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PDF EMC5754 Data sheet ( Hoja de datos )
| Número de pieza | EMC5754 | |
| Descripción | Standalone Linear Li-Ion Battery Charger | |
| Fabricantes | EMP | |
| Logotipo |  |
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Elite MicroPower Inc.
Preliminary
EMC5754
Standalone Linear Li-Ion Battery Charger with
Thermal Regulation in SOT-25
General Description
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.
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.
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.
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,
www.DataSheet4Uc.hcaormge current monitor, under voltage lockout,
automatic recharge and status indicator.
Features
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
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
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
Applications
Wireless handsets
Hand-held instruments
Portable information appliances
Bluetooth application
Charging docks and cradles
Typical Application Diagram
580 mA Charger
LDO Mode
(Battery Removed)
Typical Performance Characteristics
Complete Charge Cycle (850mAh Battery)
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_V2.1 June 10th 2008
Page 1 of 17
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1 page  
Elite MicroPower Inc.
Preliminary
EMC5754
VCHGB CHGB Pin Output Low Voltage ICHGB =5mA
Recharge Battery Threshold
VRECHRG
Voltage
VFLOAT-VRECHRG
Junction Temperature in Constant
TILM
Temperature Mode
RON Power FET “ON” Resistance
TSS Soft-Start Time
IBAT=0 to IBAT=960V/RPROG
TRECHARGE Recharge Comparator Filter Time VBAT High to Low
Termination Comparator Filter
TTERM
Time
IBAT Falling Below ICHG/10
IPROG PROG Pin Pull-up Current
0.23 0.6
V
160 mV
120 oC
550 mΩ
100 µs
0.75 2.4 4.5 ms
0.4 1.1 2.5 ms
0.4 µA
Note 1: Absolute Maximum ratings indicate limits beyond which damage may occur. Electrical specifications are not
applicable when the device is operated outside of its rated operating conditions.
Note 2: All voltages are defined and measured with respect to the potential at the ground pin.
Note 3: Can not exceed 6.0V.
Note 4: Supply current includes PROG pin current (approximately 100µA) but does not include any current delivered
to the battery through the BAT pin (approximately 96mA).
Note 5: 80oC/W to150oC/W, depending on PCB Layout.
Functional Block Diagram
www.DataSheet4U.com
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_V2.1 June 10th 2008
Page 5 of 17
www.elitemicropower.com
5 Page 
Elite MicroPower Inc.
Preliminary
EMC5754
Typical Performance Characteristics
Unless otherwise specified, VIN = 5V, TA = 25°C. (Continued)
Charge Current vs PROG Pin Voltage
VBAT=2.5V
RPROG=2k
PROG Pin Pull-Up Current vs
Temperature and Supply Voltage
VBAT=4.3V
VPROG=0V
RPROG=2k
RPROG=10k
VIN=4.2V
VIN=5.5V
VPROG (V)
PROG Pin Current vs PROG Pin Voltage
(Pull-Up Current)
VBAT=4.3V
Temperature (oC)
PROG Pin Current vs PROG Pin Voltage
(Clamp Current)
VBAT=4.3V
www.DataSheet4U.com
VPROG (V)
Power FET “ON” Resistance vs Temperature
VIN=4.2V
IBAT=100mA
RPROG=2k
VPROG (V)
Temperature (oC)
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_V2.1 June 10th 2008
Page 11 of 17
www.elitemicropower.com
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| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet EMC5754.PDF ] | |
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