SG3825CQ Просмотр технического описания (PDF) - Microsemi Corporation
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SG3825CQ Datasheet PDF : 7 Pages
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PRODUCT DATABOOK 1996/1997
SG1825C/SG2825C/SG3825C
HIGH-SPEED CURRENT-MODE PWM
NOT RECOMMENDED FOR NEW DESIGNS
E L E C T R I C A L C H A R A C T E R I S T I C S (Cont'd.)
Parameter
Symbol
Test Conditions
Error Amplifier Section (Note 6)
Input Offset Voltage
Input Bias Current
Input Offset Current
DC Open Loop Gain
Common Mode Rejection
Power Supply Rejection
Output Sink Current
Output Source Current
Output High Voltage
Output Low Voltage
Unity Gain Bandwidth (Note 3)
Slew Rate (Note 3)
AVOL
RS ≤ 2KΩ, VERROR = 2.5V
VERROR = 2.5V
VERROR = 2.5V
VERROR = 1 to 4V
Over Rated Voltage Range, VERROR = 2.5V
VIN = 10V to 30V, VERROR = 2.5V
VERROR = 1V
VERROR = 4V
IERROR = -0.5mA
IERROR = 1mA
AVOL = 0dB
PWM Comparator Section (Note 5 & 7)
Ramp Input Bias Current
Minimum Duty Cycle
Maximum Duty Cycle (Note 8)
Zero Duty Cycle Threshold
VERROR = 1V
VERROR = 4V
Delay to Driver Output (Note 3)
Softstart Section
VRAMP = 0V to 2V, VERROR= 2V
CSS Charge Current
VSOFTSTART = 0.5V
CSS Discharge Current
VSOFTSTART = 1.0V
Current Limit / Shutdown Section (Note 9)
ILIM Input Bias Current
Current Limit Threshold
Shutdown Threshold
Delay to Driver Output (Note 3)
Output Drivers Section (each output)
VSHUTDOWN = 0V to 1.2V
Output Low Level
Output High Level
VC Standby Current
Output Rise / Fall Time (Note 3)
Undervoltage Lockout Section
ISINK = 20mA
ISINK = 200mA
ISOURCE = 20mA
ISOURCE = 200mA
VC = 30V
CL = 1000pF
Start Threshold Voltage
UV Lockout Hysteresis
Supply Current Section (Note 5)
Start Up Current
Operating Current
VIN = 8V
VINV, VRAMP, V(ILIM/S.D.) = 0V, VN.I. = 1V
Note 5. FOSC = 400kHz (RT = 3.65kΩ, CT = 1.0nF).
Note 6. VCM = 1.5V to 5.5V.
Note 7. VRAMP = 0V, unless otherwise specified.
Note 8. 100% duty cycle is defined as a pulsewidth equal to one oscillator period.
Note 9. V(ILIM/S.D.) = 0V to 4.0V, unless otherwise specified.
SG1825C/2825C
Min. Typ. Max.
SG3825C
Min. Typ. Max.
Units
15
15
0.6 3
0.6 3
0.1 1
0.1 1
60 95
60 95
75 95
75 95
85 110
85 110
1 2.5
1 2.5
-0.5 -1.3
-0.5 -1.3
4.0 4.7 5.0 4.0 4.7 5.0
0 0.5 1.0 0 0.5 1.0
3 5.5
3 5.5
6
6
mV
µA
µA
dB
dB
dB
mA
mA
V
V
MHz
V/µsec
-1 -5
-1 -5
µA
0
0
%
85
85
%
1.1 1.25
1.1 1.25
V
50 80
50 80
ns
3 9 20 3 9 20 µA
1
1
mA
±15
±10 µA
0.9 1.0 1.1 0.9 1.0 1.1
V
1.25 1.40 1.55 1.20 1.40 1.55 V
50 80
50 80
ns
0.25 0.40
0.25 0.40 V
1.2 2.0
1.2 2.0
V
13.0 13.5
13.0 13.5
V
12.0 13.0
12.0 13.0
V
150 500
150 500 µA
30 60
30 60
ns
8.8 9.2 9.7 8.8 9.2 9.7
V
0.4 0.8 1.2 0.4 0.8 1.2
V
0.5 1.2
22 33
0.5 1.2 mA
22 33 mA
4
Copyright © 1994
Rev. 1.3a
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