TI UCD3138128PFC

The UCD3138 series is a digital power controller that offers high integration and excellent performance in a single-chip solution. The UCD3138A64 in the UCD3138x can provide 64kB of program flash memory (the UCD3138128 can provide 128KB of program flash memory), as well as other communication options such as SPI and another I²C port. With the program flash memory in multiple 32kB groups, designers can implement dual images of the firmware in the device (e.g., one main image + one backup image) and can choose to execute from either group using appropriate algorithms. It also creates a unique opportunity for the processor to load a new program and then execute it without interrupting power delivery. This feature enables end-users to add new features to the power supply in the field while eliminating any downtime required to load a new program. The flexible features of the UCD3138 series make this device suitable for a wide range of power conversion optimizations. In addition, the various peripherals within the device have been specifically optimized to enhance the performance of AC/DC and isolated DC/DC applications and reduce the number of solution components in the information technology (IT) and network infrastructure space. The UCD3138 series is a fully programmable solution that allows users to have full control over related applications while also differentiating their solutions. On the controller core is the Digital Power Peripheral (DPP). Each DPP executes a high-speed digital control loop, which consists of a dedicated Error Analog-to-Digital Converter (EADC), a 2-pole - 2-zero digital compensator based on PID, and a DPWM output with a pulse width resolution of 250ps. This device also includes a 12-bit, 267ksps general-purpose ADC with up to 15 channels, timers, interrupt control, PMBus, I²C, SPI, and UART communication ports. This device is based on a 32-bit ARM7TDMI - S Reduced Instruction Set Computer (RISC) microcontroller that performs real-time monitoring, configures peripherals, and manages communication. The ARM microcontroller executes its programs from the programmable flash memory as well as the on-chip RAM and ROM. In addition to the DPP, specific power management peripherals have been added to enable high efficiency, high integration for increased power density, reliability, and the lowest overall system cost across the entire operating range, as well as high flexibility to support the widest number of control architectures and topologies. Such peripherals include: light-load burst mode, synchronous rectification, LLC and phase-shifted full-bridge mode switching, input voltage feedforward, over-copper trace current sensing, ideal diode emulation, constant current constant power control, synchronous rectification soft turn-on and turn-off, peak current mode control, flux balancing, secondary-side input voltage sensing, high-resolution current sharing, hardware-configurable soft start with pre-bias, and several other functions. Topology support has been optimized for voltage-mode and peak current-mode controlled phase-shifted full bridges, single and dual-phase Power Factor Correction (PFC), bridgeless PFC, hard-switched full and half bridges, active clamp forward converters, dual-switch forward converters, and LLC half and full bridges.

• 64kB and 128kB program flash derivatives of the UCD3138 family
• 2 × 32kB or 4 × 32kB program flash memory banks
• Supports execution from bank 1 while programming other banks
• Firmware update without power cycle
• Additional communication ports versus UCD3138: +1 SPI, +1 I²C
• Boot flash-based dual memory image support for "fast" firmware update
• Digital control of up to 3 independent feedback loops
• Dedicated PID-based hardware
• 2-pole/2-zero configurable, non-linear control
• Up to 16MSPS error A/D converter (EADC)
• Configurable resolution (minimum: 1mV/LSB)
• Up to 8× oversampling and adaptive sampling positioning
• Hardware-based averaging (up to 8×)
• 14-bit high-efficiency reference DAC
• Up to 8 high-resolution DPWM outputs
• 250ps pulse width resolution
• 4ns frequency and phase resolution
• Adjustable phase shift and dead band
• Cycle-by-cycle duty cycle matching
• Up to 2MHz switching frequency
• Configurable trailing-edge/leading-edge/triangular modulation
• RTC support for 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 start/stop
• Low IC standby power
• Primary-side voltage sensing current sharing (average & master/slave)
• Rich fault protection options
• 7 analog / 4 digital comparators, cycle-by-cycle current limiting
• Programmable blanking time and fault counting
• External fault input
• DPWM waveform synchronization across multiple UCD3138x devices
• 15-channel, 12-bit, 267ksps general-purpose ADC
• Internal temperature sensor
• Fully programmable high-performance 31.25MHz, 32-bit ARM7TDMI-S processor
• 64kB program flash (2 × 32kB banks)
• 2kB data flash with ECC
• 8kB data RAM
• 4kB boot ROM for firmware bootloading
• Communication peripherals: 2× I²C/PMBus, 2× UART, 1× SPI
• Timer capture with selectable input pins
• 80-pin QFP package
• Operating temperature range: -40°C to 125°C

• Power and telecom rectifiers
• Power factor correction
• Standalone DC-DC modules
• Phase-shifted full bridge with peak current mode control, LLC, HSFB, feed-forward, and more