The TPS61140/1 is a dual output boost converter IC. · Two Outputs Each up to 27 V It is intended to be configured as a highly integrated · 0.7 A Integrated Switch power solution providing regulated voltage and current output with one boost converter. This device · Built-in Power Diode is ideal for driving the OLED sub display and WLED · 1.2 MHz PWM for WLED Driver backlight for the LCD main display in clam shell · PFM for OLED Supply phones. The voltage and current can be individually programmed through external resistors. There is a · Individually Programmable Output dedicated selection pin for each output, so the two · Input to Output Isolation outputs can be turned on separately or · Short-Circuit Protection simultaneously. When only the voltage output is enabled, the boost converter is controlled by pulse · Built-in Soft Start frequency modulation (PFM) in order to achieve high · Overvoltage Protection efficiency over a wide load range. If the current output · Up to 82% Efficiency is selected, the device adopts a 1.2 MHz pulse width · Up to 30 kHz PWM Dimming Frequency modulation control (PWM) method in order to maximize output current. Applying an external PWM · Available in a 10 Pin, 3 ´ 3 mm QFN Package signal to the select pin (SELI) reduces the output current thereby allowing WLED dimming. The TPS61140/1 has a built-in power MOSFET and · Clamshell Phone With OLED/LCD Screen power diode; thereby, eliminating the needs for any external active power components. In addition, the high switching frequency reduces the external inductor and capacitor sizes. Overall, the IC provides a highly compact solution with high efficiency and plenty of flexibility.