Overview
The UCD3138A, produced by Texas Instruments, is a highly integrated digital power supply controller designed to offer superior levels of integration and performance in a single-chip solution. This controller is particularly suited for a wide variety of power conversion applications, including AC-DC and isolated DC-DC conversions. The UCD3138A is fully programmable, allowing customers complete control over their application and the ability to differentiate their solution. It is supported by best-in-class development tools such as application firmware, Code Composer Studio™ software development environment, and TI’s power development GUI, which facilitates the configuration and monitoring of key system parameters.
Key Specifications
| Parameter | Description |
|---|---|
| Processor | Fully Programmable High-Performance 31.25 MHz, 32-Bit ARM7TDMI-S™ Processor |
| Memory | 32 KB of Program Flash, 2 KB of Data Flash with ECC, 4 KB of Data RAM, 4 KB of Boot ROM |
| ADC | 14-Channel, 12-Bit, 267-ksps General-Purpose ADC with Programmable Averaging Filters and Dual Sample and Hold |
| DPWM Outputs | Up to 8 DPWM Outputs with 250-ps Pulse Width Resolution |
| Communication Peripherals | PMBus, 1-2 UARTs (depending on package), Timer Capture with Selectable Input Pins |
| Package Options | 64-Pin QFN and 40-Pin QFN Packages |
| Operating Temperature | –40°C to +125°C |
| Watchdog and Reset | Built-In Watchdog: BOD and POR |
| Debug Interface | Code Composer Studio with JTAG Interface, Fusion Digital Power Designer GUI Support |
Key Features
- Digital Control of up to 3 Independent Feedback Loops with Dedicated PID-Based Hardware and 2-Pole/2-Zero Configurable Digital Compensator
- Nonlinear Control, Ideal Diode Emulation, and Synchronous Rectifier Soft On/Off
- Primary Side Voltage Sensing, Copper Trace Current Sensing, and Flux and Phase Current Balancing
- Current Share Bus Support with Average or Master and Slave Configurations
- Feature-Rich Fault Protection Options including 7 High-Speed Analog Comparators, Cycle-by-Cycle Current Limiting, and Programmable Fault Counting
- 10 Digital Comparators and Programmable Blanking Time
- Synchronization of DPWM Waveforms Between Multiple UCD3138A Devices
- Internal Temperature Sensor and Fast Input Voltage Feed Forward Hardware
- Soft Start/Stop with and without Prebias, Burst Mode, and Low IC Standby Power
Applications
- Power Supplies and Telecom Rectifiers
- Power Factor Correction
- Isolated DC-DC Modules
- AC-DC and Isolated DC-DC Applications in IT and Network Infrastructure
Q & A
- What is the UCD3138A?
The UCD3138A is a highly integrated digital power supply controller from Texas Instruments.
- What processor does the UCD3138A use?
The UCD3138A uses a fully programmable high-performance 31.25 MHz, 32-Bit ARM7TDMI-S™ Processor.
- What are the memory specifications of the UCD3138A?
The UCD3138A has 32 KB of Program Flash, 2 KB of Data Flash with ECC, 4 KB of Data RAM, and 4 KB of Boot ROM.
- What types of ADCs are available on the UCD3138A?
The UCD3138A features a 14-Channel, 12-Bit, 267-ksps General-Purpose ADC with Programmable Averaging Filters and Dual Sample and Hold.
- What communication peripherals are supported by the UCD3138A?
The UCD3138A supports PMBus, 1-2 UARTs (depending on the package), and Timer Capture with Selectable Input Pins.
- What are the package options for the UCD3138A?
The UCD3138A is available in 64-Pin QFN and 40-Pin QFN packages.
- What is the operating temperature range of the UCD3138A?
The operating temperature range is –40°C to +125°C.
- Does the UCD3138A have built-in watchdog and reset features?
Yes, the UCD3138A has built-in watchdog (BOD and POR) features.
- What debug interfaces are supported by the UCD3138A?
The UCD3138A supports Code Composer Studio with JTAG Interface and Fusion Digital Power Designer GUI Support.
- What are some common applications of the UCD3138A?
Common applications include power supplies, telecom rectifiers, power factor correction, and isolated DC-DC modules.
