SG6203 Datasheet, PDF (5/13 Pages) Fairchild Semiconductor – Synchronous Rectifier Controller for Flyback Converter

Synchronous Rectifier Controller for Flyback Converter
Synchronous Detection Section
Symbol Parameter
Test Condition
VTH
Threshold Voltage to Enable One-shot Signal
VTL
Threshold Voltage to Enable Output
IN+ - IN- > 5mV
IDET
Current Output from DET Pin
RT=24KΩ
TD_LOW
Debounce Time from DET Low to Enable Output
Product Specification
SG6203
Min.
1.9
1.2
150
Typ.
2.1
1.4
250
Max.
2.3
1.6
300
300
Unit
V
V
µA
ns
Current Detection Section
Symbol Parameter
VOFFSET
Offset Voltage
IIN+
Current Output from IN+
Test Condition
RT=24KΩ
Min.
90
IIN-
Current Output from IN-
RT=24KΩ
90
IIN+ - IIN-
TP
PSRR
CMRR
CMRR-f
Differential Current of IN+ and IN-
Propagation Delay (OUTPUT from Low to High)
Power Supply Rejection Ratio
Common Mode Rejection Ratio
Common Mode Rejection Ratio at 70KHz
12KΩ < RT < 36KΩ
DET< VTL, IN+ - IN- > 5mV
Typ.
100
100
65
65
32
Max.
10
110
110
1.5
200
Unit
mV
µA
µA
µA
ns
dB
dB
dB
Zener Section
Symbol Parameter
VZ
Zener Voltage
Test Condition
IVZ=0.1 ~ 3mA
Min.
18
Typ.
19
Max. Unit
20
V
Output Section
Symbol Parameter
VOH
Output Voltage High
VOL
Output Voltage Low
Tr
Rising Time
Tf
Falling Time
Test Condition
VCC=12V, ISOURCE=50mA
VCC=6V, ISOURCE=30mA
VCC=12V, ISINK=50mA
VCC=6V, ISINK=30mA
TA=25°C; CL=5nF,
VCC=12V
TA=25°C; CL=5nF,
VCC=12V
Min.
11.2
3.5
Typ.
150
150
Max.
1
1.2
175
Unit
V
V
V
V
ns
175
ns
V_CC Section
Symbol Parameter
VOP
Continuously Operating Voltage
ICC_OP
Operating Current
VTH(ON)
VTH(OFF)
Start Threshold
Minimum Operating Voltage
Test Condition
Min.
VDD=12V, Output=open,
DET=50KHz,
IN-=IN+=open, RT=12KΩ
4.8
Typ.
1.7
6.0
5.1
Max. Unit
20
V
4.0
mA
6.3
V
V
© System General Corp.
Version 1.0.1 (IAO33.0010.B1)
-5-
www.sg.com.tw • www.fairchildsemi.com
September 24, 2007