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参数资料
| 型号： | BD1603NUV-E2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 8/15页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGT 10-VSON |
| 标准包装： | 1 |
| 拓扑： | PWM，切换式电容器（充电泵） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 642kHz |
| 电源电压： | 2.7 V ~ 5.5 V |
| 输出电压： | 5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-VFDFN 裸露焊盘 |
| 供应商设备封装： | 10-VSON |
| 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： | BD1603NUV-E2DKR |
BD1603NUV
Datasheet
8.
Setting the LED Current
The LED current is set as follows.
The constant must be determined, considering variations in resistance and LED.
ILED ?
VOUT ? V F
R
? A ?
V OUT
VOUT: Output voltage of BD1603NUV
V F : V F in the LED to be connected
BD1603NUV
V F
R : LED current setting resistance
R
Figure 14. Setting the LED Current
9.
Brightness Control
Brightness Control takes place in this LSI as follows.
a) PWM
The EN pin is turned ON or OFF repeatedly via the PWM signal.
It is recommended that the PWM frequency is 100Hz or below. This frequency must be determined, fully evaluating
the linearity of brightness to the PWM duty. Brightness control must take place as shown in “b” below if the rush
current causes a problem when the EN pin is ON.
PWM signal
BD1603NUV
EN
Figure 15. PWM Brightness Control
Control
Figure 16. ON/OFF Pin Control
(4.5V, 100Hz)
Figure 17. ON/OFF Pin
(5.0V, 100Hz)
b) Switching the LED Current
Switching the LED current takes place via the external switch.
The constant must be determined, considering the ON resistance of the switch transistor.
V OUT
BD1603NUV
Figure 18. Brightness Control via the External Transistor
www.rohm.com
? 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
8/12
TSZ02201-0G3G0C200040-1-2
17.Dec.2012 Rev.001
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