 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
LTC4413-2 Datasheet(PDF) 11 Page - Linear Technology |
|
||||||||||||||||||||||||||||||
LTC4413-2 Datasheet(HTML) 11 Page - Linear Technology |
|
|
11 / 16 page  LTC4413-1/LTC4413-2 11 441312fd APPLICATIONS INFORMATION Introduction The LTC4413-1/LTC4413-2 are intended for power control applications that include low loss diode OR’ing, fully auto- matic switchover from a primary to an auxiliary source of power, microcontroller controlled switchover from a pri- mary to an auxiliary source of power, load sharing between two or more batteries, charging of multiple batteries from a single charger and high side power switching. Dual Battery Load Sharing with Automatic Switchover to a Wall Adapter with Overvoltage Protection (LTC4413-2 Only) An application circuit for dual battery load sharing with automatic switchover of load from batteries to a wall adapter is shown in Figure 2. When the wall adapter is not present, whichever battery has the higher voltage provides the load current until it has discharged to the voltage of the other battery. The load is shared between the two batter- ies according to the capacity of each battery. The higher capacity battery provides proportionally higher current to the load. When a wall adapter input is applied, the output voltage rises as the body diode in MP2 conducts. When the output voltage is larger than the battery voltages, the LTC4413 turns off and very little load current is drawn from the batteries. At this time, the STAT pin pulls down the gate voltage of MP2, causing it to conduct. This status signal can be used to provide information as to whether the wall adapter (or BATB) is supplying the load current. If the wall adapter voltage exceeds the OVI trip threshold (VOVIH) then the wall adapter is disconnected via the external PFET, MP1. The OVI voltage can be monitored (through a voltage divider if necessary) to determine if an overvoltage condition is present. Capacitor C2 is required to dynamically pull up on the gate of PFET MP1 if a fast edge occurs at the wall adapter input during a hot plug. In the event that capacitor C2 (or the gate-to-source of MP1) is precharged below the OVI rising threshold. When a high voltage spike occurs, the OVP output cannot guarantee turning off MP1 before the load voltage exceeds the absolute maximum voltage for the LTC4413-2. This may occur in the event that the wall adapter suddenly steps from 5.5V to a much higher value. In this case, a Zener diode is recommended to keep the output voltage to a safe level. Automatic PowerPath Control Figure 3 illustrates an application circuit for microcon- troller monitoring and control of two power sources. The microcontroller’s analog inputs (perhaps with the aid of a resistor voltage divider) monitor each supply input and the LTC4413-1 status, and then commands the LTC4413-1 through the two ENBA/ENBB control inputs. INA IDEAL MP1 IRLML6402 MP2 IRLML6402 LTC4413-2 INB IDEAL BATB ENBA C1: C1206C106K8PAC C2: C0403C103K8PAC COUT: C1206C475K8PAC GND ENBB OUTA 1 3 4 5 2 10 8 7 6 9 OUTB STAT COUT 4.7μF C2 10nF OPTIONAL 6.2V DFLZ6V2-7 441312 F02 STAT RSTAT 470k OVP TO LOAD OVI OVP + BATA 10nF C1 0.10μF WALL ADAPTER INPUT JACK R1 1Ω + INA IDEAL LTC4413-1 INB IDEAL ENBA GND ENBB OUTA OUTB STAT STAT 441312 F03 LOAD 1 2 3 4 5 10 9 6 CA 10μF PRIMARY POWER SOURCE AUXILIARY POWER SOURCE RA 1Ω RSTAT 470k CB 10μF C1 4.7μF RB 1Ω MICROCONTROLLER Figure 2 Figure 3 |
Similar Part No. - LTC4413-2_15 |
|
Similar Description - LTC4413-2_15 |
|
|
|
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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
