L4981B STMicroelectronics, L4981B Datasheet - Page 8

• Manufacturer Part Number: L4981B
• Description: IC PFC CTRLR AVERAGE CURR 20DIP
• Manufacturer: STMicroelectronics

Specifications of L4981B

• Mode: Average Current
• Frequency - Switching: 100kHz
• Current - Startup: 100µA
• Voltage - Supply: 14.5 V ~ 19.5V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 20-DIP (0.300", 7.62mm)
• Switching Frequency: 115 KHz
• Maximum Operating Temperature: + 125 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: - 40 C
• Supply Voltage Range: 12V To 19.5V
• No. Of Pins: 20
• Operating Temperature Range: -40°C To +125°C
• Ic Generic Number: 4981
• Output Current Max: 300µA
• Rohs Compliant: Yes
• Input Voltage: 19.5V
• Leaded Process Compatible: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5337-5; L4981B

L4981A - L4981B
Figure 9A: L4981A Power Factor Corrector (200W)
f
Figure 9B: L4981B Power Factor Corrector (200W)
f
8/16
SW
SW
88V AC to 254V AC
= 80kHz; P
88V AC to 254V AC
= 80 to 92kHz; P
FUSE
Vi
FUSE
Vi
4 x BY214
NTC
4 x BY214
NTC
BRIDGE
BRIDGE
O
= 200W; V
O
= 200W; V
560 1%
560 1%
220nF
220nF
400V
400V
R11
R11
C1
C1
1.1M
5.1K
5.1K
R21
R22
R21
1%
1%
OUT
806K
806K
R17
R17
1%
1%
806K
806K
R17
R17
1%
1%
4
16
2
4
2
= 400V; I
8
8
7
7
2.7K
2.7K
5%
5%
R3
R3
OUT
5
5
27K 5%
27K 5%
0.07 2W
0.07 2W
R5
R5
R
R
220nF
220nF
100V
100V
S
S
C8
C8
= 400V; I
2.7K
2.7K
1nF
1nF
5%
5%
C3
R4
C3
R4
R7 360K 5% R6 620K 5%
R7 360K 5% R6 620K 5%
rms max
9
9
33K
10K 5%
33K
10K 5%
5%
5%
R8
R8
R20
R20
18
18
L4981B
L4981A
1.1nF
1nF
C4
C4
rms max
220nF
17
220nF
17
100V
100V
= 2.53A; V
C7
C7
R16
24K
R16
24K
1%
1%
620K
620K
5%
5%
R6
R6
2N2222
2N2222
D3
D3
12
12
1 F
16V
1 F
16V
C6
C6
= 2.53A; V
1.1M
1.1M
1.1M
1.1M
R19
R19
R19
R19
5%
5%
5%
5%
15
15
R23
R23
11
11
R22
R22
0.5W
0.5W
22V
22V
1 F
16V
1 F
16V
DZ
DZ
C5
C5
6
6
OVP
19
19
STK2N50
STK2N50
0.5W
1
0.5W
1
R15
10K
R15
10K
14
13
20
14
13
20
Q2
Q2
3
= 442V; I
3
D3 1N4150
D3 1N4150
OVP
100 F
100 F
C11
25V
C11
25V
D2 1N4150
D2 1N4150
0.5W
220K
0.5W
220K
R14
R12
R14
R12
5%
5%
56
56
15 5%
15 5%
R13
R13
= 442V; I
L 0.9mH
L 0.9mH
1N4150
1N4150
100V
100V
15nF
15nF
C10
C10
D4
PK max
D4
330nF
330nF
C9
C9
PK max
Q1
Q1
= 6.2A
STH/STW15NB50
11600
STH/STW15NB50
11600
BYT
BYT
D5
D5
D1 5TTA5060
D1 5TTA5060
= 6.2A
412K
412K
412K
412K
1.8K
R18
1.8K
R18
1%
1%
4W
1%
1%
4W
R1
R1
R1
R1
270pF
270pF
630V
630V
C12
C12
D93IN029C
D95IN220A
11K
11K
1%
1%
R2
R2
910K
910K
910K
910K
100 F
100 F
R10
R10
450V
21K
450V
21K
1%
1%
1%
1%
1%
1%
R9
R9
R9
R9
C2
C2
Vo
Vo
-
-
+
+