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TPS54355MPWPREP Datasheet(PDF) 11 Page - Texas Instruments |
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TPS54355MPWPREP Datasheet(HTML) 11 Page - Texas Instruments |
11 / 35 page VI(SYNC) VO(PH) Internal Oscillator VO(PH) VO(SYNC) Power Good (PWRGD) TPS54352-EP ,, TPS54353-EP,, TPS54354-EP TPS54355-EP , TPS54356-EP, TPS54357-EP www.ti.com ....................................................................................................................................................... SLVS684A – JANUARY 2007 – REVISED JULY 2009 Figure 3. SYNC Input Waveform Figure 4. SYNC Output Waveform The VSENSE pin is compared to an internal reference signal if the VSENSE is greater than 97% and no other faults are present. The PWRGD pin presents a high impedance. A low on PWRGD indicates a fault. PWRGD has been designed to provide a weak pulldown and indicates a fault even when the device is unpowered. If the TPS5435x has power and has any fault flag set, the TPS5435x indicates the power is not good by driving the PWRGD pin low. The following events, singly or in combination, indicate power is not good: • VSENSE pin out of bounds • Overcurrent • Thermal shutdown • UVLO undervoltage • Input voltage not present (weak pulldown) • Slow starting • VBIAS voltage is low. Copyright © 2007–2009, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Link(s): TPS54352-EP TPS54353-EP TPS54354-EP TPS54355-EP TPS54356-EP TPS54357-EP |
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