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Part No.	PA3428G-N24-R
Manufacturer	UTC
Size	424 Kbytes
Pages	9 pages
Description	2W STEREO AUDIO AMPLIFIER

Datasheet Summary with AI

# PA3428 CMOS IC 2W Stereo Audio Amplifier

## Description
️· Single 5V supply operation
️· Delivers 2W output power per channel into 4Ω loads with <1% THD+N
️· Gain control via GAIN0 and GAIN1 terminals (2, 6, 12, 24V/V settings)
️· Internal gain control with minimal external components
️· Active-low shutdown mode and thermal shutdown protection

## Features
️· Internal depop circuitry
️· Output power: 2.0W (4Ω), 1.2W (8Ω) @ 1% THD+N
️· Operating Modes: Bridge-Tied Load (BTL) and Single-Ended (SE)
️· Stereo input
️· Fully differential input
️· Available in Lead-free (PA3428L) and Halogen-free (PA3428G) packages
️· TSSOP-24 package with Tape Reel or Tube packing options

## Pin Configuration (Key Pins)
️· GND/HS: Ground, thermal pad connection
️· GAIN0, GAIN1: Gain control inputs
️· LLINEIN, LHPIN: Left channel line/headphone inputs
️· RIN, LIN: Right/Left differential inputs
️· LOUT+, LOUT-, ROUT+, ROUT-: Left/Right channel outputs
️· SE/BTL: Mode selection (Low=BTL, High=SE)
️· HP/LINE: Input selection (High=Headphone, Low=Line)
️· SHUTDOWN: Shutdown control (Low=Shutdown)

## Absolute Maximum Ratings
️· Supply Voltage (VCC): 6V
️· Power Dissipation (TA ≤ 25°C): 2.7W
️· Operating Temperature Range: -40°C to +85°C

## Electrical Characteristics (Typical)
️· Supply Voltage (VDD): 5V
️· THD+N: <30m%
️· Output Power (BTL, 4Ω): 2W @ 1% THD+N
️· Output Power (BTL, 8Ω): 1.25W @ 1% THD+N
️· Shutdown Current (IDD(SD)): 160-300µA

## Application Information
️· Shutdown Mode: Controlled by SHUTDOWN, SE/BTL, HP/LINE pins
️· Input Capacitor (CI) selection impacts bass performance: CI = 1 / (2πRIFC)
️· Gain Setting: Determined by GAIN0, GAIN1, and input resistor (RI) based on table in document.