BTS7970B Infineon Technologies, BTS7970B Datasheet - Page 17

• Manufacturer Part Number: BTS7970B
• Manufacturer: Infineon Technologies

Specifications of BTS7970B

• Operating Current: 3mA
• Operating Temperature Classification: Automotive
• Package Type: TO-263
• Operating Supply Voltage (min): 5.5V
• Operating Supply Voltage (max): 28V
• Lead Free Status / Rohs Status: Not Compliant

Figure 11
In combination with a typical inductive load, such as a motor, this results in a switched
mode current limitation. That way of limiting the current has the advantage that the power
dissipation in the BTS 7970B is much smaller than by driving the MOSFETs 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 only
as long as the specified maximum junction temperature is not exceeded. Exceeding this
temperature can reduce the lifetime of the device.
4.3.5
The device is short circuit protected against
• output short circuit to ground
• output short circuit to supply voltage
• short circuit of load
The short circuit protection is realized by the previously described current limitation in
combination with the over-temperature shut down of the device.
Please note: Due to the higher priority of the overvoltage protection the short circuit
protection is inactive in overvoltage conditions.
Data Sheet
High Side Switch
I
CLH
80
60
70
65
A
75
6
Short Circuit Protection
8
Typical Current Limitation Detection Levels vs. Supply Voltage
10
T
T
T
12
j
j
j
= -40°C
= 150°C
= 25°C
14
16
V
S
18
V
20
16
Low Side Switch
I
CLL
Block Description and Characteristics
80
60
70
65
A
75
6
High Current PN Half Bridge
8
10
12
T
T
T
j
j
14
Rev. 2.0, 2006-05-09
j
= -40°C
= 150°C
= 25°C
16
BTS 7970B
V
18
S
V
20