TDA7072AT Просмотр технического описания (PDF) - Philips Electronics
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TDA7072AT Datasheet PDF : 10 Pages
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Philips Semiconductors
Single BTL power driver
Objective specification
TDA7072A/AT
FUNCTIONAL DESCRIPTION
The TDA7072A/AT are single power driver circuits in a
BTL configuration, intended for use as a power driver for
servo systems with a single supply. They are particular
designed for compact disc players and are capable of
driving focus, tracking, sled functions and spindle motors.
Because of the BTL configuration, the devices can supply
a bi-directional DC current in the load, with only a single
supply voltage. The voltage gain is fixed by internal
feedback at 33.5 dB and the devices operate in a wide
supply voltage range (3 to 18 V). The devices can supply
a maximum output current of 0.6 A. The outputs can be
short-circuited over the load, to the supply and to ground
at all input conditions. The differential inputs can handle
common mode input voltages from ground level up to
(VP −2.2 V). The devices have a very high slew rate. Due
to the large bandwidth, they can handle PWM signals up
to 176 kHz.
LIMITING VALUES
In accordance with the Absolute Maximum System (IEC 134.
SYMBOL
PARAMETER
CONDITIONS
VP
IORM
IOSM
Ptot
Tstg
Tvj
Tsc
positive supply voltage range
repetitive peak output current
non repetitive peak output current
total power dissipation
TDA7072A
TDA7072AT
storage temperature range
virtual junction temperature
short-circuit time
Tamb < 25 °C
see note
MIN.
−
−
−
MAX.
18
1
1.5
UNIT
V
A
A
−
1.25 W
−
0.54 W
−55
+150 °C
−
+150 °C
−
1
hr
Note to the limiting values
The outputs can be short-circuited over the load, to the supply and to ground at all input conditions.
THERMAL RESISTANCE
SYMBOL
Rth j-a
PARAMETER
from junction to ambient in free air
TDA7072A
TDA7072AT
THERMAL RESISTANCE
100 K/W
155 K/W
Note to the thermal resistance
TDA7072A: VP = 5 V; RL = 8 Ω; The typical voltage swing = 5.8 V and Vloss is 2.1 V therefore IO = 0.36 A and
Ptot = 0.76 W; Tamb (max) = 150 − 0.76 × 100 = 74 °C
TDA7072AT: VP = 5 V; RL = 16 typical voltage swing = 5.8 V and Vloss is 2.1 V therefore IO = 0.18 A and Ptot = 0.38 W;
Tamb (max) = 150 − 0.38 × 155 = 91 °C
July 1994
4
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