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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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RT8249 датащи(PDF) 5 Page - Richtek Technology Corporation |
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RT8249 датащи(HTML) 5 Page - Richtek Technology Corporation |
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5 / 23 page  RT8249A/B/C 5 DS8249A/B/C-02 June 2014 www.richtek.com © Copyright 2014 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. Over-Voltage Protection (OVP) & Under-Voltage Protection (UVP) The two channel output voltages are continuously monitored for over-voltage and under-voltage conditions. When the output voltage exceeds over-voltage threshold (113% of VOUT), UGATE goes low and LGATE is forced high. When it is less than 52% of reference voltage, under- voltage protection is triggered and then both UGATE and LGATE gate drivers are forced low. The controller is latched until ENx is reset or LDO5 is re-supplied. LDO5 and LDO3 When the VIN voltage exceeds the POR rising threshold, LDO3 will default turn-on. The LDO5 can be power on by ENx. The linear regulator LDO5 and LDO3 provide 5V and 3.3V regulated output. Switching Over The BYP1 is connected to the Channel 1 output. After the Channel 1 output voltage exceeds the set threshold (4.66V), the output will be bypassed to the LDO5 output to maximize the efficiency. |
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