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參數(shù)資料
| 型號(hào)： | ISL9204 |
| 廠商： | Intersil Corporation |
| 英文描述： | High Input Voltage Charger |
| 中文描述： | 高輸入電壓充電器 |
| 文件頁數(shù)： | 7/10頁 |
| 文件大?。?/td> | 261K |
| 代理商： | ISL9204 |
7
FN9207.0
October 4, 2005
Description
The ISL9204 charges a Li-ion battery with a constant current
(CC) or a constant voltage (CV). The constant current I
REF
is set with the external resistor R
IREF
(see Figure 9) and the
constant voltage is fixed at 4.2V. If the battery voltage is
below a typical 2.8V trickle-charge threshold, the ISL9204
charges the battery with a trickle current until the battery
voltage rises above the trickle charge threshold. When the
battery voltage reaches 4.2V, the charger enters a CV mode
and regulates the battery voltage at 4.2V to fully charge the
battery without the risk of over charge. Upon reaching an
end-of-charge (EOC) current, the charger indicates the
charge completion with the CHG pin, but the charger
continues to output the 4.2V voltage. Figure 12 shows the
typical charge profile and the EOC/reset event.
The EOC current level I
MIN
is programmable with the
external resistor R
IMIN
(see Figure 9). The CHG signal turns
to LOW when the trickle charge starts and rises to HIGH at
the EOC. After the EOC is reached, the charge current has
to rise to typically 73% I
REF
for the CHG signal to turn on
again, as shown in Figure 12. The current surge after EOC
can be caused by a load connected to the battery.
A thermal foldback function reduces the charge current
anytime when the die temperature reaches typically 115°C.
This function guarantees safe operation when the printed-
circuit board (PCB) is not capable of dissipating the heat
generated by the linear charger. The ISL9204 accepts an
input voltage up to 28V but disables charging when the input
voltage exceeds the OVP threshold, minimum 10V, to
protect against unqualified or faulty AC adapters.
PPR Indication
The PPR pin is an open-drain output to indicate the
presence of the AC adapter. Whenever the input voltage is
higher than the POR threshold, the PPR pin turns on the
internal open-drain MOSFET to indicate a logic LOW signal,
independent on the EN-pin input. When the internal open-
drain FET is turned off, the PPR pin should leak less than
1
μ
A current. When turned on, the PPR pin should be able to
sink at least 10mA current under all operating conditions.
The PPR pin can be used to drive an LED (see Figure 9) or
to interface with a microprocessor.
Power-Good Range
The power-good range is defined by the following three
conditions:
1. VIN > VPOR
2. VIN - VBAT > VOS
3. VIN < VOVP
where the VOS is the offset voltage for the input and output
voltage comparator, discussed shortly, and the VOVP is the
overvoltage protection threshold given in the Electrical
Specification. All V
POR
, V
OS
, and V
OVP
have hysteresis, as
given in the Electrical Specification table. The charger will
not charge the battery if the input voltage is not in the
power-good range.
Input and Output Comparator
The charger will not be enabled unless the input voltage is
higher than the battery voltage by an offset voltage VOS.
The purpose of this comparator is to ensure that the charger
is turned off when the input power is removed from the
charger. Without this comparator, it is possible that the
charger will fail to power down when the input is removed
and the current can leak through the PFET pass element to
continue biasing the POR and the Pre-Regulator blocks
shown in the Block Diagram.
FIGURE 12. TYPICAL CHARGE PROFILE
I
REF
TRICKLE
CC
CV
I
MIN
4.2V
TIME
3.0V
CHG
CHARGE
CURRENT
CHARGE
VOLTAGE
CHG
INDICATION
73% I
REF
17% I
REF
ISL9204
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL9204IRZ-T | High Input Voltage Charger |
| ISL9205BIRZ | Li-ion Battery Charger |
| ISL9205BIRZ-T | Li-ion Battery Charger |
| ISL9205CIRZ | Li-ion Battery Charger |
| ISL9205CIRZ-T | Li-ion Battery Charger |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL9204EVAL1 | 功能描述:EVALUATION BOARD 1 ISL9204 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:- 標(biāo)準(zhǔn)包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發(fā)器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板 |
| ISL9204EVAL1Z | 制造商:Intersil Corporation 功能描述:EVAL BD FOR ISL9204, HIGH INPUT VOLT CHGR - Bulk |
| ISL9204IRZ-T | 功能描述:IC VOLTAGE CHARGER LI-ION 8-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:2,000 系列:Impedance Track™ 功能:燃料，電量檢測計(jì)/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 |
| ISL9205 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Li-ion Battery Charger |
| ISL9205_0705 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Li-ion Battery Charger |
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