TP4054 Top Power ASIC Li-Ion Battery Charger Data Sheet
Download Datasheet for Top Power ASIC TP4054 Standalone Linear Li-Ion Battery Charger with Thermal Regulation [14 pages pdf/zip]
Description
The TP4054 is a complete constant-current/constant-voltage linear charger for single cell lithium-ion batteries. Its SOT package and low external component count make the TP4054 ideally suited for portable applications. Furthermore, the TP4054 can work within USB and wall adapter.
DATASHEET CONTAINS:
FEATURES
APPLICATIONS
TYPICAL APPLICATION
ABSOLUTE MAXIMUM RATINGS
TP4054 PINOUT
PACKAGE/ORDER INFORMATION
ELECTRICAL CHARACTERISTICS
TYPICAL PERFORRMANCE CHARACTERISTICS
PIN FUNCTIONS
BLOCK DIAGRAM
OPERATION
– Normal Charge Cycle
– Programming Charge Current
– Charge Termination
– Charge Status Indicator
– Undervoltage Lockout
– Manual Shutdown
– Automatic Recharge
– Figure 1. State Diagram of a Typical Charge Cycle
– Stability Considerations
– Figure 2. Isolating Capacitive Load on PROG Pin and Filtering
– Power Dissipation
– Thermal Considerations
– Increasing Thermal Regulation Current
– Figure 3. A Circuit to Maximize Thermal Mode Charge Current
– Figure 4. Charge Current vs RCC
– VCC Bypass Capacitor
– Charge Current Soft-Start
– Figure 5. Using a Microprocessor to Determine CHRG State
– Figure 6. Low Loss Input Reverse Polarity Protection
– Figure 7.Combining Wall Adapter and USB power
PACKAGE DESCRIPTION
TYPICAL APPLICATIONS