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参数资料
| 型号： | BD6142AMUV-E2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 10/33页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER SGL STEP UP 24QFN |
| 标准包装： | 2,500 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 8 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 1MHz ~ 1.5MHz |
| 电源电压： | 4.2 V ~ 27 V |
| 输出电压： | 41V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-VFQFN 裸露焊盘 |
| 供应商设备封装： | VQFN024V4040 |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
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BD6142AMUV
● Protection
PROTECTION TABLE
Datasheet
CASE
FAILURE
MODE
DETECTION
MODE
FAIL
CHANNEL
GOOD
CHANNEL
VOUT
REGULATED BY
FAULT
Terminal
LED Short
CH1 > VSC(5V) LED current stop and CH2 to CH8
Highest VF
‘H’ ? ‘L’
1
connected CH1
DC/DC feedback
Normal
of CH2 to CH8
(Latch)
doesn’t return
LED OPEN
CH1 < 0.2V
LED current stop and CH2 to CH8
Highest VF
‘H’ ? ‘L’
2
connected CH1
and
DC/DC feedback
Normal
of CH2 to CH8
(Latch)
VOUT > VOVP
doesn’t return
VOUT/LX GND
OVP < 50mV FAULT change from L to H, and
‘H’ ? ‘L’
3
SHORT
switching is stopped.
-
When OVP>50mV, FAULT return L
Output LED
VOUT > VOVP FAULT change from L to H, and
‘H’ ? ‘L’
4
stack voltage too
high
switching is stopped.
Even if OVP<1.2V, FAULT don’t return L
-
LX current too
OCP > 2.5A
FAULT change from L to H, and
‘H’ ? ‘L’
5
high
or
OTP > 130 ? C
switching is stopped.
Even if IC return normal status, FAULT
-
don’t return L
? Over voltage protection (OVP)
At such an error of output open as the output DC/DC and the LED is not connected to IC, the DC/DC will boost too much
and the OVP terminal exceed the absolute maximum ratings, and may destruct the IC. Therefore, when OVP terminal
becomes sensing voltage or higher, the over voltage limit protection works, and turns off the switching Tr, and DC/DC will be
stopped.
At this moment, the IC changes from activation into non-activation, and the output voltage goes down slowly. And, when the
Feedback of CH1 isn’t returned, so that VOUT will return normal voltage.
ENABLE, PWM
VOUT
OVP Signal
CH1 voltage
CH1 connection connect
CH2 connection
Hysteresis(typ 2.5%)
open
connect
Feedback
CH1
CH2
CH1
CH1 current 20mA
CH2 current 20mA
0mA
0mA
Figure 17. OVP operating description
www.rohm.com
? 2011 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
10/30
TSZ02201-0G3G0C400340-1-2
03.Dec.2012 Rev.001
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