FAN6920MRMY datasheet(10/24 Pages) FAIRCHILD

部品番号	FAN6920MRMY

部品情報	Integrated Critical-Mode PFC and Quasi-Resonant Current-Mode PWM Controller

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メーカー	FAIRCHILD [Fairchild Semiconductor]

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FAN6920MR • Rev. 1.0.3

10

Electrical Characteristics (Continued)

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

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Units

PWM STAGE

Feedback Input Section

AV

Input-Voltage to Current Sense

Attenuation

(4)

AV = VCS /VFB ,

0 < VCS < 0.9

1/2.75

1/3.00

1/3.25

V/V

ZFB

Input Impedance

(4)

VFB > VG

3

5

7

kΩ

IOZ

Bias Current

VFB = 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

The Debounce Time for Open-

Loop Protection

40

50

60

ms

tFB-SS

Internal Soft-Start Time

(4)

VFB = 0V~3.6V

4

5

6

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 (Auto-Recovery)

Debounce Time

100

150

200

µs

IDET-SOURCE

Maximum Source Current

VDET = 0V

1

mA

VDET-LOW

Lower Clamp Voltage

IDET = 1mA

0.15

0.25

0.35

V

tVALLEY-DELAY

Delay Time 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)

2.5

µs

tTIME-OUT

Time-Out After tOFF-MIN

(4)

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

5

µs

VFB = VG

20.5

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

(4)

0.1

V

Continued on the following page…

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