High Current MOSFET Based Power Switch with Gate Driver

  • Rajkumar Sharma
  • 158 Views
  • moderate
  • Tested
  • SKU: EL119490
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This power load switch project provides a simple and inexpensive method for power control. It is intended for driving a resistive or inductive load. A TTL logic signal from the system turns the load switch ON and OFF. The project consists of a low ohm N-Channel Power Trench MOSFET FDB0300N1007L and Gate driver MAX5048 chip.  The load can be controlled by applying a PWM signal or Logic input.

The MAX5048A is a high-speed MOSFET driver capable of sinking/sourcing 7.6A/1.3A peak currents. These devices take logic input signals and drive a large external MOSFET. The MAX5048A has noninverting inputs that give the user greater flexibility in controlling the MOSFET. They feature two separate outputs working in a complementary mode, offering flexibility in controlling both turn-on and turn-off switching speeds.

Note: This project is designed to drive resistive loads such as heaters lamps or LEDs. For Inductive loads such as solenoids and motors use a clamp diode across the load.

Arduino Interface

Sample Arduino code is provided below to drive and test the board with a PWM signal. Connections are as follows.

MOSFET FDB0300N1007L – N-Channel Power Trench 100V, 200Amps

  • VGS 10V = 3 mΩ ID 26 Amps
  • VGS 6V = 4.5 mΩ ID 20 Amps

Operating Power Supply – 5V to 12V

  • Close Jumper J1
  • CN2: Pin 2 PWM or Logic In, Pin 3 GND
  • CN1: Load Supply 5V to 12V
  • CN3: Load
  • Capacitor C3 0.1uF/50V
  • Capacitor C4 10uf-100uF 16V SMD Size 1210
  • Capacitor C5 220uf/25V

Operating Power Supply – 12V to 60V 

  • Open Jumper J1
  • CN2: Pin 1 Apply 12V VCC, Pin 2 PWM or Logic In, Pin 3 GND
  • CN1: Load Supply 12V to 60V
  • CN3: Load
  • Do Not Install Capacitor C3
  • Capacitor C4 1uf/75V SMD Size 1210
  • Capacitor C5 Electrolytic 220uF-470uF/63V

Applications

  • Heater Control
  • High Current LED Dimmer or ON/OFF
  • Solenoid
  • DC Motors
  • Power Management (High Current Power ON/OFF)
  • Lamp Dimmer or Lamp ON/OFF Control
  • Battery Protection Under/Over Voltage
  • Under and Over Current Switch

Features

  • Supply 5V to 12 V Single Supply Operation (Load 10 Amps Continues Without Fan, 15 Amps with Fan
  • Supply 12V to 60V (Required Dual Supply for Load and Gate Driver) Load Up to 20Amps
  • Input PWM or Logic 3.3V to 12V
  • PWM Frequency Input up to 50Khz (Tested)
  • PCB Dimensions 48.42 x 25.24 mm

Schematic

Parts List

NOQNTY.REF.DESCMANUFACTURERSUPPLIERPART NO
12CN1,CN32 PIN SCREW TERMINAL PITCH 5.08MMPHOENIXDIGIKEY277-1247-ND
21CN23 PIN MALE HEADER 2.54MMWURTHDIGIKEY732-5316-ND
32C110uF/25V SMD SIZE 1206MURATA/YAGEODIGIKEY
42C2,C30.1uF/50V SMD SIZE 0805MURATA/YAGEODIGIKEY
51C5220uF/63VRUBYCONDIGIKEY1189-3786-ND
62D1,D2LED SMD SIZE 0805LITE ON INCDIGIKEY160-1427-1-ND
71J1JUMPER/SHUNT 2 PIN MALE HEADER PITCH 2.54MMWURTHDIGIKEY732-5315-ND
81Q1FDB0300N1007LON SEMIDIGIKEYFDB0300N1007LCT-ND
92R1,R31K 5% SMD SIZE 0805MURATA/YAGEODIGIKEY
101R20E SMD SIZE 0805MURATA/YAGEODIGIKEY
111U1MAX5048CAUTMAXIMDIGIKEYMAX5048CAUT+TCT-ND
121C410uF/50V SMD SIZE 1210MURATA/YAGEODIGIKEY
131J1SHUNT FOR JUMPER J1SULINS INCDIGIKEYS9001-ND

Connections



Gerber View

Photos

Video


MAX5048 Datasheet

MAX5048A-MAX5048B

PCB

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