Standard Flyback Regulators
ctparts.com
Not shown at actual size.
Equivalent Magnetics for
LM258x Flyback Regulator
Compliant
Available
RoHS
1. Leakage inductance measured across the primary at 0.10 Vrms, 100kHz
2. DC current at which the primary inductance is measured
3. Operating temperature range -40°C to +85°C
4. Electrical specifications at 25°C
ORDERING INFO
CTQ~~~~-BF
Please specify “F” for RoHS compliant
Part Number
CTQ4435-B_
CTQ4434-B_
CTQ4436-B_
CTQ4337-B_
CTQ4343-B_
CTQ4344-B_
CTQ4437-B_
Type
SM
TH
SM
TH
TH
TH
SM
L at 0 Adc
±15%
(µH)
22
22
22
22
85
85
55
L at Ipk
Min.
(µH)
19.0
19.8
19.0
19.8
76.5
76.5
47.3
Volt-time
product
Max. (Vµsec)
166.5
162.0
166.5
162.0
364.5
364.5
299.7
Leakage
Inductance
1
Max. (µH)
0.7
2.0
0.5
2.0
3.5
3.5
2.0
DCR
Primary
Ω
(Ω)
0.020
0.028
0.025
0.030
0.150
0.145
0.110
DCR
Secondary
Ω
(Ω)
0.025
0.028
0.23 (10-11)
0.25 (9-8)
0.32 (8-7, 6-5)
0.011 (10-9, 7-6)
0.20 (10-9, 7-6)
0.03 (4-5)
0.035 (3-2)
0.30 (9-8)
0.32 (4-5)
0.039 (8-7)
0.58 (6-5)
0.60 (3-4)
0.15 (10-11, 9-8)
0.20 (8-7)
0.24 (5-6)
0.065
0.042
Turns Ratio
1:1
1:1
1:2.5:2.5
1:2.5:2.5
1:0.8:0.8
1:0.35:0.8:0.8
1:0.5:1.167:1.167
Ipk
2
(A)
4.85
5.0
5.0
5.0
3.0
3.0
3.0
CTQ4338-B_
TH
66
59.4
499.5
3.5
0.090
1:0.5:1.167:1.167
3.0
CTQ4438-B_
CTQ4339-B_
CTS6057-A_
CTS6000-A_
SM
TH
SM
TH
65
66
47
47
57.0
59.4
40.0
40.0
299.7
499.5
233.1
212.6
3.0
3.0
2.0
2.0
0.065
0.090
0.065
0.065
1:1.2:1.2
1:1.2:1.2
1:1
1:1
3.0
3.0
3.0
3.0
SCHEMATICS
Schematics for Surface Mount (SM)
CTQ4435-B, CTS6057-A
CTQ4436-B, CTQ4438-B
CTQ4437-B
Schematics for Through Hole (TH)
CTQ4434-B, CTS6000-A
CTQ4337-B, CTQ4339-B
CTQ4338-B
CTQ4343-B
CTQ4344-B
12.11.06
Technologies
Manufacturer of Passive and Discrete Semiconductor Components
800-684-5322
Inside US
949-453-1811
Outside US
Copyright © 2006 by CT Magnetics, DBA Central Technologies. All rights reserved.
CT Magnetics reserves the right to make improvements or change specifications without notice
CENTRAL
Standard Flyback Regulators
ctparts.com
PHYSICAL DIMENSIONS
Unit: inch
Surface Mount (SM)
CTQ4435-B / CTQ4436-B / CTQ4437-B / CTQ4438-B / CTS6057-A
1
12
0.004 MAX
6
7
Recommended
Land pattern
Through Hole (TH)
CTQ4434-B / CTQ4337-B / CTQ4338-B / CTQ4339-B / CTS6000-A
1
4
1
8 1
4
4
5
8
5
Through Hole (TH)
CTQ4343-B / CTQ4344-B
Recommended
Footprint
12.11.06
Technologies
Manufacturer of Passive and Discrete Semiconductor Components
800-684-5322
Inside US
949-453-1811
Outside US
Copyright © 2006 by CT Magnetics, DBA Central Technologies. All rights reserved.
CT Magnetics reserves the right to make improvements or change specifications without notice
CENTRAL
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