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.