WM9001: 1-W Mono Class AB/D Speaker Driver
Description
The WM9001 is a powerful, high quality speaker driver which can operate in class D or AB mode, providing total flexibility to the system designer. Low leakage, high PSRR and pop/click suppression enable direct battery connection to the speaker supply. RF noise suppression techniques and differential design are used to suppress undesired noise. A single-ended input option has been included for complete system flexibility.
The device is enabled by setting a logic ’1’ on the EN pin. The class D clock can be generated by an internal oscillator, or supplied from an external clock source.
Flexible speaker boost options (requiring no additional components) allow output volume to be maximised for various SPKVDD/AVDD combinations while minimising internal power consumption.
The WM9001 is available in a 3x3mm QFN package, ideal for portable systems such as mobile phones, portable navigation devices, media players, laptop computers and electronic dictionaries.
Features
- Class D and AB speaker driver modes for flexibility
- Speaker driver provides 1W into 8Ω at <0.1% THD
- SNR 104dB (Class AB), 97dB (Class D)
- Differential and single-ended input modes
- >80dB PSRR @ 217Hz (SPKVDD)
- <1µA typical leakage with direct battery connection
- Filterless speaker connection
- Fully differential architecture (differential mode)
- Pop/click suppression
- RF noise suppression
- Fully compatible with Wolfson CODECs including WM8990 / WM8991
- Internal oscillator or external clock source
- Thermal shutdown protection
- 3x3mm QFN package
Support
Ordering & Samples
