Zakładka z wyszukiwarką danych komponentów |
|
TS51111 Arkusz danych(PDF) 11 Page - Semtech Corporation |
|
TS51111 Arkusz danych(HTML) 11 Page - Semtech Corporation |
11 / 22 page TS51111 Final Datasheet Rev 2.2 April 17, 2015 www.semtech.com 11 of 22 Semtech Proprietary & Confidential Functional Description (continued) The load switch can be reconfigured to operate as a linear regulator (see Charge Termination section below). When enabled, the output will soft-start to limit inrush current. In linear regulation mode, the PDC voltage must be regulated close to the dropout voltage to limit power dissipation in the IC. In linear regulation mode, a configurable, integrated current limit circuit provides fault protection to the system. At the maximum setting, current limit is disabled. If the output current hits the current limit threshold, the device will automatically limit the output current and set the FAULT register ILIM bit. In this condition, the PDC voltage will build up and must be managed through the system loop by reducing the transmitted power. If the transmitted power is not reduced, the TS51111 power dissipation will increase and eventually force a thermal shutdown of the part. Current limit in direct charge mode is not integrated but can be easily implemented by monitoring device output current using the integrated current sense amplifiers. ILIMSET<3:0> Current Limit Typical (mA) 0000 350 0001 600 0010 850 0011 1100 0100 1350 0101 1600 0110 1850 0111 2100 1000 2350 1001 2600 1010 2850 1011 3100 1100 3350 1101 3600 1110 3850 1111 Disable ILIM Precharge In low battery conditions, an integrated precharge current source can be used to slowly charge the battery with a controlled DC current source. The precharge current source is controlled using the I2C interface. The precharge current has a negative temperature coefficient to mitigate temperature rise of the TS51111 during pre-charge. The level of the Precharge current can be set according to the table below. PRESET<2:0> Precharge Current (mA) 000 30 001 40 010 50 011 60 100 70 101 80 110 90 111 100 Low Power Mode The TS51111 supports a low-power mode when connected directly to a battery. In this mode, the ultra-low quiescent current LDO output is enabled to power an external microcontroller and the power consumption of the rest of the IC is minimized. In this mode, the TS51111 still supports UART level translation to the microcontroller. The part will automatically switch to normal operation when incoming power is detected. Current Sense Amps Two current sense amplifiers are included to allow for accurate battery charge current and received current measurements. The IBSENSE amplifier provides an output that is proportional to the sense voltage on the PACKN pin when a sense resistor is placed between PACKN and ground. The IOSENSE amplifier will measure the differential voltage across the sense resistor placed in series with the output current. This measurement is an indicator of the power received by the TS51111. The IOSENSE output is not valid when the device is in current limit. The system should check the FAULT register periodically to ensure the device is in a proper operating state without any faults. Both amplifiers have a configurable gain set by the ISET register. The gains are configurable from 10x to 80x. |
Podobny numer części - TS51111 |
|
Podobny opis - TS51111 |
|
|
Link URL |
Polityka prywatności |
ALLDATASHEET.PL |
Czy Alldatasheet okazała się pomocna? [ DONATE ] |
O Alldatasheet | Reklama | Kontakt | Polityka prywatności | Linki | Lista producentów 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 |