Electronic Components Datasheet Search |
|
bq24350DSGR Datasheet(PDF) 7 Page - Texas Instruments |
|
|
bq24350DSGR Datasheet(HTML) 7 Page - Texas Instruments |
7 / 17 page VBAT 2V/div VACIN=5V,VBAT =3.4Vto5V CHGIN2V/div I 0.5 A/div ACIN Time:2mS/div 0.1 1 10 100 1000 10000 0 1000 2000 3000 4000 5000 Vgs-Vchgin-Vgatdrv-mV Q2 VCHGIN=5V, V -V =200mV CHGIN OUT 100 150 200 250 300 350 400 450 500 550 600 -50 0 50 100 150 T -JunctionTemperature-°C J Q1+Q2 Q1 Q2 BACKGROUND DETAILED FUNCTIONAL DESCRIPTION bq24350 bq24352 www.ti.com ............................................................................................................................................................... SLUS943A – MAY 2009 – REVISED JUNE 2009 TYPICAL PERFORMANCE CHARACTERISTICS (continued) BATTERY OVP Rdson vs Vgs Figure 10. Figure 11. FET ON RESISTANCE vs TEMPERATURE Figure 12. During the charging process for portable devices, input voltage spikes usually happen when the AC/DC adaptor is plugged in, or charge current is cut off quickly under fault conditions, such as input OVP, OCP or battery OVP and so on. The over voltage stress may damage the analog baseband chip which has lower voltage rating due to its increased complexity. Therefore, over voltage protection is needed for the safe operation of portable devices. Another challenge arises from the charge circuit that uses external charging FET in series with a reverse blocking diode as the charging device. The battery may not be fully charged when input voltage is low due to the additional diode voltage drop. bq24350/2 will provide the solution for above problems since it has input OVP, OCP, battery OVP function, together with integrated charging FET which will eliminate the reverse blocking diode in the previously mentioned charge circuit, as shown in Figure 1. The bq24350/2 is a highly integrated circuit designed to provide protection to Li-ion batteries from failures of the charging circuit. The IC continuously monitors the input voltage and the battery voltage. In case of an input over-voltage condition, the IC will turn off the internal power FET after a blanking time. If the battery voltage rises to unsafe levels during charging process, power is removed from the system. If the input current exceeds the over current threshold for a limited time, the IC will turn off the output power. The integrated charging FET can regulate the charge voltage and current according to the control from the host. The device can also provide a voltage source with over voltage and over current protection for host controller. Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Link(s): bq24350 bq24352 |
Similar Part No. - bq24350DSGR |
|
Similar Description - bq24350DSGR |
|
|
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 |