EL4390 데이터 시트보기 (PDF) - Elantec -> Intersil

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EL4390

Triple 80 MHz Video Amplifier with DC Restore

Elantec -> Intersil 

EL4390C

Triple 80 MHz Video Amplifier with DC Restore

Table 1 Charge Storage Capacitor Value vs Droop and Charging Rates

Cap Value

(nF)

Droop in

60mS (mV)

Charge in

2mS (mV)

Charge in

4mS (mV)

10

30

400

800

22

13 6

182

364

47

64

85

170

100

30

40

80

220

1 36

18

36

These numbers represent the worst case bias current and the worst case charging current Note that to

get the full (2mAa) charging current the clamp input must have l250mV of error voltage

Note that the magnitude of the bias current will decrease as temperature increases

The basic droop formula is

V (droop) e IBa c (Line time b Charge time) capacitor value

and the basic charging formula is

V (charge) e IOUT c Charge time capacitor value

Where IOUT is

IOUT e (Clamp voltage b INa voltage) 120

4

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