AS3658
Product Brief
AS3658
Product Brief
Power and Audio Management Unit for Portable Devices
1 General Description
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High Current (1.0A) Linear Charger with
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.
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
2 Key Features
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System Control
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Serial Control Interface
On/Off Control Module with Boot-ROM /
GPIO
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Charging Timeout (1h-8h in 30min steps)
Charging in Stanby mode
Completely Autonomous (no SW)
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Reset Generation for system controller
Programmable Interrupt Controller and
Watchdog
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
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Low power off mode (9μA; 2.5V LDO on)
88 bit unique ID or Boot fuse array
Reset with long ON-Keypress (5s, SW-
Interuptable)
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Touchscreen Interface (10 bit, interrupt)
Supply Voltage Generation
Audio
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2 RF Programmable Low Noise LDOs
(250mA)
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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
(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)
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3 General Purpose high efficiency DC/DC
step down converter (DCDC 1 support
DVM)
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1 Low noise charge pump with 5V output
voltage
1 Ultra Low Power 2.5V LDO (always on)
PCM Interface
Real Time Clock (RTC)
Current sinks
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Alarm and Time function
Repeated Wakeup (every sec. or minute)
32kHz output
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4 programmable(8-bit) from 0.15mA to
38.25mA (+/-5% ) optional useable as
GPIOs
Backup Battery Charger and Switchover
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3 programmable high voltage (15V) (8-bit)
from 0.15mA to 38.25mA (+/-5% )
internal PWM generator (extended time
range)
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)
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(can control DCDC_CURR1,2,3)
10-bit 40μs Successive Approximation ADC
Two external Inputs (ADC_IN1, ADC_IN2)
Battery Management
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3 Application
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Full featured chemistry independent step
down charger with Gas Gauge and Current
limitation
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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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