VND670 STMicroelectronics, VND670 Datasheet - Page 7

• Manufacturer Part Number: VND670
• Description: Dual High Side Switch With Dual Power Mos Gate Driver Bridge Configuration
• Manufacturer: STMicroelectronics

WAVEFORMS AND TRUTH TABLE (CONTINUED)
In case of a fault condition the DIAG
The fault conditions are:
- overtemperature on one or both high sides;
- short to battery condition on the output (saturation detection on the external connected Power
Possible origins of fault conditions may be:
OUT
OUT
When a fault condition is detected, the user can know which power element is in fault by monitoring the IN
EN
In any case, when a fault is detected, the faulty half bridge is latched off. To turn-on the respective output (GATE
OUT
TRUTH TABLE IN FAULT CONDITIONS (detected on OUT
TEST MODE
The PWM pin allows to test the load connection between two half-bridges. In the test mode (V
Power Mos gate drivers are disabled. The IN
to connect one side of the load at V
continuity of the load connection. In case of load disconnection the DIAD
pulled down.
MOSFET).
IN
A
X
X
X
1
1
0
0
1
0
A
A
X
and DIAG
A
) again, the input signal must rise from low to high level.
is shorted to ground ---> overtemperature detection on high side A.
is shorted to V
IN
X
X
X
1
0
1
0
1
0
B
B
/EN
Fault Information
B
CC
pins.
DIAG
---> external Power MOSFET saturation detection (driven by GATE
0
0
0
0
0
0
0
0
0
A
/EN
A
CC
X
/EN
DIAG
voltage. The check of the voltage on the other side of the load allow to verify the
X
pin is considered as an output pin by the device.
1
1
1
1
0
0
0
1
1
B
A
/EN
or IN
B
B
inputs allow to turn-on the High Side A or B, respectively, in order
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
OUT
A
A
Protection Action
)
X
/EN
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
OUT
H
H
H
X
B
pin corresponding to the faulty output is
A
GATE
).
L
L
L
L
L
L
L
L
L
pwm
A
=-2V) the external
VND670SP
A
, IN
GATE
B
, DIAG
L
L
L
L
L
L
L
L
L
B
7/14
X
or
A
/