Ranjith Kumar Mani
Chennai
Summary
Offering 13+ years of extensive expert level design and leadership experience in Hardware design. Innovative Design Lead with background in managing creative projects from concept to completion. Experience includes leading design teams, overseeing product development, and implementing strategic design solutions that elevate brand visibility. Strengths comprise of strong leadership skills, ability to drive creativity among team members, and adeptness at working under tight deadlines while maintaining quality standards. Impacted previous organizations by streamlining processes, engendering collaboration, and fostering environment for innovation.
Overview
7
7
years of professional experience
1
1
Certification
Work History
Design lead hardware
TCS, Client: Brakes India.
Chennai
12.2024 - Current
- Served as design lead for hardware, overseeing all related modules and project execution.
- Acted as subject matter expert for design, ensuring compliance with specifications.
- Owned PCB design and review processes to maintain high quality standards.
- Conducted DFMEA analysis to identify potential failure modes and enhance reliability.
- Led board bring-up activities, focusing on performance optimization and issue resolution.
- Managed EMI/EMC design and testing to meet regulatory requirements.
- Executed pre-compliance testing to validate product readiness before market release.
- Collaborated with vendors on bed of nails discussions to refine manufacturing processes.
- DFM, DFT, FCT, EOL has been done.
- Executed in vehicle testing and identified some of the key issues in algorithm.
- Had been a SME for the ISO coil, Dump coil and motor activation.
- Served as a SME for the microcontroller, wheel speed sensors, and ASIC for the total ABS, EBD functions.
- Good knowledge with the automotive standards such as ISO and AIS004 testing standards.
- Good expertise in implementing CAN communication.
- Going to testing facilities such as GARG, ARAI and HCL for all the product level testings
Team manager
Hubbell India
Chennai
09.2018 - 11.2024
- Worked on product families of energy meters and lighting control devices with RF technology at frequencies of 450 to 490 MHz and 900 MHz, and power line communication.Network interface board: The NIC board basically acts as a communication device for the I210+C, I210+, and KV2C family meters, and the end point. Transmitting all the meter data to the end point device, the end point then transfers data to the base station. It uses RF communication of 450 to 470Mhz. Also working on the next gen design with 900Mhz for the transmission frequency.Responsibilities:1. New microcontroller selection and implementation.2. New power design which involves, buck converter design, multiple level LDO converters, power switching section and last gasp super cap circuit design.3. Complete product redesign from concept to final design stage.4. PCB design:Designed and reviewed the RF board that is able to transmit 450Mhz and 900Mhz. it is a 6 Layer PCB with impedance matched trace. layer stack up decision, Test point decision, DFM design, Room creation, placement decision. The RF trace has to be 50 ohms impedance matched. Calculation regarding trace routing and trace thickness decision. Power supply trace thickness calculation and other high speed signal identification and routing with ground copper around it. Designed PCB's with the basic EMI/EMC considerations. RF shield have been implemented to control the emissions over the air.5. RF design and testing:Involved in the RF section design such as tapping resistors, directional coupler and T attenuators. Was involved in the RF power measurement and analysis with the RF engineer and done many testing related to RF product inside the chamber.Analysis such as DFMEA, power tree analysis, clock analysis, new MCU pin compatibility analysLed design projects from concept to completion, ensuring alignment with client goals.ghting control devices with RF technology at frequencies of 450 to 490 MHz and 900 MHz, and power line communication.
- Network interface board: The NIC board basically acts as a communication device for the I210+C, I210+, and KV2C family meters, and the end point. Transmitting all the meter data to the end point device, the end point then transfers data to the base station. It uses RF communication of 450 to 470Mhz. Also working on the next gen design with 900Mhz for the transmission frequency.
- Responsibilitie: New microcontroller selection and implement New power design which involves, buck converter design, multiple level LDO converters, power switching section and last gasp super cap circuit design.
- Complete product redesign from concept to final design stage.
- PCB design: Designed and reviewed the RF board that is able to transmit 450Mhz and 900Mhz. it is a 6 Layer PCB with impedance matched trace. layer stack up decision, Test point decision, DFM design, Room creation, placement decision. The RF trace has to be 50 ohms impedance matched. Calculation regarding trace routing and trace thickness decision. Power supply trace thickness calculation and other high speed signal identification and routing with ground copper around it. Designed PCB's with the basic EMI/EMC considerations. RF shield have been implemented to control the emissions over the air.
- RF design and testing: Involved in the RF section design such as tapping resistors, directional coupler and T attenuators. Was involved in the RF power measurement and analysis with the RF engineer and done many testing related to RF product inside the chamber.
- Analysis such as DFMEA, power tree analysis, clock analysis, new MCU pin compatibility analysis.
Lead engineer
HCL technologies PVT LTD
Chennai
- Medical Project: Spectrum IQ Infusion Pump (V9 - Medical delivery) The Infusion pump is an electronic infusion device used for administration of intravenous medications and solutions. This pump includes Motor mechanism, back up battery with Wi-Fi module, Battery charging, audio annunciator, UART communication, various sensor circuits.
- Responsibilities: Simulation of ideology in LTSpice, circuit analysis, design calculations, schematic creation, Layout review, SOP's creation, Hardware requirement specification creation for all subsystems, HDD and LDD document creation, stress analysis, derating analysis, DFMEA/FMEA analysis, test case creation in ALM, test case execution in ALM, performing dry run and formal execution, Both white box and black box testing, document routing in TCU following the whole change order process, 510K submission document preparations, IEC60601-1 and other standard knowledge, Spice simulation for the subsystem functionality verification, fixture designs for all the test case verification, supporting NPD, cross functional team handling, onsite team meetings.
- Subject Matter Expert in power designs inside the pump, which includes the power entry, power change over, ESD protection, battery, battery monitoring/charging circuits, alarm speaker circuits.
- Supported for Automation Fixture set up for the infusion pump testing.
Engineer
Advanced environmental technologies
Chennai
- Consumer project: MPTS (Maximum Power Transfer Solutions): MPTS is power factor corrector equipment that stables Power Factor on line side for any load that is connected to the equipment with the help RLC network thereby also reducing the current consumption on the line side. The system analyses the voltage and current waveforms then decides which capacitor bank to switch on there by reducing the power factor on the line side.
- MPTS helps heavy electrical manufacturers to maintain a stable power factor thereby reducing the penalties to electricity board. The power capacitors switching are done with the help of thyristor based switching modules.
- Responsibilities: Involved in the design of Main controller card of the MPTS panel. Involved in the design and testing of the thyristor based switching module. Involved in the mechanical design and assembly of the unit. Involved in designs of heat sink for the heat dissipation of the thyristor modules. Was in charge of the production and testing of the unit at AVALON technologies.
- Inverter: This is a basic 12V DC to 120VAC converter designed as a proof of concept using the in-house DC relay. Responsibilities: Was involved in the complete design of circuits board module assembly and mechanical assembly as well. Was involved in the selection of the MCU for the design. Has written some basic codes using the AVR studio to do the relay switching and having all the feedback and analyze it. Completed the product to give a pure sine wave at the output by improving the sampling method.
Education
Bachelor of Engineering - Electronic And Communication
Veltech Multitech Engineering College
Chennai12th Grade - Biology
Sri Venkateshwara Matric Higher Secondary School
ChennaiSkills
▪ Experience in Analog design such as
opamps, MOSFET, transistor, ADC, DAC,
EMI/EMC design, power management,
Feedback systems, Filter design, circuit
trouble shooting, DC motor drive
▪ EMI/EMC design and implementation, Testing the same in external agencies
▪ Complete experience in the automotive domain such as pre compliance, full DV, product validation testing
▪ Complete knowledge in medical domain product development from requirement drafting to complete product delivery until FDA product certification
▪ Complete understanding of ISO, AIS, IEC standards
▪ Experience in digital design such as
logic gate, memory interfaces, buffers,
RS232 to 33V level conversion, Sensor
management New MCU design which
includes – Multiple manufacturers
analysis, Peripherals selection/analysis,
pin assignments, clock analysis, power
consumption per peripheral analysis
▪ Experience in power supply designs
such as LDO, buck, boost and isolated
converter Well experienced in battery
charging design Low and high power
converter AC to DC and DC to AC
converters Power measurement in both
DC and AC
▪ Experience in Communication
interfaces such as CAN, SPI, I2C, UART, DALI
and RS232 USB 20 Hub design
▪ Experience in RF designs such as 450 to
470MHZ with on board and floating
antennae SAW filter selection, forward
and reverse voltage measurement,
Radio and amplifier IC selection
▪ AC power switching designs such as
SCR, TRIAC and DIAC design, Solid state
relays Power factor correction
equipment design Power line
communication design
▪ RF design expertise in calculation of
coupling factor, dBm to watts
conversion, attenuator design, resistive
Upper intermediate
tap design, S parameter calculation, RF
power calculation
▪ Documentational expertise in Worst
case analysis, DFMEA Analysis, Thermal
analysis, complete product
documentation
▪ Testing capabilities include test case
creation, dry runs, black box/white box
testing, module level testing, regression
testing, Environmental testing, Jig
design and testing Excellent hardware
issue trouble shooter
▪ Good experience in schematic design
Good experience in PCB design and
review Designed up to 6 layers of PCB
Was responsible for DFM/DFT for PCB’s
Checklist based review process was
conducted Expert in using Altium
designer 21
▪ Experience in hardware testing using
Low frequency Oscilloscope (500MHz
supported), High Frequency
Oscilloscope (20 GHz supported), Multi-
meter and current probes, power
supplies, load banks, spectrum
analyser, LISN, E field and H field
probes
▪ Knowledge in standards such as IEC
60601series and ISO
▪ Experience in simulation tools such as LT
spice, TINA, WEBENCH and PI expert
Affiliations
Anna university
Accomplishments
- Have done many USA visits and completed many projects on customer sites.
- Has completed the pre compliance, Full DV, Full PV on customer timelines and delivered the product on time for customer trials.
Management Activities
- Handled a team size of max 10 members.
- Handled billing details for the resources from our team.
- Task allocation and task completion data handling for the team members.
- Project planning and timeline deciding activities.
- Full DV, PV pre compliance testing plan coordination with the testing agencies.
Certification
- Completed Gen AI, agentic AI with proper certifications.
Timeline
Design lead hardware
TCS, Client: Brakes India.
12.2024 - Current
Team manager
Hubbell India
09.2018 - 11.2024
Lead engineer
HCL technologies PVT LTD
Engineer
Advanced environmental technologies
Bachelor of Engineering - Electronic And Communication
Veltech Multitech Engineering College
12th Grade - Biology
Sri Venkateshwara Matric Higher Secondary School