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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
UCD3138
SLUSAP2H –MARCH 2012–REVISED OCTOBER 2016
UCD3138 Highly Integrated Digital Controller for Isolated Power
1 Device Overview
1
1.1 Features
1
• 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 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 I
2
C or UART
• Communication Peripherals
– I
2
C/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_Designer GUI Support
页面指南
