Electronic Components Datasheet Search |
|
APL3208A Datasheet(PDF) 9 Page - Anpec Electronics Coropration |
|
APL3208A Datasheet(HTML) 9 Page - Anpec Electronics Coropration |
9 / 17 page Copyright © ANPEC Electronics Corp. Rev. A.2 - Nov., 2009 APL3208A/B/C www.anpec.com.tw 9 Function Description ACIN Power-On-Reset (POR) The APL3208A/B/C has a built-in power-on-reset circuit to keep the output shutting off until internal circuitry is operating properly. The POR circuit has hysteresis and a de-glitch feature so that it will typically ignore undershoot transients on the input. When the input voltage exceeds the POR threshold and after 8ms blanking time, the out- put voltage starts a soft-start to reduce the inrush current. ACIN Over-Voltage Protection (OVP) The input voltage is monitored by the internal OVP circuit. When the input voltage rises above the input OVP threshold, the internal FET will be turned off within 1ms to protect the connected system on OUT pin. When the in- put voltage returns below the input OVP threshold minus the hysteresis, the FET is turned on again after 8ms re- covery time. The input OVP circuit has a 200mV hyster- esis and a recovery time of T ON(OVP) to provide noise im- munity against transient conditions. Battery Over-Voltage Protection The APL3208A/B/C monitors the VBAT pin voltage for bat- tery over-voltage protection. The battery OVP threshold is internally set to 4.35V. When the VBAT pin voltage ex- ceeds the battery OVP threshold for a blanking time of T B (BOVP), the internal power FET is turned off. When the VBAT voltage returns below the battery OVP threshold minus the hysteresis, the FET is turned on again. The APL3208A/ B/C has a built-in counter. When the total count of battery OVP fault reaches 16, the FET is turned off permanently, requiring a V ACIN POR again to restart. Over-Temperature Protection When the junction temperature exceeds 160oC, the inter- nal thermal sense circuit turns off the power FET and allows the device to cool down. When the device’s junc- tion temperature cools by 40oC, the internal thermal sense circuit will enable the device, resulting in a pulsed output during continuous thermal protection. Thermal pro- tection is designed to protect the IC in the event of over temperature conditions. For normal operation, the junc- tion temperature cannot exceed T J=+125 oC. Internal P-MOSFET The APL3208A/B/C integrates a P-channel MOSFET with the body diode reverse protection to replace the external power bipolar transistor and Schottky diode for the Infineon ULC2 mobile. The body diode reverse protection pre- vents a reverse current flowing from the battery back to the CHG_DET pin. During power-on, when CHG_DET voltage rises above the VBAT voltage by more than 120mV, the body diode of the P-channel MOSFET is for- ward biased from OUT to CHG_DET, and P-MOSFET is controlled by the external CHG_SW voltage. When the CHG_DET voltage drops below V BAT+20mV, the body di- ode of the P-channel MOSFET is forward biased from CHG_DET to OUT and P-channel MOSFET is turned off. When any of input OVP, battery OVP, is detected,the inter- nal P-channel MOSFET is also turned off. Current-Limit Protection The APL3208A/B/C provides a current-limit protection function. When the current via the internal switch sur- passes the current limit threshold, the current will be clamped to a constant level to provide external battery charging current. |
Similar Part No. - APL3208A |
|
Similar Description - APL3208A |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List 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 |