Philips Semiconductors
Objective specification
Single BTL power driver
APPLICATION INFORMATION
TDA7072A/AT
(1)
handbook, full pagewidth
VP = 5 V
100 nF
220
µF
1
SERVO SYSTEM
TDA7072A
TDA7072AT
I + i
5
driver signal
Rs
Vref
500
Ω
2
(2)
RL
3
I – i
8
4
n.c.
6
7
n.c.
MCD379
ground
(1) This capacitor can be omitted if the 220
µF
electrolytic capacitor is connected close to pin 1.
(1) R
L
can be: focus, tracking, sled function or spindle motor.
Fig.3 Test and application diagram.
+ (VP – 2.1) V
0V
MCD380
– (VP – 2.1) V
Fig.4 Typical output voltage swing over R
L
.
July 1994
6