120V-25A High-Frequency H-Bridge, DC to 20kHZ PWM, with Active-High Control, Integrated Finned Heat-Sink, for Bidirectional DC Motor Driver
The Si60HFHB-120V-25A-AHC is a 120V at 25A, microprocessor based, high-frequency, H-Bridge with high-pulse (0 to +5V PWM) control input. This controller requires two active high inputs (or two 0 to 20kHz PWM inputs) on pin I1 and on pin I2 to control the speed and rotation direction of a DC motor (as shown on the truth table given below). 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 high digital (0 to +5V) control signals (VI1,G and VI2,G) 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. This board uses two power supplies to operate properly. A 9V to 120V DC (at 25A max.) power supply to control the speed of a DC motor (or load current) in forward or reverse direction. And a small 10V to 11V DC (at 0.1A max.) power supply to operate the microcontroller. A bicolor LED is used to monitor the motor (or load) voltage (Red = Forward, Green = Reverse). An integrated (5.9”x3.7”x0.6”) finned heat-sink is used to operate the bridge at 20A (continuous) current levels. Higher current-levels (30A) 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 120V) at a maximum continuous load-current of 25A. 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.
Control Input Truth Table (for Control connector CN6)
The control lines I1, I2 (VI1,G , VI2,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 Si60HFHB-120V-25A-AHC
The I1 and I2 control lines (VI1,G , VI2,G inputs, 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 above. This plot shows the maximum average load current as a function of PWM carrier frequency (in Hz) at 95% duty-cycle. The plot was obtained with the (5.9”x3.7”x0.6”) finned heat-sink (as shipped with the unit). Improved performance can be achieved with more effective heat-sinks.
A Typical Application of the Si60HFHB-120V-25A-AHC
In this open-loop application, the motor direction is controlled by 2 external normally-open switches connected to pins I1 (forward) and I2 (reverse) on port CN6 (using the internal +5V pin as shown).
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, CN2, CN5, and CN7 are available at 2 places, thus two smaller wires can be used in place of a larger one. Each Pin on these connectors are rated to 32A (or 64A Jointly).
Typical Applications: Bidirectional Speed Controller, Bidirectional DC Motor Driver. Peltier Effect or TE Cells Driver, Heat Pump Controller, PPDT Solid State Relays.
|Si60HFHB-120V-25A-AHC 120V at 25A, High-Frequency H-Bridge with Integrated Finned Heat-Sink, Active High Cont.||
Availability: We usually ship in 2-3 business days.
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