O0808 MS JK/92900RM(OT) No.6632-1/8

http://onsemi.com

Semiconductor Components Industries, LLC, 2013

May, 2013

LA4628

Overview

The LA4628 is a 2-channel general-purpose BTL audio power amplifier provided in a miniature package. It was

designed for the best possible audio quality and features an extended low band roll-off frequency provided by a

newly-developed NF circuit that does not require an external capacitor. Furthermore, crosstalk, which can cause

muddiness in the audio output, has been significantly reduced by both circuit and wiring pattern improvements. Thus

this amplifier can provide powerful lows and clear highs.

Note that this device is pin compatible with the 13.5W

×2-channel LA4625, and allows end products differentiated by

their power rating to share the same printed circuit board.

Features

• Total output : 20W+20W (at VCC = 13.5V, RL = 4Ω, THD = 10%)

• High-fidelity design (fL < 10Hz, fH = 130kHz)

• Extremely low impulse noise levels

• An arbitrary amplifier startup time can be set up with external components.

• Full complement of built-in protection circuits (includes circuits that protect against shorting to VCC, shorting to

ground, load shorting, overvoltages and excessive temperatures)

Specifications

Maximum Ratings at Ta = 25

°C

Parameter

Symbol

Conditions

Ratings

Unit

Maximum supply voltage

VCC max

No signal

24

V

Maximum output current

IO peak

Per channel

4

A

Allowable power dissipation

Pd max

With an arbitrarily large heat sink

32.5

W

Operating temperature

Topr

-20 to +85

°C

Storage temperature

Tstg

-40 to +150

°C

Ordering number : EN6632A

Monolithic Linear IC

20W 2-Channel BTL Power Amplifier

for General Audio

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating

Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.