TDA4855 Datasheet, PDF (17/44 Pages) NXP Semiconductors – Autosync Deflection Controller ASDC

Philips Semiconductors
Autosync Deflection Controller (ASDC)
Preliminary specification
TDA4855
SYMBOL
PARAMETER
CONDITIONS
MIN.
Differential vertical current outputs
ADJUSTMENT OF VERTICAL SIZE (see Figs 3 to 8) [VAMP (PIN 18)]
∆VAMP
vertical size adjustment range I_VAMP = 0; note 11
(referenced to nominal vertical _{IVAMP = −135 µA; note 11}
size)
I_VAMP
input current for maximum
amplitude (100%)
input current for minimum
amplitude (60%)
V_ref(VAMP)
reference voltage at input
PRESETS FOR VGA MODE DEPENDENT VERTICAL SIZE
I_HBUF/I_HREF
∆VAMP
minimum current ratio
I_HBUF/I_HREF for enable of VGA
presets
variation of vertical size for
detected VGA modes
(reference for all amplitude
settings is VGA480 mode)
note 12
VGA350
VGA400
VGA480
ADJUSTMENT OF VERTICAL SHIFT (see Figs 3 to 8) [VPOS (PIN 17)]
∆VPOS
vertical shift adjustment range
(referenced to 100% vertical
size)
I_VPOS = −135 µA; note 11
I_VPOS = 0; note 11
I_VPOS
input current for maximum
shift-up
input current for maximum
shift-down
V_ref(VPOS)
V_off(VPOS)
reference voltage at input
vertical shift is centred if VPOS
(pin 17) is forced to ground
ADJUSTMENT OF VERTICAL S-CORRECTION (see Figs 3 to 8) [VSCOR (PIN 19)]
∆VSCOR
vertical S-correction
adjustment range
I_VSCOR = 0; note 11
I_VSCOR = −135 µA;
note 11
I_VSCOR
input current for maximum
S-correction
δVSCOR
V_ref(VSCOR)
V_SAWM(p-p)
input current for minimum
S-correction
symmetry error of S-correction
reference voltage at input
voltage amplitude of
superimposed logarithmic
sawtooth (peak-to-peak value)
maximum ∆VSCOR
note 13
−
−
−110
−
−
2.25
−
−
−
−
−
−110
−
−
0
−
−
−110
−
−
−
−
TYP.
60
100
−120
0
5.0
2.5
116.8
102.2
100.0
−11.5
+11.5
−120
0
5.0
−
2
46
−120
0
−
5.0
−
MAX.
−
−
−135
−
−
2.75
−
−
−
−
−
−135
−
−
0.1
−
−
−135
−
±0.7
−
145
UNIT
%
%
µA
µA
V
%
%
%
%
%
µA
µA
V
V
%
%
µA
µA
%
V
mV
1996 Jul 18
17