Rainbow-electronics MAX1748 Manual do Utilizador descarregar pdf (Página 10)

MAX1748

Triple-Output TFT LCD DC-DC Converter

10 ______________________________________________________________________________________

GND

PGND

REF

0.22µF

SUPN

= 2.7V TO 13V

POS

= (R5 / R6) x V

REF

= 1.25V

SUPN

OSC

NEG

DRVN

FBN

REF

MAX1748

REF

1.25V

Figure 2. Negative Charge-Pump Block Diagram

GND

PGND

REF

1.25V

SUPP

= 2.7V TO 13V

POS

= [1 + (R3 / R4)] x V

REF

= 1.25V

SUPP

OSC

POS

DRVP

FBP

MAX1748

Figure 3. Positive Charge-Pump Block Diagram

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 16

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Rainbow-electronics MAX1748 Manual do Utilizador Página 10