EUP8209-8.4 Datasheet | Eutech Microelectronics

EUP8209-4.2/8.4/8.4A Switch Mode Li-Ion/Polymer Battery Charger DESCRIPTION The EUP8209 is a constant current, constant voltage Li-Ion battery charger controller that uses a current mode PWM step-down (buck) switching architecture. With a 500k Hz switching frequency, the EUP8209 provides a small, simple and efficient solution to fast charge one (4.2V) or two (8.4V) cell lithium-ion batteries. The EUP8209 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 parator detects the near end-of-charge condition while an internal timer sets the total charge time and terminates the charge cycle. The EUP8209 automatically re-starts the charge if the battery voltage falls below an internal threshold, 4.05V per cell. The EUP8209 also automatically enters sleep mode when DC supplies are removed. The EUP8209 is available in the 8-lead SOP package. 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 500k Hz Switching Frequency End-of-Charge Current Detection Output 12 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 Package Ro HS pliant and 100% Lead (Pb)-Free Halogen-Free APPLICATIONS Small Notebook puter Portable DVD Handheld Instruments Efficiency vs Input voltage Typical Operating Performance Efficiency vs Input voltage (Curves include input diode) 95 90 (Curves include input diode) 95 90 EFFICIENCY(%) EFFICIENCY(%) 85 80 75 70 65 60 8 10 12 14...