- charger
- DC adapter or USB input
- Thermally regulate the charge current
- Undervoltage lockout
- 50950 mA programmable charging current
- 3.0V to 5.5V input voltage range
- Thermal shutdown
-
I 2 A C-compatible interface controls the charger, LDO output, and audio output are enabled
- LDO's
- 7 Low noise LDO
- 2 ×300 mAh
- 3 ×150 mAh
- 2 ×80 mAh
- 2% (typical) output LDO voltage accuracy
- audio
- Fully differential amplification
- Capable of driving capacitive loads up to 100pF
- No output coupling capacitors, buffer networks, or bootstrap capacitors are required
- Space-saving 32-pin 5 × 5 mm LLP package
illustrate
The LP3921 is a fully integrated charger and fully differential Boomer audio power CDMA mobile phone designed amplifier multi-regulator. While the LP3921 features a high-speed serial interface for integrated and Li-Ion battery charge control, 7 low-noise low-dropout (LDO) regulators and a Boomer audio amplifier allowed.
The lithium-ion charger integrates a power FET, reverse galvanic isolation diode, current monitor output from a sense resistor, and requires very few external components. The charging temperature is regulated to obtain the most efficient charging speed given the ambient temperature.
LDO regulators provide high PSRR, low noise ideal for power supply, ideal for analog and digital loads.
This Boomer audio amplifier is capable of delivering less than 1% distortion (THD+N) to 1.1 watts of continuous average power into 8Ωbtl loads. Boomer audio power amplifiers are designed to provide high quality output power with a small number of external components. This Boomer audio amplifier does not require output coupling capacitors or starter capacitors, making it ideal for mobile phones and other low-voltage applications where minimum power dissipation and component count are primary requirements. This Boomer audio amplifier incorporates advanced POP and click-through circuitry that eliminates conduction noise and off-conversion.
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- CDMA mobile phone
- Low-power wireless handset
- Handheld information appliances
- Personal media player
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