NCV7708

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12

Typical Operating Characteristics

Figure 5. Typical High−side Negative Clamp

Voltage vs. Reverse Current, Room Temperature

Temperature

HIGH SIDE PIN VOLTAGE (V)

−4.0

−3.0

−2.0

−1.0

0

0

−0.2

−0.4

−0.6

−0.8

−1.0

−1.2

150

100

50

0

−50

0

1.0

2.0

3.0

4.0

Applications Drawing

The applications drawing below displays the range with

which this part can drive a multitude of loads. The dotted line

connecting the outputs exhibits the NCV7708 diversity.

1. H−Bridge Driver configuration

2. Low Side Driver

3. High Side Driver

Figure 7. Application Drawing

M

VSx

OUTHx

OUTLx

GND

VSx

OUTHx

OUTLx

GND

2

1

3

+

Any combination of motors and high side drivers can be designed in. This allows for flexibility in many systems.

H−Bridge Driver Configuration

The NCV7708 has the flexibility of controlling each

driver independently. When the device is set up in an

H−Bridge configuration, the software design has to take care

of avoiding simultaneous activation of connected HS and LS

transistors. Resulting high shoot through currents could

cause irreversible damage to the device.

Overvoltage Clamping − Driving Inductive Loads

To avoid excessive voltages when driving inductive loads

in a single−side−mode (LS or HS switch, no freewheeling

path), external clamping diodes for inductive turn off of the

low side driver must be provided. The maximum clamp

voltage is 48 V. Due to high power dissipation during

clamping, the maximum energy capability of the driver

transistor has to be considered.