NXP Semiconductors SA58670A User Manual

General description, Features, Applications

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General description

The SA58670A is a stereo, filter-free class-D audio amplifier which is available in an
HVQFN20 package with the exposed Die Attach Paddle (DAP).

The SA58670A 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 rectification 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 SA58670A delivers 1.4 W/channel at 5.0 V and 720 mW/channel at 3.6 V into 8

. It

delivers 2.1 W/channel at 5.0 V into 4

. The maximum power efficiency is excellent at

70 % to 74 % into 4

and 84 % to 88 % into 8

. The SA58670A provides thermal and

short-circuit shutdown protection.



Output power:

2.1 W/channel into 4

at 5.0 V

1.4 W/channel into 8

at 5.0 V

720 mW/channel into 8

at 3.6 V

Supply voltage: 2.5 V to 5.5 V

Independent shutdown control for each channel

Selectable gain: 6 dB, 12 dB, 18 dB and 24 dB

High SVRR:

77 dB at 217 Hz

Fast start-up time: 3.5 ms

Low supply current

Low shutdown current

Short-circuit and thermal protection

Space savings with 4 mm


4 mm HVQFN20 package

Low junction to ambient thermal resistance of 24 K/W with exposed DAP



Wireless and cellular handset and PDA

Portable DVD player

USB speaker

Notebook PC

Portable radio and gaming


2.1 W/channel stereo class-D audio amplifier

Rev. 02 — 23 October 2008

Product data sheet