V

DD

V

CC

2

3

6

7

C

F

R

F

R3

R2

R1

1

IN

4

5

C

LOAD

V

IN

V

OUT

V

OUT

t

D

P

C3

C4

R

P

Figure 2 : Typical Evaluation Schematic

TYPICAL APPLICATION

The TDA9511 consists of :

- A differential amplifier with active load,

- A DMOS output buffer,

- Abandgapvoltage reference(Pin 3 for filtering only).

PC board lay-out

The best performances are obtained with a care-

fully designed HF PC-Board, especially for the

output and input capacitors.

by a capacitor R3 (roughly 20

parallel with the input resistor R1.

The full bandwidth of the device is only obtained

with well matched compensation otherwise the

application will have either an integrator response

with a low bandwidth or a differentiator response

with too much ringing.

flashover protection.

Power dissipation

The power dissipation consists of a static part and

a dynamic part. The static dissipation varies with

the output voltage and the feedback resistor. The

dynamic power dissipation increases with the pixel

frequency.

signal, the typical power dissipation is about 3.0W,

In first approximation, the dynamic dissipation is :

and the total dissipation is :

_____

)

_____

with f = pixel frequency

P = 110V x 10pF x 40V x 40MHz + 110V x 7mA

+12 x 20mA - 60

Ω = 2.95W

Recommended values :

R1 = 1k

R3 # 150

Ω.

TDA9511

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