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PDF AIC1790 Data sheet ( Hoja de datos )
| Número de pieza | AIC1790 | |
| Descripción | 1 Cell Linear Lithium-Ion Battery Charger | |
| Fabricantes | Analog Intergrations Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AIC1790 (archivo pdf) en la parte inferior de esta página. Total 19 Páginas | ||
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AIC1790
1 Cell Linear Lithium-Ion Battery Charger
FEATURES
Complete Linear Charger for 1 Cell Lithium-Ion
Battery
Ideal for Low-Dropout Designs for Single-Cell Li-
ion or Li-Pol Packs in Space Limited Applications
No External MOSFET, Sense Resistor or Block-
ing Diode Required
Up to 1000mA Charge Current
Reverse Leakage Protection Prevents Battery
Drainage
Integrated Current and Voltage Regulation
Charge Termination by 1/10 Full Charge Current
Precharge With Safety Timer
Status Outputs for LED or System Interface Indi-
cates Charge and Fault Conditions
Battery Insertion and Removal Detection
Available in Tiny Thermally Enhanced MSOP10
Exposed Pad Package, SOP-8 Exposed Pad
Package and 3mm X 3mm DFN-10 Exposed Pad
Package
APPLICATIONS
Cellular Phones
Handheld Devices
Digital Still Cameras
MP3 Players
PDAs
Charging Docks and Cradles
USB Chargers
GENERAL DESCRIPTION
The AIC1790 is highly integrated Li-ion and Li-Pol
linear charge devices targeted at space limited
portable applications. It offers integrated power
MOSFET and current sensor, reverse blocking pro-
tection, high accuracy current and voltage regula-
tion, charge status, and charge termination, in a
small package.
The AIC1790 charges the battery in three phases,
precharge, constant current and constant voltage.
Charge is terminated based on 1/10 full charge
current. An internal charge timer provides a backup
safety feature for charge termination. AIC1790 au-
tomatically restarts the charge if the battery voltage
falls below an internal threshold. AIC1790 automat-
ically enters sleep mode when VCC supply is re-
moved.
In addition to the standard features, AIC1790 offers
a multitude of additional features. These include
temperature-sensing input for detecting hot or cold
battery packs; power good (PG) output indicating
the presence of input power.
Analog Integrations Corporation
Si-Soft Research Center
3A1, 1 Li-Hsin 1st Rd., Science Park, Hsinchu 300, Taiwan, R.O.C.
TEL: 886-3-5772500,
FAX: 886-3-5772510 www.analog.com.tw
DS-1790G-04 20140716
1
1 page  
AIC1790
ELECTRICAL CHARACTERISTICS
(VCC=5V, TA=25C, Unless otherwise specified.) (Note1)
PARAMETER
TEST CONDITIONS SYMBOL MIN.
Input Current
Operation Voltage
Vcc 4.5
VCC Current
VCC > VCC(MIN), STATx
pins in OFF state
Icc
0
Sleep Current
Sum of currents into
OUT and BAT pins, VCC
< V(SLP)
Input Bias Current on BAT pin VCC=0V, VIN=0V
Input Current on TS pin
Voltage Regulation
Output Voltage
For AIC1790GOW
For AIC1790-35GOW
VO(REG)
Voltage Regulation Accuracy
Dropout Voltage
Current Regulation
TA= -40 ~ 85℃,
RSET=10K
VO(REG) + VDO(MAX) ≦
VCC, IO(OUT) = 1000mA
VDO
-1%
Output Current Range
Output Current Set Voltage
Output Current Set Factor
V(BAT) > V(LOWV), VIN –
V(BAT) > VDO(MAX), t <
t(CHG)
VO=V(BAT)=3.8V,
RSET=10K
VO=V(BAT)=3.8V,
RSET=10K
IO(OUT)
200
V(CHG)
2.45
K(SET)
900
TYP. MAX. UNIT
5.5 V
3.5 5 mA
5 μA
500 nA
1 μA
4.2
4.35
1%
V
650 790 mV
1000 mA
2.50 2.55
V
1000 1100
5
5 Page 
AIC1790
PIN DESCRIPTIONS
IN Pin:
Charge input voltage. (For MSOP10
package, this input must be tied to
the VCC pin.)
VCC Pin: VCC supply input. (For MSOP10
package)
STAT1 Pin: Charge status output 1 (open-drain).
STAT2 Pin: Charge status output 2 (open-drain).
(For MSOP10 package)
APPLICATION INFORMATIONS
The AIC1790 is a Li-ion and Li-Pol linear charge de-
vice. It supports a precision Li-Ion, Li-Pol charging sys-
tem suitable for single-cells. The function flow chart
and the typical charging profile are shown in figure 13
and figure 14, respectively.
Battery Precharge Current
During a charge cycle, the AIC1790 provides a
precharge current to revive the deeply discharged bat-
tery if the battery voltage is lower than the V(LOWV). The
precharge current can be determined by the resistor
connected between the ISET pin and VSS pin, RSET.
IOPRECHG
VPRECHG K SET
RSET
The V(PRECHG) and K(SET) parameters are specified in
the specifications table. During the precharge period,
the safety timer, t(PRECHG), can be activated. If the bat-
tery voltage cannot reach the V(LOWV) within the timer
period, the AIC1790 can terminate the precharge ac-
tion and indicates FAULT on the STAT1 and STAT2
pins.
Battery Charge Current
The AIC1790 provides a constant charge current to
charge the battery when the battery voltage is between
the V(LOWV) and VO(REG). The charge current can be de-
VSS Pin:
ISET Pin:
PG Pin:
TS Pin:
BAT Pin:
OUT Pin:
Ground input.
Charge current set point.
Power good status output.
Temperature sense input.
Battery voltage sense input.
Charge current output.
termined by the resistor connected between the ISET
pin and VSS pin, RSET.
IOOUT
VCHG K SET
RSET
The V(CHG) and K(SET) parameters are specified in the
specifications table.
Battery Voltage Regulation
The AIC1790 monitors the battery-pack voltage
through the BAT pin. When the battery voltage rises to
VO(REG), the AIC1790 will enter voltage regulation mode
and the charge current will begin to decrease.
During the charge period, the safety timer, t(CHG), can
be activated. If the taper threshold, IO(TAPER), is not de-
tected within the timer period, the AIC1790 can termi-
nate the charge action and indicates FAULT on the
STAT1 and STAT2 pins.
Charge Taper Detection and Termination
Once the taper threshold is detected during the voltage
regulation period, the AIC1790 initiates the taper timer,
t(TAPER). The AIC1790 can terminate the charge action
after the timer expires. The taper detection level can
be determined by the resistor connected between the
ISET pin and VSS pin, RSET.
11
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet AIC1790.PDF ] | |
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