PWM power controller - a set designed to regulate the average power in the load using pulse width modulation. Can be used to control the rotation speed of DC collector motors, the power of heating elements, incandescent lamps and LED strips 12-24V.
Specifications:
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Supply voltage: 12 - 50 V
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Current consumption: <10mA
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Maximum load current: 30A
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PWM Duty Cycle: 5-95%
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PWM frequency: ~20kHz
Schematic diagram
Element layout
General Description:
The regulator consists of a variable master oscillator on the NE555 chip and a switching transistor Q1. A driver is assembled on transistors Q2 and Q3, minimizing switching losses. The duty cycle of the pulses is changed by the variable resistor RV1 within 0.05-0.95.
Power is supplied to U2 from the stabilizer U1, which limits the permissible range of supply voltages - 12 ... 30V. If you need to work with a supply voltage of 30 to 50V, you should install a zener diode (suppressor) D4. For voltages from 12 to 30V, a jumper should be installed instead of D4.
Notes:
1. When using, it should be borne in mind that the device regulates the average current in the load, and the pulse current remains unchanged and maximum.
2. When working at a load close to the maximum, install the transistor on the radiator, ensure reliable cooling of the circuit and board elements.
3. Set the variable resistor last.
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K-124_2
The data presented in the product description are for reference only and may differ from those indicated by the manufacturer.
