Signal Consulting, LLC 

Model Si30HFHB-50V-30A-HPC 

50V-30A High Frequency H-Bridge with Integrated Heat Sink, DC to 20kHz PWM High-Pulse Control (-HPC), for Bidirectional DC Motor Control 





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Si30HFHB4-50V-30A-HPC Features:
Power Semiconductors: Eight 90A MOSFETs.

Overall Dimensions : 4.6”x2.43”x2.0”, (117 x 62 x 52 mm).

Load Isolation: The Load must be Isolated from the  Power Source.

Max. Continuous Current: 30A with Heat-Sink (as shown).

Max. Current for 5 sec: 50A with Heat-Sink ( as shown ).

Power-Conversion Efficiency: Approx. 98.5% (at 50V, 30A).

Control Type: High-Pulse Control, (0 to 5V PWM on Pin I1).

Worst-Case PWM Control Latency: 8 micro seconds.

Load Voltage Rise or Fall-Time (10% to 90%): 12 micro seconds.

Voltage Requirements: A single DC Source (unregulated or regulated ), any voltage from 12V to 50 V DC.

Load-Voltage Indicator: Bicolor LED.

Onboard 30A Fast Mini-Blade Auto Fuse: Replace, from  DigiKey, Part Number: F6079-ND

Components Type: 100% Solid State, NO Relays

On Board: 
Filter Capacitors
VTS diodes
Snubber Circuit included

   For Details, Download the  Si30HFHB-50V-30A-HPC-1Y2   Manual


The Si30HFHB-50V-30A-HPC is a 50V 30A, microprocessor based, high-frequency, H-Bridge with high-pulse (0 to +5V PWM) control input. This controller requires only one 0 to 20kHz active high PWM input on pin I1 and one static directional control input on pin I2 to control the speed and rotation direction of a DC motor (as shown on the truth table given below). This board uses a single (12V to 50V at 0 to 30A) DC power supply to control the speed of a DC motor (or load current) in forward or reverse direction. An onboard microprocessor samples the control inputs at 150kHz rate and generates the timing signals for the H-Bridge. The high sampling rate provides a worst-case PWM control latency of 8uS. The pin I1 input can be Pulse Width Modulated (PWM) from DC to 20kHz carrier rate. A bicolor LED is used to monitor the motor (or load) voltage (Red = Forward, Green = Reverse). A small (4.6”x2.4”x1.0”) integrated finned heat-sink is used to operate the bridge at 30A (continuous) current levels. Higher current-levels (40A) can be achieved with more efficient heat-sinks. Please click on this link and read the Board Mounting Instructions and Heat Sink Selection Guide. This board operates in a wide voltage-range (12V to 50V) at a maximum continuous load-current of 30A. Typical applications are: Bi-directional DC Motor-Speed Controller, Peltier Effect TE Coolers, Heat Pumps, DPDT Solid State Relay, etc. This board can be configured and programmed to perform efficiently in many customized applications.

  HPC Control Truth Table (on connector CN5)

         The I1 control line (VI1,G) can be Pulse-Width Modulated (PWM in a range of 0-20k Hz) to vary the average current supplied to a load or to a DC Motor.

          Typical Input Resistance of I1 and I2 is 33kOhm, relative to pin G

Frequency Response of the Si30HFHB-50V-30A-HPC

The I1 control line (VI1,G input voltage, 0 to +5V) can be Pulse-Width Modulated (PWM with a duty-cycle of 0% to 100%) over a wide range of carrier frequencies, as shown on the graph. This plot was obtained with the finned heat-sink (4.6” x 2.4” x 1.0”, as shipped with the unit). Improved performance can be achieved with more effective heat-sinks.  

A Typical Motor Control Application of the Si30HFHB-50V-30A-HPC

 In this open-loop application, the motor direction is selected by a 0 to +5V control signal (VI2,G, on pin I2, using an external normally-open switches S2, connected to the internal +5V source), while the motor speed (or average load current) is controlled by the duty-cycle of the PWM signal (VI2,G  on pin I1 on port  CN5, as shown below). The I1 input can be Pulse –Width Modulated (with 0 to +5V pulses sequence) over a wide Frequency range.

Warning:  The connecting wires to the Load and the Power Supply must be heavy gauge copper wire (#12 AWG or heavier) to handle the rated current level. In addition, these heavy gauge wires act as a heat sink, protecting the board from overheating. Note that each connecting point on CN1 is available at 2 places, thus two smaller wires can be used in place of a larger one. Each Pin on CN1 has a current rating of 32A (or 64A Jointly).

 Typical Applications: Driver for Bidirectional Variable-Speed  DC Motors, Peltier Effect TE Cells, Heat Pumps, PPDT Solid State Relays.

Si30HFHB-50V-30A-HPC, 50V 30A High Frequency H-Bridge with Finned Heat Sink and  High-Pulse Control for Bidirectional DC Motor Control. 
Price $279.00

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Availability: We usually ship in 2-3 business days.



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