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参数资料
| 型号： | FAN5701UC08X |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR MULTI 8MA 16-WLCSP |
| 标准包装： | 3,000 |
| 拓扑： | PWM，切换式电容器（充电泵） |
| 输出数： | 6 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 900kHz ~ 1.5MHz |
| 电源电压： | 2.7 V ~ 5.5 V |
| 输出电压： | 2 V ~ 4 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-UFBGA，WLCSP |
| 供应商设备封装： | 16-WLCSP |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
Circuit Description
The FAN5701 is a white LED driver system based upon an
adaptive 1.5x/1x charge pump capable of supplying up to
180mA of total output current. The tightly matched current
sinks ensure uniform brightness across the LEDs. Each
LED is configured in a common anode configuration with
its peak drive current set during manufacturing ( see
Ordering Information and I SET ).
Charge Pump
The charge pump operates in either 1x mode, where
VOUT is connected to VIN through a bypass switch, or in
1.5x mode. The circuit operates in 1x mode until the LED
with the highest forward voltage (V LED(MAX) ) can no longer
maintain current regulation. At that point, 1.5x mode
begins. If the lowest active cathode voltage is greater than
1.8V, the charge pump switches back to 1x mode.
In addition to hysteresis, a 1ms transition delay is provided
for the device to ignore short-duration input voltage drops
in deciding mode transitions.
IC Enable
When the EN pin is LOW, all circuit functions are disabled.
When the EN pin HIGH, the entire chip is enabled. Both
PWM inputs are now functional.
? 2009 Fairchild Semiconductor Corporation
FAN5701 ? Rev. 1.0.3
PWM Dimming
External PWM inputs (group A and group B) directly modulate
output currents in their corresponding LED channels to vary the
perceived LED brightness. Two PWM inputs are provided to
control two independent groups of LEDs, such as that of a
main display panel and a secondary panel. They can also be
connected to a single input to simultaneously dim all six LED
outputs.
V OUT Short-Circuit Protection
The FAN5701 has integrated protection circuitry to prevent the
device from being short circuited when the output voltage falls
below 2V. If this occurs FAN5701 turns off the charge pump
and the LED driver outputs, but a small bypass switch is left
on. The device monitors the output voltage to determine if it is
still in short circuit condition and, once it has passed, FAN5701
soft-starts and returns to normal operation.
V OUT Over-Voltage Protection
If the output voltage goes above 6V, the FAN5701 shuts down
until this condition has passed. The charge pump and LED
driver outputs are turned off. Once this condition has passed,
FAN5701 soft-starts into normal operation.
www.fairchildsemi.com
9
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相关代理商/技术参数 |
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|---|---|
| FAN5701UC15X | 功能描述:LED照明驱动器 Compact 6Ch LED Drvr for Mobile Handsets 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 |
| FAN5701UC20X | 功能描述:LED照明驱动器 Compact 6-Chan LED Drvr; Mobile Handset 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 |
| FAN5701UC30X | 功能描述:LED照明驱动器 Compact 6Ch LED Drvr for Mobile Handsets 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 |
| FAN5701UMP08X | 功能描述:LED照明驱动器 Config. 180mA 6-LED Driver w/I2C Control 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 |
| FAN5701UMP15X | 功能描述:LED照明驱动器 Config. 180mA 6-LED Driver w/I2C Control 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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