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
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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
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Reset with long ON-Keypress (5s, SW-
Interuptable)
−
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
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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
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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
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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
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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
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