FACT SHEET Horizontal deflection transistors 17", monitors U

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FACT SHEET Horizontal deflection transistors 17", monitors U

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FACT SHEET
Horizontal deflection transistors 17", monitors
Using Philips' CU15/35 drive transformer BU4525AF/AX transistor
Most monitor designs required operate frequencies kHz. This fact sheet describes Philips Semiconductors' solution horizontal deflection circuit. circuit uses CU15/35 drive transformer from Philips Components BU4525AF/AX deflection transistor from Philips Semiconductors. circuit employs drive transformer designed specifically optimum switching Philips' deflection transistors multi-frequency applications. circuit complete solution horizontal output stage: `Hdrive' point attached output most deflections/sync ICs. concepts employed this circuit explained technical paper "Low power, cost horizontal drive circuits with Cores" (ETV/AN97002).
Hdrive
MGL567
Fig.1 Horizontal deflection circuit 17", monitors
Component Values: 1N4148; 1N4148; BZX79C6V8; Philips BC337A; Philips CU15/35; Philips BU4525AF/AX; BYV28-50; 2kV; Philips BY359X-1500S;
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MGL560
MGL561
MGL562
Fig.2 time A/div, µs/div)
Fig.3 time A/div, µs/div)
Fig.4 time (200 V/div, µs/div)
Figures show important waveforms horizontal deflection circuit. base drive currents (Ib1 Ib2) have been optimized application with duty cycle running peak kHz. seen, peak 1150 operating conditions summarized Table
Table Operating conditions -4.2 1200
This circuit also used lower frequency modes required, without modification. duty cycle altered, then small changes required once again optimize circuit. circuit employs some concepts that have very important benefits monitor design: total dissipation: `green design'. component count. Low-voltage, low-cost components. Flexible design: easy change designs. Reliable circuit fault transient conditions. concepts discussed this fact sheet easily applied other multi-frequency monitor applications.
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Philips Electronics N.V. 1999
rights reserved. Reproduction whole part prohibited without prior written consent copyright owner. information presented this document does form part quotation contract, believed accurate reliable changed without notice. liability will accepted publisher consequence use. Publication thereof does convey imply license under patent- other industrial intellectual property rights.
Printed Netherlands
Date release: September
1999
Document order number:
9397 06231

FACT SHEET Horizontal deflection transistors 17", monitors U

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