Diodes Incorporated has unveiled the PAM8019E, a stereo 4W Class-D audio-power amplifier for driving bridged-tied speakers and includes a stereo Class-AB amplifier for driving headphones. With advanced 62-step DC volume control to minimize external components, PAM8019E is capable of allowing simple and accurate volume control over the gain range of +20 dB (Volume = 0 V) to -60 dB (Volume = VDD).
Integrated with a spread spectrum modulation (SSM) design for EMI suppression, the PAM8019E enables the use of inexpensive ferrite bead filters. The integrated non-clip power limit (PLIM) technology suppresses output automatically with a programmable power limit while improving the sound quality and helping to protect the speakers.
The PAM8019E supports the speaker's open short detection during startup to protect the whole audio system before normal operation starts. Protection features also include undervoltage protection, DC input protection, short-circuit protection on all audio outputs, and thermal shutdown of the entire system.
The PAM8019E is designed to be pop-free for the Class-D amplifier and headphone driver under all kinds of operating conditions. The PAM8019E is available in the power-efficient and space-saving U-QFN4040-20 and U-QFN3030-20 packages.
Key Features
- Operating Voltage: 2.5 V to 6.0 V
- 4 W Stereo Class D with 88mW Class-AB Headphone Driver
- Output Power
- Class-D Amplifier THD+N = 10%
VDD = 5 V: RL = 4 Ω, PO = 3 W; RL = 8 Ω, PO = 1.78 W
VDD = 5.8 V: RL = 4 Ω, PO = 4 W; RL = 8 Ω, PO = 2.34 W
- Class-D Amplifier THD+N = 1%
VDD = 5 V: RL = 4 Ω, PO = 2.41 W; RL = 8 Ω, PO = 1.44 W
VDD = 5.8 V: RL = 4 Ω, PO = 3.27 W; RL = 8 Ω, PO = 1.92 W
- Class-AB Headphone Amplifier THD+N = 1%
VDD = 5 V, RL = 32 Ω, PO = 66 mW
VDD = 5.8 V, RL = 32 Ω, PO = 88 mW
- 40 µVrms Noise of Class-D Amplifier at the max Gain
- 90% Efficiency at VDD = 5 V, PO = 3 W x 2 ch, 4 Ω Loading
- 62 Step DC Volume Control with Hysteresis from -60 dB to +20 dB
- Non-clip power Limit (NCPL) and AGC Function
- Speaker Open Short Detection During Startup
- SSM Help Easily Pass EMI with Simple FB-C
- Thermal and Overcurrent Protection with Auto-Recovery
- Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
- Halogen and Antimony Free. “Green” Device (Note 3)
- For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities)
Key Applications
- LCD monitors and TVs
- Projectors/all-in-one computers
- Portable/active speakers
- Bone conductive headphones
- DVD players
