD6142AMUV | 8-Channel White LED Driver | ROHM Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |