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参数资料
| 型号： | ISL6292DCRZ-T |
| 厂商： | INTERSIL CORP |
| 元件分类： | 电源管理 |
| 英文描述： | Li-ion/Li Polymer Battery Charger |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16 |
| 封装： | 4 X 4 MM, LEAD FREE, PLASTIC, MO-220-VGGC, QFN-16 |
| 文件页数： | 2/13页 |
| 文件大小： | 461K |
| 代理商： | ISL6292DCRZ-T |
10
End-of-Charge (EOC) Current
The end-of-charge current IMIN sets the level at which the
charger indicates the end of the charge with the STAT1 and
STAT2 pins, as shown in Figure 4. The charger terminates at
this moment. The IMIN is set in two ways, by connecting a
resistor between the IMIN pin and ground, or by connecting
the IMIN pin to the V2P8 pin. When programming with the
resistor, the IMIN is set in the equation below.
(EQ. 6)
where RIMIN is the resistor connected between the IMIN pin
and the ground. When connected to the V2P8 pin, the IMIN
is set to 1/10 of IREF, except when the IREF pin is shorted to
GND. Under this exception, IMIN is 5mA.
Charge Current Thermal Foldback
Over-heating is always a concern in a linear charger. The
maximum power dissipation usually occurs at the beginning
of a charge cycle when the battery voltage is at its minimum
but the charge current is at its maximum. The charge current
thermal foldback function in the ISL6292D frees users from
the over-heating concern.
Figure 5 shows the current signals at the summing node of
the current error amplifier CA in the Block Diagram. IR is the
reference. IT is the current from the Temperature Monitoring
block. The IT has no impact on the charge current until the
internal temperature reaches approximately 100°C; then IT
rises at a rate of 1
A/°C. When IT rises, the current control
loop forces the sensed current ISEN 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 IMIN
because of the thermal foldback. For some extreme cases if
that does happen, the charger does not indicate end-of-
charge unless the battery voltage is already above the
recharge threshold.
2.8V Bias Voltage
The ISL6292D provides a 2.8V voltage for biasing the
internal control and logic circuit. This voltage is also
available for external circuits such as the NTC thermistor
circuit. The maximum allowed external load is 2mA.
NTC Thermistor
The ISL6292D uses two comparators (CP2 and CP3) to form
a window comparator, as shown in Figure 7. When the TEMP
pin voltage is “out of the window,” determined by the VTMIN
and VTMAX, the ISL6292D stops charging and indicates a
fault condition. When the temperature returns to the set range,
the charger re-starts a charge cycle. The two MOSFETs, Q1
and Q2, produce hysteresis for both upper and lower
thresholds. The temperature window is shown in Figure 6.
IMIN
10000
VREF
RIMIN
----------------
0.8V
RIMIN
----------------
4
×10 A
()
=
=
FIGURE 5. CURRENT SIGNALS AT THE AMPLIFIER CA INPUT
Temperature
100OC
I
R
I
T
I
SEN
FIGURE 6. CRITICAL VOLTAGE LEVELS FOR TEMP PIN
3.0V
V
TMIN (1.50V)
0V
Under
Temp
Over
Temp
TEMP
Pin
Voltage
V
TMIN-
(1.286V)
V
TMAX (0.605V)
V
TMAX+ (0.660V)
+
-
+
-
V2P8
TEMP
GND
2.8V
R2
R3
R4
R5
Q1
Q2
CP2
CP3
Under
Temp
Over
Temp
ISL6292D
R
U
To TEMP Pin
V
TMIN
V
TMAX
RT
+
-
R1
Battery
Removal
CP1
V
RMV
FIGURE 7. THE INTERNAL AND EXTERNAL CIRCUIT FOR
THE NTC INTERFACE
ISL6292D
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6292EVAL1 | 功能描述:EVALUATION BOARD 1 ISL6292 RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 传感器类型:CMOS 成像，彩色（RGB） 传感范围:WVGA 接口:I²C 灵敏度:60 fps 电源电压:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相关产品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
| ISL6292EVAL1Z | 功能描述:EVAL BOARD 1 FOR ISL6292 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:* 标准包装:1 系列:PCI Express® (PCIe) 主要目的:接口，收发器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要属性:- 次要属性:- 已供物品:板 |
| ISL6292EVAL2 | 功能描述:EVALUATION BOARD 2 ISL6292 RoHS:否 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:PCI Express® (PCIe) 主要目的:接口，收发器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要属性:- 次要属性:- 已供物品:板 |
| ISL6292EVAL2Z | 功能描述:EVALUATION BOARD FOR ISL6292 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:PCI Express® (PCIe) 主要目的:接口，收发器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要属性:- 次要属性:- 已供物品:板 |
| ISL6293 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Li-ion/Li Polymer Battery Charger Accepting Two Power Sources |
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