SG6846 Ver la hoja de datos (PDF) - Unspecified
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SG6846 Datasheet PDF : 14 Pages
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Highly-Integrated Green-Mode PWM Controller
Current Sense Section
Symbol
Parameter
ZCS
Input Impedance
TPD
Delay to Output
BNK
Leading Edge Blanking Time
VTH-P @VIN=1V Threshold Voltage for Current Limit
VTH-P @VIN=3V Threshold Voltage for Current Limit
VTH-O @VIN=1V 2/3 Threshold Voltage for Current Limit
VTH-O @VIN=3V 2/3 Threshold Voltage for Current Limit
TDELAY-OCP
The Delay Time for Over-current Protection
Product Specification
SG6846
Test Condition
VIN = 1V, RI = 26kΩ
VIN =3V, RI = 26kΩ
VIN = 1V, RI = 26kΩ
VIN =3V, RI = 26kΩ
RI = 26KΩ
Min.
Typ.
12
100
360
0.83
0.70
0.61
0.51
96
Max.
200
Unit
kΩ
nsec
nsec
V
V
V
V
msec
Oscillator Section
Symbol
Parameter
Test Condition
FOSC
PWM Frequency
RI = 26kΩ
FOSC-GREEN
Green-mode Frequency
RI = 26kΩ
FB Pin Threshold for the Beginning of Green
VN
Mode
VG
Green-OFF Mode Voltage at FB pin
SG
Slope for Green-Mode Modulation
RI = 26kΩ
FDV
Frequency Variation Versus VDD Deviation
VDD = 11.5V to 20V
FDT
Frequency Variation Versus Temp. Deviation
TA = -30 to 85 ℃
Min.
60
20
Typ.
65
22.5
2.1
1.6
85
1.5
Max.
70
25
5
5
Unit
KHz
KHz
V
V
Hz/mV
%
%
FOSC: 65kHz
Frequenc
y
FOSC-GREEN: 22.5kHz
SG: 85Hz/mV
FOSC-GOFF: 0kHz
VG: 1.6V
VN: 2.1V
PWM Frequency
VF
B
© System General Corp.
-5-
Version 1.0(IAO33.0008.B0)
www.sg.com.tw
Sep. 30, 2004
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