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BD81A34MUV-M PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 BD81A34MUV-M
기능 4ch White LED Driver
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BD81A34MUV-M 데이터시트, 핀배열, 회로
Datasheet
4ch White LED Driver with Buck-Boost
(32 LED Maximum)
BD81A34MUV-M BD81A34EFV-M
General Description
BD81A34MUV-M/EFV-M is a white LED driver with the capability of
withstanding high input voltage (35V 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.
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
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
Package(s) W(Typ) x D(Typ) x H(Max)
VQFN28SV5050
HTSSOP-B28
(BD81A34MUV-M)
(BD81A34EFV-M)
W×L×H
W×L×H
5.0 ×5.0 ×1.0
9.7 ×6.4 ×1.0
Application
Audio Display , Navi , CID , Cluster , HUD
Small and Medium type LCD Panels for Automotive use.
Application Circuit Diagram
CIN
Vin
(GND)
(GND)
CREG
(GND)
VCC
EN
VREG
VDISC
SYNC
RT
RRT
(GND)
COMP
RPC
CPC
(GND)
SS
CSS
(GND)
PWM
BD81A34MUV-M
ISET
RISET
(GND)
GND
(GND)
LEDEN1 LEDEN2
Product structure Silicon monolithic integrated circuit
This product has no designed protection against radioactive rays
OVP
FB
CS
FAIL1
BOOT
OUTH
SW
(DGND)
OUTL
DGND
(DGND)
LED1
LED2
LED3
LED4
PGND
(PGND)
FAIL2
COUT
(DGND)
(DGND) (DGND)
(DGND)
Figure 1. Buck-Boost Application Circuit
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111 14 001
1/33
TSZ02201-0G3G0C600020-1-2
16.Jan.2014 Rev.002




BD81A34MUV-M pdf, 반도체, 판매, 대치품
BD81A34MUV-M BD81A34EFV-M
Datasheet
Electrical Characteristics (VCC=12V, Ta = Tj = -40°C to +125°C *Unless otherwise specified)
Parameters
Signal
Standard Value
MIN TYP MAX
Unit
Condition
Circuit current
EN=High, SYNC=High, RT=OPEN
ICC - - 10 mA PWM=Low,ISET=OPEN,CIN=10μF
standby current
[VREG Section]
IST - - 10 μA EN=Low, VDISC=OPEN
Voltage reference
VREG 4.5 5 5.5 V IREG=-5mA, CREG=2.2μF
[OUTH Section]
OUTH top side ON resistor
1.9 3.5 6.2 ION=-10mA, Ta=25
RONHH
1.5 3.5 7.0 ION=-10mA, Ta=-40°C to +125°C
1.0 2.5 5.0 ION=10mA, Ta=25
OUTH bottom side ON resistor
RONHL
0.8 2.5 5.5 ION=-10mA, Ta=-40°C to +125°C
OCP detection voltage
[OUTL Section]
OUTL top side ON resistor
VOLIMIT
VCC-0.66 VCC-0.6 VCC-0.54 V
1.9 3.5 6.5 ION=10mA, Ta=25
RONLH
1.5
3.5
10.0
ION=-10mA, Ta=-40°C to +125°C
OUTL bottom side ON resistor
[SW Section]
SW ON resistor
[Error Amp Section]
LED control voltage
RONLL
RON_SW
VLED
1.0 2.5 5.0 ION=10mA, Ta=25
0.8 2.5 5.5 ION=-10mA, Ta=-40°C to +125°C
5.0
10.0
15.0
ION=10mA, Ta=25
4.0
10.0
25.0
ION=-10mA, Ta=-40°C to +125°C
0.9 1.0 1.1 V
COMP sink current
ICOMPSINK
20
80
160 μA VLED=2V, VCOMP=1V
COMP source current
[Oscillation Section]
Oscillation frequency 1
ICOMPSOURCE
-160
fosc1
285
-80
300
-20 μA VLED=0V, VCOMP=1V
315 kHz RT=27k
Oscillation frequency 2
[OVP Section]
OVP detection voltage
fosc2
VOVP
1800
2000
2200
kHz RT=3.9k
1.9 2.0 2.1 V VOVP=Sweep up
OVP hysteresis width
VOVPHYS
0.45
0.55
0.65 V VOVP=Sweep down
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111 15 001
4/33
TSZ02201-0G3G0C600020-1-2
16.Jan.2014 Rev.002

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BD81A34MUV-M 전자부품, 판매, 대치품
BD81A34MUV-M BD81A34EFV-M
Typical Performance Curves - continued
52
52
Datasheet
51
50
VCC=12V,EN=4V
49 VLED=SWEEP
Ta=25
48
0
1234
SSuuppplpylyVoVlotaltgaege: V: VLELEDD[[VV]]
5
Figure 8. Output Current vs Supply Voltage
51 VCC=12V
EN=4V
VLED 2V
PWM VREG
50
49
48
-60
-20 20
60 100
Temperature Ta[]
140
Figure 9. Output Current vs Temperature
100
95
90
85
80
75
VCC=12V
EN=4V
70 PWM=VREG
Ta=25
65 4-LED Series, 4ch Mode
60
80
130 180 230
OOuuttppuutt cCuurrrreenntt: IILLEEDD[m[mAA] ]
Figure 10. Efficiency vs Output Current
(Buck-Boost Application)
100
95
90
85
80
75
VCC=12V
70 EN=4V
PWM=VREG
Ta=25
65 7-LED Series, 4ch Mode
60
80
130 180 230
OOuutptpuut ct uCrurerrnetnt :ILIELEDD[[mmAA]]
Figure 11. Efficiency vs Output Current
(Boost Application)
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111 15 001
7/33
TSZ02201-0G3G0C600020-1-2
16.Jan.2014 Rev.002

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부품번호상세설명 및 기능제조사
BD81A34MUV-M

4ch White LED Driver

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