L6561
the overvoltage value (for instance
∆V
= 60V
±
4.2V).
Disable function
The zero current detector (ZCD) pin can be used
Figure 1.
OVER VOLTAGE
for device disabling as well. By grounding the
ZCD voltage the device is disabled reducing the
supply current consumption at 1.4mA typical (@
14.5V supply voltage).
Releasing the ZCD pin the internal start-up timer
will restart the device.
V
OUT nominal
I
SC
40µA
10µA
E/A OUTPUT
2.25V
DYNAMIC OVP
STATIC OVP
D97IN592A
Figure 2. Overvoltage Protection Circuit
Ccomp.
+Vo
R1
1
R2
-
+
2.5V
-
2.25V
∆I
+
E/A
∆I
2
X
PWM
DRIVER
40µA
D97IN591
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