The Robot Power Simple-H is a low-cost robust H-bridge circuit suitable for use driving DC motors and other DC loads in the ~25A and 6V-28V range. A wide range of command sources from switches to 555 timer circuits to microcontrollers, BasicStamps and Arduinos may be used to control the Simple-H. The classic "green" Simple-H requires 3V-5V logic level signals on its command inputs.
The Simple-H does not have any on-board logic to interpret R/C, serial, analog voltage or other commands. An external signal source is required to translate command inputs into the switching signals needed to drive the Simple-H power chips. This flexibility allows the Simple-H to be driven from from a signal source as simple as a pushbutton or as complex as a microcontroller or BasicStamp. Even a desktop or laptop PC can be used through a parallel port or USB port expander.
The Simple-H HV is a version of the Simple-H that allows up to 28V input signals. The circuit board footprint and mounting pattern is exactly the same between the two versions. The indicator LEDs on the HV have a constant-current driver so their output is independent of signal voltage and does not load the input signal. These features allow the Simple-H to be controlled by using switches directly off the 12V or 24V battery voltage rather than requiring a 5V regulator to condition the input command voltages. Also 12V/24V outputs from PLC modules may now be used directly to drive a Simple-H.
Unlike many competing products which advertise similar current ratings, the Simple-H ratings are for a period measured in minutes or hours not a few seconds or less. One competitor even advertises a 30A controller where the 30A rating is for "a few milliseconds". With a Simple-H you can be sure if you need 20A of current you can get 20A out of it for as long as you need it.
|Supply Voltage ||5V to 28V (24V max battery rating) |
|Continuous Discharge ||20A (25A with fan) |
| Max Discharge ||>45A |
|Weight ||1.3 oz |
|Power Chips ||2 each BTS7960B |
|On Resistance ||0.016 ohm max at 25C |
|PWM Frequency ||DC to 20kHz |
|Cooling ||Heatsinks |
|Logic Interface ||3-5V, miniumum 3 pins required |
|Current and Temp Limiting ||Built in to power chips |
|Current Sense Outputs ||0.0745V per Amp -- 2.98V at 40A |
|Connectors ||8-pos 0.1" screw terminal, 2-pos fan terminal, 4 each screw terminals for power wires |
|Enclosure ||None |