UCD3138A Controller Datasheet

UCD3138A Datasheet PDF, Equivalent


Part Number

UCD3138A

Description

Highly-Integrated Digital Controller

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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UCD3138A
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UCD3138A
SLUSC66E – MARCH 2015 – REVISED FEBRUARY 2017
UCD3138A Highly-Integrated Digital Controller for Isolated Power
1 Device Overview
1.1 Features
1
• Digital Control of up to 3 Independent Feedback
Loops
– Dedicated PID-Based Hardware
– 2-Pole, 2-Zero Configurable
– Nonlinear Control
• Soft-Start and Soft-Stop with and without Prebias
• Fast Input Voltage Feed Forward Hardware
• Synchronous Rectifier Dead Time Optimization
Peripheral to Use with UCD7138 Synchronous
Rectifier Driver
• Up to 16 MHz Error Analog-to-Digital Converter
(EADC)
– Configurable Resolution as Small as 1 mV/LSB
– Automatic Resolution Selection
– Up to 8× Oversampling
– Hardware-Based Averaging (up to 8×)
– 10-Bit Effective DAC With 4 Bits of Dither
– Adaptive Sample Trigger Positioning
• 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 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
– Frequency Modulation and Phase-Shift
Modulation
1
• High Efficiency and Light Load Management
– Burst Mode
– Ideal Diode Emulation
– Synchronous Rectifier Soft On/Off
– Low IC Standby Power
• Primary Side Voltage Sensing
• Copper Trace Current Sensing
• Flux and Phase Current Balancing
• Current Share Bus Support
– Average or Master and Slave
• Feature Rich Fault Protection Options
– 7 High-Speed Analog Comparators
– Cycle-by-Cycle Current Limiting
– Programmable Fault
– External Fault Capability
– 10 Digital Comparators
– Programmable Blanking Time
• Synchronization of DPWM Waveforms Between
Multiple UCD3138A devices
• 14-Channel, 12-Bit, 267-ksps General-Purpose
ADC
– Programmable Averaging Filters
– Dual Sample and Hold
• Internal Temperature Sensor
• Fully Programmable High-Performance 31.25-
MHz, 32-Bit ARM7TDMI-S™ Processor
– 32 KB of Program Flash
– 2 KB of Data Flash with ECC
– 4 KB of Data RAM
– Firmware Boot-Load in the Field via PMBus or
UART
• Communication Peripherals
– PMBus
– 1 UART
• UART Auto-baud Rate Adjustment
• 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 Package
• Operating Temperature: –40°C to +125°C
• Debug Interface
– Code Composer Studio™ with JTAG Interface
– Fusion Digital Power™ Designer GUI Support
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.

UCD3138A
UCD3138A
SLUSC66E – MARCH 2015 – REVISED FEBRUARY 2017
www.ti.com
1.2 Applications
• Power Supplies and Telecom Rectifiers
• Power Factor Correction
• Isolated DC-DC Modules
1.3 Description
The UCD3138A is a digital power supply controller from Texas Instruments offering superior levels of
integration and performance in a single-chip solution. The flexible nature of the UCD3138A makes it
suitable for a wide variety of power conversion applications. In addition, multiple peripherals inside the
device have been specifically optimized to enhance the performance of AC-DC and isolated DC-DC
applications and reduce the solution component count in the IT and network infrastructure space.
The UCD3138A controller is a fully programmable solution offering customers complete control of their
application, along with ample ability to differentiate their solution. At the same time, TI is committed to
simplifying our customers' development effort by offering best-in-class development tools, including
application firmware, Code Composer Studio™ software development environment, and TI’s power
development GUI which lets customers configure and monitor key system parameters.
At the core of the UCD3138A controller are the digital control loop peripherals, also known as Digital
Power Peripherals (DPPs). Each DPP implements a high-speed digital control loop consisting of a
dedicated error analog-to-digital converter (EADC), a PID-based 2-pole-2-zero digital compensator and
DPWM outputs with 250-ps pulse width resolution. The device also contains a 12-bit, 267-ksps general-
purpose ADC with up to 14 channels, timers, interrupt control, PMBus, and UART communications ports.
The device is based on a 32-bit ARM7TDMI-S RISC microcontroller that performs real-time monitoring,
configures peripherals, and manages communications. The ARM microcontroller executes its program out
of programmable flash memory as well as on-chip RAM and ROM.
In addition to the DPP, specific power management peripherals have been added to enable high efficiency
across the entire operating range, high integration for increased power density, reliability, and lowest
overall system cost and high flexibility with support for the widest number of control schemes and
topologies. Such peripherals include: light load burst mode, synchronous rectification, automatic mode
switching, input voltage feed forward, copper trace current sense, ideal diode emulation, constant current
constant power control, synchronous rectification soft on and off, peak current mode control, flux
balancing, secondary side input voltage sensing, high-resolution current sharing, hardware-configurable
soft-start operation with pre-bias, as well as several other features. The device optimizes topology support
for voltage mode and peak current mode controlled phase-shifted full bridge, single and dual phase PFC,
bridge-less PFC, hard-switched full bridge and half bridge, and LLC half bridge and full bridge.
The UCD3139A is a functional variant of the UCD3138A Digital Power Controller that includes significant
improvements over the UCD3138 device For a description of the complete changes made in the
UCD3138A, refer to UCD3138A Migration Guide.
DEVICE NUMBER
UCD3138A
Device Information(1)
PACKAGE DRAWING
PACKAGE TYPE
RGC
RJA
VQFN (64)
VQFN (40)(3)
RMH
WQFN (40)
BODY SIZE
9.00 mm × 9.00 mm
6.00 mm × 6.00 mm
6.00 mm × 6.00 mm
(1) For all available packages, see the orderable addendum at the end of the datasheet.
(2) 40-pin 6 x 6 x 0.75 mm ultra-thin QFN with corner anchors optimized for IPC9592A Temperature Cycle Testing.
(3) Recommended for new 40-pin designs, optimized for improved performance under temperature cycling test for board level reliability
(BLR).
2 Device Overview
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Product Folder Links: UCD3138A
Copyright © 2015–2017, Texas Instruments Incorporated


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity UCD3138A SLUSC66E – MARCH 201 5 – REVISED FEBRUARY 2017 UCD3138A Hi ghly-Integrated Digital Controller for Isolated Power 1 Device Overview 1.1 Features 1 • Digital Control of up to 3 Independent Feedback Loops – Dedic ated PID-Based Hardware – 2-Pole, 2-Z ero Configurable – Nonlinear Control • Soft-Start and Soft-Stop with and w ithout Prebias • Fast Input Voltage F eed Forward Hardware • Synchronous Re ctifier Dead Time Optimization Peripher al to Use with UCD7138 Synchronous Rect ifier Driver • Up to 16 MHz Error Ana log-to-Digital Converter (EADC) – Con figurable Resolution as Small as 1 mV/L SB – Automatic Resolution Selection Up to 8× Oversampling – Hardware- Based Averaging (up to 8×) – 10-Bit Effective DAC With 4 Bits of Dither – Adaptive Sample Trigger Positioning Up to 8 High-Resolution Digital Pulse Width Modulated (DPWM) Outputs – 250-ps Pulse Width Resolution – 4-ns Frequency and Phase Resoluti.
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