LM48823 - Texas Instruments

LM48823 Ceramic Speaker Driver

The LM48823 is a single supply, mono, ceramic speaker driver with an integrated charge-pump, designed for portable devices, such as cell phones, where board space is at a premium. The LM48823 charge pump allows the device to deliver 5.4VRMS from a single 4.2V supply. The LM48823 features high power supply rejection ratio (PSRR), 93dB at 217Hz, allowing the d.

Features

1
•2 Integrated Charge Pump
• Bridge-Tied Load Output
• High PSRR
• I2C Volume and Mode Control
• Reset Input
• Advanced Click-and-Pop Suppression
• Low Supply Current
• Minimum External Components
• Micro-Power Shutdown
• Available in Space-Saving 16-Bump DSBGA Package APPLICATIONS
• Cell Phones
• Smart Phones
• Portable Media Devices
• Notebook PCs KEY SPECIFICATIONS
• Output Voltage at VDD = 4.2V, RL = 2.2µF + 15Ω THD+N ≤ 1%: 5.4VRMS (typ)
• Quiescent Power Supply Current at 4.2V: 3.3mA (typ)
• PSRR at 217Hz: 93dB (typ)
• Shutdown Current: 0.01μA (typ) DESCRIPTION The LM48823 is a single s.