Diodes AP1662 User Manual

Data Sheet

HIGH PERFORMANCE POWER FACTOR CORRECTOR AP1662

General Description

The AP1662 is an active power factor control IC which is designed mainly for use as a pre-converter in electronic ballast, AC-DC adapter and off-line SMPS applications. . The IC includes an internal start-up timer for stand-alone applications, a one-quadrant multiplier to realize near unity power factor and a zero current detector to ensure DCM boundary conduction operation.

The totem pole output stage is capable of driving power MOSFET with 600mA source current and 800mA sink current.

Designed with advanced BiCMOS process, the AP1662 features low start-up current, low operation current and low power dissipation. The AP1662 also has rich protection features including over-voltage protection, input under-voltage lockout with hysteresis and multiplier output clamp to limit maximum peak current.

The AP1662 meets IEC61000-3-2 standard even at one-quadrant load and THD lower than 10% at high-end line voltage and full load.

The IC is available in SOIC-8 and DIP-8 packages.

Features

Comply with IEC61000-3-2 Standard

•

• Proprietary Design for Minimum THD

• Zero Current Detection Control for DCM Boundary Conduction Mode

• Adjustable Output Voltage with Precise Over-voltage Protection

• Low Start-up Current with 40µA Typical Value

• Low Quiescent Current with 2.5mA Typical Va lu e

• 1% Precision Internal Reference Voltage @ T

=25°C

J

• Internal Start-up Timer

• Disable Function for Reduced Current Consumption

• Totem Pole Output with 600mA Source and 800mA Sink Current Capability

• Under-voltage Lockout with 2.5V Hysteresis

Applications

• Electronic Ballast

• AC-DC Adapter

• Off-line SMPS

• Single Stage PFC LED Driver

SOIC-8 DIP-8

Figure 1. Package Types of AP1662

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Data Sheet

HIGH PERFORMANCE POWER FACTOR CORRECTOR AP1662

Pin Configuration

M Package

（SOIC-8）

INV VCC

1

8

COMP GD

2

7

MULT GND

3

6

CS ZCD

4

5

P Package

（DIP-8）

INV VCC

1

8

COMP GD

2

7

MULT GND

3

6

CS ZCD

4

5

Figure 2. Pin Configuration of AP1662 (Top View)

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Data Sheet

HIGH PERFORMANCE POWER FACTOR CORRECTOR AP1662

Pin Description

Pin Number Pin Name Function

1 INV Inverting input of the error amplifier

2 COMP Output of the error amplifier

3 MULT Input of the multiplier

4 CS Input of the current control loop comparator

5 ZCD

6 GND

7 GD Gate driver output

Zero current detection input. If it is connected to GND, the device is disabled Ground. Current return for gate driver and control circuits of the IC

8 VCC Supply voltage of gate driver and control circuits of the IC

Functional Block Diagram

Figure 3. Functional Block Diagram of AP1662

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Data Sheet

HIGH PERFORMANCE POWER FACTOR CORRECTOR AP1662

Ordering Information

AP1662 -

Circuit Type E1: Lead Free

Package

SOIC-8

G1: Green

Package Blank: Tube M: SOIC-8

P: DIP-8

Temperature

Range

-40 to 105°C

TR: Tape & Reel

Part Number Marking ID

Lead Free Green Lead Free Green

AP1662M-E1 AP1662M-G1 1662M-E1 1662M-G1 Tube

AP1662MTR-E1 AP1662MTR-G1 1662M-E1 1662M-G1 Tape & Reel

Packing

Type

DIP-8

-40 to 105°C

AP1662P-E1 AP1662P-G1 AP1662P-E1 AP1662P-G1 Tube

BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with “G1” suffix are available in green packages.

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Data Sheet

HIGH PERFORMANCE POWER FACTOR CORRECTOR AP1662

Absolute Maximum Ratings (Note 1)

Parameter Symbol Value Unit

Power Supply Voltage VCC Self-limited V

Operating Supply Current ICC 30 mA

Input/Output of Error Amplifier, Input of Multiplier

Current Sense Input VCS -0.3 to 7 V

V

INV

V

, V

MULT

COMP

,

-0.3 to 7 V

Zero Current Detector Input I

Power Dissipation and Thermal characteristics @ T

=50°C

A

Thermal Resistance (Junction to Ambient)

P

R

ZCD

TOT

θJA

mA

Sink 10

DIP-8 1

W

SOIC-8 0.65

DIP-8 100

ºC/W

SOIC-8 150

Operating Junction Temperature TJ -40 to 150 ºC

Source -50

Storage Temperature Range T

Lead Temperature (Soldering, 10 Seconds)

ESD (Human Body Model) V

ESD (Machine Model) V

-65 to 150 ºC

STG

260 ºC

T

LEAD

ESD(HBM)

ESD(MM)

3000 V

200 V

Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability.

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Data Sheet

HIGH PERFORMANCE POWER FACTOR CORRECTOR AP1662

Electrical Characteristics

V

=12V, TJ =-25°C to 125°C, CO=1nF, unless otherwise specified.

CC

Parameter Symbol Test Conditions Min Typ Max Unit Under Voltage Lockout Section

Turn-on Threshold V

Turn-off Threshold V

Hysteresis V

VCC Rising 11 12 13 V

CC-ON

VCC Falling 8.7 9.5 10.3 V

CC-OFF

2.2 2.5 2.8 V

CC-HYS

VCC Operating Range VCC After turn-on 10.3 22 V

Zener Voltage V

ICC=20mA 22 24 V

Z

Total Supply Current Section

Start-up Current I

START-UP

Operating Supply Current ICC

Quiescent Current IQ After turn on 2.5 3.75 mA

Quiescent Current IQ

VCC=11V before turn-on 40 70

Frequency=70kHz 3.5 5

In OVP condition

=2.7V

V

INV

≤150mV, VCC>V

V

ZCD

V

≤150mV, VCC<V

ZCD

CC-OFF

1.4 2.2

2.2 mA

20 50 90

µA

mA

µA

Error Amplifier Section

=25ºC 2.465 2.5 2.535

T

Voltage Feedback Input Threshold

V

INV

J

10.3V<VCC<20V 2.44 2.56

V

Line Regulation VCC=10.3V to 20V 2 5 mV

Input Bias Current I

V

INV

=0 to 3V -0.1 -1

INV

µA

Voltage Gain GV Open Loop 60 80 dB

Gain Bandwidth GB 1 MHz

Output Voltage

Output Current

Upper Clamp Voltage Lower Clamp Voltage Source Current

Sink Current I

V

I

COMP-H

COMP-L

COMP-H

COMP-L

I

SOURCE

I

SINK

V

COMP

V

COMP

=0.5mA 5.15 5.55 5.85

V

=0.5mA 2.1 2.25 2.4

=4V, V

=2.4V -2 -4 -8

INV

mA

=4V, V

=2.6V 2.5 4.5

INV

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Data Sheet

HIGH PERFORMANCE POWER FACTOR CORRECTOR AP1662

Electrical Characteristics (Continued)

V

=12V, TJ =-25°C to 125°C, CO=1nF, unless otherwise specified.

CC

Parameter Symbol Test Conditions Min Typ Max Unit Multiplier Section

Linear Input Voltage Range Output Maximum Slope

△V

0 to 3

V

MULT

△ VCS/

MULT

Gain k V

Current Sense Section

V

: 0 to 0.5V,

MULT

=Upper Clamp Voltage

V

COMP

=1V, V

MULT

COMP

1.65 1.9

=4V 0.6 0.75 0.9 1/V

0 to

3.5

V

Input Bias Current ICS VCS=0V -1

V

Current Sense Offset Voltage Current Sense Reference Clamp

V

Delay to Output t

CS-OFFSET

CS-CLAMP

d(H-L

) 200 350

=0V 30

MULT

V

=2.5V 5

MULT

= Upper Clamp

V

COMP

Voltage, V

MULT

= 2.5V

1.6 1.7 1.8

µA

mV

V

ns

Zero Current Detection Section

Arming Voltage (positive-going edge) Triggering Voltage (negative-going edge)

Upper Clamp Voltage V

Lower Clamp Voltage

Source Current Capability Sink Current Capability

Sink Bias Current I

(Note 2) 2.1

V

ZCDA

(Note 2) 1.6

V

ZCDT

=20µA 4.5 5.1 5.9

I

ZCD

ZCD-H

V

ZCD-L

I

ZCD-SR

I

ZCD-SN

ZCD-B

I

=3mA 4.7 5.2 6.1

ZCD

I

= -3mA 0.3 0.65 1

ZCD

-2.5 -10

3

1V ≤ V

≤ 4.5 V 2

ZCD

V

mA

µA

Disable Threshold V

Disable Hysteresis V

Restart Current After Disable

ZCD-DIS

ZCD-HYS

I

ZCD-RES

150 200 250

100

V

ZCD<VDIS

, VCC>V

-80 -120

CC-OFF

mV

µA

Note 2: Limits over the full temperature are guaranteed by design, but not tested in production.

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K

Data Sheet

HIGH PERFORMANCE POWER FACTOR CORRECTOR AP1662

Electrical Characteristics (Continued)

V

=12V, TJ =-25°C to 125°C, CO=1nF, unless otherwise specified.

CC

Parameter Symbol Test Conditions Min Typ Max Unit Drive Output Section

I

GD-SOURCE

V

Dropout Voltage

Output Voltage Rise Time

Output Voltage Fall Time tF 30 70

Output Clamp Voltage V

UVLO Saturation VOS

OH

VOL I

t

R

O-CLAMP

I

GD-SOURCE

GD-SINK

40 80

I

GD-SOURCE

V

CC

V

CC

I

SIN

=200mA 2.5 3

=20mA 2 2.8

=200mA 0.9 1.9

=20V =0 to V

=10mA

=5mA

CC-ON

,

9 11 13

1.1

Output Over Voltage Section

OVP Triggering Current I

Static OVP Threshold V

OVP

OVP_TH

35 40 45 µA

2.1 2.25 2.4

Starter

Start Timer Period t

START

75 130 300

V

ns

V

µs

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Data Sheet

HIGH PERFORMANCE POWER FACTOR CORRECTOR AP1662

Typical Performance Characteristics

3.0

2.5

2.0

1.5

1.0

Supply Current (mA)

0.5

0.0 0 5 10 15 20 25

Supply Voltage (V)

CO=1nF f=70kHz

=25oC

T

J

12.5

12.0

11.5

11.0

10.5

Voltage (V)

10.0

9.5

9.0

-50 0 50 100 150

V

CC-OFF

Junction Temperature (oC)

V

CC-ON

Figure 4. Supply Current vs. Supply Voltage Figure 5. Start-up & UVLO vs. T

8

4

2

1

(mA)

CC

I

0.0625

0.03125

VCC=12V

0.5

C

=1nF

O

0.25

f=70kHz

0.125

-50 0 50 100 150

Junction Temperature (

Quiescent

Disabled or during OVP

Before start-up

o

C)

28

27

26

(V)

25

CC-CLAMP

V

24

23

22

-50 0 50 100 150

Junction Temperature (oC)

Figure 6. ICC Consumption vs. TJ Figure 7. VCC Zener Voltage vs. TJ

J

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Data Sheet

HIGH PERFORMANCE POWER FACTOR CORRECTOR AP1662

Typical Performance Characteristics (Continued)

2.60

2.55

2.50

(V)

REF

V

2.45

2.40

-50 0 50 100 150

Junction Temperature (

Figure 8. Feedback Reference Voltage vs. TJ Figure 9. OVP Current vs. T

500

400

300

(ns)

200

d(H-L)

t

100

0

-50 0 50 100 150

Junction Temperature (

Figure 10. Delay-to-Output vs. TJ Figure 11. E/A Output Clamp Levels vs. TJ

VCC=12V

O

C)

VCC=12V

o

C)

43.0

42.5

42.0

41.5

41.0

(µA)

OVP

I

40.5

40.0

39.5

39.0

-50 0 50 100 150

Junction Temperature (

6.0

5.5

5.0

4.5

(V)

4.0

COMP

V

3.5

3.0

2.5

2.0

-50 0 50 100 150

Upper Clamp

Lower Clamp

Junction Temperature (oC)

VCC=12V

o

C)

J

VCC=12V

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Data Sheet

HIGH PERFORMANCE POWER FACTOR CORRECTOR AP1662

Typical Performance Characteristics (Continued)

2.0

1.0

1.8

1.6

(V)

1.4

CS-CLAMP

V

1.2

1.0

-50 0 50 100 150

Junction Temperature (

VCC=12V V

COMP

o

C)

=Upper Clamp

0.8

VCC=12V V

=4V

0.6

0.4

Multiplier Gain

0.2

0.0

-50 0 50 100 150

Junction Temperature (

COMP

V

=1V

MULT

o

C)

Figure 12. V

CS-CLAMP

0

-2

-4

(mA)

ZCD

I

-6

-8

-50 0 50 100 150

Junction Temperature (

Figure 14. ZCD Source Capability vs. TJ Figure 15. ZCD Clamp Levels vs. TJ

vs. TJ Figure 13. Multiplier Gain vs. T

VCC=12V V

ZCD

=Lower Clamp

o

C)

7

6

5

4

(V)

ZCD

3

V

2

1

0

-50 0 50 100 150

Junction Temperature (

Upper Clamp

Lower Clamp

VCC=12V I

= + 2.5mA

ZCD

o

C)

J

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Data Sheet

HIGH PERFORMANCE POWER FACTOR CORRECTOR AP1662

Typical Performance Characteristics (Continued)

200

190

180

170

160

(µS)

START

150

t

140

130

120

-50 0 50 100 150

Junction Temperature (

1.8

VCC=12V

o

C)

1.6

1.4

1.2

1.0

(V)

CS

0.8

V

0.6

0.4

0.2

0.0

0.00.51.01.52.02.53.03.54.04.5

V

=5.0

COMP

=4.5

COMP

V

=MAX

COMP

V

=4.0

COMP

V

(V)

MULT

COMP

V

=3.5

COMP

=3.2

=3.0

=2.8

=2.6

Figure 16. Start-up Timer vs. TJ Figure 17. Multiplier Characteristics

I

GD

(mA)

6

5

4

(V)

3

GD

V

2

1

0

0 200 400 600 800 1000

TJ=25oC VCC=11V SINK

Figure 18. Gate-driver Output Low Saturation Figure 19. Gate-driver Output High Saturation

VGD (V)

V

-2.0

CC

-2.5

V

CC

-3.0

V

CC

V

-3.5

CC

V

-4.0

CC

0 100 200 300 400 500 600 700

TJ=25oC VCC=11V SOURCE

I

(mA)

GD

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Data Sheet

HIGH PERFORMANCE POWER FACTOR CORRECTOR AP1662

Typical Performance Characteristics (Continued)

15

1.1

(V)

V

1.0

0.9

0.8

GD_OFF

0.7

0.6

14

13

(V)

12

GD_CLAMP

V

11

VCC=20V

VCC=0V

10

-50 0 50 100 150

Junction Temperature (

o

C)

0.5

-50 0 50 100 150

Junction Temperature (oC)

Figure 20. Gate-driver Clamp vs. TJ Figure 21. UVLO Saturation vs. T

J

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∆

×−×

=

Data Sheet

HIGH PERFORMANCE POWER FACTOR CORRECTOR AP1662

Functional Block Description

AP1662 is a high performance power factor correction controller which operates in DCM boundary conduction mode. The PFC converter's switch will be turned on when the inductor current reduces to zero and turned off when the sensed inductor current reaches the required reference which is decided by the output of multiplier.

Error Amplifier and Over-Voltage Protection

The error amplifier regulates the PFC output voltage. The internal reference on the non-inverting input of the error amplifier is 2.5V. The error amplifier's inverting input (INV) is connected to an external resistor divider which senses the output voltage. The output of error amplifier is one of the two inputs of multiplier. A compensation loop is connected outside between INV and the error amplifier output. Normally, the compensation loop bandwidth is set very low to realize high power factor for PFC converter.

To make the over voltage protection fast, the internal OVP function is added. If the output over voltage happens, excess current will flow into the output pin of the error amplifier through the feedback compensation capacitor. (see Figure 22) The AP1662 monitors the current flowing into the error amplifier output pin. When the detected current is higher than 40µA, the dynamic OVP is triggered. The IC will be

Figure 22. Error Amplifier and OVP Block

disabled and the drive signal is stopped. If the output over voltage lasts so long that the output of error amplifier goes below 2.25V, static OVP will take place. Also the IC will be disabled until the output of error amplifier goes back to its linear region. R1 and R2 (see Fig. 22) will be selected as below:

1

V

R

O

1

−=

5.22

V

OVP

40

A

µ

R

1

=

Multiplier

The multiplier has two inputs. One (Pin 3) is the divided AC sinusoidal voltage which makes the current sense comparator threshold voltage vary from zero to peak value. The other input is the output of error amplifier (Pin 2). In this way, the input average current wave will be sinusoidal as well as reflects the load status. Accordingly a high power factor and good THD are achieved. The multiplier transfer character is designed to be linear over a wide dynamic range, namely, 0V to 3V for Pin 3 and 2V to

5.8V for Pin 2. The relationship between the multiplier output and inputs is described as below equation：

VVkV

)5.2(

MULTCOMPCS

where VCS (Multiplier output) is the reference for the current sense, k is the multiplier gain, V

COMP

voltage on pin 2 (error amplifier output) and V the voltage on pin 3.

Current Sense/Current Sense Comparator

The PFC switch's turn-on current is sensed through an external resistor in series with the switch. When the sensed voltage exceeds the threshold voltage (the multiplier output), the current sense comparator will become low and the external MOSFET will be turned off. This insures a cycle-by-cycle current mode control operation. The maximum current sense reference is 1.8V. The max value usually happens at startup process or abnormal conditions such as short load.

is the

is

MULT

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Data Sheet

HIGH PERFORMANCE POWER FACTOR CORRECTOR AP1662

Functional Block Description （Continued）

Zero Current Detection

AP1662 is a DCM boundary conduction current mode PFC controller. Usually, the zero current detection (ZCD) voltage signal comes from the auxiliary winding of the boost inductor. When the

ZCD pin voltage decreases below 1.6V, the gate drive signal becomes high to turn on the external MOSFET. 500mV of hysteresis is provided to avoid false triggering. The ZCD pin can be used for disabling the IC. Making its voltage below 0.15V or short to the ground will disable the device thus reduce the IC supply current consumption.

Typical Application

Figure 23. 85 to 265V Wide Range Input 90W PFC Demo Board Electrical Schematic Circuit

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Data Sheet

HIGH PERFORMANCE POWER FACTOR CORRECTOR AP1662

Mechanical Dimensions

SOIC-8 Unit: mm(inch)

4.700(0.185)

5.100(0.201)

7

°

7

°

1.270(0.050) TYP

0.100(0.004)

0.300(0.012)

1.350(0.053)

1.750(0.069)

0.675(0.027)

0.725(0.029)

D

2

D

1

:

0

0.320(0.013)

5.800(0.228)

6.200(0.244)

0.800(0.031)

°

8

°

8

0.200(0.008)

0

°

8

°

1° 5°

0.450(0.017)

0.800(0.031)

)

6

0

.

0

(

0

5

1

.

0

R

1.000(0.039)

0.330(0.013)

0.510(0.020)

R0.150(0.006)

3.800(0.150)

4.000(0.157)

0.190(0.007)

0.250(0.010)

0.900(0.035)

Note: Eject hole, oriented hole and mold mark is optional.

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Data Sheet

HIGH PERFORMANCE POWER FACTOR CORRECTOR AP1662

Mechanical Dimensions (Continued)

DIP-8 Unit: mm(inch)

0.700(0.028)

°

6

1.524(0.060) TYP

7.620(0.300)TYP

°

6

5°

3.710(0.146)

4.310(0.170)

3.000(0.118)

3.600(0.142)

0.254(0.010)TYP

R0.750(0.030)

Φ3.000(0.118)

Depth

0.100(0.004)

0.200(0.008)

4

°

0.360(0.014)

0.560(0.022)

0.130(0.005)MIN

9.000(0.354)

9.400(0.370)

3.200(0.126)

3.600(0.142)

0.510(0.020)MIN

2.540(0.100) TYP

6.200(0.244)

6.600(0.260)

4

0.204(0.008)

0.360(0.014)

8.200(0.323)

9.400(0.370)

Note: Eject hole, oriented hole and mold mark is optional.

Jul. 2012 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

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BCD Semiconductor Manufacturing Limited

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particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use

of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or

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