Dialog DA9318 Manuale utente

User Manual

DA9318 Direct Charging

Reference Board

UM-PM-022

Abstract

This document describes the hardware and software used to evaluate the DA9318 direct charging

reference board.

UM-PM-022

DA9318 Direct Charging Reference Board

User Manual

Revision 1.0

1-Mar-2017

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Contents

Abstract................................................................................................................................................ 1

Contents............................................................................................................................................... 2

1Terms and Definitions................................................................................................................... 3

2References..................................................................................................................................... 3

3Introduction.................................................................................................................................... 4

4Functional Description ................................................................................................................. 6

4.1 Master Charger ..................................................................................................................... 6

4.2 Power Monitor....................................................................................................................... 7

4.3 Direct Charging ..................................................................................................................... 7

4.4 Over-Voltage Protection........................................................................................................ 7

4.5 Direct Charging Sequence.................................................................................................... 8

5DA9318 Direct Charging Reference Board Hardware................................................................ 9

5.1 Default Link Positions and Connector Definitions............................................................... 10

5.2 USB Interface...................................................................................................................... 14

5.2.1 USB Power and GUI Reset ................................................................................. 14

5.3 Power Supplies ................................................................................................................... 14

6DA9318 Direct Charging Reference Board Software............................................................... 15

6.1 GUI Installation.................................................................................................................... 15

6.1.1 GUI Installation Step By Step Guide ................................................................... 16

6.2 Initial USB Connection........................................................................................................ 19

7GUI Software................................................................................................................................ 20

7.1 Controls............................................................................................................................... 20

7.2 Control Widgets................................................................................................................... 21

7.2.1 Enable/Disable Polling......................................................................................... 21

7.2.2 Charging Status Indicators .................................................................................. 21

7.2.3 Raw I/O................................................................................................................ 22

7.2.4 Interface Control Information............................................................................... 22

7.2.5 I2C Bus Scan........................................................................................................ 22

7.2.6 Settings................................................................................................................ 23

7.3 Quick Start Guide................................................................................................................ 24

7.3.1 Operational Steps................................................................................................ 25

Revision History ................................................................................................................................ 26

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DA9318 Direct Charging Reference Board

User Manual

Revision 1.0

1-Mar-2017

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1 Terms and Definitions

GND Ground

GUI Graphical User Interface

IC Integrated Circuit

JTAG Joint Test Action Group

LED Light Emitting Diode

LS Level Shifter

OTG On-The-Go

PC Personal Computer

PD Power Delivery

RCP Reverse Current Protection

SAM3U USB I2C Interface

SCL Serial CLock

SDA Serial DAta

TA Travel Adaptor

USB Universal Serial Bus

2 References

[1] DA9318 Datasheet, Dialog Semiconductor

[2] 329-03-A_ SCH.pdf, Dialog Semiconductor

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DA9318 Direct Charging Reference Board

User Manual

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1-Mar-2017

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3 Introduction

The purpose of the reference board is to demonstrate DA9318 in a direct charging application.

The document covers a normal charging cycle, using an off-the-shelf charger IC and a charging cycle

with the direct charging enabled. Direct charging means connecting the travel adaptor (TA) directly to

the battery in the constant current charging phase. A block diagram of the DA9318 direct charging

reference board is shown in Figure 1.

DA9318 Direct Charging Reference Board

DA9318

Type-C Receptacle

VBUS

Master Charger

SYS

Atmel

SAM3U

D+

D-

VBUS

GND

SYS

BAT

Mini-B

Receptacle

BAT

IN OUT

D+ PORT

D- PORT

SCL

SDA

D+ SAM3U

D- SAM3U

GPIO

LP3871 3V3

Travel

Adaptor

Battery

Emulator

Load

nCE

nPG

STAT

nCPEN

SYS

ILIM

IUSB[2:0]

ILIM GND

INA219

IN+ IN-

VS SCL

SDA

SYS

GND

Hammer board

nPG

nCHG

Power

Supply

PGND

PMID

SCL

SDA

BOOT

3V3

MPC4725

VDD

SCL

SDA

4V9

VSS

VOUT D+ PORT

D- PORT

D+ DAC

MPC4725

VDD

SCL

SDA

4V9

VSS

VOUT D- DAC

nCS

SCLK

MOSI

MISO

I2C

SPI

D+ SAM3U

D- SAM3U

FAN25

58 1V8

1V8

+5V_USB

OTG nQON

GND

VBUS

CON VBUS

SYS

TPD1S514

J37

10 mΩ

INA219

IN+ IN-

VS SCL

SDA

SYS

10 mΩ

DLINK

LP3878 4V9

HV LS I2C_HV

SDA_HV

SCL_HV

SDA_HV

SCL_HV

SDA_HV

SCL_HV

4V91V8

CC1

CC2

FUSB302B SCL

SDA

CC1

CC2

VDD

4V9

J64

Figure 1: DA9318 Direct Charging Block Diagram

The DA9318 direct charging reference board, see Figure 2, facilitates the measurement, evaluation,

and configuration of a battery charging cycle when connected to a TA that includes the iW1780H

primary side controller and iW676 secondary side controller chip set.

Dialog’s software package SmartCanvas™ uses a simple graphical user interface which enables

DA9318 to be controlled via the USB port of a PC. The mini USB connection is visible on the left side

of the board. When the cable is connected to the USB port of the PC the green LED (D1) is on.

The board contains jumper links, see Figure 6, to provide access to alternative configurations and

measurement test points. Most standard operating modes are evaluated with minimal link changes.

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DA9318 Direct Charging Reference Board

User Manual

Revision 1.0

1-Mar-2017

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Figure 2: DA9318 Direct Charging Reference Board (329-03-A)

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DA9318 Direct Charging Reference Board

User Manual

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1-Mar-2017

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4 Functional Description

During direct charging the master charger of the battery operated device is bypassed and the TA is

directly connected to the battery.

The difference between normal charging and direct charging is illustrated in Figure 3.

In order for the direct charging to work, the TA has to have a configurable output voltage and current

limit.

DA9318

Master Charger SYS

BAT

IN OUT

nCPEN

nCE

SYSVBUS

'0'

’1'

DA9318

Master Charger SYS

BAT

IN OUT

nCPEN

nCE

SYSVBUS

'1'

’0'

Figure 3: Normal Charging (Top) and Direct Charging (Bottom)

4.1 Master Charger

The master charger is capable of handling a complete charging cycle without host interaction.

The input current limit is set via GPIOs and the charging current and dynamic power management

thresholds are set with external pull-down resistors.

The charging statuses are communicated via LEDs. The master charger can be enabled with the

nCE signal driven from the microcontroller. During direct charging the master charger is disabled.

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User Manual

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4.2 Power Monitor

Two power monitor ICs (INA226), fitted on the DA9318 direct charging reference board, allow for

measurement of the master charger input voltage and input current, and for monitoring the battery

current and voltage.

That information is read out via the I2C interface and used in the control GUI software running on the

PC.

When direct charging is enabled, the DA9318 internal ADC is monitoring the input/output current and

input/output voltage.

Power monitoring is a safety feature associated with direct charging. The input power of the mobile

device has to be compared to the output power of the TA. A mismatch indicates a fault condition and

the charging has to be terminated.

4.3 Direct Charging

Reverse current protection (RCP) is enabled whenever DA9318 is not in the ACTIVE mode.

DA9318 is capable of starting up when VIN is within the accepted range defined by VIN2OUT_MIN and

VIN2OUT_MAX. If VIN is not within the accepted range during start-up, the start-up is aborted.

When the above conditions are satisfied the DA9318 can be enabled by writing CP_EN to allow for

direct charging. The TA voltage is set accordingly to allow an initial 6 A charge current into the

battery.

During direct charging the master charger is disabled.

4.4 Over-Voltage Protection

Over-voltage protection (OVP) is needed for general protection of devices connected to VBUS.

TI TPD1S514, Fairchild FPF2280, and Kinetic KTS1682 can be used as they all are pinout

compatible parts with very similar feature sets.

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DA9318 Direct Charging Reference Board

User Manual

Revision 1.0

1-Mar-2017

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4.5 Direct Charging Sequence

A sequence diagram for direct charging is depicted in Figure 4.

NOTE

The DA9318 direct charging reference board communication to the TA is achieved using a Dialog proprietary

secondary-side to primary-side digital link communication protocol. The sequence diagram in Figure 4 is

provided for information only. Please contact ic[email protected] for more information.

DA9318TA Main

Charger

Read (VBAT)

loop

Power

Monitor

Control

nPG=’0'

Read VBAT

Configure target VBUS

based on BATT

Write (TARG_VBUS)

TA Control implements first BCS

signaling and then attempts setting

VBUS via QC or AFC signalling

Set (VBUS)

Done

Read (VBUS)

If VBUS rises to the

target value, direct

charging is continued

nCE=’1'

CP_EN=’1'

loop Read (IIN)

Direct charging begins

Read (VBUS)

Write (TARG_VBUS)

Write (TARG_ILIM)

As VBAT rises the output voltage of the

TA is increased. After the target VBAT

is hit the current limit of the TA is step-

wise reduced

Set (VBUS)

loop

Direct charging ends

CP_EN=’0'

nCE=’0'

Set (ILIM)

The TA ramps up

the voltage

Write (TARG_ILIM)

Set (ILIM)

The main charger

starts charging

automatically

The main charger

handles the rest of the

charging cycle

Read (VBAT)

Battery connected

Mini USB connected

TA connected

Figure 4: Sequence Diagram for Direct Charging

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DA9318 Direct Charging Reference Board

User Manual

Revision 1.0

1-Mar-2017

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5 DA9318 Direct Charging Reference Board Hardware

The DA9318 direct charging reference board functionality can be broken down into sections, see

Figure 5:

●USB Type-C™cable input, OVP switch, input connector.

●Master charger / ADCs.

●DA9318 direct charging.

●USB interface (I2C communication) and USB reset.

●Voltage monitoring connectors and IOs.

●Battery and system connectors.

Figure 5: Functional Sections

Master Charger /

ADCs

DA9318 Direct Charging

USB Interface (I2C

Communication) and USB

Reset

USB Type-C Cable Input, OVP

Switch, Input Connector

Voltage Monitoring Connectors and IOs

Battery and

System

Connectors

UM-PM-022

DA9318 Direct Charging Reference Board

User Manual

Revision 1.0

1-Mar-2017

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5.1 Default Link Positions and Connector Definitions

Figure 6: Default Link Positions

Table 1: Default Link Positions and Connector Definitions

Reference Designator

Position

Function

IN sense point

GND sense point

IN connector

1-2

I2C pull-up to VDD_IO

OUT connector

Line transient connector

OUT load transient connector

J10

GND connector (IN side of board)

J11

GND connector (IN side of board)

J12

GND connector (OUT side of board)

J13

GND connector (OUT side of board)

J14

J15

JTAG: reserved

J16

Measurement header

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