Functional Speaker Driver
1. General Descriptions
TRA1309AP is a speaker amplifier that can accept PWM signal and doesn’t need any external device
for these input signals. PWM input supports mainly for TRITAN’s PWM output. The TRA1309AP
contains advanced de-pop circuitry which eliminates pops during chip enable and disable. The gain can
be adjusted by connecting a resistor between RGAIN and SPKN to determine gain. Internal sound
processing is added for better sound quality.
z Accept PWM and doesn’t need any external devices for these input signals.
z Mute function
z Wide operation voltage : 2.4V~5.5V
z sound processing for better sound quality
z Auto power ON/OFF
z Low standby current : 2u A, typical.
z High output power Pout = 0.8W (VDD=5.5V, THD=1%)
3. Ordering Information
Part Number Package Type Description
Plastic dual in-line package; 8 leads (300mil); PWM mode
Plastic small outline package; 8 leads; body with 3.9 mm; PWM mode
4.1 Pin Configuration
z This chip only applicable for Tritan’s SPEECH series PWM and
TRITAN TECHNOLOGY INC.
Preliminary Specification / V1.4
2012/3/15 Page 1 of 9