The UCD3020A device is a digital PWM controllers from Texas Instruments providing a
single-chip control solution for digital power-conversion applications. This device allows digital
control implementation of a high-performance, high-frequency power supply with flexible
configuration of parameters, supervisory, monitoring, and communication functions.
The UCD3020A is a fully programmable solution that is configurable to support a wide
range of isolated and non-isolated topologies in single- or multiphase configurations. Some
examples include interleaved PFC, isolated forward, half-bridge, phase-shifted full bridge, active
clamp, and resonant LLC.
At the core of the UCD3020A controller is the digital control-loop peripherals, also
known as Fusion Digital Power
peripherals (FDPP). Each FDPP implements a high-speed digital control loop consisting of a
dedicated error analog-to-digital converter (EADC), a three-pole and three-zero (3p,3z) digital
compensator, and two DPWM outputs with 250-ps pulse-width resolution. The device also contains a
12-bit, 200-ksps general-purpose ADC with up to 9 channels, timers, interrupt controls, and
communications ports such as PMBus, SCI, and SPI. The device is based on a 32-bit ARM7 RISC CPU
that performs real-time monitoring, configures peripherals, and manages communications. The CPU
executes its program out of programmable flash memory as well as ROM.
The UCD3020A is supported by Texas Instruments' Code Composer
Studio software development environment.
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