SG6846G Просмотр технического описания (PDF) - Fairchild Semiconductor
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SG6846G Datasheet PDF : 14 Pages
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Electrical Characteristics
VDD = 15V and TA = 25°C unless otherwise noted.
Symbol
Parameter
VDD Section
VDD-OP Continuously Operating Voltage
VDD-ON Turn-on Threshold Voltage
VDD-OFF Turn-off Voltage
VDD-LH Threshold Voltage for Latch-off Release
IDD-ST
Startup Current
IDD-OP
Operating Supply Current
VDD-OVP
tD-VDDOVP
VDD Over-Voltage Protection (Latch off)
VDD OVP Debounce Time
IDD-OVP VDD OVP Latch-up Holding Current
VIN Section
VIN-OFF PWM Turn-off Threshold Voltage
VIN-ON PWM Turn-on Threshold Voltage
Test Condition
VDD-ON – 0.16V
GATE Open
RI = 26kΩ
VDD = 5V
Feedback Input Section
AV
ZFB
VFBO
VFB-OLP
tD-OLP
Input Voltage to Current Sense Attenuation
Input Impedance
FB Pin Open Voltage
Threshold Voltage of Open-Loop Protection
Open-Loop Protection Delay Time
At Green Mode
RI = 26kΩ
Current Sense Section
ZSENSE
tPD
tLEB
VSLOPE
VSTH1V
VSTH3V
VSTH1V-1/2
VSTH3V-1/2
tD-OCP
tSS-65KHz
tSS-130KHz
Input Impedance
Delay to Output
Leading-Edge Blanking Time
Slope Compensation
Threshold Voltage for Current Limit
Threshold Voltage for Current Limit
OCP Threshold Voltage for Current Limit
OCP Threshold Voltage for Current Limit
Delay Time for Over-Current Protection
Period During Startup Time
Duty = DCYMAX
VIN = 1V
VIN = 3V
VIN = 1V
VIN = 3V
RI = 26kΩ
RI = 26kΩ
RI = 13kΩ
Min. Typ. Max. Unit
20
V
15.5 16.5 17.5 V
9.5 10.5 11.5 V
3
4
5
V
8
30 µA
3.7
5.0 mA
23
24
25
V
60
100 140 µs
30
50
70 µA
0.65 0.70 0.75 V
VIN-OFF VIN-OFF VIN-OFF
+0.18 +0.20 +0.22
V
1/3.5 1/4.0 1/4.5 V/V
4.0
5.5
7.0 kΩ
6.2
V
4.7
5.2
5.7
V
470 500 530 ms
12
kΩ
100 250 ns
270 360
ns
0.30 0.33 0.36 V
1.07 1.10 1.13 V
0.91 0.94 0.97 V
0.52 0.55 0.58 V
0.44 0.47 0.50 V
470 500 530 ms
4.5
5.0
5.5 ms
2.25 2.50 2.75 ms
Continued on following page…
© 2008 Fairchild Semiconductor Corporation
SG6846G • Rev. 1.0.2
5
www.fairchildsemi.com
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