Hot-selling and scarce AS3654B Power Management Unit with 18 Bit Audio DAC + Headphone Amplifier BGA

Product Descriptions

The AS3654 is a highly integrated solution for power supply generation and monitoring, battery management including charging. It is controlled via a serial control interface and integrates all necessary system specific functions such as clock, reset and interrupt generation, voltage and temperature monitoring.

Product Features

System Control

− Serial Control Interface

− On/Off Control Module

− Reset Generation for system controller

− Programmable Interrupt Controller

− Watchdog

− Low power off mode (9µA; 2.5V LDO on)

Supply Voltage Generation

− 1 RF Programmable Low Noise LDOs (400mA)

− 1 RF Programmable Low Noise LDOs (150mA)2 RF Programmable Low Noise LDOs (150mA)

− 2 Programmable Digital Low Power LDOs (200mA)

− 2 General Purpose PWM DC/DC step up converter with two programmable current sinks (e.g. for white led)

− 3 General Purpose high efficiency DC/DC step down converter

− 1 Low noise charge pump with 5V output voltage

− 1 Ultra Low Power 2.5V LDO (always on)

Current sinks

− 4 programmable(6-bit) from 0.625 to 40mA optional useable as GPIOs

− 3 programmable high voltage (15V) (6-bit) from 0.625 to 40mA

− internal PWM generator

10-bit Successive Approximation ADC

− 40µs conversation time

Battery Management

− Full featured chemistry independent step down charger with included Gas Gauge and  Current limitation

− 0.2 Ω Battery switch for start-up during trickle charging

− Integrated USB charger up to 400mA

Power Management Features

− Wide Battery Supply Range 3.0…5.5V

− On-Chip Bandgap Tuning for High Accuracy (±1 PERCENT)

− Current protection

− Thermal Protection with internal temperature sensor

Audio

− 18 Bit Audio DAC

− Two Digital Audio Inputs (I2S interface)

− 2.9V low Noise LDO for Audio DAC

− Headphone Amplifier Output with GND separation

− GND Buffer for Headphone Amplifier

− Line/ Headphone output with GND separation

Programmable System clock

− 1.6 MHz to 2.3 MHz with 100 kHz steps

Package

− BGA100 9x9mm, 0.8mm pitch 

Product Applications

Power Management Unit 

1 Cell Li+ or 3 Cell NiMH powered devices 

Car battery powered systems with and without internal battery

Product Photos

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