参数资料
型号: EL7583IRZ
厂商: Intersil
文件页数: 11/16页
文件大小: 0K
描述: IC CONV DC/DC 3-CHAN 20-TSSOP
标准包装: 148
应用: 转换器,TFT,LCD
输入电压: 2.7 V ~ 14 V
输出数: 2
输出电压: 5 V ~ 17 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 20-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 20-TSSOP
包装: 管件
EL7583
Single Stage Charge Pump
5V TO
17V
0.1μF
V DDN
V DDP
5V TO
17V
R ONP
DRVN
OSC
R ONP
DRVP
0.1μF
C CPP
C CPN
C OUT1 ON
V OFF
C OUT2
3.3μF
R 21
R ONN
V SSN
FBN
+
-
R ONN
V SSP
FBP
R 12
V
2.2μF
-
+
+
-
V FBP
R 11
V ON ( max ) ≤ 2 × V DDCPP - I OUT × 2 × ( R ONN + R ONP ) - 2 × V DIODE - I OUT × -------------------------------------------- - I OUT × ------------------------------------------------
0.5 × F × C 0.5 × F × C
R ON IS 30 - 40 ? FOR V DD 6V TO 12V
R 22
V REF
Positive Charge Pump Design Considerations
A single stage charge pump is shown above. The maximum
V ON output voltage is determined by the following equation:
1 1
S CPP S OUT1
where:
? R ONN and R ONP resistance values depend on the V DDP
voltage levels. For 12V supply, R ON is typically 33 ? . For
6V supply, R ON is typically 45 ? .
If additional stage is required, the LX switching signal is
recommended to drive the additional charge pump diodes.
The drive impedance at the LX switching is typically 220m ? .
The figure below illustrates an implementation for two-stage
positive charge pump circuit.
11
FN7335.5
May 12, 2006
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