TDA4864AJ/V1,112 NXP Semiconductors, TDA4864AJ/V1,112 Datasheet - Page 5

• Manufacturer Part Number: TDA4864AJ/V1,112
• Manufacturer: NXP Semiconductors

Specifications of TDA4864AJ/V1,112

• Operating Supply Voltage (typ): 12/15/18/24/28V
• Operating Supply Voltage (min): 9V
• Operating Supply Voltage (max): 30V
• Operating Temp Range: -20C to 75C
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Pin Count: 7
• Lead Free Status / RoHS Status: Compliant

Philips Semiconductors
7. Functional description
9397 750 13441
Product data sheet
7.1 Differential input stage
7.2 Vertical output and thermal protection
7.3 Flyback generator
Both the TDA4864J and TDA4864AJ consist of a differential input stage, a vertical output
stage, a flyback generator, a reference circuit and a thermal protection circuit.
The TDA4864J operates with a separate flyback supply voltage (see
TDA4864AJ generates the flyback voltage internally by doubling the supply voltage
(see
The differential sawtooth input current signal (from the deflection controller) is connected
to the inputs (inverted signal to pin INN and non-inverted signal to pin INP). The vertical
feedback signal is superimposed on the inverted signal on pin INN.
The vertical output stage is a quasi-complementary class-B amplifier with a high linearity.
The output stage is protected against thermal overshoots. For a junction temperature of
T
The flyback generator supplies the vertical output stage during flyback.
The TDA4864J is used with a separate flyback supply voltage to achieve a short flyback
time with minimized power dissipation.
The TDA4864AJ needs a capacitor (C
Figure
R5. During flyback the cathode of capacitor C
and the flyback voltage is then twice the supply voltage. For the TDA4864AJ the
resistor R6 in the positive supply line can be used to reduce the power consumption.
In parallel with the deflection coil a damping resistor R
(R
RC combination (R
noise effect and the flyback time (see
j
> 150 C the protection will be activated and will reduce the deflection current (I
S1
Figure
= 5.6
2). Capacitor C
2).
and C
S2
S1
= 5.6
= 100 nF) are needed. Furthermore, another additional
F
Rev. 01 — 12 August 2004
is charged during scan, using the external diode D1 and resistor
and C
S2
Figure 7
F
= 47 nF to 150 nF) can be used to minimize the
) connected between pins V
TDA4864J; TDA4864AJ
F
is connected to the positive supply voltage
and 8).
P
and an RC combination
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Vertical deflection booster
P3
Figure
and V
P2
1) while the
(see
VOUT
5 of 18
).