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AAT3680IKS-8.4-T1 Datasheet(PDF) 8 Page - Advanced Analogic Technologies |
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AAT3680IKS-8.4-T1 Datasheet(HTML) 8 Page - Advanced Analogic Technologies |
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8 / 18 page  AAT3680 Lithium-Ion Linear Battery Charge Controller 8 3680.2003.4.0.91 High Speed Data Reporting An optional system microcontroller interface can be enabled by pulling the T2X pin up to 4.5V to 5.5V during power-up sequence. The T2X pin should be pulled high with the use of a 100k Ω resistor. If the input supply to VP will not exceed 5.5V, then the T2X pin may be tied directly to VP through a 100k Ω resistor. Since this is a TTL level circuit, it may not be pulled higher than 5.5V without risk of damage to the device. When the high speed data report feature is enabled, the STAT output periods are sped up to 40µs, mak- ing the total status word 160µs in length. See Figure 3 below. An additional feature is the Output Status for Battery Not Detected state. When the AAT3680 senses there is no battery connected to the BAT pin, the STAT pin cycles for two periods, then remains off for two periods. When in High Speed Data Reporting, the AAT3680 will only trickle charge at the 2x trickle charge level. This is because the TX2 pin is pull high the enable the high speed data reporting. A status display LED may not be not be connected to the STAT pin when the high speed data reporting is being utilized. If both display modes are required, the display LED must be switched out the circuit before the T2X pin is pulled high. Failing to do so could cause problems with the high speed switching control circuits internal to the AAT3680. Figure 3: Microcontroller Interface Logic Output Sleep / Charge Complete Temp., OC, OV Fault Battery Conditioning Constant Current Mode Constant Voltage Mode HI / HI / HI / HI LO / LO / HI / HI LO / LO / LO / LO LO / HI / HI / HI LO / LO / LO / HI Charge Status Output Status STAT Level Figure 2: LED Display Output Sleep / Charge Complete Temp., OC, OV Fault Battery Conditioning Constant Current Mode Constant Voltage Mode off / off / off / off on / on / off / off on / on / on / on on / off / off / off on / on / on / off Charge Status Output Status LED Display on/off ON OFF ON OFF ON OFF ON OFF ON OFF on/off on/off on/off |
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