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PDF EUP8095JIR1 Data sheet ( Hoja de datos )
| Número de pieza | EUP8095JIR1 | |
| Descripción | 1.5A Linear Li-Ion/Polymer Charger IC | |
| Fabricantes | Eutech Microelectronics | |
| Logotipo |  |
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EUP8095
1.5A Linear Li-Ion/Polymer Charger IC
with Integrated FET and Charger Timer
DESCRIPTION
The EUP8095 series are highly integrated single cell
Li-Ion/Polymer battery charger IC designed for handheld
devices. This charger is designed to work with various
types of AC adapters or a USB port and capable of
operating with an input voltage as low as 2.65V.
The EUP8095 operates as a linear charger and charges the
battery in three phases: trickle current, constant current,
and constant voltage. When AC-adapter is applied, an
external resistor sets the magnitude of the charge current,
which may be programmed up to 1.5A with TDFN10
package and a current-limited adapter for lowest power
dissipation.
The EUP8095 features thermal regulation loop to control
charge current to keep safe operation when PCB lacked of
enough heat-sinking. A programmable charge timer
provides a backup safety for termination. The EUP8095
automatically re-starts the charge if the battery voltage
falls below an internal threshold and automatically enters
sleep mode when DC supplies are removed. No external
sense resistor or blocking diode is required for charging. A
NTC thermistor interface is used for charging the battery
in a safe temperature range.
FEATURES
z Very Low Power Dissipation
z Accepts Multiple Types of Adapters or USB BUS
Power
z Integrated Power FET and Current Sensor for Up
to 1.5A Charge Applications
z Guaranteed to Operate at 2.65V After Start-Up
z Charge Termination by Minimum Current and
Time
z Precharge Conditioning With Safety Timer
z Reverse Leakage Protection Prevents Battery
Drainage
z Charge Current Thermal Regulation
z Status Outputs for LED or System Interface
Indicates Charge and Fault Conditions
z Optional Battery Temperature Monitoring Before
and During Charge
z Automatic Sleep Mode for Low-Power
Consumption
z Available in 3mm × 3mm TDFN-10 Package
z RoHS Compliant and 100% Lead (Pb)-Free
Typical Application Circuit
APPLICATIONS
z PDAs, Cell Phones and Smart Phones
z Portable Instruments.
z Stand-Alone Charger.
z USB Bus Powered Charger.
DS8095 Ver 0.1 July 2008
Figure 1.
1
1 page  
EUP8095Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
Absolute Maximum Ratings
Supply Voltage (VIN) --------------------------------------------------------------------------------- -0.3V to 7V
Output Pin Voltage (VBAT) ------------------------------------------------------------------------ -0.3V to 5.5V
Signal Input Voltage (EN,TIME, IREF) ------------------------------------------------------------ -0.3V to 7V
Output Pin Voltage ( STATUS , FAULT ) ----------------------------------------------------- -0.3V to 5.5V
Junction temperature range, TJ ------------------------------------------------------------------------- 150°C
Storage temperature range, Tstg ------------------------------------------------------------- -65°C to 150°C
Lead temperature (soldering, 10s) -------------------------------------------------------------------- 260°C
Dissipation Ratings
Package
TDFN-10
JA
48°C/W
TA < 40°C
Power Rating
1.5W
Derating Factor
Above TA =25°C
0.0208 W/°C
Recommended Operating Conditions
Supply voltage ,VIN
Ambient Temperature Range
Min.
4.3
-20
Max.
6.5
70
Unit
V
°C
Electrical Characteristics
Typical values are tested at VIN = 5V and +25°C Ambient Temperature, maximum and minimum values are guaranteed
over 0°C to +70°C Ambient Temperature with a supply voltage in the range of 4.3V to 6.5V, unless otherwise noted.
Symbol
Parameter
Conditions
EUP8095
Min. Typ. Max.
Unit
POWER-ON RESET
Rising VIN Threshold
3.0 3.4 4.0 V
Falling VIN Threshold
2.25 2.4 2.65 V
STANDBY CURRENT
ISTANDBY VBAT Pin Sink Current VIN floating or EN = LOW
- - 3.0 µA
IVIN VIN Pin Supply Current VBAT floating and EN pulled low
- 30 - µA
IVIN VIN Pin Supply Current VBAT floating and EN floating
- 1 - mA
VOLTAGE REGULATION
VCH Output Voltage
4.158 4.20 4.242 V
Dropout Voltage
VBAT = 3.7V, 0.5A, 3X3 package
- 170 - mV
CHARGE CURRENT
ICHARGE Constant Charge Current
ITRICKLE Trickle Charge Current
RIREF = 80kΩ, VBAT = 3.7V
RIREF = 80kΩ, VBAT = 2.0V
0.9 1.0 1.1 A
- 110 - mA
ICHARGE Constant Charge Current IREF Pin Voltage > 1.2V, VBAT = 3.7V 400 450 520 mA
ITRICKLE Trickle Charge Current
IREF Pin Voltage > 1.2V, VBAT = 2.0V
-
50
- mA
DS8095 Ver 0.1 July 2008
5
5 Page 
OPERATION
EUP8095Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
The EUP8095 is an integrated charger for single-cell
Li-ion or Li-polymer batteries. As a linear charger, the
EUP8095 charges a battery in the popular constant
current (CC) and constant voltage (CV) profile. The
constant charge current IREF is programmable up to 1.5A
with an external resistor or a logic input. The charge
voltage VCH has 1% accuracy over the entire
recommended operating condition range. A
thermal-regulation feature removes the thermal concern
typically seen in linear chargers. The charger reduces the
charge current automatically as the IC internal
temperature rises above +110°C to prevent further
temperature rise. The thermal-regulation feature
guarantees safe operation when the printed circuit board
(PCB) is space limited for thermal dissipation.
Figure 19 shows the typical charge curves in a traditional
linear charger powered with a constant-voltage adapter.
From the top to bottom, the curves represent the constant
input voltage, the battery voltage, the charge current and
the power dissipation in the charger. The power
dissipation PCH is given by the following equations:
( )PCH = VIN - VBAT × ICHARGE
(1)
where ICHARGE is the charge current. The maximum
power dissipation occurs during the beginning of the CC
mode. The maximum power the IC is capable of
dissipating is dependent on the thermal impedance of the
printed-circuit board (PCB). Figure 19 shows, with
dotted lines, two cases that the charge currents are
limited by the maximum power dissipation capability due
to the thermal regulation.
When using a current-limited adapter, the thermal
situation in the EUP8095 is totally different. Figure 19
shows the typical charge curves when a current-limited
adapter is employed.
The operation requires the IREF to be programmed higher
than the limited current ILIM of the adapter, as shown in
Figure 20. The key difference of the charger operating
under such conditions occurs during the CC mode. The
adapter current is limited, the actual output current will
never meet what is required by the current reference.
Therefore, the main MOSFET becomes a power switch
instead of a linear regulation device. The power
dissipation in the CC mode becomes:
PCH = R DS(ON) × ICHARGE 2
(2)
where RDS(ON) is the resistance when the main MOSFET
is fully turned on. This power is typically much less than
the peak power in the traditional linear mode.
Figure 19. Typical Charge Curves Using a
Constant-Voltage Adapter
Figure 20. Typical Charge Curves Using a
Current Limited Adapter
Battery Pre-Conditioning
During a charge cycle if the battery voltage is below the
V(MIN) threshold, the EUP8095 applies a precharge
current, ITRICKLE, to the battery. This feature revives
deeply discharged cells. The resistor connected between
the IREF and GND, RIREF, determines the precharge rate.
IREF
=
0.8V ×104
R IREF
(3)
The EUP8095 activates a safety timer, ITRICKLE, during
the conditioning phase. If VMIN threshold is not reached
within the timer period, the EUP8095 turns off the
charger and enunciates FAULT on the FAULT pins.
DS8095 Ver 0.1 July 2008
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet EUP8095JIR1.PDF ] | |
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