NCP1601AP Datasheet NCP1601BDR2G, NCP1601ADR2, NCP1601APG | P1-P3

 Semiconductor Components Industries, LLC, 2010

December, 2010 -- Rev . 6

1 Publication Order Number:

NCP1601A/D

NCP1601A, NCP1601B

Compact Fixed Frequency

Discontinuous or Critical

Conduction Voltage Mode

Power Factor Correction

Controller

The NCP1601 is a controller designed for Power Factor Correction

(PFC) boost c ircuits. The device operates in fixed--frequency

Discontinuous Conduction Mode (DCM) and variable--frequenc y

Critical Conduction Mode (CRM) and takes advantages from both

operating modes. DCM limits the maximum switching frequency. It

simplifies the front--ended EMI filter design. CRM limits the

maximum currents of the boost stage diode , MOSFET and inductor.

It reduces the costs and improves the reliability of the circuit. This

devic e substantially exhibits uni ty power factor while operating i n

DCM and CRM. The NCP1601 minimizes the required number of

external component s. It incorporates high safety protection features

that make the NCP1601 suitable for robust and compact PFC stages.

Features

 Near--Unity Power Factor in DCM or CRM

 Voltage--Mode Operation

 Low Startup and Shutdown Current Consumption

 Programmable Switching Frequency for DCM

 Synchronization Capability

 Overvoltage Protection (107% of Nominal Output Level)

 Undervoltage Protection or Shutdown

(8% of Nominal Output Level)

 Programmable Overcurrent Protection

 Therma l Shutdown wit h Hyste resis (95/140C)

 Two V

Undervolta ge Lockout Hysteresis Options:

4.75 V for NCP1601A and 1.5 V for NCP1601B

 These are Pb--Free Devices

Typical Applications

 Elec tronic Light Ballast

 AC Adapters

 TV & Monitors

 Mid--Power Applications

MARKING

DIAGRAM

x=AorB

A = Assembly Location

L, WL = Wafer Lot

Y, YY = Year

W, WW = Work Week

G = Pb--Free Package

http://onsemi.com

PDIP--8

N SUFFIX

CASE 626

SOIC--8

D SUFFIX

CASE 751

NCP1601x

AWL

YYWWG

1601x

ALYW

PIN CONNECTIONS

control

Ramp

Drv

GND

Osc

(Top View)

See detailed ordering and shipping information in the package

dimensions section on page 16 of this data sheet.

ORDERING INFORMATION

NCP1601A, NCP1601B

http://onsemi.com

Input

EMI

Filter

Output

Ramp GND

control

Drv

FB V

CS Osc

15 V

NCP1601X

Figure 1. Typical Application Circuit

Figure 2. Functional Block Diagram

ref

reg

96%

Input

EMI

Filter

filter

off

bulk

Output V oltage (V

out

)

FB / SD

control

18 V

CC(on)

/9V

300 k

Current

Mirror

Vcontrol Processing

UVLO

Regulation Block

Current

Mirror

3.9 Vmax

clamp

Internal Bias

Reference

Block

ref

Overvoltage

Protection

> 107% I

ref

)

Overcurrent

Protection

> 203 mA)

Zero Current

Detection

<14mA)

Shutdown / UVP

<8%I

ref

)

PFC

Modulation

Thermal

Shutdown

(95 / 140 C)

ton

ramp

Ramp

45 mA

94 mA

OSC

Osc / Sync

Oscillator / Synchronization Block

Output

Driver

Drv

GND

delay

5/3.5V

NCP1601A, NCP1601B

http://onsemi.com

PIN F UNCTION DESCRIPTION

Pin Symbol Function Function

1 FB Feedback /

Shutdown

This pin receives a current I

which is proportional to the PFC circuit output voltage. The current is

for the output regulation, output Overvoltage Protection (OVP), and output undervoltage protection

(UVP).

When I

goes above 107% I

ref

, OVP is activated and the Drive Output is disabled.

When I

goes below 8% I

ref

, the device enters a low--current consumption shutdown mode.

2 V

control

Control The voltage of this pin V

control

directly controls the input impedance and hence the power factor of

the circuit. This pin is connected to an external capacitor to limit the control voltage V

control

band-

width typically below 20 Hz to achieve Power Factor Correction.

3 Ramp Ramp This pin is connected to an external capacitor to set a ramp signal. The capacitor value directly

affects the input impedance of the PFC circuit and hence the maximum input power.

4 CS Current Sense This pin sources a current I

which depends on the inductor current and an offset voltage. The

current is for Overcurrent Protection (OCP) and zero current detection.

When I

is above 200 mA, OCP is activated and the Drive Output is disabled.

When I

is below 14 mA, the circuit detects a zero current. This information is used by the on--time

modulation arrangement and by the oscillator block.

5 Osc Oscillator /

Synchronization

In oscillator mode, this pin is connected to an external capacitor to set the oscillator frequency of

the DCM operation.

In synchronization mode, this pin is connected to an external driving signal. The positive edge of the

drive output is synchronized to the negative edge of the external signal in DCM operation.

If the inductor current is non--zero at the end of a switching period, the output drive is not allowed to

turn on. CCM operation is prohibited. Instead, the circuit operates in CRM in this case.

6 GND The IC ground --

7 Drv Drive Output This pin provides an output to an external MOSFET.

8 V

Supply V oltage This pin is the positive supply of the device. The operating range is between 9 V and 18 V with

UVLO start threshold 13.75 V for NCP1601A and 10.5 V for NCP1601B.

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P19

NCP1601AP

Mfr. #:

Buy NCP1601AP

Manufacturer:

ON Semiconductor

Description:

IC CTRLR PFC FREQ DCM/CRM 8DIP

Lifecycle:

New from this manufacturer.

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NCP1601AP

NCP1601AP

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