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參數(shù)資料
| 型號： | ISL9201IRZ-T |
| 廠商： | INTERSIL CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Li-ion Battery Charger |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| 封裝： | 3 X 3 MM, ROHS COMPLIANT, PLASTIC, DFN-10 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 177K |
| 代理商： | ISL9201IRZ-T |
6
FN6429.1
February 22, 2007
Theory of Operation
The ISL9201 is an integrated charger for single-cell Li-ion or
Li-polymer batteries. The ISL9201 is capable of operating in
two operation modes; linear charge mode and pulse charge
mode. The ISL9201 functions as a traditional linear charger
when powered with a voltage source adapter. When
powered with a current-limited adapter, the charger functions
as a pulse charger by fully turning on the pass element and
the power dissipation is hence drastically reduced.
Constant Current Phase
The ISL9201 starts the charge at a constant current (CC)
phase. The charge current is regulated to fast charge the
battery before the final voltage has been reached. The
charge current is programmable with the IREF pin and has
two operation modes: trickle mode and constant current
mode, depending on the battery voltage. When the battery
voltage is lower than 2.8V, the charger operates in trickle
mode where the charge current is set at 10% of the constant
current mode current. The trickle mode is for preconditioning
a deeply discharged battery. Once the battery voltage is
above the typical 2.8V threshold, the constant current (CC)
mode starts. The constant current is programmable between
50mA to 1A.
Constant Voltage Phase
When the battery reaches the final voltage, the ISL9201
switches the operation to a constant voltage (CV) phase.
The output voltage is regulated at the final voltage value.
During the constant voltage phase, the charge current
reduces gradually as the cell voltage rises.
Charge Termination and Recharge
As the charge current reaches the EOC (end of charge)
current threshold during the constant voltage phase, the
STATUS pin open-drain FET is turned off to indicate an EOC
condition. The EOC current is fixed at 10% of the
programmed constant charge current. When the EOC
condition is reached, the STATUS pin is latched at logic
HIGH, the charger, however, will continue to charge the
battery until the EN pin is pulled to logic HIGH or the input
power has been removed. When the battery voltage falls to
150mV below the constant voltage value, the STATUS latch
will be reset and open-drain FET is turned on to indicate a
charging condition again. An internal delay is implemented
at the STATUS pin for both EOC and recharge conditions to
prevent nuisance trips due to noise and fast load current
transitions. The delay time is approximately one clock cycle
(varies between 0.5 and 1.5 clock) of the internal oscillator,
which is programmed by the timer capacitor. The typical
charge waveforms in Figure 1 show the complete cycle
operation.
Thermal Foldback
In the event where the die temperature reaches the thermal
foldback threshold (+110°C typical), the charge current is
reduced accordingly to prevent further temperature rise.
POR
The power-on reset (POR) function monitors the supply
voltage. The POR has a rising edge threshold of 3.6V typical
and 2.5V typical for falling edge. The charger is expected to
operate when the input voltage is above the POR threshold.
After POR the charger will continue to operate for supply
voltage down to 2.5V typical. It is also required that the
supply voltage be higher than the VBAT pin voltage by a
typical 80mV for the charger to function.
Oscillator
The ISL9201 incorporates with an oscillation circuit using an
external timing capacitor connected to the TIME pin. The
oscillator sets the delay time for the STATUS indication for
EOC and recharge conditions to prevent nuisance trip due to
in-rush currents.
Indications
The ISL9201 has an open-drain status indication pin. The
STATUS pin requires an external pull-up resistor to function
properly. The V2P8 pin can be used as the presence of AC
adapter.
Charger Disable
The EN pin allows the user to disable the charger. When the
charger is disabled, all internal circuits are shut down and
the quiescent current at the input pin is less than 150μA
typical.
Remote Battery Voltage Sensing
A kelvin sense pin is provided for battery terminal voltage
monitoring. Thus, the IR drop due to the connection leads
and PCB traces can be eliminated, resulting in a more
accurate battery voltage monitoring, especially when the
battery is located at a significant distance away from the
ISL9201. If remote sensing is not needed, the VSEN pin can
be connected to VBAT at the IC.
I
REF
TRICKLE
CC
CV
I
MIN
4.2V
TIME
2.8V
CHG
CHARGE
CURRENT
CHARGE
VOLTAGE
STATUS
INDICATION
V
REC
10% I
REF
FIGURE 1. TYPICAL CHARGE CYCLE WITH TIMEOUT
ISL9201
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| ISL9203A | Li-ion/Li Polymer Battery Charger |
| ISL9203ACRZ | Li-ion/Li Polymer Battery Charger |
| ISL9203ACRZ-T | Li-ion/Li Polymer Battery Charger |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL9203 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Li-ion/Li Polymer Battery Charger |
| ISL9203A | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Li-ion/Li Polymer Battery Charger |
| ISL9203ACRZ | 功能描述:IC CHRGR LI-ION/LI SGL 10-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR) |
| ISL9203ACRZ-T | 功能描述:IC CHRGR LI-ION/LI SGL 10-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR) |
| ISL9203CRZ | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Li-ion/Li Polymer Battery Charger |
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