전자부품 데이터시트 검색엔진 |
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S-19212D50A-U5T1U 데이터시트(PDF) 17 Page - ABLIC Inc. |
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S-19212D50A-U5T1U 데이터시트(HTML) 17 Page - ABLIC Inc. |
17 / 60 page AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 250 mA VOLTAGE REGULATOR Rev.5.3_00 S-19212B/DxxA Series 17 6. Thermal shutdown circuit The S-19212B/DxxA Series has a built-in thermal shutdown circuit to limit overheating. When the junction temperature increases to 165 °C typ., the thermal shutdown circuit becomes the detection status, and the regulating is stopped. When the junction temperature decreases to 140 °C typ., the thermal shutdown circuit becomes the release status, and the regulator is restarted. If the thermal shutdown circuit becomes the detection status due to self-heating, the regulating is stopped and VOUT decreases. For this reason, the self-heating is limited and the temperature of the IC decreases. The thermal shutdown circuit becomes release status when the temperature of the IC decreases, and the regulating is restarted, thus the self-heating is generated again. Repeating this procedure makes the waveform of VOUT into a pulse-like form. This phenomenon continues unless decreasing either or both of the input voltage and the output current in order to reduce the internal power consumption, or decreasing the ambient temperature. Note that the product may suffer physical damage such as deterioration if the above phenomenon occurs continuously. Caution 1. When the heat radiation of the application is not in a good condition, the self-heating cannot be limited immediately, and the IC may suffer physical damage. Perform thorough evaluation including the temperature characteristics with an actual application to confirm no problems happen. 2. If a large load current flows during the restart process of regulating after the thermal shutdown circuit changes to the release status from the detection status, the thermal shutdown circuit becomes the detection status again due to self-heating, and a problem may happen in the restart of regulating. A large load current, for example, occurs when charging to the CL whose capacitance is large. Perform thorough evaluation including the temperature characteristics with an actual application to select CL. Table 15 Thermal Shutdown Circuit VOUT Pin Voltage Release: 140 °C typ.*1 Constant value*2 Detection: 165 °C typ.*1 Pulled down to VSS*3 *1. Junction temperature *2. The constant value is output due to the regulating based on the set output voltage value. *3. The VOUT pin voltage is pulled down to VSS due to the feedback resistors (Rs and Rf) and a load. |
유사한 부품 번호 - S-19212D50A-U5T1U |
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유사한 설명 - S-19212D50A-U5T1U |
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