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參數(shù)資料
| 型號： | TEA2018A |
| 廠商： | 意法半導體 |
| 英文描述： | CURRENT MODE SWITCHING POWER SUPPLY CONTROL CIRCUIT |
| 中文描述： | 電流模式開關(guān)電源控制電路 |
| 文件頁數(shù)： | 3/7頁 |
| 文件大?。?/td> | 77K |
| 代理商： | TEA2018A |
ELECTRICAL OPERATINGCHARACTERISTICS
T
amb
= 25
o
C, potentials referenced to ground (unless otherwise specified)(see test circuit)
Symbol
V
CC
+
I
CC(sb)
V
th(IC)
R
(IC)
V
7(th)
I
S
τ
max
A
V
I
I
+
V
REF
V
REF
T
t
OSC
f
OSC
T
f
OSC
V
CC
t
on(min)
Parameter
Min.
0.7
Typ.
1.1
1
Max.
1.6
1.6
-880
Unit
V
mA
mV
mV
μ
A
%
Hysteresis on V
CC
+ Threshold
Stand-by Supply Current before starting (V
CC
+ < V
CC(start)
)
Current Limitation Threshold Voltage (Pin 3)
Collector Current Sensing Input Resistance
Demagnetization Sensing Threshold
Demagnetization Sensing Input Current (Pin7 = 0V)
Maximum Duty Cycle
Error Amplifier Gain
Error Amplifier Input Current (non-inverting input)
Internal Reference Voltage
-1100 -1000
1000
100
1
70
50
2
2.4
75
125
60
μ
A
V
2.3
2.5
Reference Voltage Temperature Drift
10
-4
V/
o
C
Oscillator Free-running Period ( R = 59k
, C = 1.2nF)
44
48
52
μ
s
Oscillator Frequency Drift with Temperature (V
CC
+ = +8V)
0.05
%/
o
C
Oscillator Frequency Drift with V
CC
+ (+8V < V
CC
+ < +14V)
0.5
%/V
Minimum Conducting Time (C
t
= 1nF)
2
μ
s
2
RECOMMENDED OPERATINGCONDITIONS
Symbol
V
CC
+
V
CC
-
I
O
f
oper
Parameter
Min.
Typ.
8
-3
Max.
Unit
V
V
A
kHz
Negative Supply Voltage
Output Current
Operating Frequency
0.5
30
2
8
7
6
5
4
3
2
1
TEA2018A
22nF
1.2nF
1%
4.7nF
V8
V7
V6
V1
V3
V4
470nF
22nF
22nF
1%
10
470
100
59k
2
TEST CIRCUIT
TEA2018A
3/7
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