参数资料
型号: MC33341P
厂商: ON Semiconductor
文件页数: 11/19页
文件大小: 0K
描述: IC CTRLR BATTERY FAST CHRG 8DIP
产品变化通告: LTB Notification 03/Jan/2008
标准包装: 1,000
功能: 充电管理
电池化学: 所有电池类型
电源电压: 2.3 V ~ 16 V
工作温度: -25°C ~ 85°C
安装类型: 通孔
封装/外壳: 8-DIP(0.300",7.62mm)
供应商设备封装: 8-PDIP
包装: 管件
其它名称: MC33341POS
MC33341
Source
Load
R3
R2
R S
8
7
6
5
1.2 V
Differential Amp
Disable Logic
V CC
0.4 V
1.2 V
V CC
V CC
V CC
R1
Opto
Isolator
R
Differential Amp
R
V CC
V sen
V th
I sen
I th
V
I
Transconductance
Amp
V CC
R
R
R
R
V CC
V CC
Reference
0.2 V 0.4 V 1.2 V
Battery or
Resistive
Load
V CC
Inverting Amp
0.2 V
1
2
3
4
Comp
Source
Return
Load
The above figure shows the MC33341 configured for load high?side current sensing allowing common paths for both power and ground,
between the source and load. The Differential Amplifier inputs, Pins 1 and 6, are used to sense the load induced voltage drop that appears
across resistor R S . The internal voltage and current regulation thresholds are selected by the respective external connections of Pins 2 and
6. Resistor R3 is required in applications where high peak levels of load current are possible from the battery or load bypass capacitor. The
resistor value should be chosen to limit the input current of the internal V CC clamp diode to less than 20 mA. Excessively large values for
R3 ill degrade the current sensing accuracy.
R2 ) 1
S
pk S
V reg + V
th(V) R1
I reg +
V
th(I HS)
R
R3 +
I
R
0.02
– 0.6
+ 1.2 R2 ) 1
+ 0.2
S
R1
R
Figure 18. Load High?Side Current Sensing with
Internally Fixed Current and Voltage Thresholds
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