TP4056-42

Part: TP4056-42-ESOP8 — NanJing Top Power ASIC Corp.

Type: Standalone Linear Li-Ion Battery Charger

Description: 1 A standalone CC/CV linear charger for single-cell Li-Ion batteries with a 4.0–8.0 V input, a fixed 4.2 V float voltage (±1%), an internal PMOSFET and C/10 termination.

Operating Conditions:

• Supply voltage: 4.0–8.0 V (typ. 5 V)
• Operating temperature: -40 to 85 °C
• Programmable charge current up to 1000 mA via R_PROG (R_PROG = 1100 / I_BAT, in kΩ and mA)

Absolute Maximum Ratings:

• Max supply voltage (VCC): 8 V
• Max BAT pin current: 1200 mA
• Max junction temperature: 145 °C
• Storage temperature: -65 to 125 °C

Key Specs:

• Float voltage: 4.158 / 4.2 / 4.242 V (min/typ/max; 0 °C ≤ TA ≤ 85 °C, I_BAT = 40 mA)
• BAT pin current (R_PROG = 1.1 kΩ, current mode): 850 / 1000 / 1150 mA
• Trickle charge current: 130 mA typ. (V_BAT < V_TRIKL, R_PROG = 1.1 kΩ); threshold 2.8 / 2.9 / 3.0 V
• Input supply current: 150 μA typ., 500 μA max in charge mode (R_PROG = 1.1 kΩ); 55 μA typ., 100 μA max in standby and shutdown
• VCC UVLO: 3.7 V typ. (3.5–3.9 V), 200 mV hysteresis typ.
• C/10 termination threshold: 130 mA typ. (R_PROG = 1.1 kΩ)
• Recharge threshold: V_FLOAT − V_RECHRG = 150 mV typ. (100–200 mV)
• Power FET on-resistance: 650 mΩ typ.
• Thermal regulation limit: 145 °C typ.
• BAT pin current in sleep mode (VCC = 0 V): -1 μA typ., -2 μA max

Features:

• No external MOSFET, sense resistor or blocking diode required
• Constant-current/constant-voltage operation with thermal regulation
• Automatic recharge and automatic end-of-charge control
• C/10 charge termination
• Soft-start limits inrush current (20 μs typ.)
• Two open-drain charge status outputs (CHRG, STDBY)
• Battery temperature sensing via TEMP pin (NTC thermistor)
• Under-voltage lockout (UVLO)
• Chip enable (CE) pin for shutdown

Applications:

• Cellular telephones, PDAs, GPS
• Charging docks
• Digital cameras, portable devices
• USB bus-powered chargers

Package:

• ESOP8 (TP4056-42-ESOP8)
• EMSOP8 (TP4056-42-EMSOP8)

• ·Programmable Charge Current Up to 1000mA
• ·No MOSFET, Sense Resistor or Blocking Diode Required
• ·Complete single-cell linear Li-Ion battery charger in ESOP8/EMSOP8 Package
• ·Constant-Current/Constant-Voltage operation with thermal regulation
• ·Preset 4.2V Charge Voltage with 1% Accuracy
• ·Automatic Recharge
• ·Automatic End-of-charge control
• ·UVLO
• ·Two Charge Status Output Pins
• ·C/10 Charge Termination
• ·55μA Charge Current in Standby Mode
• ·2.9V Trickle Charge Threshold
• ·Soft-Start Limits Inrush Current
• ·8-Lead ESOP /EMSOP Package

• ·Cellular Telephones, PDAs, GPS
• ·Charging Docks
• ·Digital Cameras, Portable Devices
• ·USB Bus-Powered Chargers

TEMP (Pin 1) : Temperature Sense Input. Connecting TEMP pin to NTC thermistor's output pin in Lithium ion battery pack. If TEMP pin's voltage is below 45% or above 80% of supply voltage VIN, this means that battery's temperature is too high or too low, charging is suspended. The temperature sense function can be disabled by grounding the TEMP pin.

PROG (Pin 2) : Constant Charge Current Programming and Charge Current Monitor. Charge current is programmed by connecting a resistor RISET from this pin to GND. When in recharge mode, this pin's voltage is regulated to 0.1V. When in constant-current mode, this pin is regulated to 1V. In all modes during charging, the voltage on this pin can be used to measure the charge current as follows: IBAT=(VPROG/RPROG) · 1100

GND (Pin3) : Ground Terminal

Vcc (Pin 4) : Positive Input Supply Voltage. Provides power to the charger. When VCC is within 30mV of the BAT pin voltage, the TP4056 enters shutdown mode dropping BAT pin's current to less than 2μA.

BAT (Pin5) : Battery Connection. Connect the positive terminal of the battery to the BAT pin. BAT pin provides charge current to the battery and regulates the final float voltage to 4.2V . BAT pin draws less than 2μA current in chip disable mode or in sleep mode.

STDBY (Pin6) : Charge Status Open-Drain Output. When battery charge cycle completes, STDBY pin is pulled low by an internal switch, otherwise STDBY pin is high impedance.

CHRG (Pin7) : Charge Status Open Drain Output. When the battery is charging, the CHRG pin is pulled low by an internal switch, otherwise CHRG pin is high impedance.

CE (Pin8) : Chip Enable Input. A logic high on CE pin will put the device in normal operation mode. Pulling the CE pin to low will put the TP4056 into shutdown mode. The CE pin can be driven by TTL or CMOS logic level.

The ● denotes specifications which apply over the full operating temperature range, otherwise

specifications are at TA=25°C

, VCC =5V, unless otherwise noted.

• ·Input Supply Voltage(VCC) : -0.3V ~ 8V

• ·PROG : -0.3V ~ Vcc+0.3V

• ·BAT : -0.3V ~ 0.7V

• ·EMBED PBrush : -0.3V ~ 10V

• ·TEMP : -0.3V ~ 10V

• ·CE : -0.3V ~ 10V

• ·BAT Short-Circuit Duration : Continuous

• ·BAT Pin Current

• : 1200mA

• ·PROG Pin Current : 1200μA

• ·Maximum Junction Temperature : 145°C

• ·Operating Ambient Temperature Range : -40°C~85°C

• ·Storage Temperature Range : -65°C~125°C

• ·Lead Temp.(Soldering, 10sec) : 260°C

When charging, transient loads on the BAT pin can cause the PROG pin to fall below 100mV for short periods of time before the DC charge current has dropped to 1/10th the programmed value. The 1.8ms filter time (tTEMP) on the termination comparator ensures that transient loads of this nature do not result in premature charge cycle termination. Once the average charge current drops below 1/10th the programmed value, the TP4056 terminates the charge cycle and ceases to provide any current through the BAT pin. In this state all loads on the BAT pin must be supplied by the battery.

The TP4056 constantly monitors the BAT pin voltage in standby mode. If this voltage drops below the 4.05V recharge threshold (VRECHRG), another charge cycle begins and charge current is once again supplied to the battery. Figure 1 shows the state diagram of a typical charge cycle.

Fig.1 State diagram of a typical charge cycle

1. With temperature monitoring and charging status indicators.
2. With charging status indicator but no battery temperature monitoring (Left)
3. With neither charging status indicator nor battery temperature monitoring (Right)
4. Applications for both USB and Wall adaptor charging (Left)
5. Red LED for charging, green LED for charging completes. External R for heat dissipation. (Right)