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BQ24765 Datasheet(PDF) 2 Page - Texas Instruments |
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BQ24765 Datasheet(HTML) 2 Page - Texas Instruments |
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2 / 37 page  RAC 0.010 RSR 0.010 Q1 (ACFET) SI4435 P P CSSN CSSP ACIN VREF CE SDA SCL SMBus DISCRETE LOGIC VICM HOST (EC) DCINP BOOT VDDP PGND CSOP CSON PACK + PACK - CHRG_IN ADAPTER + ADAPTER - AGND bq24765 464k 1% 33.2k 1% R1 R2 1uF C4 0.1uF C2 0.1uF C3 100pF C5 0.47uF C6 0.1uF C7 L1 3.3uH D1 BAT54 1uF C8 C9 0.1uF C10 0.1uF C12 10uF C18 10uF VFB ICOUT C11 10uF Q2 (ACFET) SI4435 Controlled byHOST 10uF C17 C13 0.1u R4 10k R5 10k EAI FBO EAO R9 20k R10 200k R8 7.5k C15 2000pF C16 130pF VDDSMB ACOK 10k R3 DISCRETE LOGIC DigI/O R7 10k C14 51pF DCINP DCINP DCINA PHASE PHASE PHASE PGND PGND Q3 (BATFET) SI4435 Controlled byHOST QTOP QBOT 2.2uF C1 Rc1 2 R7 5.6 PHASE PHASE PGND 20 RC6 ICREF RC1 100k RC2 20k R6 10k bq24765 SLUS999 – NOVEMBER 2009 www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. DESCRIPTION (CONTINUED) The bq24765 features Dynamic Power Management (DPM) and input power limiting. These features reduce battery charge current when the input power limit is reached to avoid overloading the AC adaptor when supplying the load and the battery charger simultaneously. A high-accuracy current sense amplifier enables accurate measurement of input current from the AC adapter, allowing monitoring the overall system power. If the adapter current is above the programmed low-power threshold, a signal is sent to host so that the system optimizes its power performance according to what is available from the adapter. An integrated comparator allows monitoring the input current through the current sense amplifier, and indicating when the input current exceeds a programmable threshold limit. The bq24765 features a thermal regulation loop to reduce battery charge current when the Tj limit is reached. This feature protects internal power FETs from overheating when charging with high current. TYPICAL APPLICATIONS VIN = 20 V, VBAT = 4-cell Li-Ion, ICHARGE = 4.5 A, Idpm = 5A Figure 1. Typical System Schematic, Using Internal Input Current Comparator 2 Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s) :bq24765 |
Similar Part No. - BQ24765_15 |
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Similar Description - BQ24765_15 |
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