FAN6863W datasheet(5/16 Pages) FAIRCHILD

Part #	FAN6863W

Description	Highly Integrated Green-Mode PWM Controller

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Manufacturer	FAIRCHILD [Fairchild Semiconductor]

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FAN6863W • Rev. 1.0.1

5

Electrical Characteristics

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

Symbol

Parameter

Condition

Min.

Typ.

Max.

Unit

VDD Section

VDD-OP

Continuously Operating Voltage

20

V

VDD-ON

Turn-On Threshold Voltage

15

16

17

V

VDD-OFF

Turn-Off Voltage

6.5

7.0

7.5

V

VDD-LH

Threshold Voltage for Latch-Off Release

4

V

IDD-ST

Startup Current

VDD-ON – 0.16V

8

15

µA

IDD-OP1

Operating Supply Current in PWM Operation

VDD = 20V,

VFB = 3V Gate Open

2

mA

IDD-OP2

Operating Supply Current when VFB < VFB-ZDC

VDD = 15V,

VFB < VFB-ZDC

600

µA

VDD-OVP

VDD Over-Voltage Protection

FAN6863WL-Latch,

FAN6863WR-Auto

Restart

21.2

22.2

23.2

V

tD-VDDOVP

VDD OVP Debounce Time

50

µs

IDD-LH

Latch-Off Holding Current

VDD = 5V;

FAN6863W,

FAN6863WL Only

70

80

µA

Feedback Input Section

AV

Input-Voltage to Current-Sense Attenuation

1/4.0

1/3.5

1/3.0

V/V

ZFB

Input Impedance

17

kΩ

VFB-OPEN

FB Pin Open Voltage

5.2

5.4

5.6

V

VFB-OLP

Threshold Voltage for Open-Loop Protection

4.3

4.6

4.9

V

tD-OLP

Open-Loop Protection Delay

VFB > VFB-OLP,

tON > 2.5µs,

TA = -40 to +105°C

54

60

66

ms

tD-SCP

Secondary Short-Circuit Protection Delay

FB > VFB-OLP,

tON < 2.5µs,

TA = -40 to +105°C

6

7

8

ms

tON-SCP

Short-Circuit Protection On-Time Detection

VFB>VFB-OLP,

TA = -40 to +105°C

2.5

µs

Current Sense Section

tPD

Delay to Output

100

250

ns

tLEB

Leading-Edge Blanking Time

200

250

ns

VLIMIT-H

HIGH Threshold Voltage for Current Limit

Duty>55%

0.57

0.60

0.63

V

VLIMIT-L

LOW Threshold Voltage for Current Limit

Duty = 0%

0.36

0.39

0.42

V

tSOFT-START Period During Startup Time

Startup Time

4.75

5.00

10.00

ms

VSSCP

Threshold Voltage for SENSE Short-Circuit

Protection

tON > 4.5µs,

FB < VFB-OLP,

TA = -40 to +105°C

110

mV

tON-SSCP

Detect SENSE On Time for SENSE Short-

Circuit Protection

4.4

µs

tSSCP

Debounce Time for SENSE Short-Circuit

Protection

tON > 4.5µs,

VFB < VFB-OLP,

TA = -40 to +105°C

100

µs

Continued on the following page…

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