STCF02 HIGH POWER WHITE LED DRIVER
The STCF02 is a high efficiency power supply solution to drive a single flash LED in camera phone, PDAs and other hand-held devices. It is a buck-boost converter that guarantees a proper LED current control over the battery voltage (particularly in the case, when the output voltage is lower than the input voltage); the output current control ensures a good current regulation over the forward voltage spread characteristics of the Flash LED.
Three logic input signals can select 5 modes of operation: Shutdown mode (quiescent current less than 1μA typ), Shutdown mode with NTC active, Torch mode (drives the LED up to 250mA), Flash mode (up to 600mA), and Medium flash mode (reduces the flash current).
This highly efficient converter is able to accept input current from the battery (lower than 1.5A), while limiting the peak inductor current to 2.3A (typ). Other features include Soft start control, thermal shutdown, short circuit protection, overvoltage protection, and LED temperature protection. An alternative to LED temperature protection is that a safety flash time-out feature can be implemented instead. This device is available in a QFN20, 4mm x 4mm, no-lead package (height is less than 1mm).
技术特性
- Buck-boost DC/DC Converter
- Drives one power white led: up to 600mA between 2.7 to 4.5V
- Led temperature protection
- Output current control
- 1.8 MHz (typ) fixed frequency PWM
- Synchronous rectification
- High efficiency across the total input voltage range
- Operational modes:
- Adjustable current in all three modes
- LED disconnected from the battery in shutdown mode
- Programmable safety shutdown in flash mode
- LED short and open circuit protection
- Overvoltage protection
- < 1µA Shutdown current
- QFN20 4mm x 4 mm package
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功能框图
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STCF02 订购信息
| 订购型号 |
产品状态 |
美金价格 |
数量 |
封装 |
包装形式 |
温度范围 |
材料声明 |
| STCF02PNR |
Preview |
|
1000 |
VFQFPN 20 4x4x1.0 |
Tape And Reel |
-40 °C-85 °C |
STCF02PNR |
DATASHEET
| 描述 |
版本 |
大小 |
| STCF02 : High power white led driver |
6 |
739KB |
APPLICATION NOTES
| 描述 |
版本 |
大小 |
| AN2304: LED driver for single flash |
4 |
410KB |
BOARDS AND TOOLS
