Document 183-1
Magnetics for LM258xFlyback Regulator
These standard flyback regulator transformers are designed
for use with Texas Instruments LM2585, LM2586, LM2587
and LM2588 SIMPLE SWITCHER® switching regulators.
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.
Volt-time
Input Inductance Inductance product Leakage
DCR (Ohms)
pri sec
0.025
Ref.
Part
voltage at 0 Adc
at Ipk
max Inductance1
Turns ratio
pri : sec
Ipk2
number number
(V) ±±15 (ꢀH) min (ꢀH) (Vꢀsec) max (ꢀH)
Output
5 V, 1.6 A
5 V, 1.6 A
(A)
T1 (SM) Q4435-BL 4 – 6
T1 (PC) Q4434-BL 4 – 6
T2 (SM) Q4436-BL 4 – 6
22
22
22
19.0
19.8
17.6
166.5
162.0
166.5
0.7
2.0
0.5
0.020
0.028
0.025
1:1
4.85
5.0
0.028
1:1
0.23 (10-11)
0.25 (9-8)
1:2.5
1:2.5
12 V, 0.35 A 5.0
12 V, 0.35 A
T2 (PC) Q4337-BL 4 – 6
T3 (PC) Q4343-BL 18 – 36
T4 (PC) Q4344-BL 18 – 36
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
0.32 (8-7)
0.32 (6-5)
1:2.5
1:2.5
12 V, 0.35 A 5.0
12 V, 0.35 A
0.011 (10-9)
0.011 (7-6)
1:0.8
1:0.8
12 V, 1.4 A
12 V, 1.4 A
3.0
0.20 (10-9)
0.20 (7-6)
0.03 (4-5)
1:0.8
1:0.8
1:0.35 5 V, 3.0 A
12 V, 0.75 A 3.0
12 V, 0.75 A
T5 (SM) Q4437-BL 18 – 36
T5 (PC) Q4338-BL 18 – 36
55
66
47.3
59.4
299.7
499.5
2.0
3.5
0.110
0.090
0.035 (10-11) 1:0.5
5 V, 1.8 A
3.0
3.0
0.30 (9-8)
0.32 (4-5)
1:1.167 12 V, 0.25 A
1:1.167 12 V, 0.25 A
0.039 (8-7)
0.58 (6-5)
0.60 (3-4)
1:0.5
5 V, 1.8 A
1:1.167 12 V, 0.25 A
1:1.167 12 V, 0.25 A
T6 (SM) Q4438-BL 18 – 36
T6 (PC) Q4339-BL 18 – 36
65
66
57.0
59.4
299.7
499.5
3.0
3.0
0.065
0.090
0.15 (10-11)
0.15 (9-8)
1:1.2
1:1.2
12 V, 0.63 A 3.0
12 V, 0.63 A
0.20 (8-7)
0.24 (5-6)
1:1.2
1:1.2
12 V, 0.63 A 3.0
12 V, 0.63 A
T7 (SM) S6057-AL 4 – 6
T7 (PC) S6000-AL 4 – 6
47
47
40.0
40.0
233.1
212.6
2.0
2.0
0.065
0.065
0.065
0.042
1:1
1:1
5 V, 0.9 A
5 V, 0.9 A
3.0
3.0
Core material Ferrite
Ambient temperature –40°C to +85°C
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.
Weight
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Q4337-BL:
Q4338-BL:
Q4339-BL:
Q4343-BL:
Q4344-BL:
Q4434-BL:
11.4 g
11.5 g
11.6 g
25.1 g
23.1 g
11.5 g
Q4431-BL:
Q4436-BL:
Q4437-BL:
Q4438-BL:
S6000-AL:
S6017-AL:
9.0 g
8.7 g
8.2 g
8.6 g
10.6 g
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 11/01/12
US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2014
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.
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