lc5521d Allegro MicroSystems, Inc., lc5521d Datasheet - Page 4

• Manufacturer Part Number: lc5521d
• Description: Single-stage Power Factor Corrected Off-line Switching Regulator Ic
• Manufacturer: Allegro MicroSystems, Inc.

LC5521D
ELECTRICAL CHARACTERISTICS (Controller Chip)
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Power Supply Startup Operation
Operation Start Voltage
Operation Stop Voltage
Circuit Current in Operation
Startup Circuit Operation Voltage
Startup Current
Startup Current Supplying Threshold
Voltage-1
Startup Current Supplying Threshold
Voltage-2
Normal Operation
Oscillation Minimum Frequency
Maximum On Time
FB Terminal Minimum Voltage
in Feedback Operation
Maximum Feedback Current
Leading Edge Blanking Time
Quasi-Resonant Operation Threshold
Voltage-1
Quasi-Resonant Operation Threshold
Voltage-2
Protection Operation
Over-Current Detection Threshold
Voltage
OCP Terminal Source Current
OVP Operation Voltage of OCP
Terminal
OLP Threshold Voltage
OLP Threshold Voltage
OVP Terminal Threshold Voltage
OVP Operation Voltage of VCC
Terminal
Thermal Shutdown Operating
Temperature
1
2
The current ratings are based on those of the IC, and plus (+) represents sink and minus (-) represents source.
The relation of V
Characteristics
CC(BIAS)1
> V
CC(OFF)
is applied for each product.
I
CC(STARTUP)
V
V
V
V
V
V
Symbol
V
V
V
V
t
V
V
I
I
CC(BIAS)1
CC(BIAS)2
OCP(OVP)
T
ON(MAX)
STARTUP
FB(MAX)
FB(OLP)1
FB(OLP)2
CC(OFF)
CC(ON)
V
CC(OVP)
BD(TH1)
BD(TH2)
V
FB(MIN)
CC(ON)
f
I
J(TSD)
t
OSC
OCP
BW
OCP
OVP
V
V
V
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
D/ST
D/ST
D/ST
= 100 V, V
= 100 V
= 100 V
1
T
CC
Test Conditions
A
= 25°C, V
= 13 V
Single-Stage Power Factor Corrected
CC
Off-Line Switching Regulator IC
= 20 V, unless otherwise specified
2 – 1
2 – 1
2 – 1
8 – 1
2 – 1
2 – 1
2 – 1
8 – 1
8 – 1
4 – 1
4 – 1
3 – 1
3 – 1
3 – 1
3 – 1
3 – 1
3 – 1
4 – 1
4 – 1
6 – 1
2 – 1
Pins
–
−0.54
−120
Min.
13.8
−5.5
14.4
30.0
0.55
0.14
0.12
28.5
11.0
−10
135
8.4
9.5
2.2
5.0
4.1
1.6
42
–
−
−0.60
Typ.
15.1
−3.0
16.6
14.0
40.0
0.90
0.24
0.17
31.5
11.0
−25
500
−40
9.4
2.6
5.5
4.5
2.0
57
–
–
−0.66
Max.
17.3
10.7
−1.0
12.5
18.8
18.0
50.0
1.25
0.34
0.22
34.0
−40
−10
3.7
3.0
6.0
4.9
2.4
72
−
–
Unit
kHz
mA
mA
μA
μA
μs
ns
°C
V
V
V
V
V
V
V
V
V
V
V
V
V
V
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