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TC1121CUA Arkusz danych(PDF) 7 Page - Microchip Technology |
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TC1121CUA Arkusz danych(HTML) 7 Page - Microchip Technology |
7 / 14 page © 2006 Microchip Technology Inc. DS21358C-page 7 TC1121 3.6 Combined Positive Supply Multiplication and Negative Voltage Conversion Figure 3-4 shows this dual function circuit, in which capacitors C1 and C2 perform pump and reservoir functions to generate negative voltage. Capacitors C3 and C4 are the respective capacitors for multiplied positive voltage. This particular configuration leads to higher source impedances of the generated supplies due to the finite impedance of the common charge-pump driver. FIGURE 3-4: Combined Positive Multiplier and Negative Converter C1 D1 D2 D1, D2 = 1N4148 4 3 6 8 5 2 C2 C4 C3 VIN + VOUT = (2VIN) – (VFD1) – (VFD2) TC1121 GND OSC CAP+ CAP– FC SHDN VOUT VIN SHDN* VOUT = VIN – *SHDN should be tied to VIN if not used. + + + + |
Podobny numer części - TC1121CUA |
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Podobny opis - TC1121CUA |
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