The WM9001 is a powerful, high-quality speaker driver that can run in Class D or AB mode, giving system designers complete flexibility. Available in 3x3mm QFN packaging, ideal for portable systems such as mobile phones, portable navigation devices, media players, laptops and electronic dictionaries.
Application program
Low leakage, high PSRR and eject/click suppression enable the battery to connect directly to the speaker power supply. Rf noise suppression techniques and differential design are used to suppress unwanted noise. Single - ended input has included full system flexibility.
Pin definition
The device is enabled by setting the logical "1" on the EN pin. Class D clocks can be generated by an internal oscillator or supplied by an external clock source. Flexible speaker enhancement options (no additional components required) allow for output volume maximization of a variety of spkvdd /AVDD combinations while minimizing internal power consumption
Features
● Class D and AB speaker driver modes for flexibility
● Speaker driver provides 1W into 8Q at < 0.1% THD
● SNR102dB(Class AB),97dB(Class D)
● Differential and single-ended input modes
● > 80dB PSRR @217Hz(SPKVDD)
● < 1uA typical leakage with direct battery connection
● Filterless speaker connection
● Fully differential architecture (differential mode)
● Poplclick suppression
● RF noise suppression
● Fully compatible with Wolfson CODECs
● including WM8990 /WM8991
● Internal oscillator or external clock source
● Thermal shutdown protection
● 3x3mm QFN package
Application program
● Mobile phones
● Portable navigation devices
● Portable media players
●Laptop computers and portable gaming devices
●Electronic dictionaries
●General-purpose high quality speaker amplifier
