CS8190EDWFR20 datasheet(6/8 Pages) CHERRY

Il numero della parte	CS8190EDWFR20

Spiegazioni elettronici	Precision Air-Core Tach/Speedo Driver with Return to Zero

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Produttore elettronici	CHERRY [Cherry Semiconductor Corporation]

Homepage	http://www.cherrycorp.com/

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T

PW

T-PW

FREQIN

ICP+

SQOUT

VCC

VREG

0

VCP+

6

3. Determine C4

C4 is selected to satisfy both the maximum allowable rip-

ple voltage and response time of the meter movement.

C4 =

With C4 = 0.47µF, the F/V ripple voltage is 44mV.

The last component to be selected is the return to zero

capacitor C2. This is selected by increasing the input sig-

nal frequency to its maximum so the pointer is at its max-

imum deflection and removing the power from the cir-

cuit. C2 should be large enough to ensure that the pointer

always returns to the 0¡ position rather than 360¡ under

all operating conditions.

Figure 7 shows how the CS8190 and the CS8441 are used

to produce a Speedometer and Odometer circuit.

CT(VREG Ð 0.7V)

VRIPPLE(MAX)

Circuit Description and Application Notes: continued

+

Ð

RT

C4

CPÐ

+

Ð

F/VOUT

F to V

2.0V

Q2

Q1

Q3

0.25V

CP+

R4

CT

VC(t)

+Ð

R3

VREG

SQOUT

QSQUARE

2.0V

FREQIN

Figure 5A: Partial Schematic of Input and Charge Pump

Figure 5B: Timing Diagram of FREQIN and ICP

Codice articolo simile - CS8190EDWFR20

Produttore elettronici	Il numero della parte	Scheda tecnica	Spiegazioni elettronici
ON Semiconductor	CS8190EDWFR20	103Kb / 12P	Precision Air-Core Tach/Speedo Driver March, 2001 ??Rev. 4
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	CS8190EDWFR20G	165Kb / 11P	Precision Air-Core Tach/Speedo Driver January, 2012 ??Rev. 7

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CS8190EDWFR20 Scheda tecnica(PDF) 6 Page - Cherry Semiconductor Corporation

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