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Four-Channel Driver IC for CD Players/Decks
Four-Channel Driver IC for CD Players/Decks
LA6548ND
LA6548ND
Overview
The LA6548ND is a 4-channel driver for CD players/decks that features BTL amplifier circuits in all four channels.
Functions and Features
Four power amplifier (BTL connection) circuits
Iomax: 0.7 A
Built-in level shifter circuits
Built-in muting circuit mutes all outputs (This circuit operates for the BTL
amplifier channels but does not affect the regulator circuit.)
Built-in regulator (3.3 V output, requires an external pnp transistor)
Thermal shutdown circuit
Package: DIP30SDLF (400 mil)
Block Diagram
1
V CC 1
2
Muting (output on/off)
MUTE
15.4k
11k
3
-
VIN1
+
VG1
4
5
VO1+
6
VO1-
7
GND
8
GND
9
GND
10
VO2-
11
VO2+
12
VG2
15.4k
11k
13
VIN2
-
+
14
REG-C
Collector connection for the
external pnp transistor
15
REG-B
Base connection for the
external pnp transistor
29 Car Audio
30
V CC 2
-
+
29
VREF
15.4k
11k
28
VIN4
-
+
27
VG4
26
VO4+
25
VO4-
24
GND
23
GND
-
+
22
GND
21
VO3-
20
VO3+
19
VIN3G
15.4k
11k
18
-
VIN3
+
17
CD
3.3V REG
RESET
16
RESET
Four-Channel Driver IC for CD Players/Decks
Four-Channel Driver IC for CD Players/Decks
LA6548NH
LA6548NH
Overview
The LA6548NH is a 4-channel driver for CD players/decks that features BTL amplifier circuits in all four channels.
Functions and Features
Four power amplifier (BTL connection) circuits
Iomax: 0.7 A
Built-in level shifter circuits
Built-in muting circuit mutes all outputs (This circuit operates for the BTL
amplifier channels but does not affect the regulator circuit.)
Built-in regulator (3.3 V output, requires an external pnp transistor)
Thermal shutdown circuit
Package: HSOP28H (375 mil)
Block Diagram
1
V CC 1
2
Muting (output on/off)
MUTE
15.4k
11k
VIN1
3
-
+
4
VG1
5
VO1+
6
VO1-
7
( NC )
GND
-
FR
+
( NC )
8
9
VO2-
10
VO2+
11
VG2
15.4k
11k
12
-
VIN2
+
13
REG-C
Collector connection for the
external pnp transistor
3.3V REG
14
REG-B
Base connection for the
external pnp transistor
28
V CC 2
-
+
27
VREF
15.4k
11k
-
26
VIN4
+
25
VG4
24
VO4+
23
VO4-
22
( NC )
GND
FR
21
( NC )
20
VO3-
19
VO3+
18
VG3
15.4k
11k
-
17
VIN3
+
16
CD
RESET
15
RESET
30 Car Audio
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