Overview

The LA47202P is a 4-channel BTL power amplifier IC developed for use in car audio applications. The LA47202P adopts a pure complementary output stage circuit structure with a v-pnp transistor for the high side and an npn transistor for the low side to provide both high output power and high quality sound. The LA47202P integrates all the functions required for car audio applications on the same chip, including a standby switch, a muting function, and a full complement of protection circuits. It also features a self diagnostics function.

Functions

•High output : POmax = 47W (typ.) (VCC= 14.4V, f = 1kHz, JEITA max, RL= 4Ω)

                 : POmax = 29W (typ.) (VCC= 14.4V, f = 1kHz, THD = 10%, RL= 4Ω)

                  : POmax = 22W (typ.) (VCC= 14.4V, f = 1kHz, THD = 1%, RL= 4Ω)

•Muting function incorporated (pin 22)

•Built-in standby switch (pin 4)

•Self diagnostics function incorporated (pin 25) :

Output of both output offset detection, shorting to VCCor ground and load shorting signals

•Electric mirror noise decrease

•Full compliment of protection circuits (shorting to VCC, shorting to ground, load shorting, overvoltage, and thermal protection).

•Improved oscillation stability