BQ24707A BQ07A QFN 20 PIN
DESCRIPTION
The bq24707 and bq24707A are high-efficiency, synchronous battery charger, offering low component count for space-constraint, multi-chemistry battery charging applications. SMBus controlled input current, charge current, and charge voltage DACs allow for very high regulation accuracies that can be easily programmed by the system power management micro-controller. The IC uses the internal input current register or external ILIM pin to throttle down PWM modulation to reduce the charge current. The IC provides an IFAULT output to alarm if any MOSFET fault or input over current occurs. This alarm output allows users to turn off input power selectors when the fault occurs. Meanwhile, an independent comparator with internal reference is available to monitor input current, output current, or output voltage. The IC charges one, two, three, or four series Li+ cells, and is available 3.5×3.5 mm2 QFN package.
APPLICATIONS
Portable Notebook Computers, UMPC, Ultra-Thin Notebook, and Netbook Personal Digital Assistant Handheld Terminal Industrial and Medical Equipment Portable Equipment
C3 0.1µF ACN VCC Controlled By Host C6 1µF REGN ILIM BTST 10uF Q5 (BATFET) C5 1µF Total Csys 220µF
= 750kHz, Iadpt = 4.096A, Ichrg = 2.944A, Ilim = 4A, Vchrg 12.592V, 90W adapter and 3S2P battery pack See the application information about negative output voltage protection for hard shorts on battery to ground or battery reverse connection.
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توضیحات
BQ24707A BQ07A QFN 20 PIN IC
BQ24707A 1-4 Cell Li+ Battery SMBus Charge Controller With Independent Comparator and Advanced Circuit Prot.
FEATURES
SMBus Host-Controlled NMOS-NMOS Synchronous Buck Converter with Programmable 615kHz, 750kHz, and 885kHz Switching Frequency Real Time System Control on ILIM Pin to Limit Charge Current Enhanced Safety Features for Over Voltage Protection, Over Current Protection, Battery, Inductor, and MOSFET Short Circuit Protection Programmable Input Current, Charge Voltage, Charge Current Limits ±0.5% Charge Voltage Accuracy ±3% Charge Current Accuracy ±3% Input Current Accuracy ±2% 20x Adapter Current or Charge Current Output Accuracy Programmable Adapter Detection and Indicator Independent Comparator with Internal Reference Integrated Soft Start Integrated Loop Compensation AC Adapter Operating Range 5V-24V 15µA Off-State Battery Discharge Current 3.5 mm2 QFN Package bq24707: ACOK delay default 1.3s bq24707A: ACOK delay default 1.2ms
توضیحات تکمیلی
| Package |
QFN-20 |
|---|---|
| کیفیت |
original |
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دیدگاهها
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