SGP100 Datasheet, PDF (5/14 Pages) Fairchild Semiconductor – Primary-side-control PWM Controller

Primary-side-control PWM Controller
Voltage-Sense Section
Symbol Parameter
TRATIO
Proportion of TON and TDIS for Brownout
Protection*
ITC-25
CV Temperature Compensation Current
* Guaranteed by design.
Test Condition
TON /TDIS
Product Specification
SGP100
Min.
9
Typ.
1.5
10
Max. Unit
11
µA
Current-Sense Section
Symbol Parameter
ZCS
Filter Resistance
TPD
Propagation Delay to GATE Output
TLEB
Leading-Edge Blanking Time
TMIN-N
Minimum On-time at No Load
VSLOPE
Slope Compensation*
DSAW
Duty Cycle of SAW Limiter*
VTH-VA
Valley Threshold Voltage for Current Limit
VTH-FT
Flat threshold Voltage for Current Limit
* Guaranteed by design.
Test Condition
TMIN-N-TPD
Min.
Typ.
Max. Unit
2
kΩ
150
200
ns
825
1025
1225
ns
1075
1200
1350
ns
0.37
0.40
0.43
V
35
40
45
%
VTH-FT - 0.4 VTH-FT - 0.25 VTH-FT - 0.1 V
1.2
1.3
1.5
V
V_{TH −FT}
40%
V_{TH −VA}
DCY_MAX
Saw Limiter
Voltage Error Amplifier Section
Symbol Parameter
VVR
VN
VG
SG
IV-SINK
IV-SOURCE
VV-HIGH
Reference Voltage
Green-Mode Starting Voltage
Green-Mode Ending Voltage
Green-Mode Frequency Decreasing Rate
Output Sink Current
Output Source Current
Output High Voltage
Test Condition
FS=FOSC-2KHz
FS=1KHz
SG=(FOSC-3KHz)/(VN-VG)
VVS=3V, VCOMV=2.5V
VVS=2V, VCOMV=2.5V
VVS=2.3V
Min.
2.475
1.55
25
85
85
4.5
Typ.
2.500
1.70
0.55
35
100
100
Max.
2.525
1.85
0.90
45
115
115
Unit
V
V
V
Hz/mV
µA
µA
V
Current Error Amplifier Section
Symbol Parameter
VIR
II-SINK
II-SOURCE
VI-HIGH
Reference Voltage
Output Sink Current
Output Source Current
Output High Voltage
Test Condition
VCS=3V, VCOMI=2.5V
VCS=0.5V, VCOMI=2.5V
VCS=0.5V
Min.
2.475
40
40
4.5
Typ.
2.500
60
60
Max.
2.525
80
80
Unit
V
µA
µA
V
© System General Corp.
Version 1.1.1 (IAO33.0042.B1)
-5-
www.sg.com.tw • www.fairchildsemi.com
September 26, 2007