UCD3138 Highly Integrated Digital Controller for Isolated Power

1 Features

Digital Control of up to 3 Independent Feedback Loops
- Dedicated PID-Based hardware
- 2-Pole/2-Zero Configurable
- Nonlinear Control
Up to 16 MHz Error Analog-to-Digital Converter (EADC)
- Configurable Resolution as Small as 1mV/LSB
- Automatic Resolution Selection
- Up to 8x Oversampling
- Hardware-Based Averaging (up to 8x)
- 14-Bit Effective Digital-to-Analog Converter (DAC)
- Adaptive Sample Trigger Positioning
Up to 8 High Resolution Digital Pulse Width Modulated (DPWM) Outputs
- 250-ps Pulse Width Resolution
- 4-ns Frequency Resolution
- 4-ns Phase Resolution
- Adjustable Phase Shift Between Outputs
- Adjustable Dead-band Between Pairs
- Cycle-by-Cycle Duty Cycle Matching
- Up to 2-MHz Switching Frequency
Configurable PWM Edge Movement
- Trailing Modulation
- Leading Modulation
- Triangular Modulation
Configurable Feedback Control
- Voltage Mode
- Average Current Mode
- Peak Current Mode Control
- Constant Current
- Constant Power
Configurable Modulation Methods
- Frequency Modulation
- Phase Shift Modulation
- Pulse Width Modulation
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
Soft Start / Stop with and without Prebias
Fast Input Voltage Feed Forward Hardware
Primary Side Voltage Sensing
Copper Trace Current Sensing
Flux and Phase Current Balancing for Nonpeak Current Mode Control Applications
Current Share Bus Support
- Analog Average
- Master and Slave
Feature Rich Fault Protection Options
- 7 High-Speed Analog Comparators
- Cycle-by-Cycle Current Limiting
- Programmable Fault Counting
- External Fault Inputs
- 10 Digital Comparators
- Programmable Blanking Time
Synchronization of DPWM Waveforms Between Multiple UCD3138 family devices
14-Channel, 12-Bit, 267-ksps General-Purpose ADC with Integrated
- Programmable Averaging Filters
- Dual Sample and Hold
Internal Temperature Sensor
Fully Programmable High-Performance 31.25 MHz, 32-Bit ARM7TDMI-S™ Processor
- 32KB of Program Flash
- 2KB of Data Flash with ECC
- 4KB of Data RAM
- 4KB of Boot ROM Enables Firmware Boot-Load in the Field via I²C or UART
Communication Peripherals
- I²C/PMBus
- 2 UARTs on UCD3138RGC (64-Pin QFN)
- 1 UART on UCD3138RHA/UCD3138RMH
  (40-Pin QFN) and UCD3138RJA (40-Pin VQFN)
Timer Capture with Selectable Input Pins
Up to 5 Additional General Purpose Timers
Built In Watchdog: BOD and POR
64-Pin QFN and 40-Pin QFN Packages
Operating Temperature: –40°C to 125°C
Fusion Digital Power Studio GUI Support

2 Applications

Power Supplies and Telecom Rectifiers
Power Factor Correction
Isolated DC-DC Modules