 |
поискавой системы для электроныых деталей |
|
|
поискавой системы для электроныых деталей |
|
TPS658620ZQZT датащи(PDF) 41 Page - Texas Instruments |
|
|
|||||||||||||||||||||||||||||
TPS658620ZQZT датащи(HTML) 41 Page - Texas Instruments |
|
|
41 / 104 page  3.24 SUPPLEMENT MODE DETECTION 3.25 SHORT CIRCUIT DETECTION 3.26 DPPM FUNCTION 3.27 BATTERY DETECTION, TEMPERATURE QUALIFICATION 3.28 BATTERY PRE-CONDITIONING PRECHG O(PRECHG) ISET K I = R (3-1) 3.29 CONSTANT CURRENT CHARGING SET O(BAT) ISET K I = R (3-2) TPS658620 Advanced Power Management Unit www.ti.com SLVS993 – OCTOBER 2009 The TPS658620 charger does not have a supplement mode. The charger power mosfet will NOT turn on when the charger is disabled and V(VIN_CHG) < V(BAT). The BAT pin is monitored for a short circuit condition. If V(BAT) < VSH(BAT) , the BATCHG switch is turned OFF and an internal resistor is connected from VIN_CHG pin to BAT pin. Internal circuits monitor the voltage at the SYS pin and reduce the charge current when V(SYS) < VSYS(DPPM). This function assures that the external power is used to run the system. The threshold VSYS(DPPM) can be programmed using the I 2C bits SYSDPPM<1:0> in register CHG3. Battery pack insertion and battery pack temperature are detected by three comparators that monitor the thermistor voltage. The thermistor supply is enabled via I2C when control bit TSON=HI in register CHG1. This control bit enables the host software to turn on the thermistor bias when the charger is off and the pack temperature needs to be measured via the ADC, minimizing system quiescent current when operating under battery power. When the charger is activated, the thermistor power is enabled independent of the state of bit TSON. The host software must disable the charger by setting bit CHGON(1)=0 when the battery pack removal is detected by the TPS658620. This procedure is required in order to avoid undesired transients when a battery pack is hot-plugged in the system. The TPS658620 applies a pre-charge current Io(PRECHG) to the battery if the battery voltage is below the VLOWBAT threshold, pre-conditioning deeply discharged cells. The resistor, RISET, connected between the ISET and AGND pins, determines the pre-charge rate. The pre-charge rate programmed by RISET is always applied to a deeply discharged battery pack, independent of the input power selection (AC or USB). The pre-charge current can be calculated as shown in Equation 3-1: where KPRECHG is the pre-charge current scaling factor in AΩ. The pre-charge current is set by the resistor on the ISET pin and can be scaled via I2C register CHG3 bits IPCH_1, IPCH_0 to a percentage (20%, 15%, 10%, or 4%) of the value set by RISET. The pre-charge voltage is selectable via bit VPCHG, register CHG2. The constant charge current mode (fast charge) is set when the battery voltage is higher than the pre-charge voltage threshold. The fast charge current regulation point is defined by the external resistor, RISET, connected to the ISET pin as shown in Equation 3-2. where KSET is the charge current scaling factor in AΩ. The charge current is set by the resistor on the ISET pin and can be scaled via I2C register CHG1 bits ISET1[1:0] to a percentage (100%, 75%, 50% or 25%) of the value set by RISET. Submit Documentation Feedback DETAILED DESCRIPTION 41 |
Аналогичный номер детали - TPS658620ZQZT |
|
Аналогичное описание - TPS658620ZQZT |
|
|
ссылки URL |
| Конфиденциальность |
| ALLDATASHEETRU.COM |
| Вашему бизинису помогли Аллдатащит? [ DONATE ] |
Что такое Аллдатащит | реклама | контакт | Конфиденциальность | обмен ссыками | поиск по производителю 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 |
Russian ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
