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TP4062
The TP4062 is a complete single-cell lithium-ion battery charger with reverse polarity protection, featuring a higher charging current of 500mA and more stable current consistency. It uses constant current/constant voltage linear control. The SOT23-6 package and fewer external components make the TP4062 ideal for portable applications. The TP4062 uses an internal PMOSFET architecture and a reverse charge protection circuit, eliminating the need for external detection resistors and isolation diodes. Thermal feedback automatically adjusts the charging current to limit chip temperature during high-power operation or high ambient temperatures. The full voltage is fixed at 4.2V, while the charging current can be externally set via a resistor. When charging enters the constant voltage phase, the charging current automatically decreases. When the charging current drops to 1/10 of the set value, the indicator light turns on, but the charging current does not stop; it gradually decreases while maintaining the battery voltage at 4.2V. When the input voltage (AC adapter or USB power) is removed, the TP4062 automatically enters a low-current state, with a battery leakage current below 2uA. Other features of the TP4062 include a charging current monitor, undervoltage lockout, and two status pins indicating charging completion and input voltage connection.
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- Product Description
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- Commodity name: TP4062
- 封装: SOT23-6
- 品牌: Topin Microelectronics
The TP4062 is a complete single-cell lithium-ion battery charger with reverse polarity protection, featuring a higher charging current of 500mA and more stable current consistency. It uses constant current/constant voltage linear control. The SOT23-6 package and fewer external components make the TP4062 ideal for portable applications. The TP4062 uses an internal PMOSFET architecture and a reverse charge protection circuit, eliminating the need for external detection resistors and isolation diodes. Thermal feedback automatically adjusts the charging current to limit chip temperature during high-power operation or high ambient temperatures. The full voltage is fixed at 4.2V, while the charging current can be externally set via a resistor. When charging enters the constant voltage phase, the charging current automatically decreases. When the charging current drops to 1/10 of the set value, the indicator light turns on, but the charging current does not stop; it gradually decreases while maintaining the battery voltage at 4.2V. When the input voltage (AC adapter or USB power) is removed, the TP4062 automatically enters a low-current state, with a battery leakage current below 2uA. Other features of the TP4062 include a charging current monitor, undervoltage lockout, and two status pins indicating charging completion and input voltage connection.
Reverse connection protection for lithium battery positive and negative polesProgrammable charging current 500mA2 open-drain output pins for charging statusStandby power consumption is 50uA2.9V trickle charger versionSoft start limits inrush current6-pin SOT23-6 packageNo MOSFET, sense resistor, or isolation diode requiredFor single-cell lithium-ion batteriesDirectly charge a single-cell lithium-ion battery from a USB port4.2V preset charging voltage with ±1% accuracyAfter the charging indicator light turns on, the charging current gradually decreases and maintains the battery4.2V voltageMaximum input up to 9VConstant current/constant voltage operation with thermal regulation that maximizes charging rate without overheatingriskfunction
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