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Teilenummer | ACE4101 |
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Beschreibung | Li-ion Switching Charger IC | |
Hersteller | ACE Technology | |
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Gesamt 9 Seiten ACE4101
Max. 1.6A Li-ion Switching Charger IC
Description
The ACE4101 is a 1.6A Li‐Ion battery switching charger intended for 5V adapters. Low power
dissipation, an internal MOSFET and its compact package with minimum external components
requirement makes the ACE4101 ideal for portable applications. The ACE4101 includes complete charge
termination circuitry, automatic recharge and a ±1% 4.2V/4.35V float voltage.
External sense resistor and Reverse diode is not need. Build‐in thermal feedback mechanism regulates
the charge current to control the die temperature during high power operation or at elevated ambient
temperature.
Battery charge current, charge timeout and end-of‐charge indication parameters can program by
external components. Additional features include shorted cell detection and overvoltage protection.
Features
Very Low Power Dissipation
1.6A Maximum Charge Current
Standalone Capability with no Requirement of External MOSFET, Sense Resistor or Blocking Diode
Constant‐Current/Constant‐Voltage Operation with Thermal Regulation to Maximize Charge Rate
Without Risk of Overheating
Charges Single Cell Li‐Ion Batteries Directly from USB Port
Drainage Charge Current Thermal Regulation Status Outputs for LED or System Interface
Preset 4.2V/4.35V float Voltage with ±1% Accuracy
Automatic Recharge
Application
Cellular Telephones, PDA, MP3 Players
Charging Docks and Cradles
Handheld Battery‐Powered Devices
Handheld Computers
Typical Application
ACE4101
Device parameter should be select as typical application
VER 1.4 1
ACE4101
Max. 1.6A Li-ion Switching Charger IC
Detailed Description
General description
The ACE4101 is a constant current, constant voltage Li‐Ion battery switching charger controller. The
charge current is set by an external sense resistor (RISET) across the ISET and GND pins. The final
battery float voltage is internally set to 4.2V/4.35V per cell. For batteries like lithium‐ion that require
accurate final float voltage, the internal reference, voltage amplifier and the resistor divider provide
regulation with ±1% accuracy.
A charge cycle begins when the voltage at the VCC pin rises above the UVLO level and is 250mV or
more greater than the battery voltage. At the beginning of the charge cycle, if the battery voltage is less
than the trickle charge threshold, 2.9V for the 4.2 version, the charger goes into trickle charge mode. The
trickle charge current is internally set to 10% of the full‐scale current. The charge current is
programmable by setting the value of a precision resistor connected from the ISET pin to ground. The
charge current is 1000 times of the current out of the ISET pin. The program resistor and the charge
current are calculated using the following equations:
The charge current out of the BAT pin can be determined at any time by monitoring the ISET pin voltage
using the following equation:
VER 1.4 6
6 Page | ||
Seiten | Gesamt 9 Seiten | |
PDF Download | [ ACE4101 Schematic.PDF ] |
Teilenummer | Beschreibung | Hersteller |
ACE4101 | Li-ion Switching Charger IC | ACE Technology |
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