FBC4064YSOT235G/TR

FBC4064 is a single-cell lithium-ion battery CC/CV linear charger IC with an input voltage rating up to 30V and overvoltage protection (OVP). Its simple external application circuit makes it ideal for portable device applications, compatible with both USB power and adapter power sources. The internal integrated PMOSFET architecture incorporates an anti-reverse charging circuit, eliminating the need for an external blocking diode. Thermal feedback automatically adjusts the charge current to limit the junction temperature during high-power operation or elevated ambient temperature conditions. The charge termination voltage is 4.2V, and the charge current is set via an external resistor. Charging terminates automatically when the charge current drops to 1/5 of the programmed value. When the input voltage is removed, the device automatically enters a low-current sleep state, with current dropping to 0. FBC4064 is a linear charger designed specifically for single-cell lithium-ion or lithium polymer batteries. The IC integrates a power transistor, and the charge current can be set with an external resistor, with a maximum continuous charge current of up to 500 mA, requiring no additional blocking diode or current sense resistor. A drain-open status indicator output is included 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 transitions to a high-impedance state. If the battery voltage falls below 2.9V, the battery is pre-charged with a small current. When the battery voltage exceeds 2.9V, the device charges the battery in constant-current 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 device transitions into constant-voltage mode. The charge cycle ends when the charge current decreases to the charge termination threshold, which is 20% of the constant-current charge current. A new charge cycle begins automatically when the battery voltage drops below the recharge threshold of 4.05V. The high-precision internal voltage reference, error amplifier, and resistor divider network ensure the battery terminal regulation voltage accuracy is within 1%, meeting the requirements of lithium-ion and lithium polymer batteries. When the input voltage falls below the UVLO threshold or drops below the battery voltage, the charger enters a low-power shutdown mode, during which the current drawn from the battery terminal is less than 2µA. The internal intelligent thermal control circuit automatically reduces the charge current when the junction temperature exceeds 130°C. This feature allows users to maximize the power handling capability of the IC without concern for damage to the IC or external components due to overheating. As a result, users can design the charge current based on typical operating conditions rather than worst-case scenarios, since the charge current will be reduced automatically 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: 500 mA
• Trickle/constant current/constant voltage three-stage charging
• No MOSFET, sense resistor, or isolation 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: SOT23-5L