71598RM(KI) No. 5920-4/5

Test Circuit

1

2

3

4

5

6

7

＋

＋

＋

8

9

10

11

12

13

14

0.33μF

D1

0.33μF

0.33μF

4.7μF

4.7μF

150pF

10nF

47μF

V-14

R-1

NC

NC

NC

Charge pump

1

Charge pump

2

Charge pump

3

Oscillator

Switching

circuit

30V zener

diode circuit

A11012

V-7

Current consumption

Output voltage

Output voltage fluctuation

Output current

I

OUT

I

IN

V

OUT

△V

OUT

Connect a DC current generator to V-7 and use an

ammeter to measure the current supplied to V-14 when

1mA is drawn from V-7.

Mesure voltage at V-7.

Vary power supply voltage from 4.75 to 5.25V. Measure

voltage change at V-7.

Measure output current required to obtain 29V from V-7.

Measure frequency of pulse wave form at R-1.

Item

Symbol

Test method

V-7

V-14

V-7

V-7

V-7

Measurement

point

Oscillation frequency

f

R-1

Output current (mA)

-

1.0

1.0

1.0

1.0

Test Method

LA7995M