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Eutech Microelectronics

EUP8202-8.4A Datasheet Preview

EUP8202-8.4A Datasheet

Switch Mode Li-Ion/Polymer Battery Charger

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EUP8202-4.2/8.4/8.4A
Switch Mode Li-Ion/Polymer
Battery Charger
DESCRIPTION
The EUP8202 is a constant current, constant voltage
Li-Ion battery charger controller that uses a current mode
PWM step-down (buck) switching architecture. With a
500kHz switching frequency, the EUP8202 provides a
small, simple and efficient solution to fast charge one
(4.2V) or two (8.4V) cell lithium-ion batteries.
The EUP8202 charges the battery in three phases:
conditioning, constant current, and constant voltage. An
external sense resistor sets the charge current with ±10%
accuracy. An internal resistor divider and precision
reference set the final float voltage to 4.2V per cell with ±
1% accuracy. An internal comparator detects the near
end-of-charge condition while an internal timer sets the
total charge time and terminates the charge cycle. The
EUP8202 automatically re-starts the charge if the battery
voltage falls below an internal threshold, 4.05V per cell.
The EUP8202 also automatically enters sleep mode when
DC supplies are removed.
The EUP8202 is available in the 8-lead SOP and 10-lead
TDFN packages.
FEATURES
Wide Input Supply Voltage Range:
4.8V to 20V – 4.2 Version
8.9V to 20V – 8.4 Version
8.9V to 20V – 8.4A Version
500kHz Switching Frequency
End-of-Charge Current Detection Output
3 Hour Charge Termination Timer
±1% Charge Voltage Accuracy
±10% Charge Current Accuracy
Low 10µA Reverse Battery Drain Current
Automatic Battery Recharge
Automatic Trickle Charging of Low Voltage
Batteries
Automatic Sleep Mode for Low Power
Consumption
Battery Temperature Sensing
Stable with Ceramic Output Capacitor
Support up to 3A Charge Current
8-Lead SOP and 10-Lead TDFN Packages
RoHS Compliant and 100% Lead (Pb)-Free
Halogen-Free
Typical Operating Performance
APPLICATIONS
Small Notebook Computer
Portable DVD
Handheld Instruments
Efficiency vs Input voltage
100
(Curves include input diode)
95
90
85
80
75
70 EUP8202-8.4
VBAT=7.0V
65 VBAT=8.0V
60
8
10 12 14 16 18
Input Voltage (V)
20
Efficiency vs Input voltage
100
(Curves include input diode)
95
90
85
80
75
70
EUP8202-4.2
65 VBAT=3.8V
VBAT=4.0V
60
5
10 15
Input Voltage (V)
20
DS8202 Ver 1.3 May 2012
1




Eutech Microelectronics

EUP8202-8.4A Datasheet Preview

EUP8202-8.4A Datasheet

Switch Mode Li-Ion/Polymer Battery Charger

No Preview Available !

Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
Typical Application Circuit
EUP8202-4.2/8.4/8.4A
Figure 1. 1.5A Single Cell/2.0A Dual Cells Li-Ion Battery Charger
DS8202 Ver 1.3 May 2012
2


Part Number EUP8202-8.4A
Description Switch Mode Li-Ion/Polymer Battery Charger
Maker Eutech Microelectronics
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EUP8202-8.4A Datasheet PDF






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