Datasheet > EMC 5754

EMC 5754

更新时间： 2024-11-18 05:34:43

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EMC 5754 数据手册

Preliminary

EMC5754

Elite MicroPower Inc.

Standalone Linear Li-Ion Battery Charger with

Thermal Regulation in SOT-25

General Description

Features

The EMC5754 is a complete linear charger for single cell

lithium-ion batteries. With small SOT-25 package and

few external components, EMC5754 is well suited for

portable applications. In addition, the EMC5754 is

specifically designed to work within USB power

specifications.

Programmable charge current up to 1A

No MOSFET, sense resistor or blocking diode

required

Complete linear charger in SOT-25 for single cell

Lithium-ion batteries

Typical zero reverse current from battery

Thermal regulation maximizes charge rate

without risk of overheating

No external sense resistor and blocking diode are

required. Charging current can be programmed

externally with a single resistor. The built-in thermal

regulation facilitates charging with maximum power

without risk of overheating.

Charges single cell Li-ion batteries directly from

USB port

Act as a LDO when battery is removed

Preset 4.2V charge voltage with ±1% accuracy

Automatic recharge

The EMC5754 always preconditions the battery with

1/10 of the programmed charge current at the

beginning of a charge cycle, until 40μs after it verifies

that the battery can be fast-charged. The EMC5754

automatically terminates the charge cycle when the

charge current drops to 1/10th the programmed value

after the final float voltage is reached.

Charge status indicator

C/10 charge termination

45μA shutdown supply current

2.9V trickle charge threshold

Soft-start limits inrush current

RoHS compliant and Pb-free

The EMC5754 consumes zero reverse current from the

battery at standby, shutdown and sleep modes. This

feature reduces the charge and discharge cycles on

the battery, further prolonging the battery life. The

EMC5754 can also be used as a LDO when battery is

removed. Other features include shutdown mode,

charge current monitor, under voltage lockout,

automatic recharge and status indicator.

Applications

Wireless handsets

Hand-held instruments

Portable information appliances

Bluetooth application

Charging docks and cradles

Typical Application Diagram

Typical Performance Characteristics

Complete Charge Cycle (850mAh Battery)

LDO Mode

(Battery Removed)

580 mA Charger

Time (1000s/DIV)

Elite MicroPower Inc. reserves the right to make changes to improve reliability or manufacturability without notice,

and customers are advised to obtain the latest version of relevant information prior to placing orders

DSC5754_V2.0 November 23^th2007

Page 1 of 16

www.elitemicropower.com

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