Robot MarketPlace - Simple-H HV H-Bridge

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.

Features

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