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NCP1615

High Voltage High Efficiency Power Factor Correction Controller

ON Semiconductor 

NCP1615

Enable PFC

HVFB

FB

Control

Line OVP

Blank Delay

FB Logic

UVP1

SoftOVP

DRE

In_Regulation

VDD

VDD

DRE

VREFAmEprrliofirer

VDD

Upper

Clamp

Line_OVP

Line Removal Line Removal

Detector

BO_NOK Brownout

Detector

Thermal

Shutdown

LLine Line Sense

ISENSE Detector

OCP

staticOVP

OverStress

Line_OVP

Standby

VREF

VDD

IREF

CENTRAL

LOGIC

Regulator

ICC(discharge)

VCC(reset)

HV

VCC

StaticOVP

Lower

Clamp BO

OFF

VCC(on)/VCC(off)

VFOVP

Level

Shift

VREGUL

VBUV

DT

Restart_OK

SKIP

Standby

softOVP

LLine

Vton

Processing

Circuitry

Internal

Timing

Ramp

Vton OFF

UVP1

Latch

Auto−Recovery

PWM

PWM

Comparator

PFC_OK

FOVP/

VUVP2 IFOVP/UVP(bias) BUV

VUVP3

Vrestart

Restart_OK IRestart(bias)

Restart

VCC

Clamp

FFcontrol

DRV

ISENSE VREGUL

OverStress

Current Information

Generator and

dead−time control

DT

CLK

SKIP

LLline DRV ZCD

In PSM

PWM

STOP

In PSM

CLK S

R

Standby

VDD

Q

DRV

GND

−

+

VDD

Vstandby

STDBY

PFCok

PFCok

Driver

QS

PFC_OK

R

In_Regulation

In PSM

PFC_OK Clear

VPSTimer2

Power

Saving

Mode (PSM)

Detector

Fault

VDD OVP

Comparator

IFault

+

Blanking

Delay

tdelay(OVP)

− VFault(OVP)

RFault(clamp)

OTP Comparator

DRV

OCP

OverStress

Detection

of excessive

current

Latch

In PSM

VPS_in/

VPS_out

VDD

Current Limit DRV

Comparator

toff1

LEB

tOCP(LEB)

VOCP

DRV

VDD

PStimer

CS/ZCD

VFault(clamp)

+

VFault(OTP) −

Blanking

Delay

tdelay(OTP)

Delay Enable PFC

tblank(OTP)

Auto−Recovery

Control

ZCD

ZCD

Comparator

Auto−Recovery

LEB

tOVS(LEB)

VZCD(rising)/

VZCD(falling)

Version A/B

Version C/D

Version A/C

Version B/D

Figure 3. NCP1615 Functional Block Diagram

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