- 您现在的位置：买卖IC网 > Datasheet目录315 > BD6142AMUV-E2 (Rohm Semiconductor)IC LED DRIVER SGL STEP UP 24QFN Datasheet资料下载
参数资料
| 型号： | BD6142AMUV-E2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 11/33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 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页当前第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页
BD6142AMUV
Datasheet
This section is especially mentioned here because the spec shown electrical characteristic is necessary to explain this
section.
Over voltage limit
LED control voltage
LED terminal over voltage protect
min 1.16V typ 1.20V max 1.24V
min 0.64V typ 0.80V max 0.96V
min 4.25V typ 5.00 V max 5.75V
1.
2.
3.
4.
Calculate the conditions that the total value of LED VF is MAX.
Example) In the case of serial 8 LEDs with VF=2.9V(min), 3.2V(typ), 3.5V(max) => 3.5V x 8=28V
Then calculate the biggest value of output with the following formula.
The biggest value of output = the biggest value calculated for 1 + the biggest value of LED terminal voltage. (0.96V)
Example) The biggest value of output = 28V + 0.96V =28.96V
Set the smallest value of over voltage larger than the biggest value of output.
If over voltage is closer to the total value of VF, it could be occurred to detect over voltage by ripple, noise, and so on.
It is recommended that some margins should be left on the difference between over voltage and the total value of VF.
This time around 6% margin is placed.
Example) Against the biggest value of output = 28.96V, the smallest value of over voltage = 28.96V x 1.06 = 30.70V
Ic over voltage limit min=1.16V, typ=1.20V, max=1.24V
typ = 30.70V × (1.20V/1.16V) = 31.76V
max = 31.76V × (1.26V/1.20V) = 33.35V
The below shows how to control resistor setting over voltage
Please fix resistor high between OVP terminal and output and then set over voltage after changing resistor between
OVP terminal and GND. While PWM is off, output voltage decreases by minimizing this resistor. Due to the decrease of
output voltage, ripple of output voltage increases, and singing of output condenser also becomes bigger.
Example) Selecting OVP resistor.
? OVP resistor selection
(Example. 1) VF=3.5V max, serial = 7 LED
OVP = 1.2V, R1 = 2.2M ? , R2 = 95.3k ?
VOUT = 1.2 × (2.2M ? + 95.3k ? )/ 95.3k ? = 28.90V
(Example. 2) VF=3.5V max, serial = 8 LED
OVP = 1.2V, R1 = 2.2M ? , R2 = 82k ?
VOUT = 1.2 × (2.2M ? + 82k ? )/ 82k ? = 33.40V
(Example. 3) VF=3.5V max, serial = 9 LED
OVP = 1.2V, R1 = 2.2M ? , R2 = 73.2k ?
VOUT = 1.2 × (2.2M ? + 73.2k ? )/ 73.2k ? = 37.27V
(Example. 4) VF=3.5V max, serial = 10 LED
OVP terminal
VOUT
R1
R2
OVP = 1.2V, R1 = 2.2M ? , R2 = 68k ?
VOUT = 1.2 × (2.2M ? + 68k ? )/ 68k ? = 40.02V
? External SBD open detect / Output Short protection
In the case of external SBD is not connected to IC, or VOUT is shorted to GND, the coil or internal Tr may be destructed.
Therefore, at such an error as OVP becoming 50mV(typ.) or below, turns off the output Tr, and prevents the coil and the IC
from being destructed.
And the IC changes from activation into non-activation, and current does not flow to the coil (0mA).
? Thermal shut down
This IC has thermal shut down function.
The thermal shut down works at 130 ? C (typ.) or higher, and the IC changes from activation into non-activation.
www.rohm.com
? 2011 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
11/30
TSZ02201-0G3G0C400340-1-2
03.Dec.2012 Rev.001
相关PDF资料 |
PDF描述 |
|---|---|
| BD6581GU-E2 | IC LED DVR WHT BCKLGHT VCSP85H2 |
| BD6583MUV-AE2 | IC LED DRIVER WHIT BCKLGT 24VQFN |
| BD6586MUV-E2 | IC LED DRVR WHITE BCKLGT 24-VQFN |
| BD6592MUV-E2 | IC LED DRVR WHITE BCKLGT 24-VQFN |
| BD7844AEFV-E2 | IC LED DISPLAY DVR 5V 28-HTSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| BD615 | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:PNP SILICON EPIBASE TRANSISTORS |
| BD6150CS | 制造商:PANJIT 制造商全称:Pan Jit International Inc. 功能描述:SURFACE MOUNT SCHOTTKY BARRIER RECTIFIERS |
| BD6150CT | 制造商:PANJIT 制造商全称:Pan Jit International Inc. 功能描述:SURFACE MOUNT SCHOTTKY BARRIER RECTIFIERS |
| BD6150MUV | 制造商:ROHM 制造商全称:Rohm 功能描述:White Backlight LED Driver for Medium to Large LCD Panels (Switching Regulator Type) |
| BD6150MUV_11 | 制造商:ROHM 制造商全称:Rohm 功能描述:White Backlight LED Driver for Medium to Large LCD Panels (Switching Regulator Type) |
发布紧急采购，3分钟左右您将得到回复。