Skip to main content

Drive Circuit for a Heating or Inductive Coil

This solution drives an external element whether it be a coil for heating, a wire for generating a magnetic field, or inductor to propel a motor. A microcontroller (MCU) sends a pulse width modulated signal to the gate driver that efficiently connects power to the driving element or removes the charge from it. A comparator and amplifiers are used to monitor current flow and trigger any overcurrent events. 

System Benefits

  • Improved drive efficiency 
  • Improved load drive control 
  • Achieves high bandwidth current measurement 
  • Fast (1µs) overcurrent safety detection 

Target Applications

  • Heating elements 
  • Driving motors 
  • Discrete DC/DC converters 
  • Perimeter fencing 
Drive Circuit for a Heating or Inductive Coil

 

Renesas Dialog Diagram Legend
Configurable, Analog Mixed-signal IC      
SLG47004 Configurable Mixed-signal Matrix with In-System Programmability and Advanced Analog Features Datasheet Buy/Sample

 

LDO      
ISL80410 40V, Low Quiescent Current, 150mA Linear Regulator Datasheet Buy/Sample

 

Microcontroller      
RL78/G23 High-Performance, Cost Efficient 16-Bit MCU with Capacitive Touch Datasheet Buy/Sample

 

Power MOSFET      
RJK03M5DNS Nch Single Power MOSFET 30V 25A 6.3Mohm HWSON-8 Datasheet Buy/Sample