參數(shù)資料
型號： L4964HT
廠商： 意法半導(dǎo)體
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： Isolated Flyback Switching Regulator with 9V Output
中文描述： 隔離反激式開關(guān)穩(wěn)壓9V輸出
文件頁數(shù)： 5/13頁
文件大小： 208K
代理商： L4964HT
ELECTRICAL CHARACTERISTICS
(refer to the test circuits T
j
= 25
o
C, V
i
= 25V, unless otherwise specified)
Symbol
DYNAMIC CHARACTERISTICS (pin 6 to GND unless otherwise specified)
V
o
Output Voltage Range
V
i
Input Voltage Range
V
o
Line Regulation
V
o
Load Regulation
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
Fig.
V
i
= 36V, I
o
= 1A
V
o
= V
ref
to 28V, I
o
= 3A
V
i
= 10V to 30V, V
o
= V
ref
, I
o
= 2A
I
o
= 1A to 2A
I
o
= 0.5A to 3A, V
o
= V
ref
V
ref
9
28
36
70
30
50
5.25
V
V
4
4
4
4
4
4
15
10
15
5.1
0.4
mV
mV
mV
V
mV/
°
C
V
ref
V
ref
T
V
d
Internal Reference Voltage (Pin 10) V
i
= 9V to 36V, I
o
= 2A
Average Temperature Coefficient
of Reference Voltage
4.95
T
j
= 0
°
C to 125
°
C, I
o
= 2A
Dropout Voltage between Pin 2
and Pin 3
Maximum Operating Load Current
Current Limiting Threshold (Pin 2)
Input Average Current
Efficiency
I
o
= 3A
I
o
= 2A
V
I
= 9V to 36V, V
o
= V
ref
to 28V
V
i
= 9V to 36V, V
o
= V
re
f to 28V
V
i
= 36V, Output Short-circuited
I
o
= 3A
2
1.5
3.2
2.4
V
V
A
A
4
4
4
4
4
4
4
4
Io
m
I
2L
I
SH
η
4
4.5
8
80
75
85
56
140
mA
%
%
dB
V
o
= V
V
o
= 12V
SVR
Supply Voltage Ripple Rejection
V
I
= 2V
rms
, f
ripple
= 100Hz
V
o
= V
ref
, I
o
= 2A
46
–
f
Switching Frequency
Voltage Stability of Switching
Frequency
40
50
0.5
60
kHz
%
4
4
f
V
i
f
T
j
f
max
V
i
= 9V to 36V
Temperature Stability of Switching
Frequency
T
j
= 0
°
C to 125
°
C
1
%
4
Maximum Operating Switching
Frequency
Thermal Shutdown Junction
Temperature
DC CHARACTERISTICS
V
o
= V
ref
, I
o
= 1A
120
kHz
–
T
sd
135
145
°
C
–
I
3Q
Quiescent Drain Current
V
i
= 36V, V
7
= 0V, S1 : B, S2 : B
V
6
= 0V
V
6
= 3V
V
= 36V, V
= 3 V, V
7
= 0V
S1 : B, S2 : A
66
30
100
50
2
mA
6a
–I
2L
Output Leakage Current
mA
6a
SOFT START
I
5so
I
5si
INHIBIT
V
6L
V
6H
Source Current
Sink Current
V
6
= 0V, V
5
= 3V
V
6
= 3V, V
5
= 3V
80
40
130
70
180
140
μ
A
μ
A
6b
6b
Low Input Voltage
High Input Voltage
Input Current with Input Voltage
V
= 9V to 36V, V
7
= 0V
S1 : B, S2 : B
- 0.3
2
0.8
5.5
V
V
μ
A
6a
6a
6a
– I
6L
–I
6H
Low Level
High Level
V
= 9V to 36V, V
7
= 0V
S1 : B, S2 : B
V
6
= 0.8V
V
6
= 2V
20
10
ERROR AMPLIFIER
V
9H
High Level Output Voltage
V
= 4.7V, I
9
= 100
μ
A, S1 : A,
S2 : A
V
10
= 5.3V, I
9
= 100
μ
A, S1 : A,
S2 : E
V
10
= 5.3V, S1 : A, S2 : B
V
10
= 4.7V, S1 : A, S2 : D
3.4
V
6c
V
9L
Low Level Output Voltage
0.6
V
6c
I
9 si
–I
9 so
Sink Output Current
Source Output Current
100
100
150
150
μ
A
μ
A
6c
6c
L4964
5/13
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