AMS AS3658 is a highly integrated power and audio management unit that includes two RF Programmable Low Noise LDOs (250mA), one RF Programmable Low Noise LDO (400mA), four Programmable Digital Low Power LDOs (200mA), and two General Purpose PWM DC/DC step up converter with two programmable current sinks (e.g. for white led). Furthermore, it consists of three General Purpose high efficiency DC/DC step down converter, one Low noise charge pump with 5V output voltage, and one Ultra Low Power 2.5V LDO (always on).
AMS AS3658 is a highly integrated power and audio management unit that includes two RF Programmable Low Noise LDOs (250mA), one RF Programmable Low Noise LDO (400mA), four Programmable Digital Low Power LDOs (200mA), and two General Purpose PWM DC/DC step up converter with two programmable current sinks (e.g. for white led). Furthermore, it consists of three General Purpose high efficiency DC/DC step down converter, one Low noise charge pump with 5V output voltage, and one Ultra Low Power 2.5V LDO (always on).
austriamicrosystems AG
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ams AG
The technical content of this austriamicrosystems document is still valid.
Contact information:
Headquarters:
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Tel: +43 (0) 3136 500 0
e-Mail: ams_sales@ams.com
Please visit our website at www.ams.com
Revision 1.0, Preliminary Page 1 of 20
austriamicrosystems
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.
2 Key Features
Difference to the AS3654 are marked in boldface
italics:
System Control
• Serial Control Interface
• On/Off Control Module with Boot-ROM
• On/Off Control of regulators with GPIO
input
• Reset Generation for system controller
• Programmable Interrupt Controller
• Watchdog
• Low power off mode (9A; 2.5V LDO on)
• 88 bit unique ID or Boot fuse array
• Reset or Shutdown with long ON-Keypress
(5s,SW-Interuptable)
Supply Voltage Generation
• 2 RF Programmable Low Noise LDOs
(250mA)
• 1 RF Programmable Low Noise LDO (400mA)
• 4 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); for current mode feedback is
automatically slected (DCDC_CURR1,2,3)
• 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(8-bit) from 0.15mA to 38.25mA
• optional useable as GPIOs
• 3 programmable high voltage (15V) (8-bit)
from
• 0.15mA to 38.25mA
• +/-5% Current Accuracy
• internal PWM generator (extended time
range)
10-bit Successive Approximation ADC
• 40s conversation time
• Two external Inputs (ADC_IN1, ADC_IN2)
Battery Management
• Full featured chemistry independent step down
charger with included Gas Gauge and Current
limitation
• High Current (1.0A) Linear Charger with
external pass transistor (if step down
charger is not used)
• 0.2 Ω Battery switch for start-up during trickle
charging
• Integrated USB charger up to 800mA (can
be used as wall adapter charger); EOC by
• measuring current through battery
Power Management Features
• Wide Battery Supply Range 3.0…5.5V
• On-Chip Bandgap Tuning for High Accuracy
(±1%)
• Current protection
• Thermal Protection with internal temperature
sensor
Audio
• 18 Bit Audio DAC (SNR 92dB) 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
• GND Buffer for Headphone Amplifier
• Line/ Headphone outputs with GND separation
• 16 Bit Audio ADC (SNR 82dB) with 16k Hz
sampling rate with input mux (LineIn or
Mic)
• Microphone Bias Supply and Amplifier
(mono)
• 5 Band Adjustable Audio Equalizer (+/-
12dB in 3dB gain steps)
• SPDIF Output
• Audio Mixer and Gain Stages
Real Time Clock (RTC)
• Alarm and Time function
• Repeated Wakeup (every second 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 HDI boards)
3 Applications
- PDA, PMP, GPS-Navigation Systems
- 1 Cell Li+ or 3 Cell NiMH powered devices
Flexible Power and Audio Management Unit
D
emoboard
AN3658
PRELIMINARY APPLICAT
ION NOTE
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Application Note AN3658 austriamicrosystems
Revision 1.0, Preliminary Page 2 of 20
Table of Contents
OTHER APPLICABLE DOCUMENTS AND PAPERS 3
Further Applications 3
REVISION STATUS 3
Demo kit contents 3
GENERAL DESCRIPTION 3
Getting started 4
AS3658 Demo Software Installation 4
Connecting the Demoboard and USB Box with the PC 4
Using the demo software 6
Start working with AS3658 7
Standard settings for starting up with the battery 7
Settings for starting up with a Charger connected 7
Default settings of the AS3658 7
APPLICATION CASES 7
Regulators 7
Backlight 7
Stand by mode 9
Source board 9
Touch panel 10
CONNECTORS AND JUMPERS 11
APPLICATION SCHEMATIC 14
AS3658 DEMOBOARD STACKUP 15
AS3658 demoboard: Layout (top view) 15
AS3658 Demoboard: Layout (bottom view) 16
AS3658 demoboard: Layout (Inner1 layer) 16
AS3658 Demoboard: Layout (Inner2 layer) 17
AS3658 demoboard: Layout (PWR layer) 18
AS3658 Demoboard: Layout (GND layer) 18
ORDERING INFORMATION 20
COPYRIGHT 20
CONTACT INFO 20
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Other applicable documents and papers
Data Sheet: AS3658 0V7
Further Applications
Applications based on the AS3658 are continuously updated. Visit our home-page:
http: //www.austriamicrosystems.com
Revision status
AS3658 Datasheet Rev.: 0v7
AN3658 Application note (this document): Rev.: 1v1
AS3658 Demoboard schematic: Rev.: A04
AS3658 Demoboard layout Rev.: A04
AS3658 Software version Rev.: 1v4
Demo kit contents
The available demo-kit AS3658 contains the following parts:
- AS3658 Power and Audio Management Demoboard “ready-to-go”
- USB-Interface Box for Windows Software control
- USB Interface Cable
General description
Remark: all subsequent component numbering refers to the application schematics, shown in pt. Application Schematic.
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Getting started
AS3658 Demo Software Installation
Start the demo software Installation Shield with “Install Demo Software”.
Specify the installation folder.
The Install Shield will guide you through the rest of the installation.
Connecting the Demoboard and USB Box with the PC
After the successful installation of the demo software, the USB Box can be connected to the PC and to the demoboard as shown
in the below picture.
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Starting the AS3658 demo software
The correct installed demo software can be started from
Start > Programs > austriamicrosystems AG > AS3658 Demosoftware.
USB connection and ASIC status are immediately indicated in the status bar of the demo software.
Connec
tor to
the PC
C
ON2
Battery
connection
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Using the demo software
The different Register settings are controlled through the GUI from the Demosoftware. Additional you can open the Register
Table with the button Register. In the register Table the register content on the Demobard can be chaged Bit by Bit or by Byte.
The GUI settings are periodically updated by activating the ‘register polling’ checkbox.
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Start working with AS3658
Standard settings for starting up with the battery
The AS3658 demokit contains a Li-Ion battery, which should be charged to min. 3.6V, which is of course enough to start up the
device.
1. Connect the Li-Ion battery to the BU5 and BU6 on the AS3658 demo board, which means Vbat+ with the red connector
of the battery and Vbat- with the black connector of the battery.
2. The AS3658 will now start up, depending on the boot rom bank which is selected by the Rprogramm resistor. To find
which bank is selected, check the boot rom header in the left corner of the demonstration board. There all available 8
banks can be selected with a jumper setting beside the according resistor value.
Note: for the revision AS3658 3v2 all banks require an XON press to activate the start up.
3. The LED D38 shows if the start up was successful (controlled by XRESET). Therefore J60 has to be closed.
Settings for starting up with a Charger connected
The AS3658 starts up immediately when having a charger connected.
For the USB Charger, connect 5V to BU4 and BU7,
For the linear charger connect 5V - 6V to BU1 and BU2 and check that J3 is closed and J13 is in position 1/2.
For the step down charger a voltage in the range of 5-15V can be connected again to BU1 and BU2. The J3 has to be open and
J13 set to position 2/3. If the input voltage of the Step down charger increases to 50V, the cascade NMOS transistors (Q3, Q4,
Q5 in the schematic) have to be activated, by removing R60, R61 and R62.
Default settings of the AS3658
The start sequence, enabling of single regulators and the voltage level of the regulators is defined by the boot rom.
Furthermore, more general configuration will be done as well, such as charger settings (charging currents, levels, etc.).
There are 8 banks available, while 1 is for test purpose only, which are in total 7 customer specific sequences.
For more information, please refer to the boot sequence sheet for the according chip revision.
Application cases
Within this chapter, general and often used application cases are introduced. It contains the hardware settings on the AS3658
demo board and the software settings in the demo software as well.
Regulators
The AS3658 demo board provides measurement points where the output voltage of all regulators can be measured. In the layout
the measurement points are close to the output capacitor of the regulators to ensure a high performance. Therefore please refer
to the “jumpers and connectors” chapter to find out the reference of each measurement point.
In the demonstration software, the regulators can be configured in the sheet “Regulators”.
As an example use the state file “regulators_on” to configure the regulators. File -> Load -> *.crf
Backlight
The DCDC step up2 of the AS3658 is dedicated to supply backlight LEDs. On the demo board 3 LED strings can be found which
are connected between the output of the DCDC Step up2 and the three DCDC current sinks (DCDC_CURR1, DCDC_CURR2 and
DCDC_CURR3).
Note: before switching on the DCDC Step up, the feedback of the DCDC Step up has to be configured in hardware and software.
To activate the settings for backlight, load the state file “backlight.crf” into the demonstration software.
With this state file, the DCDC step up2 is configured in the current feedback mode.
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Revision 1.0, Preliminary Page 8 of 20
Start up and Stand by mode
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Stand by mode
During the stand by mode of the AS3658, regulators can be enabled individually and current consumption will be reduced.
At least one regulator has to be active otherwise the AS3658 will go into the power off mode. If xon_enable=1, the start up can
be triggered by pressing XON.
For activating the stand by mode, go to sheet “Ctrl Itnerfaces” in the demo software, and press “Standby mode on”.
On the same sheet, the AS3658 can be set to power off mode. After enabling XON( XON Input Enable), press “Power OFF”.
Source board
The I2S bitstream board is supplied with the AS3658 demokit. It runs with a MMC or SD card. Connect it to J1 on the AS3658
demo board. The settings which are needed to run it, are stored within the “sourceboard.crf” file.
Connect earphones to headphone1 to listen to music. Volume settings can be done in sheet “audio”.
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Touch panel
The AS3658 contains a touchpanel which fits to the J6 on the demo board. To operate the touch panel with the AS3658 follow
the instructions below:
Bit name Config I2C command Comment
Audio_ldo_on 1b
write 4Ah,10h (00010000) // AudioSet1
Tp_on 1b
write 70h,3Fh (00111111) // tpen_control1
Tp_convint 11b
write 70h,3Fh (00111111) // tpen_control1
10ms
Tpen_soc 0b
write 70h,3Fh (00111111) // tpen_control1
Tpen_avg 11b
write 70h,3Fh (00111111) // tpen_control1
16 measurements
Tpen_pu __ Depends on
tpen_currpress
Tpen_currpress 1b
write 71h,28h (00101000) // pten_control2 [400 uA]
400uA
Tpen_wait 0b
write 71h,28h (00101000) // pten_control2 [400 uA]
Tpen_soc_pd 0b
write 71h,28h (00101000) // pten_control2 [400 uA]
Tpen_sample 01b;10b
write 72h,05h (00000101) // tpen_control3 [Sample
Time = 10 us]
Depends on capacity
of touchpanel
Tpen_debounce 1b
write 72h,05h (00000101) // tpen_control3
3msec
Tpen_timeout 0b
write 72h,05h (00000101) // tpen_control3
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Connectors and Jumpers
Listed below are the various connectors and jumpers.
Jumper
Function
Description
BU1 Vcharger Charger input
BU2 VSS Main Ground
BU3 Vsupply Regulated output voltage of Step down or linear Charger
BU4 VUSB Charger input
BU5 VBAT+ Positive battery voltage
BU6 VBAT- Battery ground
BU7 VSS Main Ground
J1 Connect Sourceboard
Connect Source board for I2S input source
J2 SPDIF OUT
SPDIF output
J3
Short when using linear
charger
Connecting this jumper shorts the coil L1
J4 Connect ground to HP1
For using ground cancellation set jumper in position 2/3,
otherwise pos.1/2 (if not using HP_CM_PWR)
J5 Connect ground to Line out
For using the ground cancellation set jumper in position
2/3 otherwise position 1/2
J6 Touchpanel Interface
Connect Touchpanel Interface
J7 Connect I2S
I2S input pins on one pinhead
J8 Connect ground to HP2
For using ground cancellation set jumper in position 2/3,
otherwise pos.1/2 (if not using HP_CM_PWR)
J12 ground cancellation
When using the ground cancellation, open J12
J13 Select Charger 1
J15 Testpoint SD3
Step down 3 output
J16 Testpoint SD2
Step down 2 output
J17 Testpoint SD1
Step down 1 output
J18 Connect USB Box
Connection of the USB Interface Box
J19 Testpoint VCP
Charge pump voltage
J20
Set supply voltage for
VCURR
Jumper in pos. 1/2 – charge pump output
Jumper in pos. 2/3 – Vsupply
J21 Testpoint VDIG4
DIG4 LDO output
J22 Testpoint VDIG3
DIG3 LDO output
J23 Testpoint VDIG2
DIG2 LDO output
J24 Testpoint VDIG1
DIG1 LDO output
Jumper
Function Description
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J25 Testpoint VRF3
RF3 LDO output
J26 Testpoint VRF2
RF2 LDO output
J27 Testpoint VRF1
RF1 LDO output
J28 Rprogramm = open
Set BOOT ROM
J29 Rprogramm = 320k
Set BOOT ROM
J30 Rprogramm = 160k
Set BOOT ROM
J31 Rprogramm = 80k
Set BOOT ROM
J32 Rprogramm = 40k
Set BOOT ROM
J33 Rprogramm = 20k
Set BOOT ROM
J34 Rprogramm = 10k
Set BOOT ROM
J35 Rprogramm = 0
Set BOOT ROM
J36 Measurement adapter
Pinhead for direct connection to the BGA
J37 Testpoint VSTPout1
Step up1 output
J38 Testpoint VSTPout2
Step up2 output
J39 Connect supply for SPDIF
When connecting jumper, Vcharge pump is used for
suppling SPDIF
J40 Connect backup battery
When connecting the jumper, 10mF are connected to
VBACK
J41 VSS_AUDIO
AUDIO Ground pinhead
J42 VSS_POWER
POWER Ground pinhead
J60 active
Close to activate the status LED which is controlled by the
XRESET signal and indicates a successful start up of the
AS3658.
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Revision 1.0, Preliminary Page 13 of 20
Connector and Jumper locations
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Application Note AN3658
austriamicrosystems
Revision 1.0, Preliminary Page 14 of 20
Application Schematic
J51
1
J55
1
VDIG_3
VSS pins for I2S
J45
1
J44
1
BU3
VSUPPLY
J46
1
J47
1
C27
1uF
J52
1
J48
1
BU7
VSS
J49
1
Vsupply
VCHAR GER
VOFF_B
VGATE
Vsupply
VDI G_2
Vsupply
V_USB
VBAT+
CURR2
R39
n.c .
SCL
D19
n.c .
D20
n.c .
D21
n.c.
CURR1
CURR3
VDIG_1
VSD3
R40 0R
C43
2.2uF
C56
1uF
J23
VDIG2
1
C51
1uF
startup control by external uC (see application note)
C49
1uF
J21
VDIG4
1
C52
1uF
J24
VDI G1
1
C50
1uF
J22
VDI G3
1
R24
220k
XR ESET
XINT
R37
220k
Vsupply
SDA
C54
2.2uF
J26
VFR _2
1
LX1
Q11
BSS138
FB1
SCL
R30
5k
R33
5k
AVDD
J18
USB_BOX
12
34
56
78
910
1112
1314
1516
ADC_IN2
VBACK
ADC_IN1
C57
1uF
J41
VSS_AUDI O
1
2
3
4
J42
VSS_POWER
1
2
3
4
Vsupply
ALVDD
Vsupply
HP_CM
LX2
Vsupply
R38 0R
BU1
VCHARGER
C39
2.2uF
V_USB
VSS
HP_CM_PWR
BU2
VSS
C18
10uF
BU4
VUSB
VREF
FB2
VCHARGER_in
Vsupply
LINE_CM
C17
1uF
RPROGRAMM
LX3
J31 Jumper2
LOUT_L
J33 Jumper2
J32 Jumper2
J35 Jumper2
J34 Jumper2
R48 80k
R50 40k
J30 Jumper2 R 47 160k
R51 20k
R52 10k
J29 Jumper2
FB3
R45 320k
J28 Jumper2
J6
Interface Touchscreen Panel
1
1
2
2
3
3
4
4
5
5
6
6
LOUT_R
Vsupply
C59
1uF
VCP_IN
HPL1
VRF1_IN
SDI1
DCDC_CURR1
CURR3
CURR2
DCDC_CURR2
CURR4
CURR1
DCDC_CURR3
VRF23_IN
HPR1
SDO1
VDIG34_IN
XON
S1
SCLK1
HPL2
VDI G2_IN
Vsupply
Vsupply
C29
10uF
VDAC
LRCLK1
SDO1
SDA
HPR2
Vsupply
SDI1
U9
LP2985IM5-2,5
VIN
1
GND
2
ON/OFF
3
BYPASS
4
VOUT
6
C76
1uF
SCLK1
C78
2.2uF
C77
100nF
R68
n.c.
VI2S
J1
I2S Interf ace to source board
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
MCLK1
LRCLK1
SCL
J59
n.c .
1
1
2
2
3
3
4
4
5
5
6
6
SDI2
R42 0R
XOU T32
Y1
32kHz
XI N32
Q32k
C55
2.2uF
SCLK2
Title
Size File N ame Rev
Date: Sheet of
Originator
Rev Description Name
A03
AS3658 ref erences, LDOs, interf aces
Custom
3 7Wednesday, November 21, 2007
ema
VRF _1
VCURR
C48
100nF
LRCLK2
J20
VCP_OUT
VRF _2
MCLK2
C36
1uF
R27
0R
MICP
VRF _3
VCP_OUT
U10
rechargable LiBat tery
.
1
.
2
VBACK
J40
VBACK
SDO3
SPDIF
VCP_OUT
C44
2.2uF
SCLK3
VBAT+
RPROGRAMM
LRCLK3
C58
1uF
LRCLK3
SPDIF
SCLK3
J60
en. ind.
Vsupply
GND_SW
Charger
Serial Interface
Control Interface
RTC
Internal Refs
Current sinks
General purpose
DCDC converter
1 and 2
Line regulators
Charge Pump
DCDC Step down
Audio
U7
AS3658
DCDC_GATE2
G2
DCDC_SENSE_N1
E2
DCDC_SENSE_P1
D1
DCDC_GATE1
F2
FB1
K4
PGND1
M1
LX1
L1
VSUPPLY _1
K1
VCURR_GPIO
P4
LX3
G1
XON
N4
VSUPPLY _4
E1
CURR4_GPIO4
L5
CURR3_GPIO3
N6
GND_SW
L8
XR ESET
F7
DCDC_SENSE_P2
G6
DCDC_SENSE_N2
G4
DCDC_FB1
H4
PGND2
H2
LX2
J1
VSUPPLY 2
K2
FB2
J7
FB3
H6
DCDC_CURR 1
L6
DCDC_FB2
J4
PGND3
H1
CURR1_GPIO1
N5
XI NT
F8
VSUPPLY 3
F1
CURR2_GPIO2
P6
DCDC_CURR 2
N7
VSS_CUR R_GPIO
P5
VRF _1
P10
VRF 1_IN
P9
VRF _2
N10
VSSA
P1
VSSA
P14
VSSA
A1
VSSA
G9
VSSA
H9
BAT_SW
J13
VSUP_USB
P7
V_USB
P8
VGATE
M2
VOFF_B
L2
VCHARGER
N11
VSS_CH
J2
VSUPPLY _5
N3
CH_SENSE_N
P3
CH_SENSE_P
P2
RPROGRAM
L9
V_BAT
M13
ADC_IN1
N8
GND_SENSE
L13
V2_5
N12
ISENSP
K14
ISENSN
K13
CREF
L10
RBIAS
L14
AGND
K11
VBAT_SW12
J14
VBAT_SW12
H13
VSUP_SW12
G14
VSUP_SW12
H14
VREF
J11
VSUPPLY_6
G13
LINE_CM
A12
HP_C M
B12
LINL
F14
LINR
E14
LOUT_R
A11
LOUT_L
B11
VDAC
F13
HPR1
C13
HP_CM_PWR
D14
HPL1
A13
AVDD
E13
ALVDD
D13
VDIG_1
B10
VDI G1_IN
A10
VDIG_2
B8
VDI G2_IN
B9
SDI 1
B4
LRC LK1
A2
SCLK1
B3
SCLK2
C2
LRC LK2
D10
SDI 2
B1
VI2S
A4
BVSS
A14
VCP_N
A6
VCP_P
A7
VCP_OUT
A8
VSS_CP
B6
VCP_IN
B7
SCL
D6
SDA
B5
Q32k
C1
XI N32
P13
XOUT32
N14
ADC_IN2
N9
VBACK
M14
DCDC_CURR 3
L7
VRF 23_IN
P11
VRF _3
P12
VDI G34_IN
A9
VDIG_3
D8
VDIG_4
D7
SDO1
A5
MCLK1
D9
MCLK2
D2
SDO3
D5
SCLK3
A3
LRC LK3
E4
SPDIF
F4
HPL2
C14
HPR2
B14
MICN
G11
MI CP
H11
MI CS
F11
PGATE1
N1
VSSA
J8
BVSS
E11
Vsupply
PGATE1
SDO3
J25
VFR_3
1
Vsupply
Vsupply
Vsupply
D38
R32
0R
XR ESET
C45
2.2uF
J19
VCP_OUT
1
C46
1uF
D24
BAT760
VDIG1_IN
R70
R_0603
C23
1uF
C53
2.2uF
J27
VFR _1
1
ISENSP
R65
4k7
R41 0R
C71
1uF
BU5
VBAT+
BU6
VBAT-
ISEN SN
Vsupply
BAT_SW
C30
1uF
C74
100nF
C75
100nF
R25
0R047
RBIAS
R64
4k7
C37
1uF
Q7
FD G642P
R16
0R
R29
220k
C38
100nF
V2_5
CREF
DCDC_SENSE_P2
DCDC_SENSE_N2
DCDC_GATE2
DCDC_F B2
DCDC_F B1
DCDC_GATE1
DCDC_SENSE_P1
DCDC_SENSE_N1
LINL
Vsupply
C47
470nF
XR ESET
VSS
Vsupply
LINR
C32
10uF
SDA
CH_SENSE_N
SCL
CH_SENSE_P
ISEN SN
ISEN SP
BAT_SW
MICS
VBAT+
indication LED: successfull start up AS3658
C22
1uF
MICN
VDIG_4
SDA
J53
1
J50
1
J54
1
ams AG
Technical content still valid
Application Note AN3658 austriamicrosystems
Revision 1.0, Preliminary Page 15 of 20
AS3658 demoboard stackup
AS3658 demoboard: Layout (top view)
demoboard: Layout (top view)
ams AG
Technical content still valid
Application Note AN3658 austriamicrosystems
Revision 1.0, Preliminary Page 16 of 20
AS3658 Demoboard: Layout (bottom view)
Layout (bottom view)
AS3658 demoboard: Layout (Inner1 layer)
ams AG
Technical content still valid
Application Note AN3658 austriamicrosystems
Revision 1.0, Preliminary Page 17 of 20
demoboard: Layout (In1 layer)
AS3658 Demoboard: Layout (Inner2 layer)
Layout (In2 layer)
ams AG
Technical content still valid
Application Note AN3658 austriamicrosystems
Revision 1.0, Preliminary Page 18 of 20
AS3658 demoboard: Layout (PWR layer)
demoboard: Layout (PWR layer)
AS3658 Demoboard: Layout (GND layer)
Layout (GND layer)
ams AG
Technical content still valid
Application Note AN3658 austriamicrosystems
Revision 1.0, Preliminary Page 19 of 20
ams AG
Technical content still valid
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AMS AS3658 is a highly integrated power and audio management unit that includes two RF Programmable Low Noise LDOs (250mA), one RF Programmable Low Noise LDO (400mA), four Programmable Digital Low Power LDOs (200mA), and two General Purpose PWM DC/DC step up converter with two programmable current sinks (e.g. for white led). Furthermore, it consists of three General Purpose high efficiency DC/DC step down converter, one Low noise charge pump with 5V output voltage, and one Ultra Low Power 2.5V LDO (always on).
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