ICL7660S Просмотр технического описания (PDF) - Intersil

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Компоненты Описание

производитель

ICL7660S

Super Voltage Converters

Intersil 

ICL7660S, ICL7660A

Typical Performance Curves

See Figure 12, “ICL7660S Test Circuit” on page 7) and Figure 13 “ICL7660A Test Circuit” on page 7 (Continued)

V+ = 5V

TA = +25°C

400 I = 10mA

C1 = C2 = 1mF

C1 = C2 = 10mF

300

C1 = C2 = 100mF

200

100

0

100

1k

10k

100k

OSCILLATOR FREQUENCY (Hz)

FIGURE 11. OUTPUT SOURCE RESISTANCE AS A FUNCTION OF OSCILLATOR FREQUENCY

NOTE:

14. These curves include, in the supply current, that current fed directly into the load RL from the V+ (see Figure 12). Thus, approximately half the

supply current goes directly to the positive side of the load, and the other half, through the ICL7660S and ICL7660A, goes to the negative side

of the load. Ideally, VOUT ∼ 2VIN, IS ∼ 2IL, so VIN x IS ∼ VOUT x IL.

V+

C1 +

10µF -

1

8

2 ICL7660S 7

3

6

4

5

IS V+

(+5V)

IL

RL

-VOUT

C2 -

10µF +

NOTE: For large values of COSC (>1000pF), the values of C1 and C2

should be increased to 100µF.

FIGURE 12. ICL7660S TEST CIRCUIT

C1 +

10µF-

1

8

2 ICL7660A 7

3

6

4

5

COSC

(NOTE)

C2 -

10µF +

IS V+

(+5V)

IL

RL

-VOUT

NOTE: For large values of COSC (>1000pF) the values of C1 and C2

should be increased to 100μF.

FIGURE 13. ICL7660A TEST CIRCUIT

7

FN3179.7

January 23, 2013

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