YB1521 - High Power Step-Up DC-DC Converter & WLED Driver
The YB1521 is a step-up DC-DC converter which operating as current source to drive up 45 white LEDs (3S15P) in parallel / series configuration from a 5V system rail.
Series connecting of LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resisto
YB1521 Features
* 2.5V to 5.5V Input Voltage Range Built In Power MOSFET Drive Up to 15V @400mA at 5V Vin Less than 1µA Shutdown Current Up to 94% efficiency Over Voltage Protection@18V UVLO, Thermal Shutdown Internal 1.6A Current Limit 200mv Low Reference Voltage Built In Soft Start PWM Dimming SOT23-5 Package Green
