SG6742 View Datasheet(PDF) - Fairchild Semiconductor
Part Name
Description
Manufacturer
SG6742 Datasheet PDF : 14 Pages
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Highly Integrated Green-Mode PWM Controller
Oscillator Section
Symbol Parameter
FOSC
Frequency in Nominal Mode
tHOP
FOSC-G
FDV
FDT
Hopping Period
Green-Mode Frequency
Frequency Variation vs. VDD Deviation
Frequency Variation vs. Temp. Deviation
* Hopping off at green-mode.
Test Condition
Center Frequency
Hopping Range
VDD=11V to 22V
TA=-20 to 85°C
Feedback Input Section
Symbol Parameter
AV
ZFB
VFB-OPEN
VFB-OLP
tD-OLP
VFB-N
VFB-G
Input Voltage to Current-Sense Attenuation
Input Impedance
Output High Voltage
FB Open-Loop Trigger Level
Delay Time of FB Pin Open Loop Protection
Green-Mode Entry FB Voltage
Green-Mode Ending FB Voltage
Test Condition
FB pin open
Product Specification
SG6742
Min.
62
±3.7
18
Typ.
65
±4.2
4.4
22
Max.
68
±4.7
25
5
5
Unit
KHz
ms
KHz
%
%
Min.
1/4.5
4
5.5
5.0
53
1.9
Typ.
1/4.0
Max.
1/3.5
7
5.2
5.4
56
59
2.1
2.3
VFB-N-0.5
Unit
V/V
kΩ
V
V
ms
V
V
PWM Frequency
FOSC
FOSC-G
VFB-G
VFB-N
VFB
© System General Corp.
Version 1.0.1 (IAO33.0083.B0)
-5-
www.sg.com.tw • www.fairchildsemi.com
September 24, 2007
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