TDA4867J Philips Semiconductors, TDA4867J Datasheet - Page 5

• Manufacturer Part Number: TDA4867J
• Description: Full bridge current driven vertical deflection booster
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Protection
The output stages are protected against:
Guard circuit
The internal guard circuit provides a blanking signal for the
CRT. The guard signal is active HIGH:
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 60134); voltages referenced to ground (pin GND);
unless otherwise specified.
Notes
1. Maximum output currents I
2. Internally limited by thermal protection; will be activated for T
3. Human body model: equivalent to discharging a 100 pF capacitor through a 1.5 k resistor.
4. Machine model: equivalent to discharging a 200 pF capacitor through a 0.75 H inductance.
2003 Feb 05
V
V
I
V
I
V
V
I
V
I
V
I
T
T
T
V
FB
INP
OUTB
FEEDB
GUARD
SYMBOL
Thermal overshoot in normal operation
Short-circuit of the coil (pins OUTB and OUTA).
At thermal overshoot
During flyback
When missing flyback supply voltage
When power supply voltage too low, V
stg
amb
j
P
FB
INP
OUTB
OUTA
FEEDB
GUARD
esd
Full bridge current driven vertical
deflection booster
, I
, V
INN
, I
INN
OUTA
supply voltage
flyback supply voltage
flyback supply current
input voltage
input current
output voltage on pin OUTB
output voltage on pin OUTA
output current
feedback voltage
feedback current
guard voltage
guard current
storage temperature
ambient temperature
junction temperature
electrostatic discharge voltage
OUTB
PARAMETER
and I
P
OUTA
< V
P(min)
are limited by current protection.
.
5
The internal guard circuit will not be activated, if the input
signals on pins INP and INN delivered from the driver
circuit are out of range or at short-circuit of the coil
(pins OUTB and OUTA).
For this reason an external guard circuit can be applied to
detect failures of the deflection (see Fig.5). This circuit will
be activated when flyback pulses are missing, which is the
indication of any abnormal operation.
The guard output pin can be used as input for the power
save mode. A current or a voltage has to be applied to the
pin. In this case the output stages are switched off
completely.
j
150 C.
note 1
note 2
note 3
note 4
CONDITIONS
0
0
0
0
0
0
0
0
0
0
0
0
20
20
20
4000
250
MIN.
Preliminary specification
30
60
5
V
V
V
10
+150
+75
+150
+4000
+250
1.8
5
1.6
5
5
P
FB
P
MAX.
TDA4867J
V
V
A
V
mA
V
V
A
V
mA
V
mA
V
V
C
C
C
UNIT