GL7201 Datasheet | Gleam

Gleam Power Management GL7201 1W High Power White LED Driver Description The GL7201 is a step-up DC-DC converter that delivers a regulated output current. The device switches at a 1.0MHz constant frequency, allowing for the use of small value external inductor and ceramic capacitors. The GL7201 is targeted to be used for driving 1W white LED from a 0.9V to 3.2V input. The LED current can be programmed by the external current sense resistor, Rs, connected between the feedback pin (FB) and ground. A low 95m V feedback voltage reduces the power loss in the Rs for better efficiency. With its internal 2A, 100mΩ NMOS switch, the device can provide high efficiency even at heavy load. LED dimming can be done by using a DC voltage applied to the FB pin and a pulse width modulation (PWM) signal applied to the FB pin or SHDN pin. During the shutdown mode, the feedback resistor Rs and the load are pletely disconnected and the current consumption is reduced to less than 1u A. The GL7201 is available in the 6-lead SOT-23-6 package. Features LED Power Efficiency: up to 90% Internal 2A MOSFET Switch 1.0MHz Switching Frequency Low Start-Up Voltage: 0.9V Low RDS(ON) : 100mΩ (TYP.) Open LED Protection Over Temperature Protection Low Profile SOT-26 Package Application White LED Torch (Flashlight) White LED Camera Flash DSC(Digital Still Camera)Flash Cellular Camera Phone Flash PDA Camera Flash Camcorder Torch(Flashlight) Lamp GL7201 V1.0 TYPICAL APPLICATIONS 2.2μH L1 SW Vsw Vin + CIN 10μF FB EN GND 1W WLED CO+UT 10μF Rs Block Diagram Gleam Power Management GL7201 1W High Power White LED Driver MARKING INFORMATION & PIN CONFIGURATIONS SOT-26 (SOT-23-6) Vin Vout EN 6 54 XXVYW 123 SW GND...