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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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RT4832AWSC Fiches technique(PDF) 22 Page - Richtek Technology Corporation |
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RT4832AWSC Fiches technique(HTML) 22 Page - Richtek Technology Corporation |
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22 / 26 page  RT4832A Copyright © 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS4832A-00 January 2017 22 STRB IFLED Txmask Vin Monitor Torch/ Flash 0 0 0 0 0 Torch Mode Torch Current Torch Current Torch Current 0 Torch Current Torch Current Strobe Enable 0 0 STRB IFLED Txmask Vin Monitor Torch/ Flash 0 0 0 0 0 Torch Current 0 Strobe Enable 0 0 Flash Mode Flash Current Flash Current Torch Current Flash Current > Flash Timeout Flash Timeout Flash Current Torch Current Figure 5. Flash LED Operation Over-Voltage Protection (Open LED, Open Circuit) The RT4832A FLED provides an internal over voltage protection to limit its output voltage. The OVP function prevents the RT4832A from damaging while open LED or open circuit condition occurs. Once the open circuit condition is removed, and the RT4832A will return to normal operation. Over-Current Protection The RT4832A features two selectable flash inductor current limits that are programmable through the I2C compatible interface. When the inductor current limit is reached, the RT4832A terminates the charging phase of the switching cycle. Switching resumes at the start of the next switching period. If the overcurrent condition persists, the device operates continuously in current limit. This prevents damage to the RT4832A and excessive current draw from the battery during output short-circuit conditions. When Flash occurs the current Limit event, the FLASH_OCP flag (register 0x10 bit [1]) is set. Over-Temperature Protection The RT4832A provides an over-temperature protection to prevent the IC from overheating. When the junction temperature rises above 145 C, the OTP function will |
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