CV-HB-201 Datasheet, PDF (5/7 Pages) List of Unclassifed Manufacturers – 2-Amp H-Bridge

CV-HB 201 H-Bridge
The “DIS” LED (Red LED) lights up when the controller is in disabled mode, such as when the
EN pin is held low, or when any of the protection circuitry is active, such as over current, or
under voltage. When using PWM on the EN pin, the LED will glow inversely proportional to
the pulse width. At 100% pulse width, the LED is extinguished. At 0% pulse width, the LED is
fully lit.
Protection Modes:
Over-current:
When the instantaneous current is beyond the device limits, the output driver will be
pulsed to effectively limit the current. This situation can arise when a motor with a very
large startup current is first turned on at full power. As the motor spins up to speed, the
current demand will decrease, and the current limiting action will cease. When current
limiting is active, the DIS LED will be lit, its brightness proportional to the degree of
current limiting applied.
Under-voltage:
Driving the H-Bridge using N-channel MOSFETs requires a gate voltage approximately
10 volts above the supply voltage. To accomplish this, the controller features an
integrated charge pump to boost the gate voltage to the high-side MOSFETs. When the
supply voltage to the controller is too low to sustain proper charge pump action, the
controller will go into shutdown mode, disabling all motor outputs, and illuminating the
DIS LED. When the voltage rises above the minimum level, the controller will be re-
enabled automatically.
Over-temperature:
During normal operation within the maximum limits of the controller, the controller
should not go into over-temperature shut down. In the event that the internal die
temperature reaches approximately 160 degrees C, the controller will automatically shut
down to prevent damage.
Fuse Activated:
A 4-amp resettable fuse is integrated into the controller. If the fuse activates, simply
remove power, allow a minute for the fuse to reset, check all wiring, and re-apply power.
Reverse Polarity:
An on-board diode prevents any damage should the board be inadvertently connected
backwards to the power supply.
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