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PDF EUP8057 Data sheet ( Hoja de datos )
| Número de pieza | EUP8057 | |
| Descripción | Advanced 1A Linear Charge Management Controllers | |
| Fabricantes | Eutech Microelectronics | |
| Logotipo |  |
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EUP8057
Advanced 1A Linear Charge
Management Controllers
DESCRIPTION
The EUP8057 is a highly advanced Lithium-Ion (Li-Ion)
and Lithium–Polymer (Li-Pol) linear charge management
controller for use in cost sensitive and portable
applications. It combines high accuracy constant-current
and constant-voltage regulation, cell preconditioning,
temperature monitoring, automatic charge termination,
charge-status indication, in a space-saving MSOP-8,
TSSOP-8 package.
www.DTahtaeShEeUetP4U80.c5o7m applies a constant current up to 1A to the
battery and the charge current can be programmed
externally with a sense-resistor.
The EUP8057 automatically terminates the charge cycle
when the charge current drops to the charge termination
threshold (ITERM) after the charge-regulation voltage is
reached.
When the input supply is removed, the EUP8057
automatically enters a low-power sleep mode.
A battery charge state output pin is provided to indicate
battery charge status through a display LED. The battery
charge status output is a serial interface which may also be
read by a system microcontroller.
FEATURES
z 4.5V-15V Wide Input Voltage Range
z Ideal for Single Cell (4.1V or 4.2V) and Dual-Cell
(8.2V or 8.4V) Li-Ion or Li-Pol Batteries
z Preset Charge Voltage with ±1% Accuracy
z Programmable Charge Current up to 1A
z Constant-Current/Constant Voltage Operation
z Preconditioning of Low Voltage Cells
z Optional Cell-Temperature Monitoring Before and
During Charge
z Charge Status Output for Single of Dual Led or
Host Processor Interface
z Automatic Battery Recharge
z Charge Termination by Minimum Current
z Automatic Low-Power Sleep Mode When Input
Power is Removed
z Available in TSSOP-8, MSOP-8 and SOP-8
Package
z RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
z Cellular Phones / PDAs/ MP3 Players/DSC
z Handheld Instruments
DS8057 Ver 1.8 Nov. 2006
1
1 page  
EUP8057
Absolute Maximum Ratings
Supply voltage, (Vcc with respect to GND) -------------------------------------------------- -- -0.3 to +18V
Input voltage, SNS, BAT, TS, CE (all with respect to GND)-------------------------- -0.3V to VCC +0.3V
Sink current (STAT pin) not to exceed PD -------------------------------------------------------------- 20mA
Source current (STAT pin) not to exceed PD ---------------------------------------------------------- 10mA
Output current (CC pin) not to exceed PD -------------------------------------------------------------- 40mA
Maximum Junction Temperature, TJ ------------------------------------------------------------------- 150°C
Storage temperature range, Tstg ------------------------------------------------------------- -65°C to 150°C
Lead temperature (soldering, 10s) ------------------------------------------------------------------ 300°C
Package Thermal Resistance, θJA- MSOP8 ---------------------------------------------------------- 80°C/W
θJA- TSSOP8 --------------------------------------------------------- 70°C/W
θJA- SOP8 ------------------------------------------------------------- 67.9°C/W
ESD Rating -------------------------------------------------------------------------------------------- Note 1
www.DataSheet4U.Ncoomte 1: IC devices are inherently ESD sensitive; handling precautions required.
Recommended Operating Conditions
Supply voltage, VCC
Operating free-air temperature range, TA
Min.
4.5
-20
Max.
15
70
Unit
V
°C
Electrical Characteristics over Recommended Operating Free-Air Temperature Range
Symbol
I(VCC)
I(VCCS)
Parameter
VCC current
VCC Sleep current
Conditions
VCC=9V >VCC(min), Excluding
external loads
For EUP8057-4.1, EUP8057-4.2
V(BAT) ≥ V(min),
V(BAT)-VCC ≥ 0.8V
For EUP8057-8.2, EUP8057-8.3,
EUP8057-8.4 ,V(BAT) ≥ V(min),
V(BAT)-VCC ≥ 0.8V
EUP8057
Min. Typ. Max.
0.7 1.2
24
8
IIB(BAT)
IIB(SNS)
IIB(TS)
IIB(CE)
Input bias current on BAT pin
Input bias current on SNS pin
Input bias current on TS pin
Input bias current on CE pin
V(BAT)=V(REG)
V(SNS)=5V
V(TS)=5V
V(PI)=5V
1
1
1
1
Battery Voltage Regulation
VO(REG)
Output voltage
EUP8057-4.1
EUP8057-4.2
EUP8057-8.2
EUP8057-8.3
EUP8057-8.4
4.059 4.10 4.141
4.158 4.20 4.242
8.119 8.20 8.282
8.237 8.32 8.403
8.317 8.40 8.484
Unit
mA
µA
µA
µA
µA
µA
V
DS8057 Ver 1.8 Nov. 2006
5
5 Page 
VO(REG)
=
4.3 × (1 +
R
R
FB1
FB2
)V
www.DataSheet4U.com
Charge Termination and Recharge
The EUP8057 monitors the charging current during the
voltage-regulation phase. The EUP8057 declares a done
condition and terminates charge when the current drops
to the charge termination threshold, I(TERM). A new charge
cycle begins when the battery voltage falls below the
V(RCH) threshold.
Battery Temperature Monitoring
The EUP8057 continuously monitors temperature by
measuring the voltage between the TS and VSS pins. A
negative-or a positive-temperature coefficient thermistor
(NTC, PTC) and an external voltage divider typically
develop this voltage (See Figure9). The EUP8057
compares this voltage against its internal V(TS1) and V(TS2)
thresholds to determine if charging is allowed. (See
Figure10). The temperature sensing circuit is immune to
any fluctuation in VCC, since both the external voltage
divider and the internal thresholds (V(TS1) and V(TS2)) are
referenced to VCC.
The resistor values of R(T1) and R(T2) are calculated by the
following equations:
For NTC Thermistors
R T1
=
5 × R TH
3 × (R TC
× R TC
- R TH )
----------------------- (3)
R T2
=
5 × R TH × R TC
[(2 × (R TC ) - (7 × R TH )]
--------------- (4)
For PTC Thermaistors
R T1
=
5 × R TH
3 × (R TH
× R TC
- R TC )
EUP8057
---------------------- (5)
R T2
=
5 × R TH × R TC
[(2 × (R TH ) - (7 × R TC )]
------------- (6)
Where R(TC) is the cold temperature resistance and R(TH)
is the hot temperature resistance of thermistor, as
specified by the thermistor manufacturer.
RT1 or RT2 can be omitted if only one temperature (hot or
cold) setting is required. Applying a voltage between the
V(TS1) and V(TS2) thresholds to pin TS disables the
temperature-sensing feature.
DS8057 Ver 1.8 Nov. 2006
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet EUP8057.PDF ] | |
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