TDA4688 Datasheet, PDF (14/24 Pages) NXP Semiconductors – Video processor with automatic cut-off control

Philips Semiconductors
Video processor with automatic cut-off control
Product specification
TDA4688
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
Vertical flyback (pin 18); note 6
V₁₈
vertical flyback pulse
internal voltage
I₁₈
input current
Average beam current limiting (pin 15); note 8
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
for LOW
for HIGH
pin 18 open-circuit;
note 7
−
−
4.5 −
−
5.0
−
−
2.5
V
−
V
−
V
5
µA
−
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; subaddress 0AH]; note 9
V_20,22,24
I₁₆
minimum RGB output voltages
maximum RGB output voltages
charge current
discharge current
at 00H
at 3FH
during peak white
−
−
7.0 −
−
−1
−
5
3.0
V
−
V
−
µA
−
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
Automatic cut-off control (pin 19); notes 6 and 10 to 12; see Fig.7
V₁₉
external voltage
I₁₉
output current
input current
additional input current
switch-on delay 1
V_24,22,20
monitor pulse amplitude (under
I²C-bus control; subaddress 0AH)
switch-on delay 1;
note 11
V_19(th)
voltage threshold for picture tube
cathode warming up
switch-on delay 1
V_ref
internally controlled voltage
during leakage
measurement period
∆V₁₉
difference between V_MEAS (cut-off
measurement voltage) and V_ref
−
−
V_P − 1.4 V
−
−
−60
µA
150 −
−
µA
−
0.5
−
mA
−
V_pdl − 1.0 −
V
−
4.5
−
V
−
2.7
−
V
−
1.0
−
V
1997 Jun 23
14