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TPS62130A Datasheet(PDF) 8 Page - Texas Instruments |
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TPS62130A Datasheet(HTML) 8 Page - Texas Instruments |
8 / 37 page control logic Soft start Thermal Shtdwn UVLO PG control power control error amplifier gate drive HS lim LS lim PVIN PVIN AVIN PG PGND PGND AGND comp comp + _ timer tON DCS - Control TM direct control & compensation comparator ramp SW SW SW EN * SS/TR DEF * LOG VOS FB * This pin is connected to a pull down resistor internally (see Feature Description section). Copyright © 2016, Texas Instruments Incorporated 8 TPS62130A-Q1, TPS62133A-Q1, TPS6213013A-Q1 SLVSCC2B – MAY 2014 – REVISED NOVEMBER 2016 www.ti.com Product Folder Links: TPS62130A-Q1 TPS62133A-Q1 TPS6213013A-Q1 Submit Documentation Feedback Copyright © 2014–2016, Texas Instruments Incorporated 9 Detailed Description 9.1 Overview The TPS6213xA-Q1 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 directly associated to the output voltage. This control loop takes information about output voltage changes and feeds it directly to a fast comparator stage. It sets the switching frequency, which is constant for steady state operating conditions, and provides immediate response to dynamic load changes. To get 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 at light loads. During PWM, it operates at its nominal switching frequency in continuous conduction mode. This frequency is typically about 2.5 MHz with a controlled frequency variation depending on the input voltage. If the load current decreases, the converter enters Power Save Mode to sustain high efficiency down to very light loads. In Power Save Mode the switching frequency decreases linearly with the load current. Since DCS-Control™ supports both operation modes within one single building block, the transition from PWM to Power Save Mode is seamless without effects on the output voltage. 9.2 Functional Block Diagram Figure 7. TPS62130A-Q1 (Adjustable Output Voltage) |
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