Document 457
For Maxim MAX5941A
Flyback Transformer PoE Interface/PWM Controller
• Dual-output continuous-current flyback transformer
• Operates with 18 – 72 Volts input
• 1500 Vrms isolation between the primary and the secondary
Core material Ferrite
Terminations RoHS tin-silver over tin over nickel over phos
bronze. Other terminations available at additional cost.
Weight 4.9 g
Ambient temperature –40°C to +125°C
Storage temperature Component: –40°C to +125°C.
Packaging: –40°C to +80°C
Resistance to soldering heat 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
Packaging 200 per 13″ reel Plastic tape: 44 mm wide,
0.35 mm thick, 28 mm pocket spacing, 9.6 mm pocket depth
PCB washing Only pure water or alcohol recommended
Inductance Inductance
Leakage
inductance4
max (µH)
DCR max (Ohms)
N2 N3 N4
0.335 0.020 0.017 0.200 0.745
Turns ratio
N1 : N2 : N3 : N4 : N5
Part
at 0 A2
at Ipk3
Ipk3
number1 ±10% (µH)
min (µH)
N1
N5
(A)
C1154-BL_ 255.0
229.5
5.0
1:0.1:0.075 :0.125 :0.425 0.25
1. When ordering, please specify packaging code:
2. Inductance is for the primary, measured at 275 kHz, 1.0 Vrms.
3. Peak primary current drawn at minimum input voltage.
4. Leakage inductance is for the primary winding with the secondary
windings shorted.
C1154-BLD
Packaging: D = 13″ machine ready reel. EIA-481 embossed plastic
tape (200 parts per full reel).
5. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
B = Less than full reel. In tape, but not machine ready. To
have a leader and trailer added ($25 charge), use
code letter D instead.
8
Dot indicates pin 1
0.028
0.07
1,79
N2
1
0,72
Secondary
3.3 V
5
1
12
1
12
N1
Primary
0.098
2,5
0.677
17,20
max
C1154-B
12
7
N3
Secondary
2.5 V
6
7
0.135
3,43
0.665
16,88
11
2
0.098
2,5
0.865
max
6
21,97
N5
Bias
Recommended
Land Pattern
9
N4
Drive
5 V
4
0.335
8,51
max
0.004/0,10
0.590
14,98
0.079
2,01
0.693
17,60
Specifications subject to change without notice.
Please check our website for latest information.
Document457 Revised10/28/08
© Coilcraft, Inc. 2010