GR5401A Datasheet | grenergy

Preliminary GR5401A 1.4A Boost for White LED Driver Features 2.5V to 5.5V operating input voltage range Drives up to 8 series White LEDs 1.0MHz Fixed Switching Frequency Wide range for PWM dimming (200Hz to 200KHz) Internal 1.4A switching current limit Over Voltage Protection (OVP) Internal Soft-start Function Current limit and Thermal shutdown protection Under voltage Lockout APPLICATIONS Cellular Phones Digital Cameras Tablet PC and Handheld puters PDA, DVD and GPS Receivers Portable Instruments Description The GR5401A is a high frequency, asynchronous boost converter. The internal MOSFET can support up to 8 White LEDs for backlighting and OLED power application, and the internal soft start function can reduce the inrush current. The GR5401A uses current mode, 1.0MH Z fixed frequency architecture to regulate the LED current, which is set through an external current sense resistor. Its low 200m V feedback voltage reduces power loss and improves efficiency. The OVP pin monitors...