ECRI Microelectronics

HSA04 Series Military Pulse Width Modulation Amplifiers

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

It can be used interchangeably with SA04 of APEX company.

20A current continuous output
Thermal protection and programmable external current-limiting protection
Analog and digital input
Synchronous or external oscillator
Flexible frequency control

2. Scope of application of HSA04 Series Military PWM Amplifiers

Motor control;
Drive reactive load;
Drive low-frequency sonar;
Drive piezoelectric converter;
Offline drive;
C-D welding control.

3. Description of HSA04 Series Military PWMA

HSA04 is a kind of PWH type power amplifier, which can provide 4kW transmitted power for the load. There is a 45kHz oscillator inside, the clock input stage halves the oscillator frequency so as to provide the basic 22.5kHz switching frequency. External oscillator can be used to reduce switching frequency or used as synchronous signal of multiple power amplifiers. Shutting off the input end can turn off the four drive tubes of H bridge circuit; has the functions of current limiting and overheat protection.
The series of product adopts thick film hybrid integrated process, packaged with sealed metal case. 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 HSA04 Series Military Pulse Width Modulation Amplifiers

PWM amplifier (HSA04)

5. Operating principle (Fig. 2) of HSA04 Series Military Pulse Width Modulation Amplifiers

PWM amplifier (HSA04)

PWM amplifier (HSA04)

8. Connection diagram for typical application of HSA04 Series Military Pulse Width Modulation Amplifiers

HSA04 has two current sampling terminals I and I, when adopting voltage mode control, these two terminals should be short-circuited, the typical connection diagram is shown as in Fig. 5; while adopting current control, they should be connected to sampling resistance and the sampling resistance should choose non-inductive resistance, the typical connection diagram is shown as in Fig. 2.




PWM amplifier (HSA04)

(1) Bypass of power supply

HSA04 power supply shall have adequate bypass to ensure it runs properly, otherwise, it may be unstable and its efficiency may be reduced and output may oscillate. Vs power supply shall be added with at least 1µF ceramic capacitance, then connected with a bypass capacitance of a low ESR value in parallel, its magnitude shall select 10µF/A at least; for Vcc power supply, it shall also be connected with a 0.1~0.47µF ceramic capacitance in parallel and a 6.8~10µF bypass capacitance of a low ESR value.

(2) Overcurrent protection technology

typical connected diagram under voltage mode is shown as fig 6.


PWM amplifier (HSA04)
Current-limiting control circuit is designed in order to guarantee amplifier working in safe operation area S0A. Current-limiting value shall not exceed the maximum rated current of the amplifier, otherwise, the amplifier will be damaged.
Because the output current will flow through the current-limiting resistance, its rated power shall be considered, from the point of view of reliability, the resistance value shall be selected as big as possible, and the calculation formulas of current-limiting resistance and its power consumption are as follows:


is the set current-limiting value, at the beginning, set R-Filter and C-Filter to 5kΩ and 0.01µF, respectively.

9. Outside view and dimensions of package (unit: mm)(Fig. 7, Table 4) of HSA04 Series Military Pulse Width Modulation Amplifiers


PWM amplifier (HSA04)

Table 4 Case materials

Case model

Header

Header plating

Cover

Covering plating

Pinmaterial

Pin plating

Sealing style

Notes

UPP4138 -12a

Cold rolled steel (10#)

Ni

Iron/ nickel alloy (4J42)

Ni

Coppercompound

Ni

Compression seal


Note: temperature of the solder pins within 10s shall not exceed 300℃.


PWM amplifier (HSA04)

Application notes

  • Switch on power supply correctly, during the power-up, accurately connect the positive and negative poles of power to avoid burnout.
  • When carrying out the electrical performance test, the test position shall be the pinouts of the product.
  • During the assembly, shockproof measures shall be added in order to avoid pin damage, if necessary.
  • Do not bend the pinouts to prevent the insulator from breaking, which affect the sealing property.
  • The circuit shall be added with heat sinking device, and the size of radiator depends upon the dissipation power.
  • When the user places an order for the product, detailed electric performance indexes shall refer to the relevant enterprise standard.






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