ECRI Microelectronics

HSA400 Series Pulse Width Modulation Amplifiers

1.Features(for outside view, see Fig. 1)

It can be used interchangeably with SA50 of APEX company.

Wide power supply range with max. 80V achievable
5A continuous output current
Four-quadrant operation
PWM generator is contained inside it


2. Scope of application of HSA400 Series Pulse Width Modulation Amplifiers

Excitation coil:
Active magnetic bearing;
Brushed motor control;
Amplifier of type D switching mode.


3. Description of HSA400 Series Pulse Width Modulation Amplifiers

HSA400 is a kind of pulse width modulation amplifier, which can provide 5A continuous current. It is a kind of full-bridge amplifier that can work under the condition of wide supply voltage range. Both the drive and control circuit for the bridge arm switch are integrated inside it, PWM current is also integrated inside it, when the user uses it as the drive circuit of motor, he only needs to provide an analog signal; when he uses it as an audio amplifier, he just needs to provide audio signal.
This product is made by the thick-film hybrid integration process and is totally sealed in a metal package to TO-3 standard. Design and manufacturing of products shall meet the requirements of GJB2438A-2002 “General specification of hybrid integrated circuit” and detailed specifications for products.

4. Electrical performance (Table 1, Table2) of HSA400 Series Pulse Width Modulation Amplifiers

PWM amplifier (HSA400)PWM amplifier (HSA400)

9. Outside view and dimensions of package (unit: mm)(Fig. 7, Table 4) of HSA400 Series Pulse Width Modulation Amplifiers

PWM amplifier (HSA400)


Application notes

  • I is recommended to add a 100µF/100V Tantalum capacitance and a 0.1µF/100V ceramic capacitance at Vs power supply terminal.
  • It is recommended to add a 22µF/50V Tantalum capacitance and a 0.1µF/50V ceramic capacitance at Vcc terminal.
  • It is recommended to add a 0.1µF/50V ceramic capacitance at Input terminal.
  • Ensure good heat sinking condition during the service of the product, it is recommended to add heat sinking plate.


Model Series Function Max.Input Vol Max Current
HSA400 Series Pulse Width Modulation Amplifiers BRUSHED DC MOTOR CONTROLLER 80V 5A
HSA06 Series Pulse Width Modulation Amplifiers BRUSHED DC MOTOR CONTROLLER 100V 30A
HSA03 Series Pulse Width Modulation Amplifiers BRUSHED DC MOTOR CONTROLLER 100V 30A
HSA04 Series Military Pulse Width Modulation Amplifiers BRUSHED DC MOTOR CONTROLLER 200V 20A
HMSK4203 High Efficiency Pulse Width Modulation Amplifiers BRUSHED DC MOTOR CONTROLLER 75V 10A
HSA12 Large Current Pulse Width Modulation Amplifiers BRUSHED DC MOTOR CONTROLLER 200V 20A