AS3658

AS3658 Product Brief AS3658 Power and Audio Management Unit for Portable Devices 1 General Description The AS3658 is highly integrated power and audio management unit. It includes all the features from the AS3654 and adds on top an 16 bit Audio ADC, a second headphone amplifier, a microphone bias with amplifier, a RTC with alarm and time function, an unique ID block and three more LDOs. Product Brief 2 Key Features System Control − Serial Control Interface − On/Off Control Module with Boot-ROM / GPIO − Reset Generation for system controller − Programmable Interrupt Controller and Watchdog − Low power off mode (9μA; 2.5V LDO on) − 88 bit unique ID or Boot fuse array − Reset with long ON-Keypress (5s, SWInteruptable) − Touchscreen Interface (10 bit, interrupt) Supply Voltage Generation − 2 RF Programmable Low Noise LDOs (250mA) (1 LDO can be a current controlled switch for hotplug (200mA +/-40%)) − 1 RF Programmable Low Noise LDO (400mA) − 4 Programmable Dig. Low Power LDOs(200mA) − 2 General Purpose PWM DC/DC step up converter with three programmable current sinks (e.g. for white led); for current mode feedback is automatically slected (DCDC_CURR1,2,3) − 3 General Purpose high efficiency DC/DC step down converter (DCDC 1 support DVM) − 1 Low noise charge pump with 5V output voltage − 1 Ultra Low Power 2.5V LDO (always on) Current sinks − 4 programmable(8-bit) from 0.15mA to 38.25mA (+/-5% ) optional useable as GPIOs − 3 programmable high voltage (15V) (8-bit) from 0.15mA to 38.25mA (+/-5% ) − internal PWM generator (extended time range) (can control DCDC_CURR1,2,3) 10-bit 40μs Successive Approximation ADC − Two external Inputs (ADC_IN1, ADC_IN2) Battery Management − Full featured chemistry independent step down charger with Gas Gauge and Current limitation High Current (1.0A) Linear Charger with external pass transistor (no SD charger) − 0.1 Ω Battery switch for start-up and trickle charge − Integrated USB charger up to 880mA (can be used as wall adapter charger); current accuracy 440-500mA for USB specification, in-circuit trimmable (+/-1.2% trimsteps) − Autonomous Battery Temperature Supervision (0°C-45°C or 0°C- 50°C) for 10k and 100k NTC − Charging Timeout (1h-8h in 30min steps) − Charging in Stanby mode − Completely Autonomous (no SW) Power Management Features − Wide Battery Supply Range 3.0…5.5V − High Accuracy Reference (±1%) − Thermal and Current Protection (int. sensor) − Standby Mode exit by interrupt e.g.Onkey/RTC Audio − 94dB Audio DAC, 16-48kHz sampling rate − Two Digital Audio Inputs (2 x I2S interface) − 2.9V low Noise LDO for Audio DAC − Two Headphone Amplifier Output with GND separation − Two I2S Inputs and one I2S Output − I2S master mode with programmable sample rate (controlled by internal PLL) − GND Buffer for Headphone Amplifier − Line/ Headphone outputs with GND separation − Audio ADC, 82dB SNR with 16ksps − Mono Microphone Supply and Amplifier − 5 Band Adjustable Audio Equalizer (+/12dB in 3dB gain steps) − SPDIF Output − Audio Mixer and Gain Stages − PCM Interface Real Time Clock (RTC) − Alarm and Time function − Repeated Wakeup (every sec. or minute) − 32kHz output − Backup Battery Charger and Switchover Programmable System clock − 1.6 MHz to 2.3 MHz with 100 kHz steps Package − BGA124 8x8mm, 0.5mm pitch (can be assembled without microvia boards) − 3 Application − − PDA, PMP, GPS-Navigation System 1 Cell Li+ or 3 Cell NiMH powered devices www.austriamicrosystems.com (ptr) Revision 1.4 / 20071217 1-3 AS3658 Product Brief Figure 1 – Blockdiagram AS3658 1 x 0.6V-3.4V / up to 1600mA 2 x 0.6V-3.4V / 500mA VOUT1 VOUT2 VOUT3 VSUPPLY, VOUT1-3 VDIG1 200mA VDIG2 200mA VDIG3 200mA DCDC Step Down DVM VBUS VSUPPLY USB Charger (