EUP2537

EUP2537 bkf 10 White LED Boost Converter with PWM Dimming DESCRIPTION The EUP2537 is a constant current step-up converter specifically designed to drive white LEDs. With a 45V rated integrated switch FET, the step-up converter supports up to 10 white LEDs in series connection, so the LED currents are identical for uniform brightness. The boost converter runs at 1.0MHz fixed switching frequency with 1.3A switch current limit, and allows for the use of a high brightness LED in general lighting. The maximum white LED current is set with the external sensor resistor RFB, and the feedback voltage is regulated to 200mV, as shown in the typical application. During the operation, the LED current can be controlled through the EN pin with a 8KHz or higher frequency PWM dimming signal on EN pin, EUP2537 operates in PWM dimming mode, which the duty cycle determines the feedback reference voltage. The EUP2537 does not generate audible noises on the output capacitor. For the protection, the EUP253...