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參數(shù)資料
| 型號： | ISL6297CRZ |
| 廠商： | INTERSIL CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Dual Positive-Edge-Triggered D-Type Flip-Flops With Clear and Preset 14-TSSOP -40 to 85 |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16 |
| 封裝： | 4 X 4 MM, ROHS COMPLIANT, PLASTIC, MO-220VGGC, QFN-16 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 432K |
| 代理商： | ISL6297CRZ |
12
FN9215.0
September 27, 2005
yellow. Once the charge begins, the ISL6297 pulls the RED
pin low to drive a red indicator. Once the charge properly
finishes (either when the EOC condition is qualified or when
the TIMEOUT completes) the ISL6297 releases the RED
output and pulls the GRN pin low to drive a green indicator
while the red indicator turns off. The green LED remains on
unless the input power is recycled, or a fault occurs. During
a recharge operation, the indicator remains green.
When a temperature fault happens, both the RED and the
GRN pins turn on to indicate a yellow color.
This fault is
cleared automatically when the temperature again returns to
the normal region. If the FAULT is non-temperature related,
the yellow indicator flashes. This type of fault is latched and
can only be reset by toggling the EN pin or cycling the input
power. Table 2 summarizes the LED indications.
Because the LED outputs provide a constant 10mA current
sink, no external resistors are necessary.
VSEN Pin
When the charger is providing a large current to the cell,
there can be significant voltage drop in the PCB trace
between the charger output and the battery positive terminal.
To minimize this effect, the VSEN pin input provides a low
current monitoring path. This provides a more accurate
reading of the battery voltage. Figure 7 shows the internal
voltage feedback circuit.
THERMAGUARD Charge Current Thermal
Foldback
Over-heating is always a concern in a linear charger or in the
linear region for a dual mode charger. The charge current
thermal foldback function in the ISL6297 frees users from
the over-heating concern.
Figure 8 shows the current signals at the summing node of
the current error amplifier CA in the Block Diagram. I
R
is the
reference. I
T
is the current from the Temperature Monitoring
block. The I
T
has no impact on the charge current until the
internal temperature reaches approximately 100°C; then I
T
rises at a rate of 1
μ
A/°C. When I
T
rises, the current control
loop forces the sensed current I
SEN
to reduce at the same
rate. As a mirrored current, the charge current is 100,000
times that of the sensed current and reduces at a rate of
100mA/°C. For a charger with the constant charge current
set at 1A, the charge current is reduced to zero when the
internal temperature rises to 110°C. The actual charge
current settles between 100°C to 110°C.
Usually the charge current should not drop below I
MIN
because of the thermal foldback. If, in some extreme case
this does happen, the charger does not indicate end-of-
charge unless the battery voltage is already above the
recharge threshold.
TABLE 2. LED INDICATION SUMMARY
STATUS
RED GRN
INDICATION
Plug In Indication
L
H
Red (500ms)
H
L
Green (500ms)
L
L
Yellow (500ms)
H
H
Off (500ms)
Charging
L
H
Red
Full Charge (EOC) or recharging
H
L
Green
Short circuit Error or trickle charge
TIMEOUT error
L
L
Yellow (Flashing
1Hz rate)
H
H
Over/Under Ambient Temperature
L
L
Yellow
Idle state
H
H
Off or Battery (+)
terminal not
connected
FIGURE 7. THE INTERNAL VOLTAGE FEEDBACK CIRCUIT
+
-
BAT
VSEN
R2
Q1
R3
VA
Enable
V
REF
FIGURE 8. CURRENT SIGNALS AT THE AMPLIFIER CA INPUT
Temperature
100
O
C
I
R
I
T
I
SEN
ISL6297
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ISL6297CRZ-T | 功能描述:IC CHARGER LI-ION POLYMER 16-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 其它有關文件:STC3100 View All Specifications 特色產品:STC3100 - Battery Monitor IC 標準包裝:4,000 系列:- 功能:燃料，電量檢測計/監(jiān)控器 電池化學:鋰離子（Li-Ion） 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應商設備封裝:8-MiniSO 包裝:帶卷 (TR) 其它名稱:497-10526-2 |
| ISL6298 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Li-ion/Li-Polymer Battery Charger |
| ISL6298_06 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Li-ion/Li-Polymer Battery Charger |
| ISL6298-2CR3 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Li-ion/Li-Polymer Battery Charger |
| ISL6298-2CR3Z | 功能描述:IC CHARGER LI-ION 4.2V 3X3 10DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學: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 供應商設備封裝:SOT-6 包裝:帶卷 (TR) |
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