TDA4680 Datasheet, PDF (15/28 Pages) NXP Semiconductors – Video processor with automatic cut-off and white level control

Philips Semiconductors
Video processor with automatic cut-off
and white level control
Product specification
TDA4680
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
GENERAL
I₁₄
t_d
t_BK
n_pulse
input current
leading edge delay of the clamping
pulse
V₁₄ < 0.5 V
control bit DELOF = 0
control bit DELOF = 1
required burst key pulse time
control bit DELOF = 0;
normally used with f_L
control bit DELOF = 1;
normally used with 2f_L
required horizontal or burst key pulses e.g. at interlace scan
during vertical blanking interval
(VBW2 = 0)
e.g. at progressive line
scan (VBW2 = 1)
−100 −
−
1.5
−
0
3
−
1.5 −
4
−
8
−
−
µA
−
µs
−
µs
−
µs
−
µs
29
−
57
−
Average beam current limiting (pin 15); note 7
V_c(15)
∆V_c(15)
contrast reduction starting voltage
voltage difference for full contrast
reduction
V_br(15)
∆V_br(15)
brightness reduction starting voltage
voltage difference for full brightness
reduction
−
4.0
−
V
−
−2.0
−
V
−
2.5
−
V
−
−1.6
−
V
Peak drive limiting voltage [pin 16; internal peak drive limiting level (V_pdl) acts on RGB outputs under I²C-bus
control; sub-address 0AH]; note 8
V_20/22/24
RGB output voltages
at 00H
at 3FH
−
−
6.5 −
3.0
V
−
V
I₁₆
charge current
discharge current
−
−1
−
µA
during peak white
−
5
−
mA
V₁₆
V_c(16)
∆V_c(16)
internal voltage limitation
contrast reduction starting voltage
voltage difference for full contrast
reduction
4.5 −
−
V
−
4.0
−
V
−
−2.0
−
V
V_br(16)
∆V_br(16)
brightness reduction starting voltage
voltage difference for full brightness
reduction
−
2.5
−
V
−
−1.6
−
V
1996 Oct 25
15