1A, Single Cell Linear Lithium Battery Charger

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4J30N Rev. F001

EC49022

Electrical Characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

TEMP pin voltage of the low-end flip

—

45

—

%Vcc

Recharge Battery Threshold Voltage

—

150

—

mV

Thermal Protection Temperature

—

145

—

°C

Soft-Start Time

—

20

—

µs

Recharge Comparator Filter Time

—

1

—

ms

Termination Comparator Filter Time

—

1

—

ms

PROG Pin Pull-Up Current

—

0.5

—

µA

Complete Charge Cycle (1000mAh Battery)

The EC49022 is a complete constant

–current & constant-voltage linear charger for single cell lithium-ion

batteries. Constant-current & constant - voltage to charger batter by internal MOSFET .It can deliver up to 1A of

charge current .No blocking diode or external current sense resistor is required. EC49022 include two

Open-Drain charge status Pins: Charge status indicator

and battery failure status output

.The

internal thermal regulation circuit reduces the programmed charge current if the die temperature attempts to rise

above a preset value of approximately 145℃. This feature protects the EC49022 from excessive temperature,

and allows the user to push the limits of the power handling capability of a given circuit board without risk of

damaging the EC49022 or the external components. Another benefit of adopting thermal regulation is that charge

Typical Performance Characteristics

Applications