LP3921SQ/NOPB
NRNDBATTERY CHARGER MANAGEMENT AND REGULATOR UNIT WITH INTEGRATED BOOMER AUDIO AMPLIFIER
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LP3921SQ/NOPB
NRNDBATTERY CHARGER MANAGEMENT AND REGULATOR UNIT WITH INTEGRATED BOOMER AUDIO AMPLIFIER
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Technical Specifications
Parameters and characteristics for this part
| Specification | LP3921SQ/NOPB |
|---|---|
| Battery Chemistry | Lithium Ion |
| Battery Pack Voltage | 4.2 V |
| Charge Current - Max [Max] | 950 mA |
| Current - Charging | Constant - Programmable |
| Fault Protection | Reverse Current, Over Temperature |
| Interface | I2C |
| Mounting Type | Surface Mount |
| Number of Cells | 1 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Supplier Device Package | 32-WQFN (5x5) |
| Voltage - Supply (Max) | 5.5 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tape & Reel (TR) | 1000 | $ 1.82 | |
| 2000 | $ 1.72 | |||
| 5000 | $ 1.66 | |||
| Texas Instruments | SMALL T&R | 1 | $ 2.98 | |
| 100 | $ 2.61 | |||
| 250 | $ 1.83 | |||
| 1000 | $ 1.48 | |||
Description
General part information
LP3921 Series
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.
Documents
Technical documentation and resources