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EL7584IR-T13 Datasheet(PDF) 11 Page - Intersil Corporation |
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EL7584IR-T13 Datasheet(HTML) 11 Page - Intersil Corporation |
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11 / 16 page  - + + - OSC - + R21 R22 VREF 3.3µF 0.1µF 5V TO 17V VDDN DRVN VSSN VDDP DRVP VSSP FBP FBN VFBP R11 R12 2.2µF 0.1µF 5V TO 17V VOFF VON RON IS 30 - 40Ω FOR VDD 6V TO 12V RONP RONN RONP RONN COUT2 CCPN CCPP COUT1 11 FN7317.2 February 4, 2005 Single Stage Charge Pump Positive Charge Pump Design Considerations A single stage charge pump is shown above. The maximum VON output voltage is determined by the following equation: VON max () 2V DDCPP - IOUT 2RONN ( RONP) - 2 VDIODE - IOUT 1 0.5 FS CCPP × × -------------------------------------------- × × + × × × - IOUT 1 0.5 FS COUT1 × × ------------------------------------------------ × ≤ where: •RONN and RONP resistance values depend on the VDDP voltage levels. For 12V supply, RON is typically 33Ω. For 6V supply, RON is typically 45Ω. 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 150m Ω. The figure below illustrates an implementation for two-stage positive charge pump circuit. EL7584 |
Similar Part No. - EL7584IR-T13 |
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