Features
Support 0.3% PWM dimming
200mV Reference Voltage
Up to 89% Efficiency for 2P7S LEDs
PWM control input for CABC operation
1.1MHz Switching Frequency
38V Over-voltage Protection for up to 10 LEDs in Series
2.7V to 5.5V Input Voltage Range
Over-current and Over-temperature Protection
Built-in Soft-start Limits Inrush Current
Low θJA of AW9967FSR compared with WB-SOT package
DFN 2mm X2mm X0.75mm-6L & SOT23-5L package
Description
The AW9967 is a white LED (WLED) driver with integrated boost converter. The boost converter runs at 1.1MHz fixed switching frequency, with an internal 40V, 2.7A switch FET, the AW9967 can drive one string (up to 10 LEDs) and parallel LED strings.
The full-scale WLED current can be set by the equation 200mV/RSET. RSET should be changed for parallel applications.
The current of WLED can also be set with duty cycle of PWM signal applied to the CTRL pin with 10kHz~100kHz.
AW9967 integrates built-in soft-start function to minimize the power supply inrush current. AW9967 also integrates over-current protection, LED open protection and over temperature protection(OTP) to prevent chip from entering abnormal operating conditions.
The AW9967FSR has better thermal dissipation compared with common WB-SOT package.
