TPS60250

TPS60250 TPS60252 www.ti.com............................................................................................................................................................ SLVS769C – APRIL 2007 – REVISED APRIL 2008 HIGH EFFICIENCY CHARGE PUMP FOR 7 WLEDs WITH I2C INTERFACE FEATURES 1 3.0 V to 6.0 V Input Voltage Range ×1 and ×1.5 Charge Pump Fully Programmable Current with I2C – 64 Dimming Steps with 25mA Maximum (Sub and Main Display Banks) – 4 Dimming Steps with 80mA Maximum (DM5 for Auxiliary Application) 2% Current Matching for Sub LEDs at Light Load Condition (Each 100µA) 750 kHz Charge Pump Frequency Continuous 230mA Maximum Output Current Auto Switching Between ×1 and ×1.5 Mode for Maximum Efficiency Built-in Soft Start and Current Limit Open Lamp Detection 16-Pin 3mm x 3mm QFN TPS60250 (I2C Slave Address: 1110111) TPS60252 (I2C Slave Address: 1110110) APPLICATIONS Cellular Phones PDA, PMP, GPS (Up To 4 Inch LCD Display) Multidisplay Handheld Devices DESCRIPTION The TPS60250/2 are high efficiency, constant frequency charge pump DC/DC converters that use dual mode 1× and 1.5× conversions to maximize efficiency over the input voltage range. The devices drive up to five white LEDs for the main display and up to two white LEDs for the sub display with regulated constant current for uniform intensity. By utilizing adaptive 1×/1.5× charge pump modes and very low-dropout current regulators, the TPS60250/2 achieve high efficiency ov...