LP3921 Series
Battery Charger Management and Regulator Unit with Integrated Boomer Audio Amplifier
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
Battery Charger Management and Regulator Unit with Integrated Boomer Audio Amplifier
| Part | Battery Pack Voltage | Charge Current - Max [Max] | Interface | Current - Charging | Supplier Device Package | Operating Temperature [Max] | Operating Temperature [Min] | Number of Cells | Voltage - Supply (Max) [Max] | Mounting Type | Battery Chemistry | Fault Protection |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments LP3921SQ/NOPB | 4.2 V | 950 mA | I2C | Constant - Programmable | 32-WQFN (5x5) | 85 °C | -40 °C | 1 | 5.5 V | Surface Mount | Lithium Ion | Over Temperature, Reverse Current |
Texas Instruments LP3921SQX/NOPB | 4.2 V | 950 mA | I2C | Constant - Programmable | 32-WQFN (5x5) | 85 °C | -40 °C | 1 | 5.5 V | Surface Mount | Lithium Ion | Over Temperature, Reverse Current |
Key Features
• ChargerDC Adapter or USB InputThermally Regulated Charge CurrentUnder Voltage Lockout50 to 950 mA Programmable Charge Current3.0V to 5.5V Input Voltage RangeThermal ShutdownI2C-Compatible Interface for Controlling Charger, LDO Outputs and Enabling Audio OutputLDO's 7 Low-Noise LDO’s2 x 300 mA3 x 150 mA2 x 80 mA2% (typ.) Output Voltage Accuracy on LDO'sAudioFully Differential AmplificationAbility to Drive Capacitive Loads up to 100 pFNo Output Coupling Capacitors, Snubber Networks or Bootstrap Capacitors RequiredSpace-Efficient 32-pin 5 x 5 mm WQFN PackageAll trademarks are the property of their respective owners.ChargerDC Adapter or USB InputThermally Regulated Charge CurrentUnder Voltage Lockout50 to 950 mA Programmable Charge Current3.0V to 5.5V Input Voltage RangeThermal ShutdownI2C-Compatible Interface for Controlling Charger, LDO Outputs and Enabling Audio OutputLDO's 7 Low-Noise LDO’s2 x 300 mA3 x 150 mA2 x 80 mA2% (typ.) Output Voltage Accuracy on LDO'sAudioFully Differential AmplificationAbility to Drive Capacitive Loads up to 100 pFNo Output Coupling Capacitors, Snubber Networks or Bootstrap Capacitors RequiredSpace-Efficient 32-pin 5 x 5 mm WQFN PackageAll trademarks are the property of their respective owners.
Description
AI
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 8Ω 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.
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 8Ω 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.