EM-213 is a high-efficiency 1-quadrant PWM power controller for resistive and inductive DC loads. It provides up to 10 A of continuous output current and 15 A peak current for short periods.
The selectable PWM frequency allows the controller to be optimized for different load types. The 19 kHz mode is intended for inductive loads such as DC motors, while the 300 Hz mode is suitable for resistive loads such as lamps and heaters.
The EM-213 controls power in one direction using the PWM principle. It is suitable for applications where the load requires adjustable power without electronic direction reversal or regenerative braking.
Because the power stage operates as a switch, power losses remain low and efficiency is high.
Two PWM frequencies are available for different load characteristics:
The high-frequency mode operates above the normal audible frequency range, helping to reduce audible PWM noise in motor applications.
The output is compensated for changes in the supply voltage. This helps maintain a stable output level even when the input voltage varies and allows the controller to operate successfully with an unregulated power supply.
Output power is controlled using an analog voltage signal. The standard control range is 0–5 V, and the input range can be adjusted for higher control voltages.
The integrated soft-start function increases the output gradually when control is activated. The ramp time can be adjusted from 0 to 4 seconds, reducing mechanical stress and motor starting current.
The output stage is protected against overload-related overheating. The protection activates at approximately 110°C and automatically restores operation after the controller has cooled sufficiently.
| Supply voltage | 10–35 VDC |
| Continuous motor current | Max. 10 A, depending on ambient temperature (Ta) |
| Peak motor current | Max. 15 A for 10 s |
| Voltage drop | 0.4 V at 10 A |
| PWM frequency | 300 Hz or 19 kHz |
| Soft-start time | Adjustable 0–4 s |
| Control range | 0–5 V or higher, adjustable |
| Control input impedance | 100 kΩ |
| Connector capacity | 1.5 mm² |
| Overtemperature protection | 110°C |
| Operating temperature | −20…+70°C (Ta) |
| Weight | 70 g |
| EMC compliance | EN 50081-2 / EN 50082-2 (industrial environment) |
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