参数资料
型号: EL7583IR-T13
厂商: Intersil
文件页数: 12/16页
文件大小: 0K
描述: IC CONV DC/DC 3-CHAN 20-TSSOP
标准包装: 2,500
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: 带卷 (TR)
EL7583
Two-Stage Positive Charge Pump Circuit
V DDP
R ONP
DRNP
V BOOST
(5V-17V)
V LX
C CPP
V ON
R ONN
C CPP
C OUT1
C OUT1
V SSP
R 12
-
+
FBP
1.265V
+
-
R 11
V ON ( max ) ≤ 2 × V DDP - I OUT × 2 × ( R ONN + R ONP ) - 2 × V DIODE - I OUT × -------------------------------------------- - I OUT ×
0.5 × F × C
------------------------------------------------ + N × V LX ( max ) - N × ? 2 × V DIODE + I OUT × -------------------------------------------- + I OUT × ------------------------------------------------ ?
0.5 × F S × C OUT1 ?
0.5 × F S × C OUT1
0.5 × F S × C CPP
V ON = V FBP × ---------------------------
R
V OFF ( max ) ≥ I OUT × 2 × ( R ONN + R ONP ) + 2 × V DIODE - I OUT × -------------------------------------------- - I OUT × ------------------------------------------------ - V DDN
0.5 × F × C 0.5 × F × C
The maximum V ON output voltage for N+1 stage charge pump is:
1
S CPP
1 1 1
?
R 11 and R 12 set the V ON output voltage:
R 11 + R 12
11
where V FBP is 1.310V.
Negative Charge Pump Design Considerations
The criteria for the negative charge pump is similar to the
positive charge pump. For a single stage charge pump, the
maximum V OFF output voltage is:
1 1
S CPN S OUT2
Similar to positive charge pump, if additional stage is
required, the LX switching signal is recommended to drive
the additional charge pump diodes. The figure on the next
page shows a two stage negative charge pump circuit.
12
FN7335.5
May 12, 2006
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