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AS3710/11 AN01 – Demoboard
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Application Note: AN01 – Demoboard
AS3710/11
High Current Power Management Unit
Preliminary Application Note
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AS3710/11 AN01 – Demoboard
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Table of Contents
1 FURTHER APPLICATIONS ................................................................................................................... 3
2 REVISION STATUS .............................................................................................................................. 3
3 GETTING STARTED ............................................................................................................................. 3
4 HW - OVERVIEW:................................................................................................................................. 4
4.1 AS3710/11 Demoboard bill of material .......................................................................................................... 4
5 GUI – SW: OVERVIEW ......................................................................................................................... 7
5.1 Board Startup ................................................................................................................................................ 7
5.2 LDO ............................................................................................................................................................... 8
5.3 DCDC ............................................................................................................................................................ 9
5.4 BOOST ........................................................................................................................................................ 10
5.5 Charger ....................................................................................................................................................... 11
5.6 Housekeeping ............................................................................................................................................. 12
5.7 Housekeeping 2 .......................................................................................................................................... 13
5.8 OTP_Startup ............................................................................................................................................... 14
5.9 Startup Diagram .......................................................................................................................................... 15
5.10 Startup Sequence ....................................................................................................................................... 16
6 PCB LAYER STACKUP ...................................................................................................................... 17
7 DEMOBOARD SCHEMATIC ................................................................................................................ 18
8 DEMOBOARD LAYOUT ...................................................................................................................... 19
9 COPYRIGHT ...................................................................................................................................... 21
10 DISCLAIMER ..................................................................................................................................... 21
AS3610
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1 Further Applications
Visit our home-page: http: //www.austriamicrosystems.com
2 Revision status
AS3710/11 AN01 – Demoboard Rev.: 1V0
AS3710/11 Demoboard – Layout Rev.: 1V2
AS3710/11 Demoboard – Schematic Rev.: 1V2
3 Getting Started
Install the GUI SW which can be found on the USB-stick, which is included.
Follow the sequence to connect the AS3605 Board (as shown in the picture below):
1. Connect the austriamicrosystems USB-BOX
2. connect the battery to VBAT and GND
Figure 1: Shows AS3710/11 Eval Board with USB Box and battery
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4 HW - Overview:
4.1 AS3710/11 Demoboard bill of material
Listed below are the various jumpers, connectors and components.
Jumper
Connector
Function
Jumper
setting
Comment
J1 Supply for LDO7 & LDO8 Y Choose between VSUP and SD3
J2 Supply for LDO4, LDO5 & LDO6
Y Choose between VSUP and SD3
J3 BATTEMP Y Connect BATTEMP to 100k resistor
J4 ON LED Y Enabling status “ON” LED D4
J5 I2C interface connector for I2C interface
J6 Measurement pins Y Used for measuring and connecting socket adapter
J7 Measurement pins Y Used for measuring and connecting socket adapter
J8 Measurement pins Y Used for measuring and connecting socket adapter
J9 Measurement pins Y Used for measuring and connecting socket adapter
J10 GND GND connectors
J11 GND GND connectors
J12 GND GND connectors
J13 CURR3 Y Enabling D6 – D9 (can be used for current measurements)
J14 CURR2 Y Enabling D10 – D13 (can be used for current measurements)
J15 CURR1 Y Enabling D14 – D17 (can be used for current measurements)
J16 GPIO1 Y Enabling D18 (can be used for current measurements)
J17 GPIO2 Y Enabling D19 (can be used for current measurements)
J18 GPIO3 Y Enabling D20 (can be used for current measurements)
J19 GPIO4 (only AS3710) Y Enabling D21 (can be used for current measurements)
BU1 VUSB Positive supply of charger
BU2 GND GND connector of charger
BU3 VBAT Positive pole of battery
BU4 GND Negative pole of battery
U2 Mini USB connector Charger connector
S1 ON – switch
S2 RESET – switch
Component
Value
Comment
U1 AS3710/11 High Current Power Management Unit
C1 2.2uF/6.3V/X7R
output capacitor: LDO1
C2 1uF/6.3V/X7R
output capacitor: LDO8
C3 2.2uF/6.3V/X7R
output capacitor: LDO6
C4 2.2uF/6.3V/X7R
output capacitor: LDO5
C5 2.2uF/6.3V/X7R output capacitor: LDO4
C6 1uF/6.3V/X7R
output capacitor: LDO3
C7 2.2uF/6.3V/X7R output capacitor: LDO2
C8 1uF/6.3V/X7R output capacitor: LDO7
C9 2.2uF/6.3V/X7R input capacitor: LDO78
C10 2.2uF/6.3V/X7R input capacitor: LDO456
C11 2.2uF/6.3V/X7R input capacitor: LDO123
C12 2.2uF/6.3V/X7R input capacitor: VSUP_SD1
C13 4.7uF/25V/X7R input capacitor: CHGIN
C14 10uF/6.3V/X7R output capacitor: SD1
C15 4.7uF/25V/X7R input capacitor: VUSB
C16 2.2uF/6.3V/X7R input capacitor: VSUP_SD2
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C17 2.2uF/6.3V/X7R
input capacitor: VSUP_SU
C19 10uF/6.3V/X7R input capacitor: VSUP_CHG
C20 10uF/6.3V/X7R output capacitor: SD2
C21 2.2uF/6.3V/X7R input capacitor: VSUP_SD3
C22 2.2uF/6.3V/X7R input capacitor: SU1
C23 10uF/6.3V/X7R input capacitor: VBAT
C24 47uF/6.3V/X7R input capacitor: VSUP_CHG
C25 10uF/6.3V/X7R output capacitor: SD3
C26 15nF/50V/X7R FB capacitor: SU1
C27 10uF/25V/X7R output capacitor: SU1
C28 100nF/6.3V/X7R input capacitor: CREF
C29 1uF/6.3V/X7R output capacitor: V2_5
C30 33nF/50V/X7R FB capacitor: SU1
C31 2.2uF/6.3V/X7R input capacitor: SU2
C32 1.5nF/50V/X7R FB capacitor: SU2
C33 2.2uF/25V/X7R output capacitor: SU2
C34 15nF/50V/X7R FB capacitor: SU2
C35 2.2uF/6.3V/X7R (only AS3711) input capacitor: SD4
C36 33uF/6.3V/X7R (only AS3711) output capacitor: SD4
C37
2.2uF/6.3V/X7R (only AS3710) input capacitor: SU3
C38 2.2uF/25V/X7R (only AS3710) output capacitor: SU3
C39 1.5nF/50V/X7R (only AS3710) FB capacitor: SU3
C40 15nF/50V/X7R (only AS3710) FB capacitor: SU3
C41 2.2uF/6.3V/X7R input capacitor: VSUP_CHG
L1 1uH/1.6A SD1 coil (Murata_LQM2HPN1R0MG0L)
L2 1uH/1.6A SD2 coil (Murata_LQM2HPN1R0MG0L)
L3 1uH/1.6A Charger coil (Murata_LQM2HPN1R0MG0L)
L4 1uH/1.6A SD3 coil (Murata_LQM2HPN1R0MG0L)
L5 4.7uH/1.24A SU1 coil (TDK_VLCF4020T-4R7N1R2)
L6 10uH/0.85A SU2 coil (TDK_VLCF4020T-100MR85)
L6 10uH/0.85A SU2 coil (TDK_VLCF4020T-100MR85)
L7 1.5uH/2.8A (only AS3711) SU2 coil (Coilcraft_LPS4012-152MLB)
L8 10uH/0.85A (only AS3710) SU3 coil (TDK_VLCF4020T-100MR85)
R1 0R VSUP_SU
R2 0R SENSEP
R3 0R15
sense resistor for SU1
R5 100k
resistor for BATTEMP
R6 1M
FB resistor for SU1
R7 0R15
sense resistor for SU2
R8 330k
FB resistor for SU1
R9 330R
series resistor for D4
R10 0R SENSEN_SU1
R11 1M FB resistor for SU2
R12 0R (only AS3710)
FB_SU2
R13 0R (only AS3711)
LX_SD4
R14 100k
FB resistor for SU2
R15 10k
pull-up resistor for SDA
R16 1M
pull-up resistor for XRES
R17 10k pull-up resistor for SCLK
R18 0R
VSUP_GPIO
R19 0R033 (only AS3711)
sense resistor for SD4
R20 10R (only AS3711)
LX_SD4
R21 0R15 (only AS3710)
sense resistor for SU3
R22 1M (only AS3710)
FB resistor for SU3
R23 100k (only AS3710)
FB resistor for SU3
R24 0R SENSEN_SU2
R25 0R (only AS3710) SENSEN_SU3
R26 270R
series resistor for D18
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R27 270R
series resistor for D19
R28 270R
series resistor for D20
R29 270R (only AS3710) series resistor for D21
R30 0R XIN32
R31 0R XOUT32
R32 1M nm GATE_SU1
R33 1M nm GATE_SU2
R34 1M nm GATE_SU3 / NGATE_SD4
D1 Schottky
Charger (NXP_PMEG4010BEA)
D2 Schottky
SU1 (NXP_PMEG4010BEA)
D3 Schottky
SU2 (NXP_PMEG4010BEA)
D4 LED – green “ON” – LED (Avago Technologies_HSME-C170)
D5 Schottky (only AS3710)
SU3 (NXP_PMEG4010BEA)
D6 LED – white
CURR3 (Avago Technologies _HSMW-C191)
D7 LED – white
CURR3 (Avago Technologies _HSMW-C191)
D8 LED – white
CURR3 (Avago Technologies _HSMW-C191)
D9 LED – white
CURR3 (Avago Technologies _HSMW-C191)
D10 LED – white
CURR2 (Avago Technologies _HSMW-C191)
D11 LED – white
CURR2 (Avago Technologies _HSMW-C191)
D12 LED – white
CURR2 (Avago Technologies _HSMW-C191)
D13 LED – white
CURR2 (Avago Technologies _HSMW-C191)
D14 LED – white
CURR1 (Avago Technologies _HSMW-C191)
D15 LED – white
CURR1 (Avago Technologies _HSMW-C191)
D16 LED – white
CURR1 (Avago Technologies _HSMW-C191)
D17 LED – white
CURR1 (Avago Technologies _HSMW-C191)
D18 LED – white
GPIO1 (Avago Technologies _HSMW-C191)
D19 LED – white GPIO2 (Avago Technologies _HSMW-C191)
D20 LED – white
GPIO3 (Avago Technologies _HSMW-C191)
D21 LED – white (only AS3710)
GPIO4 (Avago Technologies _HSMW-C191)
D22
Zener SU2 (Multicomp_ 1SMA4751)
D23 Zener SU2 (Multicomp_ 1SMA4751)
Q1 SI2306
CHGIN (Vishay_SI2306BDS-T1-E3)
Q2 FDC642P
EXTBATSW (Fairchild_ FDC642P)
Q3 SI1304
SU1 (Vishay_SI1304BDL-T1-E3)
Q4 SI1304
SU2 (Vishay_SI1304BDL-T1-E3)
Q5 SI1304
„ON“ – LED switch (Vishay_SI1304BDL-T1-E3)
Q6 FDC6420C (only AS3711)
SD4 (Fairchild_ FDC6420C)
Q7 SI1304 (only AS3710)
SU1 (Vishay_SI1304BDL-T1-E3)
Q8 NTHD3102CT1G (only AS3711)
nm
SD4 (ON Semiconductor_ NTHD3102CT1G)
Q9 FDMA1072P nm
SD4 (Fairchild_ FDMA1072P)
Q10 FDMA1024NZ nm
SD4 (Fairchild_ FDMA1024NZ)
Y1 32.768kHz crystal CC4V-T1A
ams AG
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AS3710/11 AN01 – Demoboard
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Figure2: Connector and Jumper locations of AS3710/11 Evalboard
5 GUI – SW: Overview
5.1 Board Startup
Check battery first if it is loaded!
Connect Battery (~3.7V Lithium Ion) between VBAT and GND
Connect USB Box with the AS3710/11 Eval Board at J5
If the AS3710/11 Eval Board is supplied and connected correctly to the USB-Box, the field at the right
bottom corner of the GUI will become green and shows the following words,
if the AS3710 chip is mounted on the PCB:
if the AS3711 chip is mounted on the PCB:
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5.2 LDO
LDO 1 & LDO 2 (Analog regulators):
− switching ON/OFF
− adjustable Vout range from 1.2V to 1.95V in 50mV steps and from 1.8V to 3.3V in 100mV steps
− choosing of current limitation between 150mA and 250mA
− on/off control via GPIO1, GPIO2 or GPIO3
LDO 3 to LDO 8 (Digital regulators):
− switching ON/OFF
− adjustable Vout range from 0.9V to 3.3V in 50mV steps
− choosing of current limitation between 150mA and 300mA
− on/off control via GPIO1, GPIO2 or GPIO3
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5.3 DCDC
DCDC Stepdown converters:
− switching ON/OFF
− adjustable Vout range from 0.6125V to 1.4V in 12.5mV steps
and from 1.4V to 2.6V in 25mV steps
and from 2.6V to 3.3V in 50mV steps
− choosing of SD frequency between 2MHz, 3MHz and 4MHz
− selection of fast regulation mode in case of large load changes
− selection of low noise mode
− on/off control via GPIO1, GPIO2 or GPIO3
− “low voltage” bit is set, when Vout drops below the low voltage
threshold (5%)
SD4 is active when
the AS3711 chip is
connected to the GUI
DVM (Dynamic Voltage Management):
− apply DVM either to SD1, or to SD2
or to SD3 (or to SD4 in case of AS3711)
at the same time
− choosing of time delay between voltage
steps when DVM is applied
SD2 + SD3 Mode:
− combination of SD2 + SD3
− SD2: Master / SD3: Slave
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5.4 BOOST
DCDC
Step Up 1 converter:
− switching ON/OFF
− setting the SU1 frequency either to 1MHz or to 500kHz
− choosing the gain selection of SU1
~ single resistor (schematic: only R6 and C26 is used)
~ resistor divider (schematic: R6, C26 and R8, C30 is used)
− defining the tuning current at FB_SU1 pin from 0uA to 31uA in 1uA steps
− enabling/disabling load detection and short protection
− “detection (status)” bit goes high, when SU1 detects a load current (see register 53h)
− “over-current (status)” bit goes high, when SU1 detects a short circuit (see register 53h)
− enabling/disabling an overcurrent timeout of 5ms to disconnect the output with an external transistor controlled by GPIO2 or GPIO3
DCDC Step Up 2 converter:
− switching ON/OFF (→ see green window)
− setting the SU1 frequency either to 1MHz or to 500kHz
− choosing the gain selection of SU2
~ single resistor (schematic: only R11 and C32 is used)
~ resistor divider (schematic: R11, C32 and R14, C34 is used)
− defining the tuning current at FB_SU2 pin from 0uA to 31uA in 1uA steps
− selection of Regulation Mode: voltage regulation via FB_SU2 or current regulation via CURR1, CURR2 or CURR3
− selection of voltage regulation either via FB_SU2 or GPIO2 or GPIO3 or GPIO4
− enable/disable PWM mode
− possibility to invert the input clock for SU1 and SU2
− setting the low frequency PWM operation, if PWM frequency is < 20kHz
− disable over-voltage protection
DCDC Step Up 3 converter (only AS3710):
− switching ON/OFF
− setting the SU3 frequency either to 1MHz or to 500kHz
− choosing the gain selection of SU3
~ single resistor (schematic: only R22 and C39 is used)
~ resistor divider (schematic: R22, C39 and R23, C40 is used)
− defining the tuning current at FB_SU3 pin from 0uA to 31uA in 1uA steps
−
this window appears when switching ON SU2
Current Sinks
:
− adjustable current from 0mA to 40mA in 0.16mA steps
− ON/OFF control of CURR1, CURR2 and CURR3 see register 40h
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5.5 Charger
Charger Control:
− Charging enable / disable
− USB Current Limiter enable / disable
− no battery detection enable / disable
− choosing between linear charger mode and DCDC
Step down charger mode
− selection of USB current limit from 94mA to 2.53A
− Auto Resume mode enable / disable
NTC Supervision
:
− switching ON/OFF
− NTC temperature selection (50°C or 45°C)
− NTC type selection (100k or 10k)
Charger Status
:
− indicates
~ a charger detection
~ constant current mode
~ auto resume mode
~ trickle current mode
~ constant voltage mode
~ End Of Charging
~ no battery detection
~ battery temperature HIGH
~ Over Voltage Protection active
~ closed battery switch
Charger Voltage Control:
− setting the End Of Charge voltage
− setting the Charger Voltage Resume
− setting of VSUP voltage, which supplies the charger and the system
− setting of minimum VSUP voltage, if overall current consumption
exceeds USB current limit
Charger Current Control:
− setting the charging current limit in Constant Current mode
− setting the range of the constant current
→ normal mode goes from 750mA to 1500mA
→ low current mode goes from 250mA to 1000mA
− setting the charging current limit in Trickle Current mode
− setting the EOC current to Trickle current or ½ of Trickle current
Charger Supervision
:
− Over Voltage Protection enable / disable
− setting the charging timeout timer
− selection of die temperature regulating the charging
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5.6 Housekeeping
GPIOs
:
− setting GPIOs to normal or inverted mode
− choosing one out of 16 GPIO special functions
− choosing one out of 8 GPIO modes
− setting GPIO to high, if it´s used as OUTPUT or IO
− detecting a GPIO high level, if it´s used as INPUT
FYI: when using the AS3711 EB
→ GPIO4 is used as FB pin for SU2 !!!
RTC:
− switching ON/OFF 32kHz
RTC oscillator
− enabling RTC alarm wakeup
in Power OFF mode
− enabling RTC repeated
wakeup in Power OFF mode
− generation of IRQs every
sec, or min, or 2min or 8min
− setting the start-time
− setting the alarm-time
− reading out the alarm-time
ADC10 Settings
:
− ADC concersion frequency (250kHz or 62.5kHz)
− automatic update (conversion interval 1s, 2s or 5s)
− setting the measurement range for
GPIO/LX_SD4/SENSEN_SU1 to max 1.8V (→ low)
Stand_by / Voltage Control per GPIO:
− setting Stand-by and/or Vselect by GPIO1
and/or GPIO2 and/or GPIO3
− regulator selection, which get controlled
− voltage selection of adjusted regulator
− setting of “sd_freq” if SDx is choosen
− setting of “ldo_on” and “ldo_limit”, if LDOx is
choosen
− enable SDx and LDOx in stand-by mode
− setting stand-by delay
− disable Reset signal during stand-by
− Stand-by button
ADC10:
− starting ADC
conversation
− measuring several
parameters inside
the chip
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5.7 Housekeeping 2
Interrupt:
− setting, which event should cause an
interrupt
− detection, which event causes an interrupt
PWM:
− setting of PWM low time and PWM high time from
1us * PWM pre-divider to 256us * PWM pre-divider
− setting PWM pre-divider to 1, 2, 4 or 16
Watch dog:
− set the WD ON
− if WD reset ON is activated, a RESET will start, if the WD expires
− setting of WD min time from 0ms to 1.9s and WD max time from 7.5ms to 1.9s
Reset / Power Off
:
− selection of Reset threshold when VBAT decreases
→ “Reset Voltage Fall”
− setting of RESET delay after startup of the last regulator
− enable RESET with ON key press for 4s/8s
− enable Power Off at low VBAT
− disable Supply Reset: sets a RESET if VSUP < 2.7V
− enable Supply Reset: sets a RESET if VSUP < “Reset Voltage Fall”
− disable Fast Reset: sets debounce time to 3ms
− enable Fast Reset: sets debounce time to 4us
− “Force Reset” and “Power Off” button
− detection of RESET reason
Internal References:
− selection of internal CLK frequency
− enable Low Power mode
→ Iq reduced by ~45uA
Temperature Supervision
:
− enabling Temperature Supervision
− detection if 140°C threshold has
been reached
→ has to be reset with the “Reset
Overtemp 140” button
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5.8 OTP_Startup
Timeslots:
− 11 timeslots
− possible regulator and corresponding output voltage selection
in every timeslot:
~ SDx (voltage & frequency selection see chapter 5.3)
~ LDOx (voltage & current limiter selection see chapter 5.2)
~ GPIOx (GPIO settings see chapter 5.6)
− every timeslot has the possibility of a delayed start up with
respect to the previous timeslot
− every regulator can be controlled via GPIO1, GPIO2
General Settings:
− selection of delay interval (no delay, 1ms or 4ms)
− after the last timeslot a reset signal is generated after a chosen Reset time (10ms, 50ms, 100ms or 150ms)
− selection of Reset threshold when VBAT increases → “Reset Voltage Rise”
− choosing of SD frequency between 2/3MHz or 3/4MHz
− selection of fast regulation (see chapter 5.3 “DCDC”)
− combination of SD2 (Master) + SD3 (Slave)
− enabling of “SD4 slow FET” feature, when using an external FET with long rise and fall times for SD4
− exit of Power off mode, if charger insertion is detected → rising edge detection or level detection
− choosing between linear charger and DCDC charger
− SUP reset en: see enable Supply Reset in chapter 5.7
− CHG pwr off en: Exit of Power Off mode, if charger is detected → either level (“0”) or rising edge (“1”) detection
− pwr_off vsuplow: if low battery is detected → Vbat monitored and chip startup when Vbat > ResVoltRise (“0”) or Power off mode (“1”)
− setting GPIO1 and GPIO2 to input
− on_reset Delay 4s or 8s and onkey_reset enable: see Reset/Power off in chapter 5.7
− Unique ID
− automatic Power off mode directly after startup (battery or charger insertion)
− selection of USB current limit from 94mA to 2.53A
− selection of chip ID for saving a new sequence
−
Default button to
set the bits to their default value
OTP:
− loading of existing OTP startup
sequence
− saving OTP startup sequence as a .txt
file
− reading the OTP registers of the chip
− writing into the OTP registers of the chip
− testing the startup just from the OTP
− burning the startup sequence by fusing
the trim registers
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5.9 Startup Diagram
The Startup Diagram shows, how the regulators will startup under the adjusted conditions in the OTP_Startup tab
(see chapter 5.8). In this case, the 1
st
regulator (e.g. SD1) starts at time “0” followed by the 2
nd
timeslot with an
additional optional delay of 1ms, followed by the 3
rd
timeslot and so on.
In chapter 5.8 every timeslot has a delay (e.g. 1ms → marked green) with respect to the previous one.
The reset signal appears with a delay (e.g. 10ms → marked green) after the last timeslot.
showing regulator of each timeslot
f
ield to give an individual name, e.g. Reg1 → is shown in the startup sequence .txt file
showing the adjusted parameters of the
regulator of each timeslot
1
ms delay
interval
10ms reset time
resets the field for giving an individual name
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5.10 Startup Sequence
The following picture shows the .txt file of a startup sequence saved with the button
“SAVE_OTP_STARTUP_SEQUENCE”.
showing the individual name, given in
the field in the Startup Diagram tab
remaining timeslots will be
filled up with the same
entries like the last regulator
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6 PCB Layer Stackup
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7 Demoboard Schematic
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8 Demoboard Layout
Layout (top view)
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