AMS AS3605 User guide

Brand: AMS

Model: AS3605

Type: User guide

AMS AS3605 is a compact, programmable multi-standard power management unit (PMU) for mobile audio applications. It is a highly integrated device which combines a DCDC step-down buck converter, a charge pump with 4 low drop-out (LDO) regulators and a flexible power management unit (PMU) and battery charger. The PMU includes a 4-channel, 10-bit SAR ADC and a 2-channel, 16-bit DAC for monitoring and controlling all voltage supplies, currents and temperatures on the device. AMS AS3605 is designed for systems with demanding power requirements and features i.a. following capabilities:

generation of multiple power rails from one or two Li-Ion or Li-Polymer batteries

generation of multiple power rails from one or two Li-Ion or Li-Polymer batteries

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Headquarters:

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Tel: +43 (0) 3136 500 0

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AS3605 AN01 – Demoboard

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Application Note: AN01 – Demoboard

AS3605

Multi-Standard Power Management Unit

Preliminary Application Note

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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 AS3605 Demoboard bill of material ............................................................................................................... 4

5 GUI – SW: OVERVIEW ......................................................................................................................... 6

5.1 Board Startup ................................................................................................................................................ 6

5.2 PMU .............................................................................................................................................................. 7

5.3 Charger ......................................................................................................................................................... 8

5.4 Housekeeping ............................................................................................................................................... 9

5.5 Audio ........................................................................................................................................................... 10

5.6 OTP_Startup ............................................................................................................................................... 11

5.7 Startup Diagram .......................................................................................................................................... 12

5.8 Startup Sequence........................................................................................................................................ 13

6 PCB LAYER STACKUP ...................................................................................................................... 13

7 DEMOBOARD SCHEMATIC ................................................................................................................ 14

8 DEMOBOARD LAYOUT ...................................................................................................................... 15

9 COPYRIGHT ...................................................................................................................................... 16

10 DISCLAIMER ..................................................................................................................................... 16

AS3610

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1 Further Applications

Visit our home-page: http://www.austriamicrosystems.com

2 Revision status

AS3605 AN01 – Demoboard Rev.: 1V1

AS3605 Demoboard – Layout Rev.: 1V1

AS3605 Demoboard – Schematic Rev.: 1V1

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 AS3605 with USB Box and battery

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4 HW - Overview:

4.1 AS3605 Demoboard bill of material

Listed below are the various jumpers, connectors and components.

Jumper

Connector

Function

Jumper

setting

Comment

J1 Supply for CURR1 – CURR5 Y Choose between V5_6 and VBAT

J2 USB – I²C interface Used for connecting austriamicrosystems USB-Box

J3 GPIO3 Y Enabling LED D6 (can be used for current measurements)

J4 GPIO1 Y Enabling LED D7 (can be used for current measurements)

J5 GPIO2 Y Enabling LED D8 (can be used for current measurements)

J6 CURR1 Y Enabling LED D1 (can be used for current measurements)

J7 CURR2 Y Enabling LED D2 (can be used for current measurements)

J8 CURR5 Y Enabling LED D3 (can be used for current measurements)

J9 CURR4 Y Enabling LED D4 (can be used for current measurements)

J10 CURR3 Y Enabling LED D5 (can be used for current measurements)

J11 Supply for VBAT_3 Y Connect to VBAT (can be used for current measurements)

J12 Supply for VBAT_4 Y Connect to VBAT (can be used for current measurements)

J13 External transistor Y Enabling Q1 (can be used for current measurements)

J14 Supply for VBAT_2 Y Connect to VBAT (can be used for current measurements)

J15 DCDC coil Y Enabling L1 (can be used for current measurements)

J16 Supply for VBAT_1 Y Connect to VBAT (can be used for current measurements)

J17 VANA_1 Y Enabling status “ON” LED D10

J18 Audio Stereo/Mono Y Choose between Stereo and Mono

J25 Measurement pins Used for measuring and connecting socket adapter

J27 Measurement pins Used for measuring and connecting socket adapter

J28 Measurement pins Used for measuring and connecting socket adapter

J31 Measurement pins Used for measuring and connecting socket adapter

J35 GND

J36 GND

J37 GND

BU1 VCHARGE Positive supply of charger

BU2 GND GND connector of charger

BU3 VBAT Positive pole of battery

BU4 GND_SENSE Negative pole of battery

U2 Mini USB connector Charger connector

U3 Audio – IN connector

U4 Audio – OUT connector

S1 ON – switch

S2 RESET – switch

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Component

Value

Comment

U1 AS3605 Multi-Standard Power Management Unit

C1 470nF/6.3V/X7R charge pump capacitor

C2 1uF/6.3V/X7R

output capacitor: V5_6

C3 1uF/6.3V/X7R input capacitor: VBAT_3

C4 10uF/10V/X7R input capacitor: VCHARGE

C5 1uF/6.3V/X7R input capacitor: VBAT_4

C6 1uF/6.3V/X7R

output capacitor: VREF_1

C7 1uF/6.3V/X7R output capacitor: VREF_2

C8 1uF/6.3V/X7R output capacitor: VREF_3

C9 1uF/6.3V/X7R output capacitor: VREF_4

C10 1uF/6.3V/X7R

output capacitor: V2_5

C11 100nF/6.3V/X7R output capacitor: VSIM

C12 10uF/10V/X7R output capacitor: VBUCK

C13 1uF/6.3V/X7R input capacitor: VBAT_2

C14 100nF/16V/X7R input capacitor: AGND

C15 100uF/6.3V/X7R input capacitor: VBAT (Kemet_T491D107K016AT)

C16 10uF/16V/X7R input capacitor: VBAT

C17 1uF/6.3V/X7R

output capacitor: VANA_2

C18 1uF/6.3V/X7R

output capacitor: VANA_1

C19 100nF/6.3V/X7R output capacitor: CREF

C20 1uF/6.3V/X7R input capacitor: VBAT_1

C21 100nF/6.3V/X7R input capacitor: AIN_L

C22 100nF/6.3V/X7R input capacitor: AIN_R

C23 100uF/16V/X7R output capacitor: AOUT_L (Kemet_T491D107K016AT)

C24 100uF/16V/X7R output capacitor: AOUT_R (Kemet_T491D107K016AT)

L1 2.2uH/1.4A DCDC buck coil (TDK_VLF3012ST)

R1 10k pull – up for SCLK

R2 10k pull – up for SDA

R3 10k pull – up for XRES

R4 10k

pull – up for GPIO1

R5 10k

pull – up for GPIO2

R6 10k

pull – up for GPIO3

R7 270R

series resistor for D6

R8 270R

series resistor for D7

R9 270R

series resistor for D8

R10 10k (not mounted) discharging resistor between VCHARGE and VGATE

R11 200m

sense resistor (Vishay Dale_WSL0805R1000FEB)

R12 0R parallel to J15

R13 1k

series resistor for D10

D1 LED – white

CURR1 (Avago Technologies_HSMD-C170)

D2 LED – white CURR2 (Avago Technologies _HSMD-C170)

D3 LED – white

CURR5 (Avago Technologies _HSMD-C170)

D4 LED – white

CURR4 (Avago Technologies _HSMD-C170)

D5 LED – white CURR3 (Avago Technologies _HSMD-C170)

D6 LED – white

GPIO3 (Avago Technologies _HSMD-C170)

D7 LED – white

GPIO1 (Avago Technologies _HSMD-C170)

D8 LED – white

GPIO2 (Avago Technologies _HSMD-C170)

D9 Schottky

charger (ON Semiconductor_MBR0520LT1G)

D10 LED – white

Status “ON” (Avago Technologies _HSMD-C170)

Q1 PBSS301 PNP

external transistor (NXP_ PBSS301PD)

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Figure2: Connector and Jumper locations of AS3605 Demoboard

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_SENSE

 Connect USB Box with the AS3605 Eval Board at J2

 If the AS3605 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:

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5.2 PMU

LDO Box:

− switching ON/OFF

− adjustable Vout range of RF- and Analog-LDOs from

1.8V to 3.35V in 50mV steps

− choosing V

OUT

of SIM-LDO of 1.8V or 3.0V

− on/off control via GPIO1, GPIO2 or GPIO3 (ANA1 must

be ON  it’s the internal supply for GPIO block)

− high-side switch of ANAx  V

OUT

of ANAx is voltage on

pin VBAT_1

DCDC Box:

− switching ON/OFF

− adjustable V

OUT

range from 0.6V to 3.4V

− on/off control via GPIO1, GPIO2 or GPIO3

− low power mode: better efficiency at light loads

− disable 100% PMOS mode to keep the duty-

cycle mode for DCDC operation (dc

max

= 91.2%)

− disable Current Force Mode: less output ripple

and less noise, but decreased efficiency at light

loads

Charge Pump Box:

− CP enabling/disabling

− CP mode switching manual

 Mode 1:1 or 1:2

− CP mode switching automatic

 starts with 1:1 mode  switches

automatically to 1:2 mode

− CP Auto On

 selection of current sinks, which control

the automatic CP mode switching

− CP frequency selection between 500kHz /

1MHz

Current Sinks Box:

− switching ON/OFF of current sinks

− adjustable I

SINK

range for CURR1/2 from 0.63mA to 160mA in

0.6275mA steps

− adjustable I

SINK

range for CURR3/4/5 from 0.16mA to 40mA in

0.1569mA steps

− on/off control via GPIO1, GPIO2 or GPIO3

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5.3 Charger

Charger Control Box:

− ChOvH:

sets the charger overvoltage protection to 6.45V

default value is 6.05V

− enabling/disabling of overvoltage protection

− enabling/disabling of charging

− enabling/disabling of Resume mode

Charger Status Box:

− ChDet: bit is set when external charger has been detected

− ChAct: bit is set when external charger is operating

− Trickle: bit is set when charger is in trickle charge mode

− CVM: bit is set when charger is in constant voltage charge mode

− EOC: bit is set when end of charging has been terminated

→ bit is cleared when ChEn is cleared

− No Batt: bit is set when no battery connection has been detected

→ bit is cleared when ChEn is cleared or a battery is connected

Charger Voltage Control Box:

− End Of Charge voltage selection

→ 4.1V or 4.2V

Charger Current Control Box:

− Constant Current selection from 0mA to 750mA in 50mA steps

− Trickle Current selection from 50mA to 200mA in 50mA steps

− End Of Charge Current selection:

→ EOC Current = Trickle Current + End Of Charge Current (fine adjustment)

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5.4 Housekeeping

GPIOs Box:

− GPIO Mode selection:

input only

push and pull (output)

open drain, only push (output)

open drain, only pull (output)

− low current: fast or low output slew rate

− Pullup/Pulldown selection

− invert of output signal

− Output source:

control through serial interface

frequency generator defined

interrupt signal

References Control Box:

− low power On: activates the low-power mode

→ reduces the quiescent current of AS3605

− low power GPIO On: low-power mode can be

activated by GPIO, if low power On is disabled

− selection of GPIO input to activate low-power

mode

− activate low-power mode when selected GPIO

input is low

Interrupts Box:

− selection of interrupt events to GPIO output source

− Interrupt Status shows the currently active interrupt

signals

Watchdog Box:

− enables/disables Watchdog block

− WD Reset On generates a reset (XRES)

− selection of WD trigger: HW (GPIO) or SW

− selection of GPIO input to the WD

− selection of high or low SW signal for triggering

− adjustment of trigger time window

Reset Control Box:

− disabling the internal Pull down at ON-pin

− Power Off button

− Force Reset button

Temperature Supervision Box:

− enabling/disabling temperature supervision

− warning flag when device temperature exceeds

110°C

− warning flag when device temperature exceeds

140°C

− clear bit to clear the 140°C flag

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5.5 Audio

Audio Control Box:

− switching On/Off of Audio Amplifier

− use low power operation for speaker ≥32Ω (stereo) or ≥64Ω (differential)

− gain adjust from -22dB up to 20dB

− reduced bias current for speaker ≥8Ω (stereo) or ≥16Ω (differential)

− reduced bias current for speaker <8Ω (stereo) or <16Ω (differential)

− stereo or differential mode

− output pulldown control if amp is switched off (30uA to 2.5mA)

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5.6 OTP_Startup

note 1: The “Sequence on” bit and the “Delay Interval” must be fused before, otherwise the “TEST STARTUP”

feature by reading the OTP registers (no BURN) doesn´t work!

Timeslot Box:

− possible regulator and corresponding output voltage selection in every timeslot:

~ Buck (0.60V to 3.40V in 50mV steps)

~ LDO_RF1; LDO_RF2; LDO_RF3; LDO_RF4 (1.80V to 3.35V in 50mV steps)

~ LDO_ANA1; LDO_ANA2 (1.80V to 3.35V in 50mV steps)

~ LDO_SIM (1.8V or 3.0V)

− every timeslot has the possibility of a delayed start up with respect to the previous

timeslot

− every regulator except LDO_ANA1 and LDO_SIM has the possibility to be

controlled via GPIOs

General

Information Box:

− showing Marketing

code AS3605

− input field for chip

revision number

− input field for

customer name

General Settings Box:

− selection of delay interval (no delay, 1ms or 4ms)

− after the last timeslot a reset signal is generated after a

chosen Reset time (10ms to 80ms in 10ms steps)

− the “Reset Mask Timer” is a debounce time for forcing a

reset because of VBAT < VRESETFALLING

− “Sequence on” enables the startup sequence

− “Auto off” keeps the chip in shutdown, as long as no

powerup condition occurs

− “Allow Regulator Reuse” allows to use a regulator

several times in one startup sequence

−

If not all timeslots are used, the “Auto Fill Slots” button

fills the remaining empty timeslots with the settings of the

last timeslot

− the “Reset Slots” button clears all entries of the timeslots

OTB Box:

− 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

(note 1)

− burning the startup sequence by fusing

the trim registers

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5.7 Startup Diagram

The Startup Diagram shows, how the regulators will startup under the adjusted conditions in the OTP_Startup tab

(see chapter 5.5).

The 1

regulator, which starts at time “0” ist the internal LDO V2_5 (not shown in the following pic) and this is fixed.

After a fixed delay of 10ms, the regulator chosen in the 1

timeslot (e.g. LDO_RF1 in this case) will start up with

1.8V, followed by the 2

timeslot, followed by the 3

timeslot and so on.

In chapter 5.6 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.

1ms delay interval

10ms reset time

−

showing regulator of each timeslot

− field to give an individual name (e.g. Reg 1)

→ is shown in the startup sequence .txt file

−

showing the adjusted voltage of the

regulator of each timeslot

− resets the field for giving an individual name

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5.8 Startup Sequence

The following picture shows the .txt file of a startup sequence saved with the button

“SAVE_OTP_STARTUP_SEQUENCE”.

6 PCB Layer Stackup

“Allow Regulator Reuse” is enabled

showing the individual name, given in

the field in the Startup Diagram tab

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7 Demoboard Schematic

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8 Demoboard Layout

Layout (top view)

Layout (bottom view)

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9 Copyright

merged, translated, stored, or used without the prior written consent of the copyright owner.

All products and companies mentioned are trademarks or registered trademarks of their respective companies.

10 Disclaimer

Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions

appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by

description regarding the information set forth herein or regarding the freedom of the described devices from

patent infringement. Austriamicrosystems AG reserves the right to change specifications and prices at any time

and without notice. Therefore, prior to designing this product into a system, it is necessary to check with

austriamicrosystems AG for current information.

This product is intended for use in normal commercial applications. Applications requiring extended temperature

range, unusual environmental requirements, or high reliability applications, such as military, medical life-support

or lifesustaining equipment are specifically not recommended without additional processing by

austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might

show deviations from the standard production flow, such as test flow or test location.

The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However,

austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not

limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect,

special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing,

performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise

or flow out of austriamicrosystems AG rendering of technical or other services.

Contact Information

Headquarters

austriamicrosystems AG

Tobelbader Strasse 30

Schloss Premstaetten

A-8141 Unterpremstaetten, Austria

T. +43 (0) 3136 500 0

F. +43 (0) 3136 5692

For Sales Offices, Distributors and Representatives, please visit:

http://www.austriamicrosystems.com/contact

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AMS AS3605 User guide

Brand: AMS

Model: AS3605

Type: User guide

generation of multiple power rails from one or two Li-Ion or Li-Polymer batteries

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AMS AS3605 User guide

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