1 Features

1• 64 kB and 128 kB Program Flash Derivative of

UCD3138 Family

– 2-32 kB or 4-32 kB Program Flash Memory

Banks

– Supports Execution From 1 Bank, While

Programming Another

– Capability to Update Firmware Without

Shutting Down the Power Supply

– Additional Communication Ports Compared to

the UCD3138 (+1 SPI, +1 I2C)

– Boot Flash Based Dual Memory Image

Support for ‘On the Fly’ Firmware Updates

• Digital Control of up to 3 Independent Feedback

Loops

– Dedicated PID Based Hardware

– 2-pole/2-zero Configurable, Non-Linear Control

• Up to 16 MSPS Error A/D Converter (EADC)

– Configurable Resolution (min: 1mV/LSB)

– Up to 8x Oversampling and Adaptive Sample

Positioning

– Hardware Based Averaging (up to 8x)

– 14 bit Effective Reference DAC

• Up to 8 High Resolution Digital Pulse Width

Modulated (DPWM) Outputs

– 250 ps Pulse Width Resolution

– 4 ns Frequency and Phase Resolution

– Adjustable Phase Shift and Dead-bands

– Cycle-by-Cycle Duty Cycle Matching

– Up to 2 MHz Switching Frequency

• Configurable Trailing/Leading/Triangular

Modulation

• RTC support

• Configurable Feedback Control

– Voltage, Average Current and Peak Current

Mode Control

– Constant Current, Constant Power

• Configurable FM, Phase Shift Modulation and

PWM

• Fast, Automatic and Smooth Mode Switching

– Frequency Modulation and PWM

– Phase Shift Modulation and PWM

• High Efficiency and Light Load Management

– Burst Mode & Ideal Diode Emulation

– Synchronous Rectifier Soft On/Off

– Low IC Standby Power

• Primary Side Voltage Sensing

• Current Share (Average & Master/Slave)

• Feature Rich Fault Protection Options

– 7 Analog / 4 Digital Comparators,

– Cycle-by-Cycle Current Limiting

– Programmable Blanking Time and Fault

Counting

– External Fault Inputs

• Synchronization of DPWM Waveforms Between

Multiple UCD3138x Devices

• 15 channel, 12 bit, 267 ksps General Purpose

ADC

• Internal Temperature Sensor

• Fully Programmable High-Performance 31.25

MHz, 32-bit ARM7TDMI-S Processor

– 64 kB Program Flash (2-32 kB Banks)

– 2 kB Data Flash with ECC

– 8 kB Data RAM

– 4 kB Boot ROM Enables Firmware Boot-Load

• Communication Peripherals,

– 2 - I2C/PMBus interfaces

– 2 - UARTs, 1 - SPI

• Timer Capture with Selectable Input Pins

• 80-pin QFP Package

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

2 Applications

• Power Supplies and Telecom Rectifiers

• Power Factor Correction

• Isolated DC-DC Modules

• Phase Shifted Full Bridge with Peak Current Mode

Control, LLC, HSFB, Forward, etc.