Texas Instruments UCD3138A Highly Integrated Digital Controller

Texas Instruments UCD3138A Highly Integrated Digital Controller is a digital power supply controller 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. This will reduce the solution component count in the IT and network infrastructure space. Texas Instruments UCD3138A Highly Integrated Digital Controller is a fully programmable solution offering customers complete control of their application.

Features

Digital control of up to 3 independent feedback loops:
- Dedicated PID-based hardware
- 2-Pole/2-Zero configurable
- Nonlinear control
Soft start / 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 16MHz Error Analog-to-Digital Converter (EADC):
- Configurable resolution as small as 1 mV/LSB
- Automatic resolution selection
- Up to 8x oversampling
- Hardware-based averaging (up to 8x)
- 10-Bit effective DAC with 4-Bits of Dither
- Adaptive sample trigger positioning
Up to 8 high-resolution Digital Pulse Width Modulated (DPWM) outputs:
- 250ps pulse width resolution
- 4ns frequency and phase resolution
- Adjustable phase shift between outputs
- Adjustable dead-band between pairs
- Cycle-by-Cycle duty cycle matching
- Up to 2MHz 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
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
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 31.25MHz, 32-Bit ARM7TDMI-S processor:
- 32KB of program flash
- 2KB of data flash with ECC
- 4KB of Data RAM
- Firmware Boot-load in the field via I²C or UART
Communication peripherals:
- I²C/PMBus
- 2 UARTs on UCD3138ARGC (64-Pin QFN)
- 1 UART on UCD3138ARMH (40-Pin QFN)
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 packages
40-Pin QFN ICP9592A T/C qualification
Operating temperature: -40°C to 125°C
Debug interface:
- Code Composer Studio™ with JTAG interface
- Fusion Digital Power™ designer GUI support