SANYO LA6541 Datasheet

Ordering number: EN 5897

Monolithic Linear IC

LA6541

4-channel Bridge Driver

for Compact Discs

Overview

The LA6541 is a 4-channel bridge (BTL) driver with a 5 V
power supply (uses an external PNP transistor) developed for
compact discs.

Functions and Features

.

4-channel bridge (BTL) power amplifier.

.

IOmax. = 700 mA.

.

With mute circuit
(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).

Specifications

Package Dimensions

unit : mm

3227-HSOP24

[LA6541]

15.3

24

1

4.3 0.3

0.3

0.8 0.85

13

7.9

12

2.25

0.1

SANYO : HSOP24

0.25

2.5max

0.65

10.5

1.3

Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
Maximum input voltage V
Mute pin voltage V

Allowable power dissipation Pd max

Operating temperature Topr –20 to +75 °C
Storage temperature Tstg –55 to +150 °C

max 14 V

CC

B13V

IN

Mute

When using standard board

114.3 × 76.1 × 1.5 mm
(material: glass epoxy)

13 V

2.3 W

Operating Conditions at Ta = 25°C

Parameter Symbol Conditions Ratings Unit
Recommended operating voltage V
Reset output source current I
Reset output sink current I

CC
ORH
ORL

5.6 to 13 V
0 to 200 µA

0to2 mA

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73098HA (II) No.5897- 1/6

LA6541

Electrical Characteristics at Ta = 25°C, VCC= 8.0 V, V

Parameter Symbol

No-load current drain

V

Output offset voltage

V

Buffer amplifier input voltage
range

Input voltage range V
Output source voltage V
Output sink voltage V

I

1 When all amplifier outputs are on (Mute high) 20 40 mA

CC

I

2 When all amplifier outputs are off (Mute low) 15 35 mA

CC

OF

OF

V

BIN

IN
O
O

Amplifier 1 to 2 (V

1

Amplifier 3 to 4 (V
Amplifier 5 to 6 (V

2

Amplifier 7 to 8 (V

1 Note 1, when RL= 8.0 Ω 5.0 5.6 V
2 Note 2, when RL= 8.0 Ω 1.8 2.4 V

Conditions

1toVO2),

O

3toVO4)

O

5toVO6),

O

7toVO8)

O

REF

= 2.5 V

min typ max Unit

–50 +50 mV

–50 +50 mV

1.5

1.0

VCC−1.5
VCC−1.5

Closed-circuit voltage gain VG Between bridge amplifiers 9 dB
Slew rate SR 0.15 V/µs
Mute on voltage V

Mute

Note 3 1.2 V
[Power Supply] (with 2SB632K connected externally)
Output voltage V
Line regulation ∆V
Load regulation ∆V

1I

OUT

OLN
OLD

= 200 mA 4.75 5.0 5.25 V

O

1 5.6 V % VIN1 % 12 V 20 100 mV

15mA%IO%200 mA 50 150 mV
[Reset]
High reset output voltage V
Low reset output voltage V
Reset threshold voltage V

ORH
ORL

RT

I

= 200 µA, Cd pin open 4.73 4.98 5.23 V

ORH

I

= 2 mA, Cd is shorted to GND 100 200 mV

SRL

Note 4 4.3 V
Reset hysteresis voltage Vhys Note 5 40 100 200 mV
Reset output delay time t

d

Cd = 0.1 µF 10 ms

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.

V
V

Truth Table

Input MUTE

H

L

Pd max – Ta

With PCB

Allowable power dissipation, Pd max – W

Ambient temperature, Ta – °C

CH1 CH2 CH3 CH4

V

1

O

(Amp1)

VO2

(Amp2)

VO3

(Amp3)
HHL LHHLLH
L ————————
HLHHLLHHL
L ————————

2.3

VO4

(Amp4)

VO5

(Amp5)

1.38

VO6

(Amp6)

VO7

(Amp7)

VO8

(Amp8)

* The ‘‘—’’ symbol means ‘‘amplifier output is OFF.’’

No. 5897- 2/6