AMS AS3710 User guide

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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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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)

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

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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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