FAN6754BMRMY datasheet(10/24 Pages) FAIRCHILD

Teilenummer	FAN6754BMRMY

Bauteilbeschribung	Integrated Critical-Mode PFC and Quasi-Resonant

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Hersteller	FAIRCHILD [Fairchild Semiconductor]

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FAN6921AMR

• Rev. 1.0.2

10

Electrical Characteristics (Continued)

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

Symbol

Parameter

Condition

Min.

Typ.

Max.

Unit

PWM STAGE

Feedback Input Section

AV

Input-Voltage to Current-Sense

Attenuation

(4)

AV=△VCSPWM /△VFB,

0<VCSPWM<0.9

1/2.75

1/3.00

1/3.25

V/V

ZFB

Input Impedance

(4)

FB>VG

3

5

7

k

Ω

IOZ

Bias Current

FB=VOZ

1.2

2.0

mA

VOZ

Zero Duty-Cycle Input Voltage

0.7

0.9

1.1

V

VFB-OLP

Open-Loop Protection Threshold

Voltage

3.9

4.2

4.5

V

tFB-OLP

Debounce Time for Open-Loop

Protection

40

50

60

ms

tFB-SS

Internal Soft-Start Time

(4)

VFB=0 V~3.6 V

8.5

9.5

10.5

ms

DET Pin OVP and Valley Detection Section

VDET-OVP

Comparator Reference Voltage

2.45

2.50

2.55

V

Av

Open-Loop Gain

(4)

60

dB

BW

Gain Bandwidth

(4)

1

MHz

tDET-OVP

Output OVP (Latched) Debounce

Time

100

150

200

µs

IDET-SOURCE

Maximum Source Current

VDET=0 V

1

mA

VDET-HIGH

Upper Clamp Voltage

IDET=-1 mA

5

V

VDET-LOW

Lower Clamp Voltage

IDET=1 mA

0.5

0.7

0.9

V

tVALLEY-DELAY

Delay from Valley Signal

Detected to Output Turn-on

(4)

150

200

250

ns

tOFF-BNK

Leading-Edge Blanking Time for

DET-OVP (2.5V) and Valley

Signal when PWM MOS Turns

Off

(4)

3

4

5

µs

tTIME-OUT

Time-Out After tOFF-MIN

8

9

10

µs

PWM Oscillator Section

tON-MAX-PWM

Maximum On Time

38

45

52

µs

tOFF-MIN

Minimum Off-Time

VFB≧VN, TA=25°C

7

8

9

µs

VFB=VG

32

37

42

VN

Beginning of Green-On Mode at

FB Voltage Level

1.95

2.10

2.25

V

VG

Beginning of Green-Off Mode at

FB Voltage Level

1.00

1.15

1.30

V

ΔVG

Hysteresis for Beginning of

Green-Off Mode at FB Voltage

Level

0.1

V

Continued on the following page…

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