STMicroelectronics STNRG288A

Overview

STNRG288A from STMicroelectronics is a digital controller IC for AC-DC and isolated DC-DC power conversion, integrating an STM8® microcontroller core, six SMED-based PWM generators (10 ns event detection, 1.3 ns resolution), four analog comparators (<50 ns propagation), and a 10-bit ADC with 12-bit equivalent resolution via programmable gain amplifier. It operates from -40 °C to 105 °C and targets digitally controlled SMPS in server PSUs and telecom rectifiers.

For engineers reviewing the STNRG288A datasheet, STNRG288A pinout, STNRG288A application, or STNRG288A equivalent, this page delivers verified technical context on SMED timing control, analog signal conditioning for voltage/current loop feedback, multi-mode PWM coupling, and integrated power management peripherals - all critical for high-efficiency, fast-transient digital power design.

Technical Context

The STNRG288A implements a deterministic, event-driven control architecture centered on six independent State Machine Event Driven (SMED) modules, each supporting single/coupled PWM operation with sub-nanosecond timing precision and up to three internal/external trigger sources. Its 96 MHz PLL enables precise clock synchronization across multiple SMEDs for interleaved or phase-shifted topologies.

It integrates four ultra-fast analog comparators (≤50 ns propagation) with configurable hysteresis and up to eight 10-bit ADC channels (1 MΩ input impedance, x1/x4 programmable gain), enabling real-time current sensing, overvoltage protection, and adaptive loop compensation without external signal conditioning.

Key Specifications

Pinout & Package

TSSOP38 package: 38-pin thin shrink small outline package with 0.65 mm pitch, optimized for high-density power board layouts and thermal dissipation in enclosed PSU enclosures.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital power controller applications.

Compared with UCC2897A and ICE2PCS01, the STNRG288A provides full digital control authority - including runtime parameter tuning, multi-topology support via SMED reconfiguration, and embedded diagnostics - making it suitable for next-generation power supplies requiring field-upgradable firmware and multi-rail coordination.

Availability

STNRG288A is available at Aetrix Electronics and suitable for server PSUs, telecom rectifiers, and industrial UPS systems requiring stable component supply, long-term lifecycle assurance, and production-ready qualification.

Supply support for STNRG288A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader specializing in power management, microcontrollers, and analog ICs, with manufacturing facilities certified to ISO 9001 and IATF 16949 standards.

The STNRGxxxA family is designed specifically for digitally controlled AC-DC and isolated DC-DC power conversion, emphasizing deterministic timing, analog signal integrity, and embedded firmware execution in harsh thermal and EMI environments.

FAQ

Does STNRG288A support synchronous rectification control?

Yes. The STNRG288A provides dedicated SR control signals via its SMED modules, including programmable delay compensation and adaptive turn-off based on secondary-side voltage zero-crossing detection. It supports both transformer-coupled and auxiliary-winding sensing methods, with hardware-level dead-time enforcement to prevent shoot-through.

What development tools are officially supported for STNRG288A firmware development?

STMicroelectronics provides the STNRG Designer GUI tool, STSW-STNRG001 firmware library, and the STEVAL-IPFC01V1 evaluation board. These tools support SMED configuration, ADC calibration, loop tuning, and real-time debug via SWIM interface - all validated against the STNRG288A silicon revision used in production.

Is the internal 96 MHz PLL usable as the system clock source for the STM8® core?

No. The 96 MHz PLL output is reserved exclusively for SMED timing and ADC sampling clocks. The STM8® core runs from a separate 16 MHz RC oscillator or the 96 MHz PLL divided down to 16 MHz via programmable prescaler - ensuring deterministic CPU timing independent of SMED activity.

Can STNRG288A operate without an external crystal?

Yes. It includes internal 16 MHz (trimmable ±1 %) and 153.6 kHz RC oscillators, enabling full functionality including SMED timing and ADC conversions. However, crystal-based HSE is required for applications demanding <±50 ppm frequency accuracy, such as synchronized multi-unit parallel operation.