LM4670
FEATURES
- 23 No Output Filter Required for Inductive Loads
- Externally Configurable Gain
- Very Fast Turn on Time: 1.35ms (Typ)
- Minimum External ponents
- "Click and Pop" Suppression Circuitry
- Micro-Power Shutdown Mode
- Short Circuit Protection
- Available in Space-Saving DSBGA and WSON
Packages
APPLICATIONS
- Mobile Phones
- PDAs
- Portable Electronic Devices
KEY SPECIFICATIONS
- Efficiency at 3.6V, 100m W into 8Ω Speaker, 77% (Typ)
- Efficiency at 3.6V, 600m W into 8Ω Speaker, 88% (Typ)
- Efficiency at 5V, 1W into 8Ω Speaker, 87% (Typ)
- Quiescent Current, 3.6V Supply, 4.8m A (Typ)
- Total Shutdown Power Supply Current, 0.01µA
(Typ)
- Single Supply Range, 2.4 to 5.5V
DESCRIPTION
The LM4670 is a fully integrated single-supply high efficiency switching audio amplifier. It features an innovative modulator that eliminates the LC output filter used with typical switching amplifiers. Eliminating the output filter reduces external ponent count, simplifies circuit design, and reduces...
