LP3921是TI公司的一款无产品，LP3921是具有集成 Boomer 音频放大器的电池充电器管理和稳压器单元，本页介绍了LP3921的产品说明、应用、特性等，并给出了与LP3921相关的TI元器件型号供参考。
LP3921 - 具有集成 Boomer 音频放大器的电池充电器管理和稳压器单元 - 无 - 电源管理多通道IC(PMIC)解决方案 - TI公司（Texas Instruments，德州仪器）
The LP3921 is a fully integrated charger and multi-regulator unit with a fully differential Boomer audio power amplifier designed for CDMA cellular phones. The LP3921 has a high-speed serial interface which allows for the integration and control of a Li-Ion battery charger, 7 low-noise low-dropout (LDO) voltage regulators and a Boomer audio amplifier.
The Li-Ion charger integrates a power FET, reverse current blocking diode, sense resistor with current monitor output, and requires only a few external components. Charging is thermally regulated to obtain the most efficient charging rate for a given ambient temperature.
LDO regulators provide high PSRR and low noise ideally suited for supplying power to both analog and digital loads.
The Boomer Audio Amplifier is capable of delivering 1.1 watts of continuous average power to an 8? BTL load with less than 1% distortion (THD+N). Boomer Audio Power Amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The Boomer Audio Amplifier does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption and part count is the primary requirement. The Boomer Audio Amplifier contains advanced pop & click circuitry which eliminates noises during turn-on and turn-off transitions.
- Charger
- DC Adapter or USB Input
- Thermally Regulated Charge Current
- Under Voltage Lockout
- 50 to 950 mA Programmable Charge Current
- 3.0V to 5.5V Input Voltage Range
- Thermal Shutdown
- I2C-Compatible Interface for Controlling Charger, LDO Outputs and Enabling Audio Output
- LDO's 7 Low-Noise LDO’s
- 2 x 300 mA
- 3 x 150 mA
- 2 x 80 mA
- Audio
- Fully Differential Amplification
- Ability to Drive Capacitive Loads up to 100 pF
- No Output Coupling Capacitors, Snubber Networks or Bootstrap Capacitors Required
- Space-Efficient 32-pin 5 x 5 mm WQFN Package
