Data Sheet

FAN7093_F085
High Current PN Half Bridge
December 2011
current dI/dt.
Figure 4 Timing Diagram Current Limitation (Inductive Load)
In combination with a typical inductive load, such as a motor, this results in a switched mode current
limitation. This method of limiting the current has the advantage of greatly reduced power dissipation
in the FAN7093_F085 compared to driving the MOSFET in linear mode. Therefore it is possible to
use the current limitation for a short time without exceeding the maximum allowed junction
temperature (e.g. for limiting the inrush current during motor start up). However, the regular use of the
current limitation is allowed as long as the specified maximum junction temperature is not exceeded.
Exceeding this temperature can reduce the lifetime of the device.
7.2.5 Short Circuit Protection
The device is short circuit protected against
• output shorted to ground
• output shorted to battery voltage
• short circuit of load
The short circuit protection is a combination of current limit and over-temperature shut down of the
device
7.2.6 Electrical Characteristics - Protection Functions
VBATT = 7 V to 18 V, T
j
= -40 °C to +150 °C, all voltages with respect to ground, positive current flowing into pin
(unless otherwise specified)
FAN7093_F085 Rev. C1 www.fairchildsemi.com10