772 Series
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Pulse Transformers
SELECTION GUIDE
Order Code
Parameter Units
Turns ratio 1:1 1:1:1 2:1:1 2:1:1 1:1 1:1:1 1:1:1 2:1:1 1:1 1:1:1 2:1:1
Primary Inductance
1.0 1.0 1.0 1.0 4.0 4.0 4.0 4.0 16.3 16.3 16.3 mH
(Min.)
FEAATTURESURES
Primary Et Constant
120 120 120 120 240 240 240 240 482 482 482 Vs
RoHS compliant
(Min.)
Inductance to 16.3mH Leakage Inductance
2.0 3.0 3.5 3.5 5.0 11 11 11 18 40 40 H
(Max.)
Up to 482 Vs Et rating
Interwinding
50 40 30 30 55 35 18 35 65 40 40 pF
Capacitance (Max.)
PCB mounting
DC Resistance (Max.)
UL 94 V-0 package materials 0.25 0.25 0.24 0.24 0.86 0.90 0.90 0.84 3.50 3.60 3.50
Primary winding
Up to 4000Vrms isolation
DC Resistance (Max.)
0.23 0.22 0.12 0.12 0.83 0.76 0.76 0.38 3.40 3.10 1.60
Secondary1 winding
Backward compatible with
DC Resistance (Max.)
Sn/Pb soldering systems
- 0.28 0.15 0.15 - 1.10 1.10 0.50 - 4.20 2.00
Secondary2 winding
Isolation voltage ( ash
2.5 4.0 2.5 kVrms
tested for 1 second)
DESCRIPTION
The 772 series of pulse transformers are intended
ABSOLUTE MAXIMUM RATINGS
for medium power applications in switch mode
Operating free air temperature range 0C to 70C
power supplies and thyristor/triac ring (e.g.
motor control applications). The standard turns Storage temperature range -60C to 125C
ratios may be modi ed on any transformer with
Lead Temperature 1.5mm from case for 10 seconds 300C
three windings by connecting any two windings
in series.
1
SOLDERING INFORMATION
Peak wave solder temperature 300C for 10 seconds
Pin nish Matte tin with nickel pre-plate
Speci cations typical at T = 25C
A
1 For further information, please visit www.murata-ps.com/rohs
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
KMP_772C_B04 Page 1 of 3
77201C
77202C
77203C
77203HVC
77204C
77205C
77205SC
77206C
77207C
77208C
77209C20.30 (0.799)
772 Series
Pulse Transformers
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS RECOMMENDED FOOTPRINT DETAILS
25.40 (1.00)
1.20+0.15-0.00
1 3
(0.472+0.006-0.000)
4
5
77202C
YYWW
2.54 (0.1)
2 6
2.54 (0.1)
5.92
Unless otherwise stated all dimensions in mm (inches) 0.25 (0.01).
(0.233)
12.30
(0.484)
TUBE DIMENSIONS
12.5
(0.492)
0.66 (0.026) Max.
2.53 (0.100)
5.08
(0.2)
15.24
(0.6)
5.08
(0.2)
3.05
20.32 (0.8)
(0.120)
11.50 (0.453)
All dimensions in mm (inches) XX.X0.50(0.02), XX.XX0.25(0.01).
Tube length: 530 (20.87) Max.
All pins on a 2.54 (0.1) pitch.
Unless otherwise stated all dimensions in mm (inches) 0.25 (0.01).
PIN CONNECTION STYLE - 8 PIN DIP (TOP VIEW)
Screen*
1 3
Secondary 1
4
Primary
5
Secondary 2
6
2
* Only on 77205SC
www.murata-ps.com/support
KMP_772C_B04 Page 2 of 3
0.750.12
13.30 (0.524)
(0.0300.005)
22.50 (0.886)