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UC2825A-EP Fiches technique(PDF) 11 Page - Texas Instruments |
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UC2825A-EP Fiches technique(HTML) 11 Page - Texas Instruments |
11 / 21 page 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 Submit Documentation Feedback 11 Product Folder Link(s): UC2825A-EP |
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