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參數(shù)資料
| 型號： | ISL9203 |
| 廠商： | Intersil Corporation |
| 英文描述： | Li-ion/Li Polymer Battery Charger |
| 中文描述： | Li-ion/Li聚合物電池充電器 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 526K |
| 代理商： | ISL9203 |
13
FN6106.0
February 3, 2005
condition. The charger will resume charging after the fault
condition is removed. When the IREF is driven by a voltage
between 0.38V to 0.5V (typical value), the charge current is
limited to 100mA; or when driven to a voltage between 1.2V
to 1.5V, the charge current is limited to 500mA. For any
voltage between 0.5V to 1.2V, the charge current will drop to
a very low value. This feature can protect the charger from a
large charging current when IREF is accidentally shorted to
ground or to a high voltage. Figure 21 shows the charge
current when the IREF pin voltage is driven from 0V to 3V.
End-of-Charge (EOC) Current
The EOC current I
MIN
sets the level at which the charger
starts to indicate the end of the charge with the STATUS pin,
as shown in Figure 20. The charger actually does not
terminate charging until the end of the TIMEOUT, as
described in the Total Charge Time section. In the ISL9203,
the EOC current is internally set to 1/10 of the CC charge
current, that is,
(EQ. 7)
At the EOC, the STATUS signal rises to HIGH and is
latched. The latch is not reset until a recharge cycle or a new
charge cycle starts. The tolerance guidance for the EOC
current at selected R
IREF
values are given in Table 3. This
guidance is offered only for mass production tests in
customer’s products.
Charge Current Thermal Foldback
Over-heating is always a concern in a linear charger. The
maximum power dissipation usually occurs at the beginning
of a charge cycle when the battery voltage is at its minimum
but the charge current is at its maximum. The charge current
thermal foldback function in the ISL9203 frees users from
the over-heating concern.
Figure 22 shows the current signals at the summing node of
the current error amplifier CA in the Block Diagram. I
R
is the
reference. I
T
is the current from the Temperature Monitoring
block. The I
T
has no impact on the charge current until the
internal temperature reaches approximately 100°C; then I
T
rises at a rate of 1
μ
A/°C. When I
T
rises, the current control
loop forces the sensed current I
SEN
to reduce at the same
rate. As a mirrored current, the charge current is 100,000
times that of the sensed current and reduces at a rate of
100mA/°C. For a charger with the constant charge current
set at 1A, the charge current is reduced to zero when the
internal temperature rises to 110°C. The actual charge
current settles between 100°C to 110°C.
Usually the charge current should not drop below I
MIN
because of the thermal foldback. For some extreme cases if
that does happen, the charger does not indicate end-of-
charge unless the battery voltage is already above the
recharge threshold.
2.8V Bias Voltage
The ISL9203 provides a 2.8V voltage for biasing the internal
control and logic circuit. This voltage is also available for
external circuits such as the NTC thermistor circuit. The
maximum allowed external load is 2mA.
Indications
The ISL9203 has three indications: the input presence, the
charge status, and the fault indication. The input presence is
indicated by the V2P8 pin while the other two indications are
presented by the STATUS pin and FAULT pin respectively.
Figure 23 shows the V2P8 pin voltage vs. the input voltage.
Table 2 summarizes the other two pins.
FIGURE 21. CHARGE CURRENT WHEN IREF PIN IS DRIVEN
BY AN EXTERNAL VOLTAGE SOURCE
STATUS
5V/Div
IREF Pin Voltage
500mV/Div
Charge Current
200mA/Div
GND
GND
GND
Time Scale
40s/Div
I
MIN
1
10
------
I
REF
=
FIGURE 22. CURRENT SIGNALS AT THE AMPLIFIER CA
TEMPERATURE
100
O
C
I
R
I
T
I
SEN
ISL9203
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| ISL9203CRZ-TR5220 | 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 |
|---|---|
| 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 標準包裝: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 標準包裝: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 |
| ISL9203CRZR5220 | 功能描述:IC BATT CHARGER LI-ION 10-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標準包裝:2,000 系列:Impedance Track™ 功能:燃料，電量檢測計/監(jiān)控器 電池化學(xué):鋰離子（Li-Ion） 電源電壓:2.4 V ~ 2.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:20-TSSOP 包裝:帶卷 (TR) 產(chǎn)品目錄頁面:1020 (CN2011-ZH PDF) 配用:BQ27350EVM-ND - BQ27350EVM 其它名稱:296-21665-2 |
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