KA2418 データシートの表示（PDF） - Wing Shing International Group

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KA2418

TONE RINGER WITH BRIDGE DIODE

Wing Shing International Group 

WS2418

TELEPHONE TONE

RINGER WITH BRIDGE DIODE

DC ELECTRICAL CHARATERISTICS (TA=25℃)

Symbol

Characteristics

Min. Typ. Max.

VCC Supply Voltage

26

ICC Current Consumption Without load

1.5

1.8

VON Activation Voltage

12.2

13

VONR Activation Voltage Range

8

10

VSUS Sustaining Voltage

8

8.8

RD(OFF) Different Resistance in OFF 6.4

Condition

VO(P-P) Output Voltage Swing

ISC Short Circuit Current

VCC-3

35

Units

V

mA

V

V

V

KΩ

V

mA

Test Conditions

VCC=8.8 to 26V

RA=1KΩ

VCC=26V

AC ELECTRICAL CHARACTERISTICS

Symbol

Characteristic

Min. Typ. Max.

Output Frequency

FH1

FH2

fH1R fH1 Range

fS Sweep Frequency

2300+300

1700+300

0.1

15

8

Units

HZ

KHz

HZ

Test Conditions

VCC=26V, R1=14KΩ

VC=0V(PIN3)

VC=6V(PIN3)

R1=27KΩ To 1.7KΩ

R1=14KΩ,C1=100nF

TEST AND APPLICATION CIRCUIT

TIP

1 F,250VAC 2.2K

C2

R2

TEL LINE

C3

10 F

VCC

RING

RA

0.22 F

8

6

5

7 WS2418

12

3

4

10K

Piezo

C1

R1

100nF

12K

10K

VOUT

f1=

3.12.275X.104

R1 (K )

, f2=

5

7

f1, fS=

10800

C1 (nF )

1300 :8

DESCRIPTION

The WS2418 tone ringer device its power supply by rectifying the AS ringing signal. It uses this

power to activate two tone generators. The two tone frequencies generators are switched by an internal

oscillator in a fast sequence and made audible across an output amplifier in the loudspeaker, both tone

frequencies and the switch frequency can be externally adjusted

The devices can driver either directly a piezo ceramic converter (buzzer) or small loudspeaker. In case

of using a loudspeaker, a transformer is need.4

An internal shunt voltage regulator provides DC voltage to the output stage, low frequency oscillator,

and high frequency oscillator. To protect the IC telephone line transients, a zener diode is include.

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