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LP3913 Datasheet(PDF) 26 Page - Texas Instruments |
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LP3913 Datasheet(HTML) 26 Page - Texas Instruments |
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26 / 70 page  PowerOff VBLA Vuvlo Vpor 2.1V 0.9V 2.4V (Typ.) 2.4-3.5V (factory programmable) 4.2V (Typ.) Vterm Active Standby Battery safety switch on/off threshold LP3913 SNVS489I – NOVEMBER 2006 – REVISED SEPTEMBER 2013 www.ti.com Figure 54. Voltage Threshold Levels Table 2. Power State Table Power Off Standby Active Charger Standby LDO1,2 Off Off On Off BUCK1,2 Off Off On Off BUCK3 Off Off On Off CHARGER Off Off On if Charger / USB On if Charger / USB Present Present A/D Converter Off Off On Off NRST Low Low High Low I2C interface Off Off On On Internal System Oscillator Off Off On On Battery Monitor Off On On On Current consumption <1 µA 10 µA (typ) See Electrical See Electrical Characteristics Characteristics Power-On-Reset The LP3913 is equipped with an internal Power-On-Reset (“POR”) circuit that will reset the logic when VDD < VPOR. This ensures that the logic is properly initialized when VDD rises above the minimum operating voltage of the Logic and the internal oscillator that clocks the Sequential Logic in the Control section. Thermal Shutdown and Thermal Alarm An internal temperature sensor monitors the junction temperature of the LP3913 and forcibly invokes standby mode in the unusual case when the junction temperature of the silicon exceeds the normal operating level due to excessive loads on all power regulators and the Li-ion charger and/or due to an abnormally high ambient temperature. The thermal Shutdown threshold is 160°C. The thermal shutdown is preceded by a Thermal alarm that generates an interrupt request if unmasked (see Interrupt Request generation). The temperature threshold for triggering the alarm is 115°C. NRST Pin The NRST pin is an open-drain output and is active low during Standby, Power Off and Charger Standby modes. The NRST timing is determined by a factory programmable counter. Control Registers The LP3913 contains 14 user programmable registers that configure the functionality of the individual modules inside the IC. Registers are programmed through an I2C interface and have default values that are invoked during an internal reset. Some of the default values can be tailored to the specific needs of the system designer (see APPLICATIONS INFORMATION). 26 Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LP3913 |
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