Drive A Resistive Heater Element Without Adding Noise To The System
by James Henden, principal engineer, New Wave Research, Fremont, Calif., Electronic Design, Sep 01 2007
Focus:
A low-frequency PWM voltage source drives a resistive heater at power levels up to approximately 25 W without adding much noise to the system. Heat output varies directly with PWM duty cycle. This three-transistor circuit features pulse-by-pulse current limiting. (PWM signal is generated separately.)
What you’ll learn:
- How to build a low-noise drive circuit for a resistive heater
Notes:
ED's Ideas For Design
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