Embedded Firmware Development Engineer

Larsen & Toubro; Bengaluru; On-site; INR 900,000 - 1,350,000; Full time

Job summary

Larsen & Toubro Bengaluru, India, is seeking an Embedded Firmware Engineer to develop and validate software for AC-DC rectifiers, DC-DC converters, and power conversion systems.

You will work on control algorithms, real-time firmware, protection logic, and hardware bring-up, collaborating with hardware and software teams to ensure robust performance.

Experience in C/C++, TI/C2000, ARM Cortex-M, and tools like Code Composer Studio is preferred; 2–8 years in power electronics is advantageous.

Qualifications

• Bachelor's degree in Electronics or Electrical engineering is required.

Responsibilities

• Embedded Firmware Development for AC-DC and DC-DC converters.
• Develop low-level firmware for digital controllers (TI C2000, ARM Cortex-M).
• Implement control loops and digital compensators; tune PFC and LLC/DC-DC controls.
• Design, implement, and validate protection and safety logic (OVP/UVP, OCP, temperature).
• Hardware bring-up and collaboration with hardware engineers for gate drivers and sensing circuits.
• Work with CAN/CANopen/Modbus/RS485/Ethernet/UART/SPI/I2C interfaces; software–hardware integration.

Skills

Power electronics

Firmware development

C/C++

TI DCL

CMSIS DSP

PWM/ADC timing

Education

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

Tools

Code Composer Studio (TI)

Keil

IAR

STM32Cube

MATLAB/Simulink

Job description

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.