FAN6921MLMY datasheet(8/23 Pages) FAIRCHILD

Part #	FAN6921MLMY

Description	Integrated Critical Mode PFC/Quasi-Resonant Current Mode PWM Controller

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Manufacturer	FAIRCHILD [Fairchild Semiconductor]

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FAN6921ML • Rev. 1.0.1

8

Electrical Characteristics (Continued)

VDD=15V, TA=-40~105°C (TA=TJ), unless otherwise specified.

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Units

PFC Stage

Voltage Error Amplifier Section

Gm

Transconductance

(4)

100

125

150

µmho

VREF

Feedback Comparator Reference Voltage

2.465

2.500

2.535

V

VINV-H

Clamp High Feedback Voltage

RANGE=Open

2.70

2.75

2.80

V

RANGE=Ground

2.60

2.65

2.70

V

VRATIO

Clamp High Output Voltage Ratio

VINVH / VREF,

RANGE=Open

1.06

1.14

VINVH / VREF,

RANGE=Ground

1.04

1.08

VINV-L

Clamp Low Feedback Voltage

2.25

2.30

2.35

V

VINV-OVP

Over Voltage Protection for INV

Input

RANGE=Open

2.90

2.95

V

RANGE=Ground

2.75

2.80

V

tINV-OVP

Over-Voltage Protection Debounce Time

50

70

90

µs

VINV-UVP

Under-Voltage Protection for INV Input

0.35

0.45

0.55

V

tINV-UVP

Under Voltage Protection Debounce Time

50

70

90

µs

VINV-FB-Latch

INV Threshold Voltage for Blocking FB latch

0.7

0.8

0.9

V

VINV-BO

PWM and PFC Off Threshold for Brownout Protection

1.15

1.20

1.25

V

VINV-BO2

PWM Off Threshold Voltage for Brownout Protection,

PFC Off

0.7

0.8

0.9

V

VCOMP

Comparator Output High Voltage

4.8

6.0

V

VOZ

Zero Duty Cycle Voltage on COMP Pin

1.15

1.25

1.35

V

ICOMP

Comparator Output Source

Current

VINV=2.3V, VCOMP=1.5

15

25

35

µA

VINV=1.5V

0.50

0.75

1.00

mA

Comparator Output Sink Current

RANGE=Open,

VINV=2.75V, VCOMP=5

20

30

40

µA

RANGE=Ground,

VINV=2.65V, VCOMP=5

20

30

40

µA

PFC Current Sense Section

VCSPFC

Threshold Voltage for Peak

Current Cycle-by-Cycle Limit

VCOMP=5V

0.60

V

tPD

Propagation Delay

110

200

ns

tBNK

Leading-Edge Blanking Time

110

180

250

ns

AV

CSPFC Compensation Ratio for THD

0.90

0.95

1.00

Continued on the following page…

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