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EMC5060 Datasheet Preview

EMC5060 Datasheet

Single-cell Li-Ion Charger IC

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ESMT/EMP
EMC5060
Single-cell Li-Ion Charger IC with System
Power Management
General Description
The EMC5060 is a single-cell Li-ion charger IC with
system power management feature. It charges the
battery and power the system simultaneously. The
maximum charging current (up to 1.5A) is set by
external resistor for fast charging. The output voltage
for the system is regulated to a nominal value (three
different versions available: 4.4V, 5V or 6V); the
actual value of the output voltage depends on the
input voltage from the adapter, the charging
current and the system loading. With the decrease
of the input voltage or the increase of the system
loading current, the output voltage drops. When the
output voltage drops to a predetermined value
(VAPM-REG), the Active Power Management
function is activated and tries to maintain the output
voltage at VAPM-REG; the EMC5060 will suffice the
system loading with first priority and reduce the
charging current temporarily, i.e. under heavy load
condition, the EMC5060 charges the battery with
the remaining available current to keep the output
voltage at VAPM. In this manner, the charge and
discharge cycle of the battery can be reduced.
It is possible that the EMC5060 fails to maintain the
output voltage at VAPM-REG; for example, when the
system loading current exceeds the capability of the
current-limiting AC adapter. In this scenario, the
output voltage drops to the battery voltage, and
the system is allowed to draw current from the
battery.
Features
„ TQFN-20L Package
„ Active Power Management(APM) for
Simultaneously Powering the System and
Charging the Battery
„ Total Current Supported Up to 2 Amperes
( System Loading Having Higher Priority on the
Budget )
„ Automatic Power Source Selection (AC Adapter
or Battery)
„ 40mPower Path for the Battery to Supply the
System Power Efficiently
„ Junction Temperature Detection and Thermal
Regulation During Charging Process
„ External LED Indicating Charger and Power Good
Status as well as Fault Condition
„ Thermal, Short-Circuit, and Reverse Current
Protection
„ Short-Circuit Protection in the Low Power
Consumption Sleep Mode
„ SYSOFF Function to Cut Off the Path between the
System and the Battery
„ 6V (VOUT = 4.4V) Maximum Input Operating
Applications
„ Battery-Powered Devices or Equipment
„ Mobile Phones, Digital Cameras and MP3 Players
„ Radios, other Hand-Held Games and Instruments
„ Solar Power System
Elite Semiconductor Memory Technology Inc./Elite MicroPower Inc. Publication Date: Dec. 2011
Revision: 0.3
1/22




Elite Semiconductor

EMC5060 Datasheet Preview

EMC5060 Datasheet

Single-cell Li-Ion Charger IC

No Preview Available !

ESMT/EMP
Power Flow
AC Adapter (or USB)
VDC
IN
Q1
-+
EMC5060
OUT
Q2
40 m
BAT
EMC5060
System
The EMC5060 selects the power source automatically. In the absence of the input source (AC adapter or USB),
the battery is chosen to power the system. Under this circumstance, the EMC5060 consumes less than 5uA; the
power path resistance from the battery to the system is only 40m; all these guarantee a high efficiency and
elongate the battery discharge time. With this stringent sleep current budget (< 5uA), the EMC5060 is still able
to detect an output short condition and cuts off the power path between the battery and the system under
short condition.
With the input power present, the mode pin sets the EMC5060 in adapter mode or USB mode. In adapter mode,
EMC5060 does not limit the total current directly, current limiting phenomenon occurs through Adaptive Power
Management in response to the output voltage drop. The resistor connected to ISET1 pin sets the maximum
charging current. This maximum charging current can be halved by pulling down the ISET2 pin. In USB mode,
the EMC5060 will limit the total current within 450mA (ISET2=1) or 90mA (ISET2=0). The maximum charging
current is still set by the resistor connected to ISET1 pin; however, because of this current limiting feature, the
actual charging current is usually less than 450mA (or 90mA).
MODE Pin Level
Low
High
Power Source Selection and Charge Current Setting
AC Adapter
Loading Power
Source
Charge Current Setting
Yes USB
ISET1, limitation depends on ISET2 setting
No Battery N/A
Yes
AC Adapter
ISET1, half charging rate by setting ISET2 to low
No Battery N/A
Elite Semiconductor Memory Technology Inc./Elite MicroPower Inc. Publication Date: Dec. 2011
Revision: 0.3
2/22


Part Number EMC5060
Description Single-cell Li-Ion Charger IC
Maker Elite Semiconductor
Total Page 22 Pages
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