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參數(shù)資料
| 型號： | ISL6292-1CR5-T |
| 廠商： | INTERSIL CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Octal D-Type Edge-Triggered Flip-Flops with 3-State Outputs 20-TSSOP -40 to 85 |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16 |
| 封裝： | 5 X 5 MM, PLASTIC, MO-220VHHB, QFN-16 |
| 文件頁數(shù)： | 2/20頁 |
| 文件大小： | 550K |
| 代理商： | ISL6292-1CR5-T |
10
FN9105.9
December 17, 2007
Theory of Operation
The ISL6292 is an integrated charger for single-cell Li-ion or
Li-polymer batteries. The ISL6292 functions as a traditional
linear charger when powered with a voltage-source adapter.
When powered with a current-limited adapter, the charger
minimizes the thermal dissipation commonly seen in
traditional linear chargers.
As a linear charger, the ISL6292 charges a battery in the
popular constant current (CC) and constant voltage (CV)
profile. The constant charge current IREF is programmable up
to 2A (1.5A for the 3x3 DFN package) with an external resistor
or a logic input. The charge voltage VCH has 1% accuracy
over the entire recommended operating condition range. The
charger always preconditions the battery with 10% of the
programmed current at the beginning of a charge cycle, until
the battery voltage is verified to be above the minimum fast
charge voltage, VMIN. This low-current preconditioning
charge mode is named trickle mode. The verification takes 15
cycles of an internal oscillator whose period is programmable
with the timing capacitor. A thermal-foldback feature removes
the thermal concern typically seen in linear chargers. The
charger reduces the charge current automatically as the IC
internal temperature rises above +100°C to prevent further
temperature rise. The thermal-foldback feature guarantees
safe operation when the printed circuit board (PCB) is space
limited for thermal dissipation.
A TEMP pin monitors the battery temperature to ensure a
safe charging temperature range. The temperature range is
programmable with an external negative temperature
coefficient (NTC) thermistor. The TEMP pin is also used to
detect the removal of the battery.
The charger offers a safety timer for setting the fast charge time
(TIMEOUT) limit to prevent charging a dead battery for an
extensively long time. The TIMEOUT limit can be disabled as
needed by the TOEN pin. The trickle mode is limited to 1/8 of
TIMEOUT and cannot be disabled by the TOEN pin.
The charger automatically re-charges the battery when the
battery voltage drops below a recharge threshold. When the
wall adapter is not present, the ISL6292 draws less than 1A
current from the battery.
Three indication pins are available from the charger to
indicate the charge status. The V2P8 outputs a 2.8VDC
voltage when the input voltage is above the power-on reset
(POR) level and can be used as the power-present
indication. This pin is capable of sourcing a 2mA current, so
it can also be used to bias external circuits. The STATUS pin
is an open-drain logic output that turns LOW at the beginning
of a charge cycle until the end-of-charge (EOC) condition is
qualified. The EOC condition is: the battery voltage rises
above the recharge threshold and the charge current falls
below a user-programmable EOC current threshold. Once
the EOC condition is qualified, the STATUS output rises to
HIGH and is latched. The latch is released at the beginning
of a charge or re-charge cycle. The open-drain FAULT pin
turns low when any fault conditions occur. The fault
conditions include the external battery temperature fault, a
charge time fault, or the battery removal.
Figure 17 shows the typical charge curves in a traditional
linear charger powered with a constant-voltage adapter.
From 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 Equation 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 17 shows (with dotted lines) two cases
that the charge currents are limited by the maximum power
dissipation capability due to the thermal foldback.
FIGURE 17. TYPICAL CHARGE CURVES USING A
CONSTANT-VOLTAGE ADAPTER
V
CH
V
MIN
V
IN
I
REF
I
REF/10
P
1
P
2
P
3
Trickle
Mode
Constant Current
Mode
Constant Voltage
Mode
Inhibit
TIMEOUT
Input Voltage
Battery Voltage
Charge Current
Power Dissipation
P
CH
V
IN -VBAT
() I
CHARGE
=
(EQ. 1)
FIGURE 18. TYPICAL CHARGE CURVES USING A CURRENT-
LIMITED ADAPTER
V
CH
V
MIN
V
IN
I
REF
I
REF/10
P
1
P
2
I
LIM
Trickle
Mode
Constant Current
Mode
Constant Voltage
Mode
Inhibit
TIMEOUT
Input Voltage
Battery Voltage
Charge Current
Power Dissipation
ISL6292
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| ISL6292-1CR5Z | 功能描述:電池管理 LD VER OF ISL6292-1C R5 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 |
| ISL6292-1CR5Z-T | 功能描述:電池管理 LD VER OF ISL6292-1C R5-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 |
| ISL6292-2CR3 | 功能描述:IC CHARGER LI-ION 2.4V 10-DFN RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標準包裝:1 系列:- 功能:充電管理 電池化學: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 |
| ISL6292-2CR3-T | 功能描述:IC BATT CHRGR LI-ION 4.2V 10-DFN RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標準包裝:1 系列:- 功能:充電管理 電池化學: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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