|
SA58670_08 Datasheet, PDF (1/25 Pages) NXP Semiconductors – 2.1 W/channel stereo class-D audio amplifier | |||
|
SA58670
2.1 W/channel stereo class-D audio ampliï¬er
Rev. 02 â 23 October 2008
Product data sheet
1. General description
The SA58670 is a stereo, ï¬lter-free class-D audio ampliï¬er which is available in an
HVQFN20 package with the exposed Die Attach Paddle (DAP).
The SA58670 features independent shutdown controls for each channel. The gain may be
set at 6 dB, 12 dB, 18 dB or 24 dB with gain select pins G0 and G1. Improved immunity to
noise and RF rectiï¬cation is increased by high PSRR and differential circuit topology. Fast
start-up time and small package makes it an ideal choice for both cellular handsets and
PDAs.
The SA58670 delivers 1.4 W/channel at 5.0 V and 720 mW/channel at 3.6 V into 8 â¦. It
delivers 2.1 W/channel at 5.0 V into 4 â¦. The maximum power efï¬ciency is excellent at
70 % to 74 % into 4 ⦠and 84 % to 88 % into 8 â¦. The SA58670 provides thermal and
short-circuit shutdown protection.
2. Features
I Output power:
N 2.1 W/channel into 4 ⦠at 5.0 V
N 1.4 W/channel into 8 ⦠at 5.0 V
N 720 mW/channel into 8 ⦠at 3.6 V
I Supply voltage: 2.5 V to 5.5 V
I Independent shutdown control for each channel
I Selectable gain: 6 dB, 12 dB, 18 dB and 24 dB
I High SVRR: â77 dB at 217 Hz
I Fast start-up time: 3.5 ms
I Low supply current
I Low shutdown current
I Short-circuit and thermal protection
I Space savings with 4 mm à 4 mm HVQFN20 package
I Low junction to ambient thermal resistance of 24 K/W with exposed DAP
3. Applications
I Wireless and cellular handset and PDA
I Portable DVD player
I USB speaker
I Notebook PC
I Portable radio and gaming
|
▷ |