# UCD3138A Highly Integrated Digital Controller for Isolated Power

## Device Overview
️· Features: Digital control of up to 3 independent feedback loops, high efficiency with burst mode, dedicated PID-based hardware, synchronous rectifier support, low standby power, primary side sensing, copper trace current sensing, flux/phase balancing, current share bus support, up to 16 MHz EADC, feature-rich fault protection, programmable DAC, and more.
️· Applications: Power supplies, telecom rectifiers, isolated DC-DC modules, power factor correction.
️· Description: A fully programmable digital power supply controller offering high integration, performance, and flexibility. Uses digital control loops, a 32-bit ARM7TDMI-S microcontroller, and various peripherals for advanced power management.

## Key Features & Specifications
️· Control: PID-based digital control, adjustable modulation methods (frequency, phase, pulse width).
️· Communication: I2C/PMBus, 2 UARTs.
️· Analog Inputs: Up to 14 channels with 12-bit ADC.
️· Digital Outputs: 8 high-resolution DPWM outputs.
️· Protection: Cycle-by-cycle current limiting, programmable fault inputs, external fault capability.
️· Temperature Range: -40°C to 125°C.
️· Package Options: 64-pin VQFN, 40-pin WQFN.

## Functional Blocks
️· ARM7TDMI-S Microcontroller: Executes program code, manages peripherals, and handles communication.
️· Digital Power Peripherals (DPPs): Implement high-speed digital control loops.
️· EADC: Dedicated error analog-to-digital converter.

️· DPWM: Digital Pulse Width Modulation outputs.
️· Synchronous Rectifier Control: Optimizes synchronous rectifier performance.
️· Communication Interfaces: I2C/PMBus, UART.
️· Timers and Interrupts: Provide timing and interrupt handling.

## Additional Information
️· Full datasheet available from TI: [www.ti.com](http://www.ti.com)
️· The UCD3138A is a functional variant of the UCD3138 Digital Power Controller.
️· TI offers development tools, including application firmware and a power development GUI.