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.