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參數(shù)資料
| 型號： | ISL6291-2CRZ |
| 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-SOIC -40 to 85 |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16 |
| 封裝： | 5 X 5 MM, THERMALLY ENHANCED, LEAD FREE, PLASTIC, MO-220VHHB, QFN-16 |
| 文件頁數(shù)： | 7/11頁 |
| 文件大小： | 357K |
| 代理商： | ISL6291-2CRZ |
7
FN9102.2
May 2, 2005
Description
Initialization
The ISL6291 initializes as the input voltage rises above the
power-on-reset (POR) threshold. Once the input voltage
reaches the POR level, the V2P8 pin outputs a 2.8V voltage.
This output voltage can be used as an adapter presence
indication and to bias the thermistor circuit. The POR takes
about 200
μ
s. During the POR, the STATUS pin outputs a
logic HIGH signal, and the FAULT pin outputs a logic LOW
signal.
Operation States
Immediately after the POR, the charger enters a charge
state. A charge state always cycles through a trickle mode, a
constant-current mode, and a constant voltage mode, as
shown in Figure 1. If the battery completes a charge cycle
without a fault, the operation moves to the inhibit state,
waiting for the battery to be discharged to start another
charge cycle. Two types of fault may occur during a charge
cycle, namely, a TIMEOUT fault or a temperature fault (refer
to Functional Pin Description on TIME, TOEN, and TEMP
pins). If a fault occurs during the charge modes, the
operation enters the fault state. The charger is in a standby
state when the adapter is removed, or the EN pin of the IC is
pulled to LOW. In the standby state, the charger IC draws
less than 1
μ
A current from the battery. The two open-drain
pins, STATUS and FAULT, indicate the operation states of
the charger (see
Table 1
).
The charger starts a new charge cycle when a wall adapter
is plugged in, a new battery is inserted, a battery voltage
drops below the re-charge threshold, a temperature fault
ends, or the EN pin is toggled from LOW to HIGH.
Trickle Charge Mode
A charge cycle always starts with the trickle charge mode.
The trickle charge mode is to pre-condition the battery and
prepare it for the fast charge (constant current or constant
voltage charge). It is not recommended to fast charge a
Li-ion battery when the battery is deeply discharged,
indicated by a low battery voltage. When the ISL6291 sees a
battery voltage lower than the V
MIN
given in the Electrical
Specifications, it forces 1/10 of the current in the constant
current mode into the battery. The charger stays in the trickle
mode until the battery voltage is above V
MIN
for 15
consecutive oscillation cycles (T
OSC
). The 15-cycle delay is
to avoid entering the constant current mode accidentally,
caused by any transient voltage spike on the battery pack
terminals. The charge time for the trickle mode is limited to
1/8 of the TIMEOUT interval (see TIME pin description and
Figure 1). If the trickle charge time takes longer than 1/8 of
the TIMEOUT interval, a TIMEOUT fault is issued and the
charger is latched. The minimum trickle charge time is 15
T
OSC,
and the maximum time is 1/8 TIMEOUT. During the
trickle mode, the STATUS pin is set to logic LOW, and the
FAULT pin is set to logic HIGH.
Constant Current Charge Mode
The battery is charged with a constant current programmed
by the IREF pin resistor (see IREF pin description) during
the constant current mode. The constant current is trimmed
to 10% accuracy. The battery voltage rises towards the
charge termination voltage V
CH
in this mode. The constant
current mode ends when the battery voltage reaches V
CH
.
The internal clock counter limits the maximum time for the
constant current mode to the TIMEOUT interval. The counter
is reset at the beginning of the this charge mode. If the
TABLE 1. 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 1. MODES OF OPERATION
V
CH
V
RECHRG
TIME
0
0
TIMEOUT
Constant Voltage
Mode
Constant Current
Mode
Trickle
Mode
Inhibit
CC
Mode
CV
Mode
V
MIN
Trickle time
< 1/8 TIMEOUT
Trickle
Mode
I
REF
I
REF
/10
I
MIN
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PDF描述 |
|---|---|
| ISL6291-2CRZ-T | Octal D-Type Edge-Triggered Flip-Flops with 3-State Outputs 20-SOIC -40 to 85 |
| ISL6291EVAL1 | Li-ion/Li Polymer Linear Battery Charger |
| ISL6292(中文) | Li-ion/Li Polymer Battery Charger(鋰離子/鋰聚合物電池充電器) |
| ISL6292-1CR3 | 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 |
|---|---|
| ISL6291-2CRZ-T | 功能描述:IC BATT CHRGR LI-ION 4.2V 16-QFN 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(biāo)準(zhǔn)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) |
| ISL6291-2CRZTR5155 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Li-ion/Li Polymer Linear Battery Charger |
| ISL6291-2CRZTR5155-T | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Li-ion/Li Polymer Linear Battery Charger |
| ISL6291EVAL1 | 功能描述:EVALUATION BOARD FOR ISL6291 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估演示板和套件 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 |
| ISL6292 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Li-ion/Li Polymer Battery Charger |
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