User Manual

3. Application Configurations
J1 EA On
J1 CA On
PA PWM Fwd
PB PWM Rev
EA Enable
CA Current Sense
EB N/C
CB N/C
J1 EAB On
J1 CAB On
PA PWM Motor 1
PB PWM Motor 2
EA Enable Mot 1
CA Current Mot 1
EB Enable Mot 2
CB Current Mot 2
J1 EA On
J1 CAB On
PA PWM M1
PB
Tie to PA
EA Enable
CA Current A*
EB N/C
CB N/C
* The current reading will only be for the current passing through the M1 power chip, which is
½ of the total.
When connected, as an H-bridge the Simple-H is suitable for driving DC brushed motors both
forward and reverse with variable speed. It may also be used to drive other bi-directional
loads such as Peltier junctions, bi-directional solenoids, electromagnets and other DC loads.
Pulse-width modulation may be applied to the inputs of the Simple-H to vary the average
voltage applied to the load. Thus the Simple-H supports both variable speed and direction of
a single load. Since the Simple-H supports 100% ON and OFF periods for the inputs, you
may use mechanical or electrical switches or binary signals to activate the power chips.
When switches are used the full battery voltage will be applied to the load at all times so no
variation in speed is possible.
When connected in half-bridge mode the Simple-H may be used for driving uni-directional
loads such as lamps, heaters, solenoids or DC motors in one direction. The true half-bridge
configuration of the power elements in the drive chips allow for efficient driving of loads with
variable speed when compared to a single low- or high-side switch configuration with a
recirculation (Schottky) diode. The Simple-H half-bridge drive features improved heat
dissipation and current capacity along with temperature and current protection and current
sensing.