KA3843B datasheet(6/10 Pages) FAIRCHILD

Numer części	KA3843B

Szczegółowy opis	SMPS Controller

Download	10 Pages

Scroll/Zoom	100%

Producent	FAIRCHILD [Fairchild Semiconductor]

Strona internetowa	http://www.fairchildsemi.com

Logo

6 / 10 page

KA3842B/KA3843B/KA3844B/KA3845B

6

Figure 5. Oscillator Waveforms and Maximum Duty Cycle

Oscillator timing capacitor, CT, is charged by VREF through RT and discharged by an internal current source. During the dis-

charge time, the internal clock signal blanks the output to the low state. Selection of RT and CT therefore determines both

oscillator frequency and maximum duty cycle. Charge and discharge times are determined by the formulas:

tc = 0.55 RT CT

Frequency, then, is: f=(tc + td)

-1

Figure 8. Shutdown Techniques

Figure 6. Oscillator Dead Time & Frequency

Figure 7. Timing Resistance vs Frequency

t

D

R

TCTIn

0.0063R

T

2.7

–

0.0063R

T

4

–

----------------------------------------





=

ForRT

5K

Ω f

1.8

R

TCT

---------------

=

,

>

(Deadtime vs CT RT > 5kΩ)

Podobny numer części - KA3843B

Producent	Numer części	Arkusz danych	Szczegółowy opis
Fairchild Semiconductor	KA3843B	91Kb / 12P	SMPS Controller
ON Semiconductor	KA3843B	243Kb / 12P	SMPS Controller Rev. 1.0.2
Fairchild Semiconductor	KA3843BD	91Kb / 12P	SMPS Controller
ON Semiconductor	KA3843BD	243Kb / 12P	SMPS Controller Rev. 1.0.2

More results

Podobny opis - KA3843B

Producent	Numer części	Arkusz danych	Szczegółowy opis
Fairchild Semiconductor	KA7511	56Kb / 8P	SMPS Controller
	KA3843AC	47Kb / 6P	SMPS Controller
	UC3842A	42Kb / 8P	SMPS Controller
ARTSCHIP ELECTRONICS CO...	MC34063A	334Kb / 10P	SMPS Controller
Fairchild Semiconductor	UC3842	127Kb / 12P	SMPS Controller
	UC3846	67Kb / 10P	SMPS Controller
	KA3525A	78Kb / 5P	SMPS CONTROLLER
	KA7515	36Kb / 6P	SMPS Controller
ON Semiconductor	KA3525A	207Kb / 8P	SMPS Controller Rev. 1.0.1
ON Semiconductor	KA3843B	243Kb / 12P	SMPS Controller Rev. 1.0.2

More results

KA3843B Arkusz danych(PDF) 6 Page - Fairchild Semiconductor

KA3843B Arkusz danych(HTML) 6 Page - Fairchild Semiconductor

Podobny numer części - KA3843B

Podobny opis - KA3843B

Html Pages

1 2 3 4 5 6 7 8 9 10

Arkusz danych Pobierz

Link URL