NCP1606
http://onsemi.com
2
Figure 2. Block Diagram
ESD
UVLO
DRV
GND
FB
ESD
Control
Ct
ESD
CS
ESD
ZCD
E/A
+
Measure
300
2.5 V
200 mV
2.1 V
V
CL(POS)
Clamp
Shutdown
Demag
UVP
Fault
OCP
+
Dynamic OVP
ESD
Shutdown
V
EAH
Clamp
Active
Clamp
LEB
Add V
EAL
Offset
Static OVP is triggered
when clamp is activated.
V
EAL
Clamp
Static OVP
Off Timer
Reset
PWM
R
Q
S
(Enable EA)
1.6 V
R
Q
S
R
Q
S
R
Q
S
R
Q
S
POK
nPOK
nPOK
nPOK
AC IN
DRV
V
CONTROL
R
OUT2
R
OUT1
C
COMP
R
SENSE
R
ZCD
C
BULK
Q
Q
Q
V
CC
V
OUT
V
CC
Q
Q
V
DD
V
DD
270 mA
V
DD
V
CC
V
DD
V
DDGD
V
DD
Reg
I
EAsink
mV
I
sink
>I
ovp
V
CL(NEG)
*All SR Latches are Reset Dominant
+
+
+
+
+
Enable
+
V
CS(limit)
Ct
D
BOOST
*All values shown are typical only. Refer to the Electrical Characteristics
for complete specifications.
L
BOOST
uV
DD
uV
DD
uV
DD
V
ddGD
UVLO