Signal Consulting, LLC  Model Si30HFHB-50V-30A-ALC

50V-30A High-Frequency H-Bridge, DC to 20kHZ PWM, with Active-Low Control, Integrated Finned Heat-Sink, for Bidirectional DC Motor Driver

Si30HFHB-50V-30A-ALC Features: Power Semiconductors: Eight 90A MOSFETs Max. Continuous Current: 30A with Heat-Sink (as shown). Max. Current for 5 sec: 50A with Heat-Sink ( as shown ). Load Isolation: The Load must be Isolated from the  Power Source. Control Type: Active Low.                                       Load-Voltage Indicator: Bicolor LED. Worst-Case Control Latency: 7 micro seconds. Power-Conversion Efficiency: Approx. 98.5% (at 50V, 30A). Dimensions : 4.6”x2.43”x2.35”, (117 x 62 x 60 mm). Components Type: 100% Solid State, NO Relays On Board:  Filter Capacitors VTS diodes Snubber Circuit included Voltage Requirements: A single DC Source (unregulated), any voltage from 9V to 50 Volts   Si30HFHB-50V-30A-ALC  Spec Sheet  (PDF)

The Si30HFHB-50V-30A-ALC is a 50V 30A, microprocessor based, high-power, High-Frequency H-Bridge with active-low control inputs. This board uses a single (9V 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 control latency of 7uS when the bridge is changing current direction or switching on or off. Two active low digital (0 to +5V) control signals (V_F,N  and V_R,N) or switches are used to select the direction of rotation (or Load-Current Direction). These inputs 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 (9V 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. 

           Motor Control-Action Truth-Table, (Pins on Connector CN4)

 The motor action or load-current direction is controlled by active low control inputs, (0 to +5V); applied to Pin F (Forward) and/or pin R (Reverse) relative to Pin N (Neutral) on the Connector CN4. These control signals are optically isolated from the high-side of the H-Bridge, providing good noise immunity. The control actions and the required voltage and current levels are listed in the Truth-Table (given above). 

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

This plot shows the maximum average load current as a function of PWM carrier frequency (in Hz) at 100% duty-cycle.

 A Typical Application of the Si30HFHB-50V-30A-ALC

 In this open-loop application, the motor direction is controlled by 2 external normally-open switches connected to port CN4 (as shown below), selecting the direction of rotational. The switches can be replaced by open-collector transistors that can be Pulse Width Modulated (PWM).

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.

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

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