TPS62902-Q1 datasheet(12/54 Pages) TI

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8 Detailed Description

8.1 Overview

The TPS62902-Q1 synchronous switched mode power converters are based on DCS-Control (Direct Control

with Seamless Transition into power save mode). DCS-Control is an advanced regulation topology that

combines the advantages of hysteretic, voltage mode, and current mode control. This control loop takes

information about output voltage changes and feeds the information directly to a fast comparator stage. DCS-

Control 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.

8.2 Functional Block Diagram

SS/TR

VIN

GND

VOS

–

Ref

1.0V

Power Control

Power Save Mode

Forced PWM

100% Mode

HS Limit

LS Limit

Direct

Control

TON timer

VFB

VREF

DCS-Control

Device Control

and Logic

Smart-Enable

Ref-System

UVLO

Start-up Handling

Smart-CONFIG

PG-Control

Thermal Shutdown

Device

Control

Resistor-to-Digital

MODE Detection

Internal/External

Divider

Resistor-to-Digital

Gate

Driver

MODE / S-CONF

FB / VSET

VFB

TPS62902-Q1

SLVSG70 – APRIL 2023

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