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TPS62134ARGTR Datasheet(PDF) 7 Page - Texas Instruments |
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TPS62134ARGTR Datasheet(HTML) 7 Page - Texas Instruments |
7 / 27 page Vref VID1 VID0 LPM EN SS VOS FBS SW SW PGND PGND AGND PVIN PVIN PG AVIN Gate drive Power control PG Control UVLO Thermal shutdown Soft start Reference voltage control logic Control logic FBS High-side limit Low-side limit Comparator Comparator Comparator Direct control and compensation ton DCS-Control + Vref Ramp Error amplifier R(DIS) Output discharge EN TPS62134A, TPS62134B, TPS62134C, TPS62134D www.ti.com SLVSC20D – JANUARY 2015 – REVISED MAY 2015 9 Detailed Description 9.1 Overview The TPS62134x synchronous switched-mode power converters are based on DCS-Control™ (direct control with seamless transition into power-save mode), an advanced regulation topology that combines the advantages of hysteretic, voltage-mode, and current-mode control including an AC loop that is directly associated to the output voltage. This control loop uses information about output voltage changes and feeds the information directly to a fast comparator stage. The control loop provides immediate response to dynamic load changes. For accurate DC load regulation, a voltage feedback loop is used. The internally compensated regulation network achieves fast and stable operation with small external components and low ESR capacitors. The DCS-Control™ topology supports PWM (pulse width modulation) mode for medium and heavy load conditions and a power-save mode (PSM) at light loads. During PWM mode, the devices operate at the nominal switching frequency in continuous conduction mode (CCM). This frequency is approximately 1 MHz (typical) with a controlled frequency variation depending on the input voltage. If the load current decreases, the converter enters PSM to sustain high efficiency down to very light loads. In PSM, the switching frequency decreases linearly with the load current. Because DCS-Control™ supports both operation modes within one single building block, the transition from PWM to PSM is seamless without effects on the output voltage. 9.2 Functional Block Diagram Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: TPS62134A TPS62134B TPS62134C TPS62134D |
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