Signal Consulting, LLC  Model Si20HPB4-50V-20A

50V-20A High Power H-Bridge Board for Bi-directional DC Motor Control with Integrated Heat Sink

Si20HPB4-50V-20A Features: Power Semiconductors: Four 90A MOSFETS Rated Continuous Current: 20A With the 3.3" x 4" x0.064" Heat-sink (as  shown ). Max Current for 2 sec: 60A with Proper Heat-sinks Installed Board's Size: 2.0" x 2.5" (5.08cm x 6.35cm). Components Type: 100% Solid State, NO Relays On Board:  Filter Capacitors VTS diodes Snubber Circuit Ready Voltage Requirements: Single DC Source (unregulated and unfiltered)   Any voltage from 9V to 50 Volts for the Motor P+   Si20HPB4-50V-20A, 20ASpec Sheet  (PDF)

The Si20HPB4-50V-20A is an efficient high-power H bridge that works over a wide range of source voltages  (9V to 50V) at high load currents (20A max). This board includes an Aluminum heat-sink (3.3”x 4.0”x0.065") to achieve this impressive performance. Higher current values can be attained with more efficient heat sinks. Snubbing circuits and filter capacitors are included to suppress load-current switching transients. The motor action (as shown below)  is controlled by the voltages applied to pin H and pin C (relative to pin G) on the connector PWM Cont. In.

Control Input Truth Table  ( Pins on connector PWM Cont. In )

The V_H,G and V_C,G control lines can be Pulse-Width Modulated (PWM in a range of 0-20k HZ) to vary the average current supplied to the DC Motor or load.

  * When V_H,G and V_C,G are +5V at the same time, the motor will spin forward or reverse direction depending which signal arrives to +5V first. But no damage will occur to the motor (load) or to the power electronics.

  .About the Voltage Requirement:  The Si20HPB4 will work with any DC motor in the 9 V to 50 V range. In addition, the power filters are included on this board. Consequently, only unfiltered (full-wave rectified) DC input power is required. Furthermore, the control circuit is optically isolated from the power circuit; rejecting unwanted power glitches. 

A Typical Motor Control Application of the Si20HPB4-50V-20A

PWM Carrier-Frequency: The Si20HPB4 can be used with Pulse-Width Modulated (PWM) control-inputs over a vide range of carrier frequencies at high load currents, as shown on the graph. This plot was obtained with the  3.3” x 4.0” x 0.065” aluminum  heat-sink ( as shipped with the unit). Improved performance can be achieved with more effective heat-sinks.

Typical Domestic Shipping Cost: $12.00.
Typical International Shipping Cost: $24.00.

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

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