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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SSL4120T датащи(PDF) 31 Page - NXP Semiconductors |
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SSL4120T датащи(HTML) 31 Page - NXP Semiconductors |
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31 / 47 page  SSL4120T All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved. Objective data sheet Rev. 1 — 21 June 2012 31 of 47 NXP Semiconductors SSL4120T Resonant power supply control IC with PFC Capacitive mode is detected when the HB slope does not start within tto(cmr) after the MOSFETs have switched off. Detection of Capacitive mode will increase the switching frequency. This is realized by discharging the soft start capacitor with a relatively high current Icmr(hf)(SSHBC) from the instant tto(cmr) has expired until the half-bridge slope has started. The frequency increase regulates the HBC to the border between capacitive and inductive mode. 7.9 Protection overview Table 4. Overview protections Protected Part Symbol Protection Affected Action Description IC UVP-SUPIC Undervoltage protection SUPIC IC disable Section 7.2.1 IC UVP-SUPREG Undervoltage protection SUPREG IC disable Section 7.2.2 IC UVP-supplies Undervoltage protection supplies IC disable and reset Section 7.3 IC SCP-SUPIC Short circuit protection SUPIC IC low HV start-up current Section 7.2.4 IC OVP-output Overvoltage protection output IC shut-down Section 7.5.4 IC UVP-output Undervoltage protection output IC restart after protection time Section 7.5.5 IC OTP Overtemperature protection IC disable Section 7.5.6 PFC OCR-PFC Overcurrent regulation PFC PFC switch off cycle-by-cycle Section 7.7.7 PFC UVP-mains Undervoltage protection mains PFC suspend switching Section 7.7.8 PFC OVP-boost Overvoltage protection boost PFC suspend switching Section 7.7.9 PFC SCP-boost Short circuit protection boost IC restart Section 7.7.10 PFC OLP-PFC Open-loop protection PFC IC restart Section 7.7.10 HBC UVP-boost Undervoltage protection boost HBC disable Section 7.8.2 HBC OLP-HBC Open-loop protection HBC IC restart after protection time Section 7.8.7 HBC HFP-HBC High-frequency protection HBC IC restart after protection time Section 7.8.9 HBC OCR-HBC Overcurrent regulation HBC HBC IC increase frequency restart after protection time Section 7.8.10.2 HBC OCP-HBC Overcurrent protection HBC HBC step to maximum frequency Section 7.8.10.3 HBC CMR Capacitive mode regulation HBC increase frequency Section 7.8.11 HBC ANO Adaptive non-overlap HBC prevent hazardous switching Section 7.8.4 |
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