L4975 查看數據表（PDF） - STMicroelectronics
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L4975 Datasheet PDF : 21 Pages
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L4975A
ELECTRICAL CHARACTERISTICS (continued)
DC CHARACTERISTICS
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit Fig.
V9o n
Turn-on Threshold
10
11
12
V
7A
V9 Hyst Turn-off Hysteresys
1
V
7A
I9 Q
Quiescent Current
V12 = 0; S1 = D
13
19
mA
7A
I9OQ
Operating Supply Current V12 = 0; S1 = C; S2 = B
16
23
mA
7A
I7 L
Out Leak Current
Vi = 55V; S3 = A; V12 = 0
2
mA
7A
SOFT START
Symbol
I1 2
V12
Parameter
Soft Start Source Current
Output Saturation Voltage
ERROR AMPLIFIER
Test Condition
V12 = 3V; V11 = 0V
I12 = 20mA; V9 = 10V
I12 = 200µA; V9 = 10V
Min. Typ. Max. Unit Fig.
70
100
130
µA
7B
1
V
7B
0.7
V
7B
Symbol
V10H
Parameter
High Level Out Voltage
V10 L
Low Level Out Voltage
I10 H
Source Output Current
I10L
Sink Output Current
I1 1
GV
SVR
Input Bias Current
DC Open Loop Gain
Supply Voltage Rejection
VOS
Input Offset Voltage
RAMP GENERATOR (pin 2)
Test Condition
I10 = -100µA; S1 = C
V11 = 4.7V
I10 = +100µA; S1 = C
V11 = 5.3V;
V10 = 1V; S1 = E
V11 = 4.7V
V10 = 6V; S1 = D
V11 = 5.3V
RS = 10KΩ
VVCM = 4V;
RS = 10Ω
15 < Vi < 50V;
RS = 10Ω
RS = 50Ω
Min. Typ. Max. Unit Fig.
6
V
7C
1.2
V
7C
100
150
µA
7C
100
150
µA
7C
0.4
3
µA
–
60
dB
–
60
80
dB
–
2
10
mV
–
Symbol
V2
V2
Parameter
Ramp Valley
Ramp Peak
I2
Min. Ramp Current
I2
Max. Ramp Current
SYNC FUNCTION (pin 13)
Test Condition
Min. Typ. Max. Unit Fig.
S1 = C; S2 = B
1.2
1.5
V
7A
S1 = C
Vi = 15V
2.5
S2 = B
Vi = 45V
5.5
V
7A
V
7A
S1 = A; I1 = 100µA
270
300
µA
7A
S1 = A; I1 = 1mA
2.4
2.7
mA
7A
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit Fig.
V13
Low Input Voltage
Vi = 15V to 50V; V12 = 0;
S1 = C; S2 = B; S4 = B
–0.3
0.9
V
7A
V13
High Input voltage
V12 = 0;
3.5
S1 = C; S2 = B; S4 = B
5.5
V
7A
I13L
Sync Input Current with
V2 = V13 = 0.9V; S4 = A;
Low Input Voltage
S1 = C; S2 = B
0.4
mA
7A
I13 H
Input Current with High
V13 = 3.5V; S4 = A;
Input Voltage
S1 = C; S2 = B
2
mA
7A
V13
Output Amplitude
tW
Output Pulse Width
Vthr = 2.5V
4
5
V
–
0.3
0.5
0.8
µs
–
7/21
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