FAN6751MR 查看數據表（PDF） - Fairchild Semiconductor

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FAN6751MR

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 Green-Mode Ending FB Voltage

VFB-ZDC Zero Duty-Cycle Input Voltage

Current-Sense Section

ZSENSE

VTH-P at

VIN=1V

VTH-P at

VIN=3V

tPD

tLEB

VS-SCP

Input Impedance

Threshold Voltage for Current Limit

Threshold Voltage for Current Limit

Delay to Output

Leading-Edge Blanking Time

Threshold Voltage for SENSE Short-

Circuit Protection

tD-SSCP

Delay Time for SENSE Short-Circuit

Protection

TSS Period During Soft-Startup Time

Conditions

FB Pin Open

VIN=1V

VIN=3V

VSENSE<0.15V

Startup Time

Min. Typ. Max. Units

1/4.5

1/4.0

1/3.5

V/V

4

7

kΩ

5.5

V

5.0

5.2

5.4

V

56

ms

2.1

V

1.6

V

1.1

V

12

KΩ

0.80

0.83

0.86

V

0.67

0.70

0.73

V

100

200

ns

230

280

330

ns

0.10

0.15

0.20

V

100

150

200

µs

4.5

5.0

5.5

ms

PWM Frequency

fOSC

fOSC-G

VFB-ZDC VFB-G

VFB-N

VFB

Figure 5. VFB vs. PWM Frequency

© 2008 Fairchild Semiconductor Corporation

FAN6751MR • Rev. 1.0.0

6

www.fairchildsemi.com

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