TDA4855 Datasheet, PDF (20/44 Pages) NXP Semiconductors – Autosync Deflection Controller ASDC

Philips Semiconductors
Autosync Deflection Controller (ASDC)
Preliminary specification
TDA4855
SYMBOL
PARAMETER
CONDITIONS
B+ control section (see Figs 12 and 13)
TRANSCONDUCTANCE AMPLIFIER [BIN (PIN 5) AND BOP (PIN 3)]
V_BIN
I_BIN(max)
V_ref(int)
V_BOP(min)
V_BOP(max)
I_BOP(max)
g
G_open
C_BOP
input voltage
maximum input current
reference voltage at internal
non-inverting input of OTA
minimum output voltage
maximum output voltage
maximum output current
transconductance of OTA
open-loop gain
minimum value of capacitor at
BOP (pin 3)
I_BOP < 1 mA
note 17
note 18
VOLTAGE COMPARATOR [BSENS (PIN 4)]
V_BSENS
voltage range of positive
comparator input
V_BOP
voltage range of negative
comparator input
I_BSENS
maximum leakage current
OPEN COLLECTOR OUTPUT STAGE [BDRV (PIN 6)]
discharge disabled
I_BDRV(max)
I_{leakage(BDRV)}
V_sat(BDRV)
t_off(min)
t_d(BDRV)
maximum output current
output leakage current
saturation voltage
minimum off-time
delay between BDRV pulse
and HDRV pulse
BSENS DISCHARGE CIRCUIT
V_BDRV = 16 V
I_BDRV < 20 mA
measured at
V_HDRV, V_BDRV = 3 V
V_STOP(BSENS)
discharge stop level
I_DISC(BSENS)
V_{RESTART(BSENS)}
C_BSENS
discharge current
threshold voltage for restart
minimum value of capacitor at
BSENS (pin 4)
capacitive load;
I_BSENS = 0.5 mA
V_BSENS > 2.5 V
fault condition
Internal reference, supply voltage and protection
V_STAB(VCC)
external supply voltage for
complete stabilization of all
internal references
I_VCC
PSRR
supply current
power supply rejection ratio of
internal supply voltage
f = 1 kHz
MIN. TYP. MAX. UNIT
0
−
−
−
2.37 2.5
5.25 V
±1
µA
2.58 V
−
0.4
−
V
5
5.3
5.6
V
−
±500 −
µA
30
50
70
mS
−
86
−
dB
4.7
−
−
nF
0
−
5
V
0
−
5
V
−
−
−2
µA
20
−
−
mA
−
−
3
µA
−
−
300
mV
−
250
−
ns
−
500
−
ns
0.85 1.0
4.5
6
1.2
1.3
2
−
1.15 V
7.5
mA
1.4
V
−
nF
9.2
−
16
V
−
49
−
mA
50
−
−
dB
1996 Jul 18
20