Chipown AP4054X4000M, AP4054X4025M, AP4054X4050M, AP4054X4075M, AP4054X4100M Schematic [ru]

Chipown

AP4054

STANDALONE LINEAR LI-ION BATTERY CHARGER
WITH THERMAL REGULATION IN THINSOT

■ DESCRIPTION

The AP4054 is a completeconstant-current/constant-voltagelinear chargerfor single cell lithium-ion

batteries. Its ThinSOT package and low external component count make the AP4054 ideally suited for
portable applications. Furthermore, the AP4054 is specifically designed to work within USB power
specifications.

No external sense resistor is needed, and no blocking diode is required due to the internal MOSFET

architecture. Thermal feedback regulates the charge current to limit the
die temperatureduring high power operationor high ambient temperature. The charge voltage is fixed at

4.2V, and the charge current can be programmed externally with a single resistor. The AP4054
automatically terminates the charge cycle when the charge current drops to 1/10ththe programmed

value after the final float voltage is reached.

When the input supply (wall adapter or USB supply) is removed, the AP4054 automatically enters a

low current state, dropping the battery drain current to less than 2A. The AP4054 can be put into
shutdown mode, reducing the supply current to 25A.

Other features include charge current monitor, under-voltage lockout, automatic recharge and a

status pin to indicate charge termination and the presence of an input voltage.

■ FEATURES

Programmable Charge Current Up to 800mA



No MOSFET, Sense Resistor or Blocking Diode Required



Complete Linear Charger in ThinSOT Package for single Cell Lithium-Ion Batteries



Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge



Rate Without Risk of Overheating
Charges Single Cell Li-Ion Batteries Directly from USB Port



Preset 4.2V Charge Voltage with 1% Accuracy



Charge Current Monitor Output for Gas Gauging



Automatic Recharge



Charge Status Output Pin



C/10 Charge Termination



25A Supply Current in Shutdown



2.9V Trickle Charge Threshold



Soft-Start Limits Inrush Current



Available in 5-Lead SOT-23 Package



■ APPLICATIONS

 Cellular Telephones, PDAs, MP3 Players
 Charging Docks and Cradles

 Bluetooth Applications

■ PACKAGE

 SOT-23-5

Wuxi Chipown INC .

Wuxi Chipown INC .

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Chipown

Standalone Linear Li-Ion Battery Charger with Thermal Regulation

■ BLOCK DIAGRAM

AP4054

AP4054

Figure 1

■ ABSOLUTE MAXIMUM RATINGS

PARAMETER SYMBOL MAXIMUM RATING UNIT

Input Supply Voltage V

PROG pin Voltage Vprog VSS-0.3～Vcc+0.3

BAT pin Voltage Vbat Vss-0.3～7

CHAG pin Voltage Vchrg VSS-0.3～VSS+10

BAT pin Current Ibat 800 mA

PROG pin Current Iprog 800 uA

OperatingAmbient Temperature Topa -40～+85

StorageTemperature Tstr -65～+125

Caution: The absolute maximum ratings are rated values exceeding which the product could suffer physical

damage. These values must therefore not be exceeded under any conditions.

Wuxi Chipown INC .

Wuxi Chipown INC .

cc

-- --

VSS-0.3～VSS+10

V

°C

2

Chipown

AP4054

■ Electrical Characteristics

Parameter Symbol CONDITION MIN TYP MAX UNIT

Input supply voltage Vcc 4.25 6.5 V

Charge mode,Rprog=10K 300 2000 uA

Input supply current Icc

connected,Vcc<Vbat or Vcc<Vuv)

Regulated Output Voltage Vfloat 0C TA 85C, IBAT = 40mA 4.158 4.2 4.342 V

BAT pin Current Ibat

Trickle charge current Itrikl Vbat<Vtrikl,Rprog=2k 20 45 70 mA

Trickle charge Threshold Voltage Vtrikl Rprog=10K，Vbat Rising 2.8 2.9 3.0 V

Trickle voltage hysteresis

voltage

Vcc Undervoltage lockout

Threshold

Vcc undervoltage lockout

hysteresis

voltage

voltage

Threshold

PROG pin Voltage Vprog Rprog=10k, Current mode 0.93 1.0 1.07 V

CHRG pin weak pull-down Current Ichrg Vchrg=5V 8 20 35 uA

CHRG pin Output low voltage Vchrg Ichrg=5mA 0.35 0.6 V

Recharge Battery threshold

Voltage

Vtrhys Rporg=10k 60 80 110 mV

Vuv From Vcc low to high 3.7 3.8 3.93 V

Vuvhys 150 200 300 mV

Vmsd

Vasd

Iterm

ΔVrecg VFLOAT - VRECHRG 100 200 mV

Standby mode 200 500 uA

Shutdown mode(Rprog not

Rprog=10k,Current mode 93 100 107 mA

Rprog=2k,Current mode 465 500 535 mA

Standby mode,Vbat=4.2V 0 -2.5 -6 uA

Shutdown mode

Sleep mode,Vcc=0V

PROG pin rising 1.15 1.21 1.30 VManual shutdown threshold

PROG pin falling 0.9 1.0 1.1 V
Vcc from low to high 70 100 140 mVVcc-Vbat Lockout Threshold
Vcc from high to low 5 30 50 mV

Rprog=10k 0.085 0.10 0.115 mA/mAC/10 Termination Current

Rprog=2k 0.085 0.10 0.115 mA/mA

25 50 uA

1 2

1 2

uA
uA

■ TYPICAL APPLICATION CIRCUIT

Basic circuit

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Wuxi Chipown INC .

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