BTS 7960B Infineon Technologies, BTS 7960B Datasheet - Page 14

• Manufacturer Part Number: BTS 7960B
• Manufacturer: Infineon Technologies

Specifications of BTS 7960B

• Packages: P-TO263-7
• Operating Range: 5.5 - 27.6 V
• Rds (on) (typ): 16.0 mOhm
• Id(lim): 43.0 A
• Iq (typ): 7.0 µA
• Diagnosis: OV, OT, OC-failure flag, current sense

4.3
The device provides integrated protection functions. These are designed to prevent IC
destruction under fault conditions described in the data sheet. Fault conditions are
considered as “outside” normal operating range. Protection functions are not to be used
for continuous or repetitive operation, with the exception of the current limitation
(Chapter
possible independent of the connected slew rate resistor. Overvoltage, overtemperature
and overcurrent are indicated by a fault current I
paragraph
Figure
In the following the protection functions are listed in order of their priority. Overvoltage
lock out overrides all other error modes.
4.3.1
To assure a high immunity against overvoltages (e.g. load dump conditions) the device
shuts the lowside MOSFET off and turns the highside MOSFET on, if the supply voltage
is exceeding the over voltage protection level
again with a hysteresis
voltage
freewheeling in highside during over voltage.
4.3.2
To avoid uncontrolled motion of the driven motor at low voltages the device shuts off
(output is tri-state), if the supply voltage drops below the switch-off voltage
IC becomes active again with a hysteresis
switch-on voltage
4.3.3
The BTS 7960 is protected against overtemperature by an integrated temperature
sensor. Overtemperature leads to a shut down of both output stages. This state is
latched until the device is reset by a low signal with a minimum length of
pin, provided that its temperature has decreased at least the thermal hysteresis
meantime.
Repetitive use of the overtemperature protection might reduce lifetime.
4.3.4
The current in the bridge is measured in both switches. As soon as the current in forward
direction in one switch (high side or low side) is reaching the limit
deactivated and the other switch is activated for
Data Sheet
10.
V
OV(ON)
4.3.4). In a fault condition the BTS 7960 will apply the highest slew rate
“Status Flag Diagnosis With Current Sense Capability” on Page 17
Protection Functions
Overvoltage Lock Out
Undervoltage Shut Down
Overtemperature Protection
Current Limitation
. In H-bridge configuration, this behavior of the BTS 7960 will lead to
V
UV(ON)
V
.
OV(HY)
if the supply voltage decreases below the switch-on
13
V
UV(HY)
V
Block Description and Characteristics
OV(OFF)
t
CLS
IS(LIM)
if the supply voltage rises above the
. During that time all changes at the
High Current PN Half Bridge
. The IC operates in normal mode
at the IS pin as described in the
Rev. 1.1, 2004-12-07
I
CLx
t
, this switch is
reset
V
UV(OFF)
BTS 7960
at the INH
T
in the
. The
and