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

2.3 V

Clamp

Shutdown

Demag

UVP

Fault

OCP

+

−

Dynamic OVP

ESD

Shutdown

Clamp

Active

Clamp

LEB

Offset

Static OVP is triggered

when clamp is activated.

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

Q

Q

Q

Q

Q

270 mA

mV

*All SR Latches are Reset Dominant

+

−

+

−

+

−

+

−

+

−

Enable

+

−

Ct

*All values shown are typical only. Refer to the “Electrical Characteristics”

for complete specifications.