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TPS61176 Datasheet(PDF) 10 Page - Texas Instruments |
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TPS61176 Datasheet(HTML) 10 Page - Texas Instruments |
10 / 34 page UVLO / Internal Regulator Diode VIN Slope Compensation S R Q VOVP IFB1 PWM/EN Comp SW IFB2 IFB3 IFB4 IFB5 IFB6 EA R1 RSET EN VIN C2 1uF Current Sink C3 4.7uF OVP PGND IFB1 IFB2 IFB3 IFB4 IFB5 IFB6 GND C1 2.2uF VOUT OVP OVC COMP R2 VLDO Optional L C4 0.47uF Error Amp Detector Duty Control Circuit PWM Signal Generator Current Mirror Analog Dimming PWM dimming Dimming Control Current Sink Current Sink Current Sink Current Sink Current Sink LED Current regulation IFB no use Open /Short LED OVP Disable Detection Shut Down OSC Short to GND Protection OCP S OSC PWM decoding circuit Dimming Mode Selection C5 100pF 51k 82k MODE/FAULT Dimming Mode Detection R3 1M R4 43k Fault protection C6 2.2uF VOVP TPS61176 SLVSBM5B – DECEMBER 2012 – REVISED AUGUST 2015 www.ti.com 7.2 Functional Block Diagram 7.3 Feature Description 7.3.1 Supply Voltage The TPS61176 can support single-cell Li-ion battery input directly. It has a built-in linear regulator to generate supply for internal analog and logic circuits. The VLDO pin, output of the regulator, should be connected to a 1- µF bypass capacitor for the regulator to be controlled in a stable loop. VLDO pin does not have current sourcing capability for external use. If the device is used in a multi-cell battery system, the battery cannot be connected to VIN pin directly. In this case, connect a 3.3-V or 5-V power rail to bias the VIN pin and connect the battery voltage to the inductor. The VIN pin only consumes less than 3 mA for normal operation. Refer to Application and Implementation for more details. 10 Submit Documentation Feedback Copyright © 2012–2015, Texas Instruments Incorporated Product Folder Links: TPS61176 |
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