VNH5019A-E datasheet

VNH5019A-E Electrical specifications
Doc ID 15701 Rev 7 15/34
Figure 5. Typical application circuit for DC to 20 kHz PWM operation with reverse battery
protection (option B)
)
In case of a fault condition the DIAG
X
/EN
X
pin is considered as an output pin by the device.
The fault conditions are:
● overtemperature on one or both high-sides (for example, if a short to ground occurs as
it could be the case described in line 1 and 2 in the Ta bl e 1 3 );
● Short to battery condition on the output (saturation detection on the low-side
Power MOSFET).
M
μ
C
Reg 5V
+ 5V
HS
A
HS
B
LS
A LS
B
V
CC
DIAG
A
/EN
A
CS
IN
A
PWM
OUT
A
OUT
B
D
S
G
3.3K
1K
1K
1K
10K
33nF
1.5K
V
CC
100K
V
BAT
CP
DIAG
B
/EN
B
+5V
1K
3.3K
IN
B
1K
GND
A
GND
B
C
Note:
The value of the blocking capacitor (C) depends on the application conditions and defines voltage and current ripple onto supply line at PWM
operation. Stored energy of the motor inductance may flyback into the blocking capacitor, if the bridge driver goes into 3-state. This causes a
hazardous overvoltage if the capacitor is not big enough. As basic orientation, 500 µF per 10 A load current is recommended.
Table 12. Truth table in fault conditions (detected on OUT
A
)
IN
A
IN
B
DIAG
A
/EN
A
DIAG
B
/EN
B
OUT
A
OUT
B
CS (V
CSD
=0V)
1 1 0 1 OPEN H High imp.
1 0 0 1 OPEN L High imp.
0 1 0 1 OPEN H I
OUTB
/K
0 0 0 1 OPEN L High imp.
X X 0 0 OPEN OPEN High imp.
X 1 0 1 OPEN H I
OUTB
/K
X 0 0 1 OPEN L High imp.