Datasheet

5/13
L6561
dently from the average output voltage. The precision in setting the overvoltage threshold is 7% of the ov-
ervoltage value (for instance ∆V = 60V ± 4.2V).
3.1 Disable function
The zero current detector (ZCD) pin can be used for device disabling as well. By grounding the ZCD volt-
age the device is disabled reducing the supply current consumption at 1.4mA typical (@ 14.5V supply volt-
age).
Releasing the ZCD pin the internal start-up timer will restart the device.
Figure 4.
Figure 5. Overvoltage Protection Circuit
V
OUT nominal
I
SC
40µA
E/A OUTPUT
2.25V
DYNAMIC OVP
STATIC OVP
D97IN592A
OVER VOLTAGE
10µA
+Vo
D97IN591
-
+
2
R1
R2
Ccomp.
E/A
1
2.5V
∆I
-
+
X PWM DRIVER
2.25V
40µA
∆I