Q4435-BL_14 Datasheet, PDF (1/3 Pages) Coilcraft lnc. – Magnetics for LM258x Flyback Regulator

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.
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
Ref.
Part voltage at 0 Adc at I pk
max ^  Inductance¹ D ^{CR (Ohms)}
number number (V) ±15% (µH)  min (µH)  (Vµsec) max (µH)  pri sec
Turns ratio
  _I pk2
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)

0.32 (6-5)
1 : 2.5 12 V, 0.35 A 5.0
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)
0.20 (7-6)
0.03 (4-5)
1 : 0.8 12 V, 0.75 A 3.0
1 : 0.8 12 V, 0.75 A
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)
0.58 (6-5)
0.60 (3-4)
1 : 0.5 5 V, 1.8 A 3.0
1 : 1.167 12 V, 0.25 A
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)

0.24 (5-6)
1 : 1.2  12 V, 0.63 A 3.0
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.
Core material Ferrite
Ambient temperature  –40°C to +85°C
Weight
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
Q4435-BL:
Q4436-BL:
Q4437-BL:
Q4438-BL:
S6000-AL:
S6057-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.
US [phone] [e-mail]
UK [phone] [e-mail]
Taiwan [phone] [e-mail]
China [phone] [e-mail]
Singapore + 65-6484 8412 [e-mail]
Document 183-1  Revised 11/01/12
© 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.