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參數(shù)資料
| 型號： | ISL6292-2CR3Z-T |
| 廠商： | INTERSIL CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Li-ion/Li Polymer 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)： | 14/19頁 |
| 文件大小： | 647K |
| 代理商： | ISL6292-2CR3Z-T |
14
FN9105.6
July 25, 2005
Shutdown
The ISL6292 can be shutdown by pulling the EN pin to
ground. When shut down, the charger draws typically less
than 30
μ
A current from the input power and the 2.8V output
at the V2P8 pin is also turned off. The EN pin needs be
driven with an open-drain or open-collector logic output, so
that the EN pin is floating when the charger is enabled.
Input and Output Capacitor Selection
Typically any type of capacitors can be used for the input
and the output. Use of a 0.47
μ
F or higher value ceramic
capacitor for the input is recommended. When the battery is
attached to the charger, the output capacitor can be any
ceramic type with the value higher than 0.1
μ
F. However, if
there is a chance the charger will be used as an LDO linear
regulator, a 10
μ
F tantalum capacitor is recommended.
Current-Limited Adapter
Figure 24 shows the ideal current-voltage characteristics of
a current-limited adapter. V
NL
is the no-load adapter output
voltage and V
FL
is the full load voltage at the current limit
I
LIM
. Before its output current reaches the limit I
LIM
, the
adapter presents the characteristics of a voltage source. The
slope r
O
represents the output resistance of the voltage
supply. For a well regulated supply, the output resistance
can be very small, but some adapters naturally have a
certain amount of output resistance.
The adapter is equivalent to a current source when running
in the constant-current region. Being a current source, its
output voltage is dependent on the load, which, in this case,
is the charger and the battery. As the battery is being
charged, the adapter output rises from a lower voltage in the
current-voltage characteristics curve, such as point A, to
higher voltage until reaching the breaking point B, as shown
in Figure 24.
The adapter is equivalent to a voltage source with output
resistance when running in the constant-voltage region;
because of this characteristic. As the charge current drops,
the adapter output moves from point B to point C, shown in
Figure 24.
The battery pack can be approximated as an ideal cell with a
lumped-sum resistance in series, also shown in Figure 24.
The ISL6292 charger sits between the adapter and the
battery.
Working with Current-Limited Adapter
As described earlier, the ISL6292 minimizes the thermal
dissipation when running off a current-limited ac adapter, as
shown in Figure 18. The thermal dissipation can be further
reduced when the adapter is properly designed. The
following demonstrates that the thermal dissipation can be
minimized if the adapter output reaches the full-load output
voltage (point B in Figure 24) before the battery pack voltage
reaches the final charge voltage (4.1V or 4.2V). The
assumptions for the following discussion are: the adapter
current limit = 750mA, the battery pack equivalent
resistance = 200m
, and the charger ON resistance is
350m
.
TABLE 2. STATUS INDICATIONS
FAULT STATUS
INDICATION
High
High
Charge completed with no fault (Inhibit) or
Standby
High
Low
Charging in one of the three modes
Low
High
Fault
*Both outputs are pulled up with external resistors.
FIGURE 24. THE IDEAL I-V CHARACTERISTICS OF A
CURRENT LIMITED ADAPTER
V
NL
V
FL
I
LIM
r
O
NL
I
LIM
r
O
=(V
NL
- V
FL
)/I
LIM
V
PACK
V
CELL
R
PACK
A
B
C
(A) THE EQUIVALENT CIRCUIT IN THE
CONSTANT CURRENT REGION
(C) THE EQUIVALENT CIRCUIT WHEN THE
PACK VOLTAGE REACHES THE FINAL
CHARGE VOLTAGE
V
ADAPTER
V
PACK
V
CELL
R
DS(ON)
R
PACK
Charger
I
Adapter
I
LIM
Battery
Pack
(B) THE EQUIVALENT CIRCUIT IN THE
RESISTANCE-LIMIT REGION
V
ADAPTER
V
PACK
V
CELL
R
PACK
Charger
I
r
O
Adapter
V
NL
Battery
Pack
R
DS(ON)
V
ADAPTER
V
PACK
V
CELL
R
PACK
Charger
I
r
O
Adapter
V
NL
Battery
Pack
4.2V DC
Output
FIGURE 25. THE EQUIVALENT CIRCUIT OF THE CHARGING SYSTEM WORKING WITH CURRENT LIMITED ADAPTERS
ISL6292
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL6292-1CR5Z-T | Li-ion/Li Polymer Battery Charger |
| ISL6292-2CR5Z-T | Li-ion/Li Polymer Battery Charger |
| ISL6292-1CR5Z | Octal D-Type Edge-Triggered Flip-Flops with 3-State Outputs 20-TSSOP -40 to 85 |
| ISL6292-2CR3 | Octal D-Type Edge-Triggered Flip-Flops with 3-State Outputs 20-TSSOP -40 to 85 |
| ISL6292-2CR3-T | Li-ion/Li Polymer Battery Charger |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL6292-2CR4 | 功能描述:IC BATT CHRGR LI-ION 4.2V 16-QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 功能:充電管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:3.75 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:669 (CN2011-ZH PDF) 其它名稱:MCP73831T-2ACI/OTCT |
| ISL6292-2CR4-T | 功能描述:IC BATT CHRGR LI-ION 4.2V 16-QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 功能:充電管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:3.75 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:669 (CN2011-ZH PDF) 其它名稱:MCP73831T-2ACI/OTCT |
| ISL6292-2CR4Z | 功能描述:電池管理 LD VER OF ISL6292-2C R4 RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| ISL6292-2CR4Z-T | 功能描述:電池管理 LD VER OF ISL6292-2CR4-T RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| ISL6292-2CR5 | 功能描述:IC BATT CHRGR LI-ION 4.2V 16-QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 功能:充電管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:3.75 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:669 (CN2011-ZH PDF) 其它名稱:MCP73831T-2ACI/OTCT |
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