Overview
The UCD9222RGZT from Texas Instruments is a highly advanced digital PWM system controller designed for non-isolated DC/DC power applications. This device is part of the UCD92xx family and is particularly suited for managing two independent power supplies. It integrates dedicated circuitry for DC/DC loop management, supporting up to two Voltage Identification (VID) interfaces. The UCD9222 features a robust set of functionalities, including a 3-pole/3-zero digital compensator, a fast ADC for error voltage measurement, and a digital PWM engine. It also supports multiple communication protocols such as PMBus, SMBus, and I2C, making it highly configurable and manageable through the Fusion Digital Power™ Designer tool.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Switching Frequency | Up to 2 MHz | |
| Duty-Cycle Resolution | 250 ps | |
| Closed Loop Resolution | Up to 1 mV | |
| VID Support | 4-bit, 6-bit, or 8-bit | |
| Operating Temperature Range | -40°C to 125°C | |
| Supply Voltage Range | -0.3 to 3.8 V | |
| Package Type | 48-pin QFN | |
| ADC Resolution | 12-bit | |
| Communication Interfaces | PMBus, SMBus, I2C |
Key Features
- Fully configurable two-output non-isolated DC/DC PWM controller
- Supports switching frequencies up to 2 MHz with 250 ps duty-cycle resolution
- Up to 1 mV closed loop resolution
- Hardware-accelerated 3-pole/3-zero compensator for improved transient performance
- Multiple soft-start and soft-stop configurations, including prebias start-up
- Voltage margining and sequencing support
- Sync In/Out pins to align DPWM clocks between multiple UCD92xx devices
- 12-bit digital monitoring of power supply parameters (input current, output current, input voltage, output voltage, temperature)
- Multiple levels of over-current fault protection and over/under-voltage fault protection
- Enhanced nonvolatile memory with error correction code (ECC)
- Device operates from a single supply with an internal regulator
Applications
- Networking equipment
- Telecommunications equipment
- FPGA, DSP, and memory power supplies
- Power management in high-performance computing systems
Q & A
- What is the maximum switching frequency supported by the UCD9222?
The UCD9222 supports switching frequencies up to 2 MHz.
- What types of VID interfaces does the UCD9222 support?
The UCD9222 supports 4-bit, 6-bit, or 8-bit VID interfaces.
- What is the operating temperature range of the UCD9222?
The operating temperature range is -40°C to 125°C.
- What communication protocols are supported by the UCD9222?
The UCD9222 supports PMBus, SMBus, and I2C communication protocols.
- How many power stages can the UCD9222 manage?
The UCD9222 can manage up to two independent power stages.
- What is the resolution of the ADC in the UCD9222?
The ADC resolution is 12-bit.
- Does the UCD9222 support voltage margining and sequencing?
Yes, the UCD9222 supports voltage margining and sequencing.
- How is the PMBus address selected for the UCD9222?
The PMBus address is selected using resistors attached to the ADDR0 and ADDR1 pins.
- What tool is provided for configuring the UCD9222?
The Fusion Digital Power™ Designer tool is provided for configuring the UCD9222.
- What types of fault protections are available in the UCD9222?
The UCD9222 includes multiple levels of over-current fault protection, over/under-voltage fault protection, and over-temperature fault protection.
