SANYO LA6557H Datasheet

Ordering number : ENN6350

51900RM (OT) No. 6350-1/8

Overview

The LA6557H is a five-channel bridge driver developed
for use in CD and MD players. It provides four BTL
power amplifier channels and one H-bridge power
amplifier channel.

Features and Functions

• Four BTL power amplifier channels and one H-bridge
power amplifier channel

•IOmax: 700 mA (each channel)

• Built-in level shifter circuits (BTL amplifiers)

• One muting circuit (output on/off control) system that
operates for the BTL amplifiers

• Thermal shutdown circuit built in

Package Dimensions

unit: mm

3234-HSOP28H-C

6.2

28 15

14

1

0.8

15.3

2.7

0.3

4.9

1.3

10.5

0.65

0.25

0.85

7.9

2.25

2.5max

0.1

SANYO: HSOP28H-C (375mil)

[LA6557H]

LA6557H

SANYO Electric Co.,Ltd. Semiconductor Company

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

Five-Channel Bridge Driver for MD and CD Players

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.

Parameter Symbol Conditions Ratings Unit

Supply voltage V

CC

max 14 V

Maximum output current I

O

max For each channel in channels 1 to 5 0.7 A

Maximum input voltage V

IN

Bmax 13 V

Mute pin voltage V

MUTE

13 V

Allowable power dissipation Pd max

Independent IC 0.82 W

Mounted on the specified printed circuit board* 2.0 W
Operating temperature Topr –30 to +85 °C
Storage temperature Tstg –55 to +150 °C

Note: * Specified printed circuit board: 76.1 × 114.3 × 1.6 mm3glass-epoxy PCB

Specifications

Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Recommended supply voltage V

CC

5.6 to 13 V

Operating Conditions at Ta = 25°C

No. 6350-2/8

LA6557H

3.0

2.5

2.0

1.5

1.0

0.82

1.04

0.43

0.5

–

40–20

020406080100

0

Pd max — Ta

Allowable power dissipation, Pdmax — W

Independent IC

Ambient temperature, Ta — °C

–

30

Mounted on the specified printed circuit board
(76.1 × 114.3 × 1.6 mm

3

glass-epoxy board)

Parameter Symbol Conditions

Ratings

Unit

min typ max

No-load current drain: on I

CC

-ON All outputs on*1, FWD = REV = 0 V 30 50 mA

No-load current drain: off I

CC

-OFF All outputs off*1, FWD = REV = 0 V 10 20 mA

V

REF

input voltage range V

REF

-IN 1 VCC–1 V

[BTL Amplifier Block]

Output offset voltage V

OFF

The voltage difference between outputs for the

–50 +50 mV

BTL amplifiers

Input voltage range V

IN

The input voltage range 0 V

CC

V

Output voltage V

O

The voltage between VO+ and VO– for each channel

45 V

when R

L

= 8 Ω.*

2

Closed-circuit voltage gain V

G

Gain from input to output 12 dB

Slew rate SR

For independent amplifiers. Twice when measured

0.5 V/µs

between outputs *

4

Mute on voltage V

MUTE

-ON For each MUTE *

3

0.5 V

Mute off voltage V

MUTE

-OFF For each MUTE *

3

2V

[H Bridge Block]

Output voltage V

O

-LOAD

The voltage between V

O

+ and VO– for each channel

6V

when R

L

= 8 Ω.*

2

Low-level input voltage VIN-L 1V
High-level input voltage V

IN

-H 2 V

[Regulator Block]

Output voltage Vreg I

L

= 100 mA 4.75 5 5.25 V

Output load regulation ∆V

RLIL

= 0 to 200 mA –50 0 10 mV

Supply voltage regulation ∆VV

CCVCC

= 6 to 12 V, IL= 100 mA –15 21 60 mV

Electrical Characteristics at Ta = 25°C, VCC1 = VCC2 = 8 V, V

REF

= 1.65 V

Notes:1. The total current drain for VCC1 and VCC2 with no load.

2. The voltage across an 8 Ω load. With the output saturated.

3. MUTE: When the MUTE pin is high, the outputs will be on, and when low, off (high impedance)

4. These values are design guarantee values, and are not tested.

No. 6350-3/8

LA6557H

Pin Assignment

MUTE

1 2 3 4 5

1516

10 11 12 13 14

FR

27 26 22 21 20 19

FR

V

CC

1

V

O

1–

V

O

1+

V

O

2+

V

O

2–

V

O

4–

FWD

REV

V

O

5–

V

O

5+

V

O

3+

V

O

4+

V

IN

3

REG-IN

V

CC

-S

6 7 8 9

171823242528

V

IN

4G

V

IN

4

V

IN

2G

V

IN

3G

V

O

3–

V

CC

2

REG-OUT

V

REF

-IN

S-GND

V

IN

2V

IN

1G

V

IN

1

LA6557H

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