1.2 W/channel stereo class-D audio ampliﬁer
Rev. 01 — 21 December 2007
Product data sheet
1. General description
The SA58671 is a stereo, ﬁlter-free class-D audio ampliﬁer which is available in a
16 bump WLCSP (Wafer Level Chip-Size Package).
The SA58671 features independent shutdown controls for each channel. The gain can be
set at 6 dB, 12 dB, 18 dB or 24 dB using G0 and G1 gain select pins. Improved immunity
to noise and RF rectiﬁcation is increased by high PSRR and differential circuit topology.
Fast start-up time and very small WLCSP package makes it an ideal choice for both
cellular handsets and PDAs.
The SA58671 delivers 1.3 W/channel at 5 V and 720 mW/channel at 3.6 V into 8 Ω. It
delivers 1.2 W/channel at 5 V into 4 Ω. The maximum power efﬁciency is excellent at
70 % to 74 % into 4 Ω and 84 % to 88 % into 8 Ω. The SA58671 provides thermal and
short-circuit shutdown protection.
I Output power:
N 1.2 W/channel into 4 Ω at 5 V
N 1.3 W/channel into 8 Ω at 5 V
N 720 mW/channel into 8 Ω 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: −77 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 2.06 mm × 2.11 mm 16 bump WLCSP package
I Low junction to ambient thermal resistance of 110 K/W with adequate heat sinking of
I Wireless and cellular handsets and PDA
I Portable DVD player
I USB speaker
I Notebook PC