SGP100 datasheet(5/14 Pages) FAIRCHILD

Part #	SGP100

Description	Primary-side-control PWM Controller

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Manufacturer	FAIRCHILD [Fairchild Semiconductor]

Direct Link	http://www.fairchildsemi.com

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Product Specification

Primary-side-control PWM Controller

SGP100

- 5 -

www.sg.com.tw • www.fairchildsemi.com

Version 1.1.1 (IAO33.0042.B1)

September 26, 2007

Voltage-Sense Section

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

TRATIO

Proportion of TON and TDIS for Brownout

Protection*

TON /TDIS

1.5

ITC-25

CV Temperature Compensation Current

9

10

11

µA

* Guaranteed by design.

Current-Sense Section

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

ZCS

Filter Resistance

2

kΩ

TPD

Propagation Delay to GATE Output

150

200

ns

TLEB

Leading-Edge Blanking Time

TMIN-N-TPD

825

1025

1225

ns

TMIN-N

Minimum On-time at No Load

1075

1200

1350

ns

VSLOPE

Slope Compensation*

0.37

0.40

0.43

V

DSAW

Duty Cycle of SAW Limiter*

35

40

45

%

VTH-VA

Valley Threshold Voltage for Current Limit

VTH-FT - 0.4 VTH-FT - 0.25 VTH-FT - 0.1 V

VTH-FT

Flat threshold Voltage for Current Limit

1.2

1.3

1.5

V

* Guaranteed by design.

TH VA

V −

TH FT

V −

MAX

DCY

40%

Saw Limiter

Voltage Error Amplifier Section

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

VVR

Reference Voltage

2.475

2.500

2.525

V

VN

Green-Mode Starting Voltage

FS=FOSC-2KHz

1.55

1.70

1.85

V

VG

Green-Mode Ending Voltage

FS=1KHz

0.55

0.90

V

SG

Green-Mode Frequency Decreasing Rate

SG=(FOSC-3KHz)/(VN-VG)

25

35

45

Hz/mV

IV-SINK

Output Sink Current

VVS=3V, VCOMV=2.5V

85

100

115

µA

IV-SOURCE

Output Source Current

VVS=2V, VCOMV=2.5V

85

100

115

µA

VV-HIGH

Output High Voltage

VVS=2.3V

4.5

V

Current Error Amplifier Section

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

VIR

Reference Voltage

2.475

2.500

2.525

V

II-SINK

Output Sink Current

VCS=3V, VCOMI=2.5V

40

60

80

µA

II-SOURCE

Output Source Current

VCS=0.5V, VCOMI=2.5V

40

60

80

µA

VI-HIGH

Output High Voltage

VCS=0.5V

4.5

V

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