Embedded Firmware Development Engineer

Job Description: Embedded Firmware Engineer – AC-DC / DC-DC Power Converters (P21)

Role Summary

The Firmware or Embedded Software is responsible for developing, implementing, and validating embedded control software for AC-DC rectifiers, DC-DC converters, on-board/off-board chargers, SMPS, and power conversion systems.

The role focuses on control algorithms, digital control loop development, real-time firmware, protection logic, communication protocols, and hardware bring-up. End to end responsibility of firmware development and functionality.

Key Responsibilities

Embedded Firmware Development

Develop low-level firmware for digital controllers

TI C2000 (F2803x, F2837x, F28004x, F28x series), ARM Cortex-M microcontrollers, DSP/FPGA

Implement control loops for AC-DC and DC-DC conversion such as Current loop, voltage loop, PFC control (totem Poly, CCM, interleaved), LLC/DC-DC stage control, Soft-start, mode transition, burst modes

Develop firmware for PWM generation, ADC sampling, interrupts, timers.

Converter Control Algorithms
Design, tune, and validate algorithms for AC-DC PFC control (average, peak, digital), DC-DC resonant/LLC control,– Phase-shifted full bridge, Buck/Boost control, multi-phase interleaving
Implement digital compensators (PI, PID, feed-forward, PR, PLL).
Protection & Safety Logic
Develop firmware for protections OVP/UVP, OCP, SCP, Over-temperature, Soft-switching protection, Input/output surge and transient protections
Implement fast fault detection and safe shutdown algorithms.
Hardware Bring-up & Validation
Work with hardware engineers to validate Gate drivers, Power stage behaviour, ADC sensing circuits, Board bring-up and debugging
Perform real-time testing using oscilloscope, power analyser, logic analyser.
Digital Communication & Interfaces
Should implement the following protocol CAN / CAN open /1939/Modbus/RS485/Ethernet/UART/SPI/ I2C
Should Integrate firmware with cloud/BMS/controllers if required.
System Integration & Optimization

Ensure firmware meets requirements for Efficiency, Dynamic response, EMI/EMC, compliance, Start-up/shutdown sequencing, Optimize real-time control code for performance and safety.

Documentation

Prepare firmware architecture, Requirements & design specifications, Test cases & validation reports, Version control

Technical Skills

Strong understanding of power electronics control
Experience in AC-DC and DC-DC converter control firmware.
Hands-on with real-time embedded programming (C, C++).
Experience with digital control libraries (TI DCL, CMSIS DSP).
Understanding of PWM modules, ADC sampling, control timing.
Good debugging skills on real hardware.

Tools

Code Composer Studio (TI), Keil, IAR, STM32Cube.
MATLAB/Simulink (algorithm simulation).
Git, JIRA, SVN.

Qualifications

B.E / B.Tech / M.Tech in Electronics, Electrical, Embedded Systems, Power Electronics.

Experience 2-8 Years

Preferred Experience

Worked on 30+ kW-level converters for EV chargers, ESS, solar inverters, onboard chargers.

Knowledge of automotive ISO 26262, IEC 61800, IEC 61000 standards (preferred).

Exposure to SiC/GaN based systems. Experience with FPGA or RTOS is a plus.
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