MP4680 datasheet(15/28 Pages) PHILIPS

15 / 28 page

1996 Oct 25

Philips Semiconductors

Product speciﬁcation

Video processor with automatic cut-off

and white level control

TDA4680

GENERAL

I14

input current

V14 < 0.5 V

−100 −−

µA

leading edge delay of the clamping

pulse

control bit DELOF = 0

−

1.5

−µs

control bit DELOF = 1

−

−µs

tBK

required burst key pulse time

control bit DELOF = 0;

normally used with fL

−−

µs

control bit DELOF = 1;

normally used with 2fL

1.5

−−

µs

npulse

required horizontal or burst key pulses

during vertical blanking interval

e.g. at interlace scan

(VBW2 = 0)

−

e.g. at progressive line

scan (VBW2 = 1)

−

Average beam current limiting (pin 15); note 7

Vc(15)

contrast reduction starting voltage

−

4.0

−

∆Vc(15)

voltage difference for full contrast

reduction

−−2.0

−

Vbr(15)

brightness reduction starting voltage

−

2.5

−

∆Vbr(15)

voltage difference for full brightness

reduction

−−1.6

−

Peak drive limiting voltage [pin 16; internal peak drive limiting level (Vpdl) acts on RGB outputs under I2C-bus

control; sub-address 0AH]; note 8

V20/22/24

RGB output voltages

at 00H

−−

3.0

at 3FH

6.5

−−

I16

charge current

−−1

−µA

discharge current

during peak white

−

V16

internal voltage limitation

4.5

−−

Vc(16)

contrast reduction starting voltage

−

4.0

−

∆Vc(16)

voltage difference for full contrast

reduction

−−2.0

−

Vbr(16)

brightness reduction starting voltage

−

2.5

−

∆Vbr(16)

voltage difference for full brightness

reduction

−−1.6

−

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

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