UCD3138RMHT datasheet(6/78 Pages) TI1

6 / 78 page

UCD3138

SLUSAP2F – MARCH 2012 – REVISED NOVEMBER 2013

www.ti.com

Highly Integrated Digital Controller for Isolated Power

Check for Samples: UCD3138

Introduction

1.1

Features

– Synchronous Rectifier Soft On/Off

• Digital Control of up to 3 Independent

Feedback Loops

– Low IC Standby Power

– Dedicated PID based hardware

• Soft Start / Stop with and without Pre-bias

– 2-pole/2-zero configurable

• Fast Input Voltage Feed Forward Hardware

– Non-Linear Control

• Primary Side Voltage Sensing

• Up to 16MHz Error Analog to Digital Converter

• Copper Trace Current Sensing

(EADC)

• Flux and Phase Current Balancing for Non-

– Configurable Resolution as Small as

Peak Current Mode Control Applications

1mV/LSB

• Current Share Bus Support

– Automatic Resolution Selection

– Analog Average

– Up to 8x Oversampling

– Master/Slave

– Hardware Based Averaging (up to 8x)

• Feature Rich Fault Protection Options

– 14 bit Effective DAC

– 7 High Speed Analog Comparators

– Adaptive Sample Trigger Positioning

– Cycle-by-Cycle Current Limiting

• Up to 8 High Resolution Digital Pulse Width

– Programmable Fault Counting

Modulated (DPWM) Outputs

– External Fault Inputs

– 250ps Pulse Width Resolution

– 10 Digital Comparators

– 4ns Frequency Resolution

– Programmable blanking time

– 4ns Phase Resolution

• Synchronization of DPWM waveforms between

– Adjustable Phase Shift Between Outputs

multiple UCD3138 devices

– Adjustable Dead-band Between Pairs

• 14 channel, 12 bit, 267 ksps General Purpose

– Cycle-by-Cycle Duty Cycle Matching

ADC with integrated

– Up to 2MHz Switching Frequency

– Programmable averaging filters

• Configurable PWM Edge Movement

– Dual sample and hold

– Trailing Modulation

• Internal Temperature Sensor

– Leading Modulation

• Fully Programmable High-Performance

31.25MHz, 32-bit ARM7TDMI-S Processor

– Triangular Modulation

– 32 kByte (kB) Program Flash

• Configurable Feedback Control

– 2 kB Data Flash with ECC

– Voltage Mode

– 4 kB Data RAM

– Average Current Mode

– 4 kB Boot ROM Enables Firmware Boot-Load

– Peak Current Mode Control

in the Field via I2C or UART

– Constant Current

• Communication Peripherals

– Constant Power

– I2C/PMBus

• Configurable Modulation Methods

– 2 UARTs on UCD3138RGC (64-pin QFN)

– Frequency Modulation

– 1 UART on UCD3138RHA/UCD3138RMH

– Phase Shift Modulation

(40-pin QFN)

– Pulse Width Modulation

• Timer capture with selectable input pins

• Fast, Automatic and Smooth Mode Switching

• Up to 5 Additional General Purpose Timers

– Frequency Modulation and PWM

• Built In Watchdog: BOD and POR

– Phase Shift Modulation and PWM

• 64-pin QFN and 40-pin QFN packages

• High Efficiency and Light Load Management

• Operating Temperature: –40°C to 125°C

– Burst Mode

• Fusion_Digital_Power_Designer GUI Support

– Ideal Diode Emulation

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. 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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