TOP POWER ASIC Introduces TP4065 Linear Li-lon Battery Charger with Charge Current Ranging From 3mA to 600mA

PublishTime： 2024-01-04 Article Source：TOP POWER ASIC

The TP4065 Linear Li-lon Battery Charger from TOP POWER ASIC is a complete linear charger for single cell lithium-ion batteries. The world's first chip with reverse battery protection and power supply reverse connect protection. The charge current can range from 3mA to 600mA, and it includes trickle, constant current, and constant voltage. Its SOT23-5 package and low external component count make the TP4065 ideally suited for portable applications. Furthermore, the TP4065 can work with USB and wall adapters.

Thermal feedback regulates the charge current to limit the die temperature during high power operation or high ambient temperature. The charge voltage can be divided by 4.2V, and the charge current can be programmed externally with a single resistor. The TP4065 automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage reaches.

When the input supply (wall adapter or USB supply) is removed, the TP4065 automatically enters a low current state, dropping the battery drain current to less than 1μA. The TP4065 can be put into shutdown mode, reducing the supply current to 75μA. Other features include under voltage lockout, automatic recharge, and two status pins to indicate charge termination.

FEATURES

Programmable Charge Current range from 3mA to 600mA

VCC input reverse connect protection

Lithium-ion batteries Reverse battery protection

Maximize Charge Rate Without Risk of Overheating

For Single Cell titanic acid Lithium-Ion Batteries

Trickle, constant-current and constant-voltage control

Charges Single Cell Li-Ion Batteries

Directly from the USB Port

Preset Charge Voltage with 1% Accuracy

The highest input can be up to 8V

Automatic Recharge

One Charge Status Output Pins

C/10 Charge Termination

75μA Supply Current in Shutdown

Available in 5-Lead SOT-23 Package

APPLICATIONS

Miniature lithium battery

Cellular phone、PAD、MP3 player

TYPICAL APPLICATION

Figure 1 500mA Single Cell Li-lon Charger

Note: The proposed R1 dissipation resistor, can get a larger charge current, and also improve the reliability of the machine. Resistance is selected according to the actual situation (0 ~ 0.6Ω).

Complete Charge Cycle (500mAh Battery)

ABSOLUTE MAXIMUM RATINGS

VCC：-6.5V～8V

PROG：-0.3V～VCC+0.3V

BAT：-4.35V～7V

CHRG：-0.3V～8V

BAT Pin Current：700mA

PROG Pin Current：2mA

Maximum Junction Temperature：150℃

Operating Ambient Temperature Range：-40℃～85℃

Storage Temperature Range：-65℃～125℃

Lead Temperature(Soldering, 10sec)：260℃

ELECTRICAL CHARACTERISTICS

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