SG6846A Просмотр технического описания (PDF) - Fairchild Semiconductor
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SG6846A Datasheet PDF : 15 Pages
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Electrical Characteristics
VDD = 15V and TA = 25°C unless otherwise noted.
Symbol
Parameter
Test Condition
VDD Section
VDD-OP Continuously Operating Voltage
VDD-ON Turn-on Threshold Voltage
VDD-OFF Turn-off Voltage
VDD-SCP
Threshold voltage on VDD for Short-Circuit
Protection
VDD-LH Threshold Voltage for Latch-off Release
IDD-ST
Startup Current
VDD-ON – 0.16V
IDD-OP
Operating Supply Current
GATE Open
VDD-OVP VDD Over-Voltage Protection (Latch off)
tD-VDDOVP VDD OVP Debounce Time
RI = 26kΩ
IDD-OVP VDD OVP Latch-off Holding Current
VDD = 5V
VIN Section
VIN-OFF PWM Turn-off Threshold Voltage
VIN-ON PWM Turn-on Threshold Voltage
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
RI = 26kΩ
Current Sense Section
ZSENSE
tPD
tLEB
VSLOPE
VSTH1V
VSTH3V
VSTH1V-2/3
VSTH3V-2/3
tD-OCP
tD-SCP
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
Delay Time for Output Short-Circuited
Protection
Period During Startup Time
Duty = DCYMAX
VIN = 1V
VIN = 3V
VIN = 1V
VIN = 3V
RI = 26kΩ
RI = 26kΩ;
VDD<VDD-SCP
RI = 26kΩ
RI = 13kΩ
Min. Typ. Max. Unit
20
V
15.5 16.5 17.5 V
9.5 10.5 11.5 V
VDD-OFF VDD-OFF VDD-OFF
+0.5V +1.0V +1.5V
V
3
4
5
V
8
30 µA
3.7
5.0 mA
22.6 23.6 24.6 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
5.2
6.2
6.6
V
4.7
5.2
5.7
V
1600 1700 1800 ms
12
kΩ
100 250 ns
270 360
ns
0.30 0.33 0.36 V
0.80 0.83 0.86 V
0.67 0.70 0.73 V
0.58 0.61 0.64 V
0.48 0.51 0.54 V
1600 1700 1800 ms
90
100 110 ms
4.5
5.0
5.5 ms
2.25 2.50 2.75 ms
© 2008 Fairchild Semiconductor Corporation
SG6846A • Rev. 1.1.4
Continued on following page…
www.fairchildsemi.com
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