BTS50080-1TEB Datasheet, PDF (18/27 Pages) Infineon Technologies AG – Smart High-Side Power Switch PROFET™ One Channel

Smart High-Side Power Switch
BTS50080-1TEB
Protection Functions
6.4
Overvoltage Protection
Beside the output clamp for the power stage as described in Section 5.3 there is a clamp mechanism
implemented for all logic pins. See Figure 15 for details.
R_bb
V_bb
IN
IS
Figure 15 Overvoltage Protection
OUT
OverVoltage .emf
6.5
Loss of Ground Protection
In case of complete loss of the device ground connections the BTS50080-1TEB securely changes to or remains
in off state.
6.6
Loss of V_bb Protection
In case of complete loss of V_bb the BTS50080-1TEB remains in off state.
In case of loss of V_bb connection with charged inductive loads a current path with load current capability has to be
provided, to demagnetize the charged inductances. It is recommended to use a diode, a Z-diode, or a varistor
(V_ZL+V_D < 30 V or V_Zb+V_D < 16 V if R_IN = 0). For higher clamp voltages currents through IN and IS have to be limited
to -140 mA. Please refer to Figure 16 for details.
V_bb
R_{bb Vbb}
V_bb
R_{bb Vbb}
IN IS
V_D
R_IN
R_IS
inductive
LOAD
V_ZL
V_D
V_Zb
IN IS
R_IN
R_IS
Figure 16 Loss of V_bb
Vbb_disconnect_A.emf
inductive
LOAD
Vbb_disconnect_B.emf
Datasheet
18
Rev. 1.0, 2008-08-28