BD27400GUL-E2

General Description 

BD27400GUL is a low voltage drive class-D monaural 

speaker amplifier that was developed for cellular 

telephones, mobile audio products and the others.

The LC filter of the speaker output is unnecessary and 

the external part can compose a speaker amplifier at 

three. 

Because the efficiency is high and is low consumption 

   power with the class-D operation, it is the optimal for the 

application of the battery drive. 

Also Current consumption of 0μA when standby and fast 

transitions from standby to active with little pop noise 

make it is suitable for applications that switch repeatedly 

between suspended and active. 

Features

 High output power

    2.5W typ.(VDD=5V, RL=4Ω, THD+N=10%, BTL）

 Very small package 9-Pin WL-CSP

 Gain selectable by external resistor 

 LC Filter less 

 Protection circuitry

 (Short protection, Thermal shutdown, 

 Under voltage lockout)

 Analogue differential input / PWM digital output

 Pop noise suppression circuitry

Applications 

 Mobile phone, Smart phone, Digital video camera