SANYO LA6541

Ordering number: EN 5897
Monolithic Linear IC
LA6541
4-channel Bridge Driver
for Compact Discs
Overview
Package Dimensions
The LA6541 is a 4-channel bridge (BTL) driver with a 5 V
power supply (uses an external PNP transistor) developed for
compact discs.
unit : mm
3227-HSOP24
[LA6541]
15.3
4.3
0.3
24
. 4-channel bridge (BTL) power amplifier.
. I max. = 700 mA.
. With mute circuit
13
0.65
Functions and Features
1
0.3
0.8
12
0.85
2.5max
1.3
7.9
(Affects all amplifier outputs, Amp 1 to Amp 8).
(When the mute voltage is low, the outputs turn off;
when the mute voltage is high, the outputs turn on).
5.0 V regulator built in (Uses external PNP transistor).
Reset circuit built in (The reset output delay time can be
adjusted through an external capacitor).
0.25
0.1
2.25
.
.
10.5
O
SANYO : HSOP24
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Symbol
Conditions
Ratings
Unit
VCC max
14
V
Maximum input voltage
VINB
13
V
Mute pin voltage
VMute
13
V
2.3
W
Allowable power dissipation
Pd max
When using standard board
114.3 × 76.1 × 1.5 mm
(material: glass epoxy)
Operating temperature
Topr
–20 to +75
°C
Storage temperature
Tstg
–55 to +150
°C
Ratings
Unit
Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
Recommended operating voltage
VCC
5.6 to 13
V
Reset output source current
IORH
0 to 200
µA
Reset output sink current
IORL
0 to 2
mA
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
73098HA (II) No.5897- 1/6
LA6541
Electrical Characteristics at Ta = 25°C, VCC = 8.0 V, VREF = 2.5 V
Parameter
Symbol
ICC1
ICC2
No-load current drain
VOF1
Output offset voltage
VOF2
Conditions
When all amplifier outputs are on (Mute high)
When all amplifier outputs are off (Mute low)
Amplifier 1 to 2 (VO1 to VO2),
Amplifier 3 to 4 (VO3 to VO4)
Amplifier 5 to 6 (VO5 to VO6),
Amplifier 7 to 8 (VO7 to VO8)
min
Buffer amplifier input voltage
VBIN
range
Input voltage range
VIN
Output source voltage
VO1
Note 1, when RL = 8.0 Ω
Output sink voltage
VO2
Note 2, when RL = 8.0 Ω
Closed-circuit voltage gain
VG
Between bridge amplifiers
Slew rate
SR
Mute on voltage
VMute
Note 3
[Power Supply] (with 2SB632K connected externally)
Output voltage
VOUT1
IO = 200 mA
Line regulation
∆VOLN1
5.6 V % VIN1 % 12 V
Load regulation
∆VOLD1
5 mA % IO % 200 mA
[Reset]
High reset output voltage
VORH
IORH = 200 µA, Cd pin open
Low reset output voltage
VORL
ISRL = 2 mA, Cd is shorted to GND
Reset threshold voltage
VRT
Note 4
Reset hysteresis voltage
Vhys
Note 5
Reset output delay time
td
Cd = 0.1 µF
typ
20
15
max
40
35
Unit
mA
mA
–50
+50
mV
–50
+50
mV
1.5
VCC−1.5
V
VCC−1.5
V
V
V
dB
V/µs
V
1.0
5.0
5.6
1.8
9
0.15
1.2
2.4
4.75
5.0
20
50
5.25
100
150
V
mV
mV
4.73
4.98
100
4.3
100
10
5.23
200
V
mV
V
mV
ms
40
200
Notes:
1. Source voltage to ground when an 8 Ω load is connected between bridge amplifier outputs.
2. Sink voltage to ground when an 8 Ω load is connected between bridge amplifier outputs.
3. When the mute signal is high, all amplifier outputs turn on, and when low, all amplifier outputs turn off. When the mute
signal is low, amplifier output is undefined.
4. 5 V supply voltage when the reset output goes low.
5. Potential difference from the 5 V supply voltage when the reset output goes low and when it goes high.
Allowable power dissipation, Pd max – W
Pd max – Ta
With PCB
2.3
1.38
Ambient temperature, Ta – °C
Truth Table
CH1
Input
H
L
MUTE
V O1
(Amp1)
CH2
VO2
(Amp2)
V O3
(Amp3)
CH3
V O4
(Amp4)
VO5
(Amp5)
CH4
V O6
(Amp6)
V O7
(Amp7)
V O8
(Amp8)
H
H
L
L
H
H
L
L
H
L
—
—
—
—
—
—
—
—
H
L
H
H
L
L
H
H
L
L
—
—
—
—
—
—
—
—
* The ‘‘—’’ symbol means ‘‘amplifier output is OFF.’’
No. 5897- 2/6
LA6541
Block Diagram
Level shift
Level shift
BTL driver
BTL driver
BTL driver
BTL driver
Level shift
Level shift
Regulator
RESET
No. 5897- 3/6
LA6541
Sample Application Circuit
To VCC
Microcontroller
SANYO
Level
Level
shift
shift
BTL
BTL
driver
driver
BTL
BTL
driver
driver
Level
Level
shift
shift
Regulator
RESET
Microcontroller
equivalent
(connected to pins 1 and 24)
Note: Use a delay capacitor (Cd) whose capacitance does not change much according to the temperature.
No. 5897- 4/6
LA6541
Pin Functions
Pin No.
Pin Name
Equivalent Circuit
Description
1
VCC
Power supply (shorted with pin 24)
2
Mute
ON/OFF control for all BTL AMP outputs
3
VIN1
BTL AMP 1 input
4
VG1
BTL AMP 1 input (for gain control)
9
VG2
BTL AMP 2 input (for gain control)
10
VIN2
BTL AMP 2 input
15
VIN3
BTL AMP 3 input
16
VG3
BTL AMP 3 input (for gain control)
21
VG4
BTL AMP 4 input (for gain control)
22
VIN4
BTL AMP 4 input
5
VO1
BTL AMP 1 output (non-inverting side)
6
VO2
BTL AMP 1 output (inverting side)
7
VO3
BTL AMP 2 output (inverting side)
8
VO4
BTL AMP 2 output (non-inverting side)
17
VO5
BTL AMP 3 output (non-inverting side)
18
VO6
BTL AMP 3 output (inverting side)
19
VO7
BTL AMP 4 output (inverting side)
20
VO8
BTL AMP 4 output (non-inverting side)
11
REGOUT
12
REGIN
13
RES
14
Cd
Reset output delay time setting (with
capacitor)
23
VREF
Reference voltage input for level shift
circuit
24
VCC
Power supply (shorted with pin 1)
Connection for collector of external
transistor (PNP); 5 V supply output
Connection for base of external transistor
(PNP)
Reset output
Note: GND (minimum electrical potential) should be connected to the center frame of the pin.
No. 5897- 5/6
LA6541
Reset Operation
No products described or contained herein are intended for use in surgical implants, life-support systems,
aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like,
the failure of which may directly or indirectly cause injury, death or property loss.
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
1 Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and
distributors and all their officers and employees, jointly and severally, against any and all claims and litigation
and all damages, cost and expenses associated with such use:
2 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on
SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees
jointly or severally.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for
volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or
implied regarding its use or any infringements of intellectual property rights or other rights of third parties.
This catalog provides information as of July, 1998. Specifications and information herein are subject to change without notice.
PS No. 5897- 6/6