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参数资料
| 型号： | ISL6292-2CR4Z |
| 厂商： | INTERSIL CORP |
| 元件分类： | 电源管理 |
| 英文描述： | Dual Positive-Edge-Triggered D-Type Flip-Flops With Clear and Preset 14-SOIC -40 to 85 |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16 |
| 封装： | 4 X 4 MM, ROHS COMPLIANT, PLASTIC, MO-220VGGC, QFN-16 |
| 文件页数： | 9/19页 |
| 文件大小： | 647K |
| 代理商： | ISL6292-2CR4Z |
9
FN9105.6
July 25, 2005
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 I
REF
is programmable
up to 2A (1.5A for the 3x3 DFN package) with an external
resistor or a logic input. The charge voltage V
CH
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, V
MIN
. 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 1
μ
A
current from the battery.
Three indication pins are available from the charger to
indicate the charge status. The V2P8 outputs a 2.8V dc
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 the 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 P
CH
is given by the following equations:
(EQ. 1)
where I
CHARGE
is the charge current. The maximum power
dissipation occurs during the beginning of the CC mode. The
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
-V
BAT
(
)
I
CHARGE
=
FIGURE 18. TYPICAL CHARGE CURVES USING A CURRENT-
LIMITED ADAPTER
V
CH
V
MIN
V
IN
I
REF
I
LIM
I
REF
/10
P
1
P
2
Trickle
Mode
Constant Current
Mode
Constant Voltage
Mode
Inhibit
TIMEOUT
Input Voltage
Battery Voltage
Charge Current
Power Dissipation
ISL6292
相关PDF资料 |
PDF描述 |
|---|---|
| ISL6292-2CR5 | Li-ion/Li Polymer Battery Charger |
| ISL6292-2CR5-T | Dual Positive-Edge-Triggered D-Type Flip-Flops With Clear and Preset 14-SSOP -40 to 85 |
| ISL6292-2CR5Z | Dual Positive-Edge-Triggered D-Type Flip-Flops With Clear and Preset 14-SSOP -40 to 85 |
| ISL6292 | Li-ion/Li Polymer Battery Charger |
| ISL6292-1CR3Z | Octal D-Type Edge-Triggered Flip-Flops with 3-State Outputs 20-PDIP -40 to 85 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6292-2CR4Z-T | 功能描述:电池管理 LD VER OF ISL6292-2CR4-T RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| ISL6292-2CR5 | 功能描述:IC BATT CHRGR LI-ION 4.2V 16-QFN RoHS:否 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:1 系列:- 功能:充电管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:3.75 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SC-74A，SOT-753 供应商设备封装:SOT-23-5 包装:剪切带 (CT) 产品目录页面:669 (CN2011-ZH PDF) 其它名称:MCP73831T-2ACI/OTCT |
| ISL6292-2CR5-T | 功能描述:IC BATT CHRGR LI-ION 4.2V 16-QFN RoHS:否 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:1 系列:- 功能:充电管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:3.75 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SC-74A，SOT-753 供应商设备封装:SOT-23-5 包装:剪切带 (CT) 产品目录页面:669 (CN2011-ZH PDF) 其它名称:MCP73831T-2ACI/OTCT |
| ISL6292-2CR5Z | 功能描述:电池管理 LD VER OF ISL6292-2CR5 RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| ISL6292-2CR5Z-T | 功能描述:电池管理 LD VER OF ISL6292-2CR5-T RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
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