TDA4857PS Datasheet, PDF (15/56 Pages) NXP Semiconductors – I2C-bus autosync deflection controller for PC monitors

Philips Semiconductors
I²C-bus autosync deflection controller for
PC monitors
Product specification
TDA4857PS
SYMBOL
PARAMETER
CONDITIONS
Automatic polarity correction for vertical sync
t_{W(VSYNC)(max)}
maximum width of vertical sync
pulse
t_d(VPOL)
delay time for changing polarity
Video clamping/vertical blanking output: pin CLBL
t_clamp(CLBL)
V_clamp(CLBL)
width of video clamping pulse
top voltage level of video
clamping pulse
measured at V_CLBL = 3 V
TC_clamp
STPS_clamp
temperature coefficient of
V_clamp(CLBL)
steepness of slopes for
clamping pulse
R_L = 1 MΩ; C_L = 20 pF
t_{d(HSYNCt-CLBL)}
t_clamp1(max)
delay between trailing edge of
horizontal sync and start of
video clamping pulse
maximum duration of video
clamping pulse referenced to
end of horizontal sync
clamping pulse triggered
on trailing edge of
horizontal sync;
control bit CLAMP = 0;
measured at V_CLBL = 3 V
t_{d(HSYNCl-CLBL)}
t_clamp2(max)
delay between leading edge of
horizontal sync and start of
video clamping pulse
maximum duration of video
clamping pulse referenced to
end of horizontal sync
clamping pulse triggered
on leading edge of
horizontal sync;
control bit CLAMP = 1;
measured at V_CLBL = 3 V
V_blank(CLBL)
top voltage level of vertical
blanking pulse
notes 1 and 2
t_blank(CLBL)
width of vertical blanking pulse control bit VBLK = 0
at pins CLBL and HUNLOCK _{control bit VBLK = 1}
TC_blank
V_scan(CLBL)
temperature coefficient of
V_blank(CLBL)
output voltage during vertical
scan
I_CLBL = 0
TC_scan
I_sink(CLBL)
I_L(CLBL)
temperature coefficient of
V_scan(CLBL)
internal sink current
external load current
Horizontal oscillator: pins HCAP and HREF
f_fr(H)
∆f_fr(H)
free-running frequency without
PLL1 action (for testing only)
spread of free-running
frequency (excluding spread of
external components)
R_HBUF = ∞;
R_HREF = 2.4 kΩ;
C_HCAP = 10 nF; note 3
MIN.
−
0.45
0.6
4.32
−
−
−
−
−
−
1.7
220
305
−
0.59
−
2.4
−
30.53
−
TYP.
−
−
0.7
4.75
4
50
130
−
300
−
1.9
260
350
2
0.63
−2
−
−
31.45
−
MAX. UNIT
400
µs
1.8
ms
0.8
µs
5.23 V
−
mV/K
−
ns/V
−
ns
1.0
µs
−
ns
0.15 µs
2.1
V
300
µs
395
µs
−
mV/K
0.67 V
−
mV/K
−
mA
−3.0 mA
32.39 kHz
±3.0 %
2000 Jan 31
15