TDA1302T Philips Semiconductors, TDA1302T Datasheet - Page 16

• Manufacturer Part Number: TDA1302T
• Description: Data amplifier and laser supply circuit for CD player and read only optical systems
• Manufacturer: Philips Semiconductors

TDA1302_1 17 Wed Sep 14 13:30:56 1994
Philips Semiconductors
Circuit recommendations
P
It is advised to keep the output wires of the diode current
amplifiers separated from the input as much as possible to
prevent oscillations.
E
TDA1302T protects the laser diode against damage due to
supply voltage transients. When any external circuitry is
used in the ‘laser diode-monitor diode’ chain, the safety of
the laser diode completely relies on the quality of this
external circuitry. Therefore, it should be noted that:
1. If such a circuit requires a supply voltage, make sure
2. It is advised not to implement integrating actions in this
M
It is advised not to connect any current meter directly in
series with the laser diode. A safe method is the inclusion
of a 1
and measuring the voltage across this resistor.
September 1994
RINTED
XTERNAL MONITOR DIODE CIRCUITRY
EASUREMENT OF THE LASER DIODE CURRENT
Data amplifier and laser supply circuit for
CD player and read only optical systems
that this voltage is present at least at the same
moment as V
external circuitry as this may conflict with the internal
integrator, especially during possible supply voltage
drops.
-
resistor, connected in series with the laser diode,
CIRCUIT BOARD LAY
DDL
or earlier.
-
OUT ITEMS
17
Preliminary specification
TDA1302T