SANYO LA6544M Datasheet

Ordering number : ENN6295

42800RM (OT) No. 6295-1/7

Overview

The LA6544M is a 4-channel bridge (BTL) driver
developed for use in CD-ROM systems.

Functions

• Bridge connected (BTL) four-channel power amplifier

•VCE(residual voltage) minimized (channels 1 to 3) by
using two power supplies.

•IOmax: 1.0 A

• Muting circuit provided (output on/off control)

(MUTE pin: low for output off, high for output on.
MUTE1: controls channel 1, MUTE2: controls channels
2, 3, and 4.)

• Thermal protection (shutdown) circuit

• Separated output stage power supply (VS1: channels 1,
2, and 3, VS2: channel 4)

Package Dimensions

unit: mm

3129-MFP36SLF

0.25

15.3

118

36

19

0.85

0.4

0.8

2.5max

2.250.1

7.9

9.2

10.5

0.65

SANYO: MFP36SLF

[LA6544M]

LA6544M

SANYO Electric Co.,Ltd. Semiconductor Company

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

Four-Channel Bridge (BTL) Driver for CD-ROM

Monolithic Linear IC

Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.

SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.

0.4

0.8

1.2

0.9

2.1

1.6

2.0

2.4

0
–20 0 20 40 60 75 80 100

Allowable power dissipation, Pdmax — W

Pd max — Ta

Ambient temperature, Ta — °C

PCB: 76.1 × 114.3 × 1.6 mm3,
glass epoxy

1.26

0.54

Mounted on a PCB

Independent IC

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage 1 V

CC

max VCC≥ VS1, 2 14 V

Maximum supply voltage 2 V

S

max VS1, 2, VCC≥ VS1, 2 14 V

Input voltage V

IN

max Each of the input pins VIN1 to VIN413V

MUTE pin voltage V

MUTE

max 13 V

Allowable power dissipation Pd max

Independent IC 0.9 W

Mounted on the specified PCB (76.1 × 114.3 × 1.6 mm3, glass epoxy) 2.1 W
Operating temperature Topr –20 to +75 °C
Storage temperature Tstg –55 to +150 °C

Specifications

Maximum Ratings at Ta = 25°C

No. 6295-2/7

LA6544M

Parameter Symbol Conditions Ratings Unit

Operating supply voltage

V

CC

VCC≥ VS1, 2 4 to 13 V

V

S

1, 2

V

S

1 and VS2 are the output stage power supply.

4 to 13 V

V

CC

≥ VS1 and VS2

Recommended Operating Conditions at Ta = 25°C

Parameter Symbol Conditions

Ratings

Unit

min typ max

V

CC

no load current drain 1 ICC-ON Output on (MUTE1 and MUTE2: high), V

CC

10 25 mA

V

CC

no load current drain 2 ICC-OFF Output off (MUTE1 and MUTE2: low), V

CC

4mA

VS1 no load current drain 1 I

S

1-ON Output on (MUTE1 and MUTE2: high), VS12035mA

VS1 no load current drain 2 I

S

2-OFF Output off (MUTE1 and MUTE2: low), VS14mA

VS2 no load current drain 1 I

S

2-ON Output on (MUTE1 and MUTE2: high), VS2510mA

VS2 no load current drain 2 I

S

2-OFF Output off (MUTE1 and MUTE2: low), VS24mA

Output offset voltage V

OF

1 to 4

Potential difference between the + and – outputs for each

–50 +50 mV

channel

Input voltage range 1 V

IN

1 Input voltage range for channels 1, 2, and 3 0 VS1V

Input voltage range 2 V

IN

2 Input voltage range for channel 4 0 VS2V

Output voltage 1 VO1

I

O

= 700 mA, the difference between the outputs for

4 4.5 V

channels 1, 2, and 3

Output voltage 2 VO2

IO= 700 mA, the difference between the outputs for

10.5 11 V

channel 4

Closed circuit voltage gain

VG1 The BTL amplifier voltage gain for channels 1, 2, and 3 7 dB
VG2 The BTL amplifier voltage gain for channel 4 14 dB

Slew rate SR *

1

0.5 V/µs

Muting on voltage V

MUTE

MUTE1 and MUTE2. The voltage at which the output

1.5 2 V

turns on. *

2

Electrical Characteristics at Ta = 25°C, VCC= VS2 = 12 V, VS1 = 5 V, V

REF

= 2.5 V

Notes: 1. Design guarantee value.

2. The MUTE1, and MUTE2 pins turn the output on when high and off when low. When the output is off, the outputs will be in the high-impedance
state.
The figure below shows the relationship between the channels and the MUTE pins and between the channels and the power supplies.

System Figure

MUTE1 CH1 (7 dB)

CH2 (7 dB)

MUTE2 CH3 (7 dB)

CH4 (14 dB)

VS1

VS2

A12681

Block Diagram and Pin Assignment

No. 6295-3/7

LA6544M

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

RF

RF

(NC)

VSS2

VSS2-OUT

MUTE1 MUTE1

11 kΩ

12.5 kΩ

VIN1

VG1

VIN2

VG2

VIN3

VG3

VIN4

VG4

MUTE2

V

CC

RF

RF

36

35

34

33

32

31

30

29

28

27

26

25

24

23

22

21

20

19

RF

RF

VSS1

VSS1-OUT

VO1

+

VO1

–

VS1

VO2

+

VO2

–

VO3

+

VO3

–

VS2

VO4

+

VO4

–

V

REF

OUT

V

REF

IN

RF

RF

MUTE2

–
+

–
+

–
+

–
+

11 kΩ

12.5 kΩ

–
+

11 kΩ

12.5 kΩ

–
+

11 kΩ

27.5 kΩ

–
+

Input stage power supply

(all channels)

VS1 power supply

(channels 1, 2, and 3)

VS1 power supply (channel 4)

Thermal shutdown circuit

MUTE1

Channel 1 output on/off

MUTE2

Channels 2, 3, and 4 output on/off

A12682