Datasheet

Application information L6566B
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Figure 7. Timing diagram showing short-circuit behavior (SS pin clamped at 5 V)
Figure 8. Zero current detection block, triggering block, oscillator block and
related logic
Vcc
(pin 5)
GD
(pin 4)
Vcc_OK
Vc c
ON
Vcc
OFF
Vcc
resta rt
I
charge
0.85 mA
Short circuit occurs here
t
t
t
t
T
rep
< 0.03T
rep
100 mV
50 mV
DRIV ER
+
-
5.7V
ZCD
PWM
GD
R
S
Q
BLANKING
TIME
COMP
+Vin
Q
L6566B
5V
-
+
MONO
STABLE
R
Z1
blanking
START
R
Z2
CS
VFF
TURN-ON
LOGIC
4:1
Counter
Strobe
FAULT
S/H
Reset
line
FFWD
OSCILLATOR
915
7
4
11
Rs
OSC
R
T
13
AUXILIARY
OSCILLATOR
FMOD
6
R
MOD
C
MOD