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5A Single Cell Li-Ion Switching Battery Charger wi
资料介绍
5A Single Cell Li-Ion Switching Battery Charger with Power
Path Management and USB-OTG Boost Mode
General Description:
The RT9467 is a switch-mode single cell Li-Ion/Li-Polymer
battery charger for portable applications. It integrates a
synchronous PWM controller, power MOSFETs, input
current sensing and regulation, high-accuracy voltage
regulation, and charge termination. The charge current is
regulated through integrated sensing resistors. The
RT9467 also features USB On-The-Go (OTG) support.
RT9467 integrates D+/D- pin for USB host/charging port
detection.
The RT9467 optimizes for charging task by using a control
algorithm to vary the charge rate for different modes,
including pre-charge mode, fast charge mode (constant
voltage and constant current). The key charge parameters
are programmable through an I2C interface. The RT9467
will resume the charge cycle whenever the battery voltage
falls below an internal recharge threshold, and can
automatically enter sleep mode if the input power supply
is removed.
Other features include under-voltage protection, over
voltage protection, thermal regulation and reverse leakage
protection.
The RT9467 is available in a WQFN-24L 4x4 package
Applications:
Cellular Telephones
Personal Information Appliances
Tablet PC, Power Bank
Portable Instruments
Features:
High Efficiency 5A, 1.5MHz Switching Charger with
Output Inductor DFE252012F, TOKO
Charging Efficiency 90.25% at ICHG = 2A
Charging Efficiency 88.86% at ICHG = 3A
Charging Efficiency 84.2% at ICHG = 5A
Synchronous 1.5MHz/0.75MHz Fixed-Frequency
PWM Controller with Up to 95% Duty Cycle
Power Path Management by BATFET Control
Support High Voltage Input (9V/12V)
Support High Voltage Input Adapter (Pump Express
1.0/2.0)
Support IR Compensation Function from Charger
Output to Cell Terminal
Optimize Input Sourcing Capability to Prevent
Overload
AICR Current Limit Setting via I2C
ILIM Pin for Current Limit Setting
Average Input Current Limit Measurement
Shipping Mode for Battery Leakage Reduction
Wake Up System, Exit Shipping Mode, and Reset
System by QON Pin
Automatic Charging
Average Input Current Regulation (AICR) :
0.1A to 3.25A in 50mA Steps
Charge Current Regulation Accuracy : ±7%
Charge Voltage Regulation Accuracy : ±1% (0 to
85°C)
Protection for Overall System Considerations
Thermal Regulation for Current Reduction and
Over-Temperature Protection
Input Over-Voltage Protection
Input Bad Adapter Protection
Battery Over-Voltage Protection
Support ADC Conversion for
VBUS, VBAT, VSYS, REGN, TS_BAT, IBUS, IBAT,
TEMP_JC
INT Output for Communication with Host Through
I2C (Watch Dog / Polling Function)
部分文件列表
文件名 | 大小 |
RT9467_5ASingleCell_Li-lon_SwitchBatteryChargerWithPower.pdf | 477K |
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