NT7501 データシートの表示（PDF） - Novatek Microelectronics

部品番号

コンポーネント説明

一致するリスト

NT7501

33 X 100 RAM-Map LCD Controller/Driver

Novatek Microelectronics 

NT7501

Booster Circuit

If capacitors C1 are connected between CAP1+ and CAP1-,

CAP2+ and CAP2-, or between CAP1- and CAP3+ and

between VSS and VOUT, the potential between VDD and VSS

is boosted by four times toward the positive side and it is

output at VOUT.

For triple boosting, remove only the capacitor between

CAP1- and CAP3+ from the connection of the quadruple

boosting operation and then short between CAP3- and

VOUT. The triple boosted voltage appears at VOUT (CAP3+).

For double boosting, remove only capacitor C1 between

CAP2+ and CAP2- from the connection of triple boosting

operation, open CAP2- and short between CAP2+, CAP3+

and VOUT. The double boosted voltage is output at VOUT

(CAP3+, CAP2+).

For quadruple boosting, set a VDD voltage range so that the

voltage at VOUT may not exceed the absolute maximum

rating.

As the booster circuit uses signals from the oscillator circuit,

the oscillator circuit must be operative.

VSS

C1

VOUT

CAP3+

C1

CAP1-

C1

CAP1+

CAP2+

C1

CAP2-

4x step-up voltage circuit

VDD = 2.4V

VSS = 0V

4x step-up voltage relationships

VSS

C1

VOUT

CAP3+

CAP1-

C1

CAP1+

CAP2+

C1

CAP2-

3x step-up voltage circuit

VOUT = 3 X VDD = 9V

VDD = 3V

VSS = 0V

3x step-up voltage relationships

VSS

C1

VOUT

CAP3+

CAP1-

C1

CAP1+

CAP2+

CAP2-

2x step-up voltage circuit

VOUT = 2 X VDD = 6V

VDD2 = 3V

VSS = 0V

2x step-up voltage relationships

13

Share Link: