an7199z Panasonic Corporation of North America, an7199z Datasheet - Page 13

• Manufacturer Part Number: an7199z
• Description: Dual 20 W Btl Power Ic For Car Audio
• Manufacturer: Panasonic Corporation of North America

ICs for Audio Common Use
[2] Application note (continued)
4. Ripple filter (continued)
5. GND terminal
6. Cooling fin
7. Shock noise
Technical Information (continued)
6) After the power supply is
1) Be sure to short-circuit each GND terminal of
2) For each GND terminal, the one-point earth,
3) Each GND terminal is not electrically short-circuited inside. Only pin 8 is connected with substrate.
4) Pin 9 is input signal GND. Connect only pin 9 with Pre-GND.
1) The cooling fin is not connected with GND terminal by using Au wire. Only pin 8 is electrically connected
2) Always attach an outside heat sink to the cooling fin. The cooling fin must be fastened onto a chassis for use.
3) Do not give the cooling fin any potential other than the GND potential. Otherwise, it may cause breakdown.
4) Connection of the cooling fin with GND can reduce the incoming noise hum. (It is unnecessary to connect
1) STB on/off
2) Mute on/off
turned off (STB-low), it takes
less than 10 seconds for the
total circuit current to become
the standby current (under 10
tor is inserted between the
ripple filter terminal and GND
for the purpose of reducing
the inspection time with set, a
time until the current becomes
the standby current can be
shortened.
pin 3, 8, 9 and 14 at the outside of the IC in use.
referenced to the GND connection point of
electrolytic capacitor between the supply ter-
minal and GND, is most effective for reduc-
ing the distortion. Even in the worst case,
ground pin 8, 9 of input GND separately from
all the other GND terminals.
through substrate.
Otherwise, IC lead failure may occur.
with GND in use, but connect with the power GND when the cooling fin is connected with GND)
shock noise. In such a case, insert a capacitor of approx. 0.01 F between the standby terminal and GND.
A). If approx. 47 ohms resis-
No shock noise is released. However, the changeover switch of the standby terminal may make a slight
No shock noise is released. Refer to the section on the mute function.
33 F
12
350 A
15 k
AN7198Z, AN7199Z
1
10 k
10 k
3
Figure 5
Figure 6
8
V
1.7 mA
Constant
current source
REF
4 k
V
CC
9
To GND of input
AN7199Z
14
Protection
circuit
13