STCF05中文资料HIGH POWER WHITE LED DRIVER WITH I2C INTERFACE数据手册ST规格书

描述 Description

The STCF05 is a high efficiency power supply solution to drive multiple flash LEDs in camera phones, PDAs and other hand-held devices. The synchronous boost topology with output current control guarantees the proper LED current over all possible conditions of battery level and LED forward voltage. All the functions of the device are controlled through the I²C bus that allows to reduce logic pins on the package and to save PCB traces on the board. Hard and soft-triggering of the flash are both supported. The device includes many functions to protect the chip and the power LEDs. These comprehend a soft-start control, chip over temperature detection and protection, open and shorted LEDs detection and protection. In addition, a digital programmable time-out function protects the LEDs in case of wrong command from microprocessor. See description (continued).

特性 Features

• Boost DC-DC converter with synchronous rectification
• Drives 2 power white LEDs in series with a current up to 400 mA
• Input voltage range 2.5 V to 5.5 V
• Needs 3 external components only
• Output current control
• 1.8 MHz fixed frequency PWM control
• Peak inductor current limited to 3 A
• Full I²C control
• Operational modes:
• Standby mode
• Standby mode with NTC
• Flash mode: up to 400 mA
• Torch mode: up to 120 mA
• Soft and hard triggering of flash
• Flash and Torch dimming in 15 exponential steps
• Dimmable red LED indicator auxiliary output
• Internally or externally timed flash operation
• Digitally programmable safety time-out in flash mode
• LED overtemperature detection and protection with external NTC resistor
• Open and shorted LED failure detection and protection
• Chip overtemperature detection and protection
• Less than 1 μA standby current
• Package 3 x 3 mm TFBGA25

简介

STCF05属于集成电路（IC）的LED驱动器。由制造生产的STCF05LED 驱动器器件属于 LED 驱动器电源管理集成电路 (PMIC) 系列，可通过标称固定电压的电源为负载（通常为发光二极管）提供电流，并且电流可控。它与用于电压调节的类似产品的主要区别在于，这类器件提供较低的反馈电压（以提高系统能效），而且通常可对器件工作点进行外部控制，可在照明应用中用于实现调光功能。