参数资料
型号: ISL6294IBZ
厂商: Intersil
文件页数: 5/9页
文件大小: 0K
描述: IC CHRGR LI-ION SGL 8-SOIC
标准包装: 490
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: 4.5 V ~ 6.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOIC
包装: 管件
ISL6294
VIN
V REF
V OS
BAT
BAT
POR
PRE
REG
VCC
PPR
EN
GND
200k
CHARGE
CONTROL
EN
VCC
V REF
DIE
TEMP
+115°C
4.2V
CHG
TRICKLE
IMIN
FIGURE 3. BLOCK DIAGRAM
CC
CV
IREF
I REF
2.55V
19%I REF
CHG
CHARGE
VOLTAGE
CHARGE
CURRENT
I MIN
CHG
76%I REF
INDICATION
TIME
FIGURE 4. TYPICAL CHARGE PROFILE
Description
The ISL6294 charges a Li-ion battery using a CC/CV profile.
The constant current I REF is set with the external resistor
R IREF (See Figure 1) and the constant voltage is fixed at
4.2V. If the battery voltage is below a typical 2.55V trickle-
charge threshold, the ISL6294 charges the battery with a
trickle current of 19% of I REF until the battery voltage rises
above the trickle charge threshold. Fast charge CC mode is
maintained at the rate determined by programming I REF until
the cell voltage rises to 4.2V. When the battery voltage
5
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 4 shows the typical charge waveforms
after the power is on.
The EOC current level I MIN is programmable with the
external resistor R IMIN (See Figure 1). The CHG signal turns
FN9174.4
July 9, 2007
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