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參數(shù)資料
| 型號： | LC5521D |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2.5 A POWER FACTOR CONTROLLER, 18 kHz SWITCHING FREQ-MAX, DIP7 |
| 封裝： | DIP-8/7 |
| 文件頁數(shù)： | 6/40頁 |
| 文件大?。?/td> | 888K |
| 代理商： | LC5521D |
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14
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
28106.02
LC5523F ELECTRICAL CHARACTERISTICS (Controller Chip)1 TA = 25°C, VCC = 20 V, unless otherwise specified
Characteristics
Symbol
Test Conditions
Pins
Min.
Typ.
Max.
Unit
Startup Operation
Operation Start Voltage
VCC(ON)
4 – 2
13.8
15.1
17.3
V
Operation Stop Voltage2
VCC(OFF)
4 – 2
8.4
9.4
10.7
V
Operating Current
ICC(ON)
4 – 2
–
3.7
mA
Startup Circuit Operation Voltage
VSTARTUP
1 – 2
42
57
72
V
Startup Current
ICC(STARTUP)
4 – 2
5.5
3.0
1.0
mA
Startup Current Threshold Biasing
Voltage-12
VCC(BIAS)1
4 – 2
9.5
11.0
12.5
V
Startup Current Threshold Biasing
Voltage-2
VCC(BIAS)2
4 – 2
14.4
16.6
18.8
V
Normal Operation
Minimum Oscillation Frequency
fOSC
1 – 2
11.0
14.0
18.0
kHz
Maximum On-Time
tON(MAX)
1 – 2
30.0
40.0
50.0
μs
FB Pin Voltage Minimum Limit
VFB(MIN)
6 – 2
0.55
0.90
1.25
V
Maximum Feedback Current
IFB(MAX)
6 – 2
10
25
40
μA
Leading Edge Blanking Time
tBW
5 – 2
–
500
–
ns
Quasi-Resonant Operation Threshold
Voltage-1
VBD(TH1)
5 – 2
0.14
0.24
0.34
V
Quasi-Resonant Operation Threshold
Voltage-2
VBD(TH2)
5 – 2
0.12
0.17
0.22
V
Protection Operation
OCP Pin Overcurrent Protection
(OCP) Threshold Voltage
VOCP
5 – 2
0.54
0.60
0.66
V
OCP Pin Source Current
IOCP
5 – 2
120
40
10
μA
OCP Pin Overvoltage Protection
(OVP) Threshold Voltage
VOCP(OVP)
5 – 2
2.2
2.6
3.0
V
Overload Protection (OLP) Threshold
Voltage-1
VFB(OLP)1
6 – 2
5.0
5.5
6.0
V
Overload Protection (OLP) Threshold
Voltage-2
VFB(OLP)2
6 – 2
4.1
4.5
4.9
V
OVP Pin OVP Threshold Voltage
VOVP
7 – 2
1.6
2.0
2.4
V
VCC Pin OVP Threshold Voltage
VCC(OVP)
4 – 2
28.5
31.5
34.0
V
Thermal Shutdown Activating
Temperature
TJ(TSD)
–
135
–
°C
1
Current direction is sink is positive (+) and source is negative (–) in reference to the IC.
2
VCC(BIAS)1 > VCC(OFF) always.
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