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TDA4867 データシートの表示(PDF) - Philips Electronics

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TDA4867 Datasheet PDF : 14 Pages
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Philips Semiconductors
Full bridge current driven vertical
deflection booster
Preliminary specification
TDA4867J
Protection
The output stages are protected against:
Thermal overshoot in normal operation
Short-circuit of the coil (pins OUTB and OUTA).
Guard circuit
The internal guard circuit provides a blanking signal for the
CRT. The guard signal is active HIGH:
At thermal overshoot
During flyback
When missing flyback supply voltage
When power supply voltage too low, VP < VP(min).
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.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 60134); voltages referenced to ground (pin GND);
unless otherwise specified.
SYMBOL
PARAMETER
VP
supply voltage
VFB
flyback supply voltage
IFB
flyback supply current
VINP, VINN input voltage
IINP, IINN
input current
VOUTB
output voltage on pin OUTB
VOUTA
output voltage on pin OUTA
IOUTB, IOUTA output current
VFEEDB
feedback voltage
IFEEDB
feedback current
VGUARD
guard voltage
IGUARD
guard current
Tstg
storage temperature
Tamb
ambient temperature
Tj
junction temperature
Vesd
electrostatic discharge voltage
CONDITIONS MIN.
0
0
0
0
0
0
0
note 1
0
0
0
0
0
20
20
note 2
20
note 3
note 4
4 000
250
MAX.
30
60
±1.8
5
±5
VP
VFB
±1.6
VP
±5
10
±5
+150
+75
+150
+4 000
+250
UNIT
V
V
A
V
mA
V
V
A
V
mA
V
mA
°C
°C
°C
V
V
Notes
1. Maximum output currents IOUTB and IOUTA are limited by current protection.
2. Internally limited by thermal protection; will be activated for Tj 150 °C.
3. Human body model: equivalent to discharging a 100 pF capacitor through a 1.5 kresistor.
4. Machine model: equivalent to discharging a 200 pF capacitor through a 0.75 µH inductance.
2003 Feb 05
5

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