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부품번호 A4054A 기능
기능 800mA STANDALONE LINEAR Li-ion BATTERY CHARGER
제조업체 AiT Semiconductor
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A4054A 데이터시트, 핀배열, 회로
AiT Semiconductor Inc.
www.ait-ic.com
A4054A
800mA STANDALONE LINEAR Li-ion BATTERY CHARGER
THERMAL REGULATION
DESCRIPTION
The A4054A is a complete constant current / constant
voltage linear charger for single cell Lithium-Ion
batteries. 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 temperature during
high power operation or high ambient temperature.
The charge voltage is fixed at 4.2V, and the charge
current can be programmed externally with a single
resistor. The A4054A automatically terminates the
charge cycle when the charge current drops to 1/10
the programmed value after the final float voltage is
reached.
When the input supply (wall adapter or USB supply) is
removed, the A4054A automatically enters a low
current state, dropping the battery drain current to
less than 2μA. The A4054A can be put into shutdown
mode, reducing the supply current to 25μA. 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. A4054A will check the battery voltage
first, it will not start charging unless the battery
voltage is below the auto-rechrage threshold.
The A4054A is available in SOT-25 packages.
FEATURES
Programmable Charge Current Up to 800mA
No MOSFET, Sense Resistor or Blocking
Diode Required
Preset 4.2V Charge Voltage with ±1%
Accuracy
Charge Current Monitor Output for Gas
Gauging
Thermal Regulation Maximizes Charge Rate
Without Risk of Overheating
Charges Single Cell Li-Ion Batteries Directly
from USB Port
Over-Voltage Protect
Automatic Recharge
Charge Status Output Pin
C/10 Charge Termination
25μA Supply Current in Shutdown
2.9V Trickle Charge Threshold
Soft-Start Limits Inrush Current
Available in SOT-25 Packages
APPLICATION
Cellular and Smart Phones
Charging Docks and Cradles
Blue Tooth Applications
PDAs
MP3/MP4/MP5 Players
ORDERING INFORMATION
TYPICAL APPLICATION
Package Type
Part Number
SOT-25
A4054AE5R
E5
A4054AE5VR
Note
R: Tape & Reel
V: Halogen free Package
AiT provides all RoHS products
Suffix “V” means Halogen free Package
REV1.1
- DEC 2008 RELEASE, JUN 2012 UPDATED -
-1-




A4054A pdf, 반도체, 판매, 대치품
AiT Semiconductor Inc.
www.ait-ic.com
A4054A
800mA STANDALONE LINEAR Li-ion BATTERY CHARGER
THERMAL REGULATION
ELECTRICAL CHARACTERISTICSNOTE2
VCC = 5V, TA = 25°C, unless otherwise noted.
Parameter
Symbol
Charge Mode Supply Current NOTE3
ISPLYCHRG
Charge Mode Battery Current
IBATCHRG
PROG Pin Voltage
Standby Mode Supply Current
Standby Mode Battery Current
Manual Shutdown Mode Supply
Current
Manual Shutdown Mode Battery
Current
PROG Pin Clamp Voltage
Automatic Shutdown Mode Supply
Current
Automatic Shutdown Mode Battery
Current
UVLO Mode Supply Current
UVLO Mode Battery Current
Sleep Mode Battery Current
Float Voltage
VPROGCHRG
ISPLYSTBY
IBATSTBY
ISPLYMSD
IBATMSD
VPROGCLMP
ISPLYASD
IBATASD
ISPLYUVLO
IBATUVLO
IBATSLEEP
VFLOAT
Trickle Charge Current
ITRIKL
Trickle Charge Threshold
Trickle Charge Hysteresis
UVLO Threshold
UVLO Hysteresis
Input Over-Voltage Protect Threshold
Input Over-Voltage Protect Hysteresis
VTRIKL
VTRIKL, HYS
VUVLO
VUVLO, HYS
VOVP
VOVP, HYS
REV1.1
- DEC 2008 RELEASE, JUN 2012 UPDATED -
Conditions
RPROG=2kΩ
RPROG =10kΩ
RPROG =2kΩ
RPROG =10kΩ
RPROG =2kΩ
RPROG =10kΩ
Min.
465
93
0.93
Typ. Max. Unit
300 2000 μA
500 535
mA
100 107
1 1.07 V
100 500
-2.5 -6
μA
μA
90 μA
-2 0
2 μA
2 3V
25 50 μA
-2 0
2 μA
25 50 μA
-2 2 μA
-1 1 μA
4.158 4.2 4.242 V
RPROG =2kΩ
20 50 70
mA
RPROG =10kΩ
5
10 15
2.8 2.9
3
V
60 100 150 mV
3.7 3.9 4.1
V
150 200 300 mV
6.8 7 7.2 V
200 mV
-4-

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A4054A 전자부품, 판매, 대치품
AiT Semiconductor Inc.
www.ait-ic.com
A4054A
800mA STANDALONE LINEAR Li-ion BATTERY CHARGER
THERMAL REGULATION
7. Regulated Output (Float) Voltage vs.
Charge Current
8. Regulated Output (Float) Voltage vs. Temperature
9. Regulated Output (Float) Voltage vs. Temperature 10. CHRGb Pin I-V Curve (Strong Pull-Down State)
11. CHRGb Pin Current vs. Temperature
(Strong Pull-Down State)
12. CHRGb Pin I-V Curve (Weak Pull-Down State)
REV1.1
- DEC 2008 RELEASE, JUN 2012 UPDATED -
-7-

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A4054A

800mA STANDALONE LINEAR Li-ion BATTERY CHARGER

AiT Semiconductor
AiT Semiconductor

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