FAN6755 View Datasheet(PDF) - Fairchild Semiconductor

Part Name

Description

Manufacturer

FAN6755

Highly Integrated Green-Mode PWM Controller

Fairchild Semiconductor 

Electrical Characteristics

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

Symbol

Parameter

Feedback Input Section

AV

Input Voltage to Current-Sense

Attenuation

ZFB

VFB-OPEN

VFB-OLP

tD-OLP

Input Impedance

Output High Voltage

FB Open-Loop Trigger Level

Delay Time of FB Pin Open-loop

Protection

VFB-N Green-Mode Entry FB Voltage

VFB-G

VFB-ZDCR

Green-Mode Ending FB Voltage

FB Threshold Voltage for Zero-Duty

Recovery

VFB-ZDC FB Threshold Voltage for Zero-Duty

VFB-ZDCR -

VFB-ZDC

ZDC Hysterisis

Conditions

VFB =4V

FB Pin Open

Min. Typ.

Max. Units

1/4.5

1/4.0

1/3.5

V/V

11

15

5.1

5.3

4.4

4.6

18

kΩ

5.5

V

4.8

V

45.0

62.5

70.0

ms

2.8

3.0

3.2

V

VFB-N - 0.6

V

1.6

1.8

2.0

V

1.4

1.6

1.8

V

0.12

0.15

0.19

V

PWM Frequency

fOSC

fOSC-G

VFB-ZDC VFB-ZDCR VFB-G

Figure 7.

VFB-N

VFB

VFB vs. PWM Frequency

Continued on the following page…

© 2009 Fairchild Semiconductor Corporation

FAN6755 • Rev. 1.0.1

7

www.fairchildsemi.com

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