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参数资料
| 型号： | BD1601MUV-E2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 9/17页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGT 16-VQFN |
| 标准包装： | 1 |
| 拓扑： | 切换式电容器（充电泵） |
| 输出数： | 4 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 800kHz ~ 1.2MHz |
| 电源电压： | 2.7 V ~ 5.5 V |
| 输出电压： | 4.7V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-VFQFN 裸露焊盘 |
| 供应商设备封装： | VQFN016V3030 |
| 包装： | 标准包装 |
| 工作温度： | -30°C ~ 85°C |
| 产品目录页面： | 1371 (CN2011-ZH PDF) |
| 其它名称： | BD1601MUV-E2DKR |
BD1601MUV
Datasheet
(2) Charge pump
a) Description of operations
Pin voltage comparison takes place at VOUT control section, and then VOUT generation takes place so that the LED
cathode voltage with the highest Vf is set to 0.2V. A boost rate is changed automatically to a proper one at the Charge
Pump Mode Control section so that operation can take place at possible low boost rate. When the current taken from
VBAT exceeds 600mA, the overcurrent limiter is activated and this IC is reset. In addition, if the output voltage falls
below 1.5V, this IC is reset for short-circuit at output.
b) Soft start function
BD1601MUV have a soft start function that prevents the rush current.
T OFF
EN/LED*
VOUT
I LED
Soft Start
Ordinal mode
Figure 15. Soft Start
c) Automatic boost rate change
The boost rate automatically switches to the best mode.
* (×1 mode -> ×1.5 mode) or (×1.5 mode -> ×2 mode)
If a battery voltage drop occursBD1601MUV cannot maintain the LED constant current, and then mode transition begins.
* (×1.5 mode -> ×1 mode) or (×2 mode -> ×1.5 mode)
If a battery voltage rise occurs, VOUT and VBAT detection are activated, and then mode transition begins.
(3) UVLO (Ultra low Voltage Lock Out)
If the input voltage falls below 2.2V, BD1601MUV is shut down to prevent malfunction due to ultra-low voltage.
(4) OVP (Over Voltage Protection)
This circuit protects this IC against damage when the C/P output voltage (VOUT) rises extremely for some external factors.
(5) Thermal shutdown (TSD)
To protect this IC against thermal damage or heat-driven uncontrolled operations, this circuit turns off the output if the
chip temperature rises over 175 ℃ . In addition, it turns on the output if the temperature returns to the normal temperature.
(6) Power sequence
VBAT
EN
*VBAT voltage ≧ EN voltage
Figure 16. Power sequence
www.rohm.com
? 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
9/14
TSZ02201-0G3G0C200030-1-2
05.Nov.2012 Rev.001
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|---|---|
| BD1603NUV | 制造商:ROHM 制造商全称:Rohm 功能描述:Backlight LED Driver for Small LCD Panels (Charge Pump Type) |
| BD1603NUV_1 | 制造商:ROHM 制造商全称:Rohm 功能描述:Charge Pump type LED driver for mobile instrument |
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| BD1603NUV-E2 | 功能描述:LED照明驱动器 Backlight LED Driver for Small Panel RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
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