Electronica

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.

Package Dimensions
unit : mm

3227-HSOP24
[LA6541]
15.3

Functions and Features

4.3 24

0.3 0.65 7.9 2.25 13

. 4-channel bridge(BTL) power amplifier. . I max. = 700 mA. . With mute circuit
O

0.3

0.8

0.1

SANYO : HSOP24

Specifications
Maximum Ratings at Ta = 25°C
Parameter Maximum supply voltage Maximum input voltage Mute pin voltage Allowable power dissipation Operating temperature Storage temperature Symbol VCC max VINB VMute Pd max Topr Tstg When using standard board 114.3 × 76.1 × 1.5 mm (material: glassepoxy) Conditions Ratings 14 13 13 2.3 –20 to +75 –55 to +150 Unit V V V W °C °C

Operating Conditions at Ta = 25°C
Parameter Recommended operating voltage Reset output source current Reset output sink current Symbol VCC IORH IORL Conditions Ratings 5.6 to 13 0 to 200 0 to 2 Unit V µA 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

2.5max

. .

(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).1

12 0.85

0.25

1.3

10.5

LA6541
Electrical Characteristics at Ta = 25°C, VCC = 8.0 V, VREF = 2.5 V
Parameter No-load current drain Symbol ICC1 ICC2 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 typ 20 15 max 40 35 +50 +50 VCC−1.5 VCC−1.5 5.6 1.8 9 0.15 1.2 5.0 20 50 4.98 100 4.3 100 10 2.4 Unit mA mA mV mV V V V V dB V/µs V V mV mV V mV V mV ms

–50 –50 1.5 1.0 5.0

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 gainVG 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 VRTNote 4 Reset hysteresis voltage Vhys Note 5 Reset output delay time td Cd = 0.1 µF

4.75

5.25 100 150 5.23 200 200

4.73

40

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 whenlow, 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 MUTE HL H L V O1 (Amp1) H — L — VO2 (Amp2) L — H — CH2 V O3 (Amp3) L — H — V O4 (Amp4) H — L — CH3 VO5 (Amp5) H — L — V O6 (Amp6) L — H — CH4 V O7 (Amp7) L — H — V O8 (Amp8) H — L —

H 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...