BTS3046SDR Infineon Technologies Corporation, BTS3046SDR Datasheet - Page 16

• Manufacturer Part Number: BTS3046SDR
• Description: 46 Mohm Single Channel Smart Low Side Power Switch For 12v & 24v Application
• Manufacturer: Infineon Technologies Corporation

6
The device provides embedded protection functions. Integrated protection functions are designed to prevent IC
destruction under fault conditions described in the data sheet. Fault conditions are considered as “outside” normal
operation.
6.1
The device is protected against over temperature due to overload and / or bad cooling conditions. To ensure this
a temperature sensor located in the Power MOSFET is used.
The BTS3046SDR has a thermal-restart function. The device will turn on again, if input is still high, after the
measured temperature has dropped below the thermal hysteresis.
The protective switch off can be reset by setting the input pin voltage to low. Then the internal logic is not supplied
anymore and the next time the voltage on the IN pin rises above the input threshold voltage, the device will switch
on, if the temperature is not above the over temperature threshold.
see
Figure 12
Datasheet
I
5V
0
IN(nom)
I
IN(lim)
T
JSD
Figure
IN
I
0
T
IN
J
12.
Protection Functions
Thermal Protection
ΔT
Error Signal via Input Current at Thermal Shutdown
JSD
Thermal shutdown
restart
16
Smart low side power switch
Thermal_fault_autorestart .emf
HITFET - BTS3046SDR
Protection Functions
Rev. 1.0, 2009-12-06
t
t
t