Document Summary

The SIA9198WR1N is a mono digital input Class-D audio amplifier with a built-in 15V pre-charge dynamic boost converter, optimized for efficiently driving high peak power from small speakers.

It supports a wide supply voltage range of 2.1V to 9V. This Class D amplifier can drive speakers from 4Ω to 8Ω and provides up to 7.4W of output power (8Ω, no clipping) at a battery voltage of 4.2V; the output power can reach up to 12W at Vbat=8.4V (2 batteries).

The Y-bridge output architecture, powered by 1.8V and with related power control schemes, improves overall efficiency at low output power levels and in idle mode.

Integrated speaker voltage and current detection capabilities enable real-time monitoring of the speaker, helping external algorithms protect the speaker from damage.

To avoid popping sounds when muting during a large input signal, you can use soft volume control and the mute function.

The SIA9198WR1N also provides over-temperature protection, thermal foldback, overcurrent protection (for Y-bridge and main power stages), and undervoltage protection to protect the chip.

It offers fully configurable low-battery protection to control gain or maximum boost voltage and prevent system shutdown.

The SIA9198WR1N can be configured by an external processor via I2C. Up to four SIA9198WR1N devices can share the same bus via I2S/TDM and I2C interfaces.

The chip is packaged in a 36-ball WLCSP with a 0.35mm pitch. The product can operate over a wide temperature range of -40°C to +85°C.

Language: English

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