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TPS61151DRCT Datasheet(PDF) 1 Page - Texas Instruments |
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TPS61151DRCT Datasheet(HTML) 1 Page - Texas Instruments |
1 / 21 page www.ti.com FEATURES TYPICAL APPLICATION APPLICATIONS DESCRIPTION Vin SW Gnd SEL2 SEL1 ISET1 IFB1 R1 Iout IFB2 ISET2 R2 2.5Vto6V Input L110 H m C1 1 F m C2 1 F m TPS61150, TPS61151 SLVS625A – FEBRUARY 2006 – REVISED MARCH 2007 DUAL OUTPUT BOOST WLED DRIVER USING SINGLE INDUCTOR In addition to the small inductor, small capacitor and 3 mm x 3 mm QFN package, the built-in MOSFET • 2.5-V to 6-V Input Voltage Range and diode eliminate the need for any external power • Two Outputs Each up to 27 V devices. Overall, the IC provides an extremely compact solution with high efficiency and plenty of • 0.7-A Integrated Switch flexibility. • Built-In Power Diode • 1.2-MHz Fixed PWM Frequency • Individually Programmable Output Current • Input-to-Output Isolation • Built-In Soft Start • Overvoltage Protection • Up to 83% Efficiency • Up to 30 kHz PWM Dimming Frequency • Available in a 10 Pin, 3 × 3 mm QFN Package • Sub and Main Display Backlight in Clam Shell Phones • Display and Keypad Backlight • Up to 14 WLED Driver The TPS61150/1 is a high frequency boost converter with two regulated current outputs for driving WLEDs. Each current output can be individually programmed through external resistors. There is dedicated selection pin for each output, so the two outputs can be turned on separately or simultaneously. The output current can be reduced by a pulse width modulation (PWM) signal on the select pins or an analog voltage on the ISET pin, resulting in PWM dimming of the WLEDs. The boost regulator runs at 1.2 MHz fixed switching frequency to reduce output ripple and avoid audible noises associated with PFM control. The two current outputs are ideal for driving WLED backlight for the sub and main displays in clam shell phones. The two outputs can also be used for driving display and keypad backlights. When used together, the two outputs can drive up to 14 WLED for one large display. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2006–2007, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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