FBC4067YSOT236G/TR

FBC4067 is a single-cell lithium-ion battery CC/CV linear charger with an input voltage rating up to 30V and OVP functionality. Its simple external application circuit makes it ideal for portable device applications, supporting both USB power and adapter power operation. The FBC4067 adopts an internally integrated PMOSFET architecture with a reverse-charge prevention circuit, eliminating the need for an external blocking diode. Thermal feedback automatically adjusts the charge current to limit the die temperature during high-power operation or high ambient temperature conditions. The FBC4067 has a charge termination voltage of 4.2V, and the charge current can be set via an external resistor. When the charge current drops to 1/5 of the programmed value, the FBC4067 automatically terminates the charging process. The FBC4067 is a linear charger designed specifically for single-cell lithium-ion or lithium polymer batteries. With an integrated power transistor, the charge current can be set using an external resistor, with a maximum continuous charge current of up to 500mA, requiring no additional blocking diode or current sense resistor. The FBC4067 includes an open-drain status indicator pin to indicate charging in progress or charge completion. During charging, the CHRG pin is pulled low to indicate that charging is in progress; upon charge completion, the CHRG pin enters a high-impedance state. The STDBY charge completion status indicator pin is pulled low when charging ends, illuminating the charge completion LED. This LED remains off during the charging process. If the battery voltage falls below 2.9V, the FBC4067 precharges the battery with a small current. When the battery voltage exceeds 2.9V, the device charges the battery in CC mode, with the charge current determined by the resistor RPROG connected between the PROG pin and GND. As the battery voltage approaches 4.2V, the charge current gradually decreases and the FBC4067 enters CV charging mode. The charging cycle ends when the charge current decreases to the end-of-charge threshold, which is 20% of the CC charge current. The intelligent thermal control circuit inside the FBC4067 automatically reduces the charge current when the die junction temperature exceeds 130°C. This feature allows users to maximize the power handling capability of the device without concern for damage to the IC or external components due to overheating. As a result, users do not need to design for worst-case charge current conditions — designing for the typical case is sufficient, as the FBC4067 will automatically reduce the charge current under worst-case conditions.

Applications

• Charging dock
• Bluetooth headsets, GPS
• Mobile phones, PDA, MP3/MP4
• Digital cameras, mini speakers, and other portable devices

Key features

• Maximum input voltage: 30V
• Full charge voltage: 4.2V
• Overvoltage protection voltage: 7.3V
• Maximum charge current: 500mA
• Trickle/constant current/constant voltage three-stage charging
• No MOSFET, sense resistor, or blocking diode required
• Intelligent thermal regulation for maximum charge rate optimization
• Intelligent recharge function
• BAT input reverse polarity protection
• Standby mode quiescent current: 1.2μA
• C/5 charge termination
• 2.9V trickle charge threshold
• Charge status indication
• Package: SOT23-6L
• When input voltage is removed, FBC4067 automatically enters low-current sleep state with current dropping to 0