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UC2825A-EP Fiches technique(PDF) 11 Page - Texas Instruments

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No de pièce UC2825A-EP
Description  HIGH-SPEED PWM CONTROLLER
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
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UC2825A-EP Fiches technique(HTML) 11 Page - Texas Instruments

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UDG−95111
39 W
RT
CT
10 W
5
6
VSYNC
50-W
External
Clock
UDG−95113
Master
Slave
4
5
6
5
6
39 pF
120 W
1.15 RT
CT
RT
CT
4.7 k
22 W
UDG−95112
VSYNC
VCT
UC2825A-EP
www.ti.com
SGLS305D – JULY 2005 – REVISED SEPTEMBER 2010
Synchronization
The oscillator can be synchronized by an external pulse inserted in series with the timing capacitor. Program the
free-running frequency of the oscillator to be 10% to 15% slower than the desired synchronous frequency. The
pulse width should be greater than 10 ns and less than half the discharge time of the oscillator. The rising edge
of the CLK/LEB pin can be used to generate a synchronizing pulse for other chips. Note that CLK/LEB no longer
accepts an incoming synchronizing signal.
Figure 9. General Oscillator Synchronization
Figure 10. Two-Unit Interface
Figure 11. Operational Waveforms
Copyright © 2005–2010, Texas Instruments Incorporated
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