FAN6747 View Datasheet(PDF) - Fairchild Semiconductor

Part Name

Description

Manufacturer

FAN6747

Highly Integrated Green-Mode PWM Controller

Fairchild Semiconductor 

Electrical Characteristics

VDD=15V and TA=25°C, unless otherwise specified.

Symbol

VOZ-ON

VFB-ZDC

(VOZ-OFF)

VOZ-ON

-VOZ-OFF

fDV

fDT

Parameter

FB Threshold Voltage for Zero-

Duty Recovery

FB Threshold Voltage for Zero-

Duty

FB Voltage Hysteresis for VOZ-ON

to VOZ-OFF

Frequency Variation vs. VDD

Deviation

Frequency Variation vs.

Temperature Deviation

Conditions

VDD=12V to 22V

TA=-40 to 105°C

Min.

1.6

1.5

50

Typ.

1.8

1.7

100

Max.

2.0

1.9

150

5

5

Units

V

V

mV

%

%

Figure 10. PWM Frequency

Figure 11. Burst-Mode Diagram

Feedback Input Section

AV

Input-Voltage to Current-Sense

Attenuation

VFB < VFB-G

ZFB

Input Impedance

VFBO

VFB-OLP

FB Pin Open Voltage

FB Open-Loop Protection

Threshold Voltage

tD-OLP

Open-Loop Protection Debounce

1/4.5

1/4.0

1/3.5

V/V

13.4

15.5

17.6

kΩ

4.8

5.0

5.2

V

4.3

4.6

4.9

V

190

215

240

ms

© 2010 Fairchild Semiconductor Corporation

FAN6747 • Rev. 1.0.3

8

www.fairchildsemi.com

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