Datenblatt-Suchmaschine für elektronische Bauteile |
|
S-19214 Datenblatt(PDF) 21 Page - ABLIC Inc. |
|
S-19214 Datenblatt(HTML) 21 Page - ABLIC Inc. |
21 / 46 page AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 1000 mA VOLTAGE REGULATOR Rev.1.1_00 S-19214 Series 21 6. Overcurrent protection circuit The S-19214 Series has a built-in overcurrent protection circuit to limit the overcurrent of the output transistor. When the VOUT pin is shorted to the VSS pin, that is, at the time of the output short-circuit, the output current is limited to 250 mA typ. due to the overcurrent protection circuit operation. The S-19214 Series restarts regulating when the output transistor is released from the overcurrent status. Caution This overcurrent protection circuit does not work as for thermal protection. For example, when the output transistor keeps the overcurrent status long at the time of output short-circuit or due to other reasons, pay attention to the conditions of the input voltage and the load current so as not to exceed the power dissipation. 7. Thermal shutdown circuit The S-19214 Series has a built-in thermal shutdown circuit to limit overheating. When the junction temperature increases to 170 °C typ., the thermal shutdown circuit becomes the detection status, and the regulating is stopped. When the junction temperature decreases to 135 °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 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 13 Thermal Shutdown Circuit VOUT Pin Voltage Release: 135 °C typ.*1 Constant value*2 Detection: 170 °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. 8. Inrush current limit circuit The S-19214 Series has a built-in inrush current limit circuit to limit the inrush current generated at power-on or at the time when the ON / OFF pin is set to ON. The inrush current is limited to 400 mA typ. immediately after power-on or for the internally set, predetermined time of 100 μs min. from the time when ON / OFF pin is set to ON. |
Ähnliche Teilenummer - S-19214 |
|
Ähnliche Beschreibung - S-19214 |
|
|
Link URL |
Privatsphäre und Datenschutz |
ALLDATASHEETDE.COM |
War ALLDATASHEET hilfreich? [ DONATE ] |
Über Alldatasheet | Werbung | Kontakt | Privatsphäre und Datenschutz | Linktausch | Hersteller All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |