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LOW PROFILE SPLIT BOBBIN MICROPROCESSOR
PRINTED CIRCUIT POWER TRANSFORMERS


 Low Profile Split Bobbin Microprocessor Printed Circuit Power Transformers


  • Low profile - allows closer printed circuit board stacking.

  • Split bobbin construction - center flange insulation barrier provides 2500 VRMs Hipot - non concentric coil winding results in low interwinding capacitance, eliminates need for electro-static shielding.

  • Class S (130 C) insulation system.

  • Single 115V and Dual 115V/230V primaries are standard.

  • DC output combinations -  +/-12 and 5V or +/-15 and 5V rated at the regulator output  with allowance for the line variations up to +/-13%.

  • Packaging Flexibility.



Primary 50/60 Hz Regulated DC Ratings

Size

Single 115V Dual 115V/230V IC1 IC2
LM4-12 LDM4-12 5VDC@185mA +/-12VDC@35mA 4
LM5-12 LDM5-12 5VDC@365mA +/-12VDC@60mA 5
LM6-12 LDM6-12 5VDC@850mA +/-12VDC@150mA 6
LM4-15 LDM4-15 5VDC@185mA +/-15VDC@30mA 4
LM5-15 LDM5-15 5VDC@365mA +/-15VDC@50mA 5
LM6-15 LDM6-15 5VDC@850mA +/-15VDC@130mA 6


RECOMMENDED COMPONENTS
Part Number C1 C2 C3 C4 D1(2) D2(4) IC1

IC2

MFD V MFD V MFD V MFD V
LM4-12/LDM4-12 1000 20 2.7 20 150 50 10 20 1N4001 1N4002 LM342P-5.0 LM326N
LM4-15/LDM4-15 1000 20 2.7 20 150 50 10 20 1N4001 1N4002 LM342P-5.0 LM325N
LM5-12/LDM5-12 2100 30 2.7 20 250 50 10 20 1N4001 1N4002 LM341P-5.0 LM326N
LM5-15/LDM5-15 2100 30 2.7 20 250 50 10 20 1N4001 1N4002 LM341P-5.0 LM325N
LM6-12/LDM6-12 4000 20 2.7 20 1000 50 2.7 20 1N4001 1N4002 LM340K-5.0 LM326N
LM6-15/LDM6-15 4000 20 2.7 20 1000 50 2.7 20 1N4001 1N4002 LM340K-5.0 LM325N


SCHEMATICS

LM SERIES

LDM SERIES

Schematic Diagram Schematic Diagram



LM, LDM Size L W H P-1 P-2 B Wt. (oz.)
4 1-5/8 1-3/8 1-3/16 .200 .250 .950 5
5 1-7/8 1-5/8 1-5/16 .200 .300 1.100 9
6 2-1/4 1-7/8 1-9/16 .200 .300 1.300 14



MECHANICAL

Mechanical Diagram


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