SG6846BCSZ Ver la hoja de datos (PDF) - Fairchild Semiconductor
Número de pieza
componentes Descripción
Fabricante
SG6846BCSZ Datasheet PDF : 15 Pages
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(1 ) normal
operation
(4)
VDD< 12 V ?
NO
YES
NO
(2)
IP > 2 /3 IPK ?
(3)
Timing = 8 ms
(5)
Timing = 200ms
(6 ) NO
YES VDD< = 12 V ?
SCP
OCP
(7 ) Gate-off
SCP
Figure 6. SG6846B OCP/SCP Logic Flow Diagram
Electrical Characteristics (Continued)
VDD = 15V and TA = 25°C unless otherwise noted.
Symbol
Parameter
Oscillator Section
Center
fOSC
Normal PWM Frequency Frequency
Jitter Range
fOSC,MAX
Maximum PWM
Frequency
Center
Frequency
Jitter Range
fOSC,MIN
Center
Minimum PWM Frequency Frequency
Jitter Range
thop-1
thop-3
fOSC-G
SG
VFB-N
VFB-G
fDV
fDT
Jitter Period
Jitter period
Green-Mode Minimum Frequency
Slope for Green-Mode Modulation
FB Pin Frequency Pin, FB voltage
Reduction Threshold Jitter Range
Pin, FB voltage
FB Voltage at fOSC-G
Jitter Range
Frequency Variation vs. VDD Deviation
Frequency Variation vs. Temperature
Deviation
Test Condition Min. Typ. Max. Unit
RI = 26kΩ, VFB>VN
62
65
68
kHz
±3.7 ±4.2 ±4.7
RI = 13kΩ, VFB>VN
124 130 136
kHz
±7.4 ±8.4 ±9.4
RI = 36kΩ, VFB>VN
RI = 26kΩ, VFB ≥ VN
RI = 26kΩ, VFB = VG
RI = 26kΩ
RI = 26kΩ
RI = 26kΩ, VFB = VN
RI = 26kΩ, VFB = VG
VDD = 11.5V to 20V
44.8
±2.54
3.9
10.2
18.0
1.9
3.7
1.4
1.27
47.0
±2.90
4.4
11.5
22.5
85
2.1
4.2
1.6
1.45
49.2
kHz
±3.26
4.9
ms
12.8 ms
25.0 kHz
Hz/mV
2.3
V
4.7 KHz
1.8
V
1.62 KHz
5
%
TA = -30 to 85°C
1.5
5.0
%
Continued on following page…
© 2008 Fairchild Semiconductor Corporation
SG6846B • Rev. 1.3.3
7
www.fairchildsemi.com
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