Diodes APM8601 User Manual
Apm8601
APM8601
DUAL CHANNEL SINGLE CELL LINEAR LITHIUM BATTERY
CHARGER WITH 28V OVP and PROGRAMMABLE CHARGE
TIMER
APM8601
Document number: DS35138 Rev. 1 - 2
1 of 14
December 2010
© Diodes Incorporated
NEW PROD
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Description
The APM8601 is a dual input channel linear Li-Ion charger for
portable equipment that is optimized for small form-factor
applications.
The charge algorithm in the APM8601 covers all the charge
requirements for a single Li-Ion battery cell. Included is
pre-charging for deeply discharged cells, constant current /
constant voltage fast charging and a top-off feature to bring
the cell safely to a full-charge level.
The battery is constantly monitored for overvoltage, charge
time and cell temperature to ensure safe charging. A fault is
triggered once the charge time exceeds a value that is
programmable using a single capacitor and the temperature
measurement is achieved through a thermistor positioned
close to the battery cell.
The APM8601 automatically selects the USB or DC input,
depending on which is valid (DC has priority if both are valid).
The charging current from the USB input is set to 100mA or
500mA based on the logic level of the USEL input.
The APM8601 is packaged in U-DFN3030-14 package with a
thermal pad.
Applications
• Handheld Consumer Devices
• Cell Phones, PDAs, MP3 Players
• Handheld
Test
Equipment
• Digital Still Cameras
• Multimedia
players
Pin Assignments
Figure 1. Pin Out
Features
• Linear Lithium Ion / Lithium Polymer charging IC
• Supply input safe up to 28V
• Fast charging with maximum current of 1A
• 100mA/500mA USB charge current selected with USEL
• Resistor-programmable charging current
• Resistor programmable end-of-charge
• Capacitor programmable charge timer
• Three charge indicator pins for a status display
• Thermal
protection
• DFN3030-14: Available in “Green” Molding Compound
(No Br, Sb)
• Lead Free Finish/ RoHS Compliant (Note 1)
Note 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions
applied. Please visit our website at
Typical Application Circuit
Figure 2. Typical Application Circuit