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BCT3692B
High Efficiency, Support 0.3% PWM Dimming Boost WLED Driver
BCT3692B
High Efficiency, Support 0.3% PWM Dimming Boost WLED Driver
GENERAL DESCRIPTION
The BCT3692B is a white LED driver with integrated boost converter. With an internal 38V switch FET, the BCT3692B drives up a string of up to 10 LEDs in series. The boost converter runs at 1.1MHz fixed switching frequency to reduce output ripple, improve conversion efficiency, and allows for the use of small external components.
The default white LED current is set with the external sense resistor RSET, and the feedback voltage is regulated to 200mV, as shown in the typical application. During the operation, a pulse width modulation (PWM) signal can be applied to the CTRL pin through which the duty cycle determines the feedback reference voltage.
BCT3692B integrates built-in soft-start function to minimize the power supply inrush current. BCT3692B also integrates over-current protection , LED open protection and over temperature protection(OTP) to prevent chip from entering abnormal operating conditions.
APPLICATIONS
Cellular Phones
Ultra Mobile Devices
Portable Media Players
PDAs, GPS Receivers
White LED Backlighting
FEATURES
Support 0.3% PWM dimming
1.1MHz Switching Frequency
38V Over-voltage Protection for up to 10 LEDs in Series
200mV Reference Voltage
2.7V to 5.5V Input Voltage Range
Over-current and Over-temperature Protection
Built-in Soft-start Limits Inrush Current
Package Small TSOT23-6
