CT CTQ4437-BF

Standard Flyback Regulators
Equivalent Magnetics for
LM258x Flyback Regulator
ctparts.com
Not shown at actual size.
RoHS
Compliant
Available
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
L at 0 Adc
±15%
(µH)
L at Ipk
Min.
(µH)
Volt-time
product
Max. (Vµsec)
Leakage
Inductance1
Max. (µH)
DCR
Primary
Ω)
(Ω
Part Number
Type
CTQ4435-B_
CTQ4434-B_
CTQ4436-B_
SM
TH
SM
22
22
22
19.0
19.8
19.0
166.5
162.0
166.5
0.7
2.0
0.5
0.020
0.028
0.025
CTQ4337-B_
CTQ4343-B_
CTQ4344-B_
TH
TH
TH
22
85
85
19.8
76.5
76.5
162.0
364.5
364.5
2.0
3.5
3.5
0.030
0.150
0.145
CTQ4437-B_
SM
55
47.3
299.7
2.0
0.110
CTQ4338-B_
TH
66
59.4
499.5
3.5
0.090
CTQ4438-B_
CTQ4339-B_
SM
TH
65
66
57.0
59.4
299.7
499.5
3.0
3.0
0.065
0.090
CTS6057-A_
CTS6000-A_
SM
TH
47
47
40.0
40.0
233.1
212.6
2.0
2.0
0.065
0.065
DCR
Secondary
Ω)
(Ω
Turns Ratio
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
1:1
1:1
1:2.5:2.5
4.85
5.0
5.0
1:2.5:2.5
1:0.8:0.8
1:0.35:0.8:0.8
5.0
3.0
3.0
1:0.5:1.167:1.167
3.0
1:0.5:1.167:1.167
3.0
1:1.2:1.2
1:1.2:1.2
3.0
3.0
1:1
1:1
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
CENTRAL
Technologies
12.11.06
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
Ipk2
(A)
CTQ4344-B
Standard Flyback Regulators
ctparts.com
PHYSICAL DIMENSIONS
Unit: inch
Surface Mount (SM)
CTQ4435-B / CTQ4436-B / CTQ4437-B / CTQ4438-B / CTS6057-A
0.004 MAX
1
12
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
CENTRAL
Technologies
12.11.06
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