US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2018
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Document 183-1
Magnetics for LM258x Flyback Regulator
These standard flyback regulator transformers are designed
for use with Texas Instruments LM2585, LM2586, LM2587
and LM2588 SIMPLE SWITCHER® switching regulators.
Volt-time
Input Inductance Inductance product Leakage
Ref. Part voltage at 0 Adc at I pk max
Inductance1
DCR (Ohms) Turns ratio
I pk2
number number (V) ±15% (µH) min (µH) (Vµsec) max (µH) pri sec pri : sec Output (A)
T1 (SM) Q4435-BL 4 – 6 22 19.0 166.5 0.7 0.020 0.025 1 : 1 5 V, 1.6 A 4.85
T1 (PC) Q4434-BL 4 – 6 22 19.8 162.0 2.0 0.028 0.028 1 : 1 5 V, 1.6 A 5.0
T2 (SM) Q4436-BL 4 – 6 22 17.6 166.5 0.5 0.025 0.23 (10-11) 1 : 2.5 12 V, 0.35 A 5.0
0.25 (9-8) 1 : 2.5 12 V, 0.35 A
T2 (PC) Q4337-BL 4 – 6 22 19.8 162.0 2.0 0.030 0.32 (8-7) 1 : 2.5 12 V, 0.35 A 5.0
0.32 (6-5) 1 : 2.5 12 V, 0.35 A
T3 (PC) Q4343-BL 18 – 36 85 76.5 364.5 3.5 0.150 0.011 (10-9) 1 : 0.8 12 V, 1.4 A 3.0
0.011 (7-6) 1 : 0.8 12 V, 1.4 A
T4 (PC) Q4344-BL 18 – 36 85 76.5 364.5 3.5 0.145 0.20 (10-9) 1 : 0.8 12 V, 0.75 A 3.0
0.20 (7-6) 1 : 0.8 12 V, 0.75 A
0.03 (4-5) 1 : 0.35 5 V, 3.0 A
T5 (SM) Q4437-BL 18 – 36 55 47.3 299.7 2.0 0.110 0.035 (10-11) 1 : 0.5 5 V, 1.8 A 3.0
0.30 (9-8) 1 : 1.167 12 V, 0.25 A
0.32 (4-5) 1 : 1.167 12 V, 0.25 A
T5 (PC) Q4338-BL 18 – 36 66 59.4 499.5 3.5 0.090 0.039 (8-7) 1 : 0.5 5 V, 1.8 A 3.0
0.58 (6-5) 1 : 1.167 12 V, 0.25 A
0.60 (3-4) 1 : 1.167 12 V, 0.25 A
T6 (SM) Q4438-BL 18 – 36 65 57.0 299.7 3.0 0.065 0.15 (10-11) 1 : 1.2 12 V, 0.63 A 3.0
0.15 (9-8) 1 : 1.2 12 V, 0.63 A
T6 (PC) Q4339-BL 18 – 36 66 59.4 499.5 3.0 0.090 0.20 (8-7) 1 : 1.2 12 V, 0.63 A 3.0
0.24 (5-6) 1 : 1.2 12 V, 0.63 A
T7 (SM) S6057-AL 4 – 6 47 40.0 233.1 2.0 0.065 0.065 1 : 1 5 V, 0.9 A 3.0
T7 (PC) S6000-AL 4 – 6 47 40.0 212.6 2.0 0.065 0.042 1 : 1 5 V, 0.9 A 3.0
1. Leakage inductance measured across the primary at 0.10 Vrms, 100 kHz.
2. DC current at which the primary inductance is measured.
3. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
They are available in surface mount and through hole
configurations. All feature 500 V isolation between wind-
ings and a variety of available turns ratios.
Core material Ferrite
Ambient temperature –40°C to +85°C
Weight
Q4337-BL: 11.4 g
Q4338-BL: 11.5 g
Q4339-BL: 11.6 g
Q4343-BL: 25.1 g
Q4344-BL: 23.1 g
Q4434-BL: 11.5 g
Q4435-BL: 9.0 g
Q4436-BL: 8.7 g
Q4437-BL: 8.2 g
Q4438-BL: 8.6 g
S6000-AL: 10.6 g
S6057-AL: 8.2 g
Storage temperature Component: –40°C to +85°C.
Tray packaging: –40°C to +80°C
Resistance to soldering heat (SM parts) Max three 40 second
reflows at +260°C, parts cooled to room temperature between cycles
Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /
85% relative humidity)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332
PCB washing Tested with pure water or alcohol only. For other solvents,
see Doc787_PCB_Washing.pdf.
Document 183-1 Revised 05/09/18
US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2018
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Magnetics for LM258x Flyback Regulator
Document 183-2 Revised 05/09/18
Schematics – Surface Mount (SM)
Schematics – Leaded (PC)
5V, 1.6 A
Q4435-BL
T1
310
211
5V, 1.6 A
Q4434-BL
T1
27
18
5V, 0.9 A
S6057-AL
T7
3
10
2
11
Q4436-BL
12 V, 0.35 A
12 V, 0.35 A
T2
310
9
211
8
Q4337-BL
12 V, 0.35 A
12 V, 0.35 A
T2
27
6
18
5
Q4438-BL
12 V, 0.63 A
12 V, 0.63 A
T6
310
9
211
8
Q4437-BL
5V, 1.8 A
12 V, 0.25 A
12 V, 0.25 A
T5
310
9
4
211
8
5
Q4338-BL
5V, 1.8 A
12 V, 0.25 A
12 V, 0.25 A
T5
2
7
6
3
1
8
5
4
5V, 0.9 A
S6000-AL
T7
27
18
Q4344-BL
5V, 3.0 A
12 V, 0.75 A
12 V, 0.75 A
T4
110
7
4
29
6
5
Q4339-BL
12 V, 0.63 A
12 V, 0.63 A
T6
27
6
18
5
Q4343-BL
12 V, 1.4 A
12 V, 1.4 A
T3
110
7
29
6
Document 183-2
US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2018
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Magnetics for LM258x Flyback Regulator
Document 183-3 Revised 05/09/18
Document 183-3
Recommended
Land Pattern
Topview
12
11
7
6
max
max
0.610
15,49
1.00
25,4
0.75
19,05
0.733
18,62
0.150
3,81
0.145
3,68
0.100
2,54
0.615
15,62
0.11
4×0.020
2,90×0,51 0.843
21,41
0.030
0,76
0.100
2,54
0.150
3,81
0.004/0,10
Part Height max
number in/mm
Q4435-BL 0.60/15.24
Q4436-BL
Q4437-BL
Q4438-BL
S6057-AL
0.60/15.24
0.60/15.24
0.60/15.24
0.57/14.50
See
table
Surface Mount (Q4435-BL, Q4436-BL, Q4437-BL, Q4438-BL, S6057-AL)
Standoffs
1
1
45
8
(1 place)
(5 places)
Recommended
BoardLayout
0.060
1,52
0.025×0.025
0,635×0,635
max
max
max
max
0.950
24,13 0.514
13,06
0.700
17,78
0.825
20,96
0.15
3,81
0.20
5,08
0.180
4,57
Bottom view
Leaded – T1, T2, T5, T6, T7 (Q4434-BL, Q4337-BL, Q4338-BL, Q4339-BL, S6000-AL)
Standoffs
1
56
10
0.620
15,75
1
Recommended
BoardLayout
max
max
max
1.10
27,94
1.10
27,94
0.0346
0,879
0.060
1,52
0.950
24,13
0.180
4,57
max
(1 place)
(7 places)
0.15
3,81
0.20
5,08
Bottom view
Leaded – T3, T4 (Q4343-BL, Q4344-BL)
Terminations RoHS tin-silver over tin over copper clad steel.
Packaged 49 parts per tray
Terminations RoHS tin-silver over tin over nickel over phos bronze.
Packaged 49 parts per tray
Terminations RoHS tin-silver over tin over copper.
Packaged 30 parts per tray
inches
mm
Dimensions
are in
inches
mm
Dimensions are in
inches
mm
Dimensions
are in
