FAN6921ML datasheet(10/23 Pages) FAIRCHILD

Numer części	FAN6921ML

Szczegółowy opis	Integrated Critical Mode PFC/Quasi-Resonant Current Mode PWM Controller

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Producent	FAIRCHILD [Fairchild Semiconductor]

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FAN6921ML • Rev. 1.0.1

10

Electrical Characteristics (Continued)

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

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Units

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=0V

1

mA

VDET-HIGH

Upper Clamp Voltage

IDET=-1mA

5

V

VDET-LOW

Lower Clamp Voltage

IDET=1mA

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

7

8

9

µs

VFB=VG

32

37

42

µs

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

VCTL-PFC-OFF

Threshold Voltage on FB to

Disable PFC

RANGE Pin Internally

Open

1.70

1.75

1.80

V

Threshold Voltage on FB to

Disable PFC

RANGE Pin Internally

Ground

1.65

1.70

1.75

VCTL-PFC-ON

Hysteresis Voltage on FB to

Enable PFC

RANGE Pin Internally

Open

1.95

2.00

2.05

V

Hysteresis Voltage on FB to

Enable PFC

RANGE Pin Internally

Ground

1.75

1.80

1.85

tPFC-OFF

PFC OFF Debounce Time to

Disable PFC

PFC Status from ON

to OFF

400

500

600

ms

tINHIB-PFC-OFF Inhibit Time During tPFC-OFF

tPFC-OFF

30

34

38

µs

tPFC-ON

PFC ON Debounce Time to

Enable PFC

(4)

PFC Status from OFF

to ON

150

µs

tSTARTER-PWM Start Timer (Time-Out Timer)

VFB < VG

2.0

2.5

3.0

ms

VFB > VFB-OLP

25.5

32.5

39.5

µs

Continued on the following page…

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