Power integrations InnoSwitch 3-Pro Toggle Board User manual

Power Integrations
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Title
InnoSwitch
TM 3-Pro Toggle Board (TST-
047) User’s Guide
Author
Applications Engineering Department
Document No.
AN-84
Date
June 26, 2019
Revision
1.1
Summary
AN-84 describes a tool (TST-047) which enables test and debug of InnoSwitch3-Pro
based power supplies.
The TST-047 enables a set of operating conditions to be programmed into the
InnoSwitch3-Pro IC. Once programmed, these settings are stored in a Non-volatile
memory and are automatically transferred to the InnoSwitch3-Pro IC whenever the
power is cycled. This allows testing of the InnoSwitch3-Pro based power stage without
the need for an external Microcontroller.
This tool is especially helpful when repeated tests are to be performed such as EMI or
safety tests and the InnoSwitch3-Pro based power stage is to be set to a specific
operating point. This is useful when conducting thermal tests or tests where the unit is
being modified and there is a need for the InnoSwitch3-Pro to get configured with a
specific set of parameters after each power cycle.
PATENT INFORMATION
The products and applications illustrated herein (including transformer construction and circuits external to the products) may
be covered by one or more U.S. and foreign patents, or potentially by pending U.S. and foreign patent applications assigned
to Power Integrations. A complete list of Power Integrations' patents may be found at www.power.com. Power Integrations
grants its customers a license under certain patent rights as set forth at https://www.power.com/company/intellectual-
property-licensing/.

AN-84 InnoSwitch3-Pro Toggle Board (TST-047) User’s Guide 26-Jun-19
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Table of Contents
1Introduction.................................................................................................................3
2System Diagrams.......................................................................................................4
2.1 Schematic Diagram.............................................................................................4
3Board Layout..............................................................................................................5
4Hardware....................................................................................................................6
4.1 Assembly.............................................................................................................6
5Functional Description................................................................................................7
5.1 Switches..............................................................................................................7
5.2 One Click or Single Click.....................................................................................7
5.3 Two Clicks or Double click...................................................................................7
5.4 Adjustment Range...............................................................................................7
5.5 Slide Switch (SW3 ).............................................................................................8
5.6 LED .....................................................................................................................9
5.7 I2C .......................................................................................................................9
5.8 MCU Signal Configuration...................................................................................9
6Usage Instructions....................................................................................................10
6.1 Initial Usage/ Reset Operation...........................................................................10
6.2 CV Adjustment ..................................................................................................10
6.3 CC Adjustment..................................................................................................10
6.4 VKP Adjustment................................................................................................10
6.5 Use the last stored setting.................................................................................11
7Operation..................................................................................................................12
7.1 Start-up operation..............................................................................................12
7.2 Normal Operation..............................................................................................12
8Bill of Materials.........................................................................................................13
9Revision History........................................................................................................14

26-Jun-19 AN-84 InnoSwitch3-Pro Toggle Board (TST-047) User’s Guide
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Introduction1
This manual is a user’s guide for the InnoSwitch3-Pro Toggle Board (TST-047). The
InnoSwitch3-Pro Toggle Board is a tool designed to control the InnoSwitch3-Pro power
supply
The document describes what constitutes the board, how it works and how to use it with
InnoSwitch3-Pro. It also contains the schematic, bill of materials, printed circuit board
layout.
Figure 1 –Top view of InnoSwitch3-Pro Toggle Board.
Figure 2 –Bottom view of InnoSwitch3-Pro Toggle Board.

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System Diagrams2
Schematic Diagram 2.1
Figure 3 –Schematic.

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Board Layout3
Figure 4 –PCB Top Layout.
Figure 5 –PCB Bottom Layout.

AN-84 InnoSwitch3-Pro Toggle Board (TST-047) User’s Guide 26-Jun-19
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Hardware4
Assembly 4.1
The top assembly of the board is shown below.
Figure 6 –Assembly.
The board’s key features are indicated on the table below.
Number
Description
Label
1
Increment Switch
SW1
2
Decrement Switch
SW2
3
CC/CV/VKP Selection Switch
SW3
4
PIC16F18326
U1
5
PICkit3 Programming Header
J1
6
Connector to PSU
J2
7
RGB LED Indicator
D1

26-Jun-19 AN-84 InnoSwitch3-Pro Toggle Board (TST-047) User’s Guide
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Functional Description5
Switches 5.1
At power ON, any adjustments can be made within the first 5 minutes. A
countdown timer will lock the button functionality after its timeout. No request will
be processed after 5 minutes even if the buttons were pressed.
When the user wants to re-adjust the settings but the buttons state is already
locked, a reset operation will be needed (requires power cycling).
The switches table summary below provides the following specific functions:
One Click or Single Click 5.2
Push Buttons
CV
CC
VKP
SW1
+1V
+5 LSB
+1V
SW2
-1V
-5 LSB
-1V
Two Clicks or Double click 5.3
Push Buttons
CV
CC
VKP
SW1
+200mV
+1 LSB
+200mV
SW2
-200mV
-1 LSB
-200mV
Adjustment Range 5.4
Register
Adjustment Range
Default
CV
3 ~ 20 V
5V
CC
25 ~ 128 LSB
128
VKP
5.3 ~ 24V
7V
CDC
Fixed
300mV

AN-84 InnoSwitch3-Pro Toggle Board (TST-047) User’s Guide 26-Jun-19
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Slide Switch (SW3 ) 5.5
V and A markings on the PCB correspond to Voltage and Current respectively. Based on
the settings of the slide switches the register to be updated is selected.
SW3A (V)
SW3B (A)
Switch
Configuration
Register
Selection
LED
Indicator
ON
ON
Configuration 1
No Change
OFF
OFF
ON
Configuration 2
CV
Red
ON
OFF
Configuration 3
CC
Green
OFF
OFF
Configuration 4
VKP
Blue

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LED 5.6
The LED table summary provides the following specific conditions:
LED Status
Description
Blinking every 500 ms
Very First Power ON or Reset Configuration
RGB LED Off
Button Lock Activated or No change Selected
Red LED On
Constant Voltage (CV) Update Selected
Green LED On
Constant Current (CC) Update Selected
Blue LED On
Constant Output Power Knee Voltage (VKP) Update
Selected
I
2C
5.7
The protocol board communicates with PSU using I2C.
MCU Signal Configuration 5.8
The toggle board has been designed with PIC16F18326 with the following signal
configurations:
Signal Label
Pin
No
Device Pin
Function
Pin Type
Description / Function
PB1
1
RA5
Input
SW1 Push Button
BLUE
2
RA4
Output
LED Blue
MCLR
3
MCLR
Input/Power
Master Clear (Reset) Input
PB2
4
RC5
Input
SW2 Push Button
AMP_SELECT
5
RC4
Input
Constant Current Select (SW3)
VOLT_SELECT
6
RC3
Input
Constant Voltage Select (SW3)
RED
7
RC2
Output
LED Red
SDA
8
RC1
Output
I2C Data
SCL
9
RC0
Output
I2C Clock
GREEN
10
RA2
Output
LED Green
ICSP_CLK
11
RA1
Not Used
Not Used
ICSP_DAT
12
RA0
Not Used
Not Used
---
13
VSS
Power
Ground reference for logic and I/O pins
---
14
NC
---
Not Connected
---
15
NC
---
Not Connected
---
16
VDD
Power
Positive Supply for Peripheral Logic and
I/O Pins

AN-84 InnoSwitch3-Pro Toggle Board (TST-047) User’s Guide 26-Jun-19
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Usage Instructions6
This section provides step by step instructions on how to operate the board correctly.
Initial Usage/ Reset Operation 6.1
To use the board for the 1st time or to reset the saved setting on the EEPROM.
Set the Slide switch to configuration 4 (SW3A –Off and SW3B –Off)
After board power up, LED is expected to be blinking which means the board
underwent a reset operation.
CV Adjustment 6.2
Set the Slide switch to configuration 2 (SW3A –Off and SW3B –On)
LED is expected to be RED in color when power is applied to the board
Adjust CV by pressing the push buttons
This setting will be automatically stored to the EEPROM
Leave the Slide Switch configuration to either Configuration 1, 2, or 3.
This will ensure that the saved configuration on the EEPROM will be used upon
power cycle
Button press will be automatically disabled after 5 mins and LED will be Off
CC Adjustment 6.3
Set the Slide switch to configuration 3 (SW3A –On and SW3B –Off)
LED is expected to be GREEN in color when power is applied to the board
Adjust CC by pressing the push buttons
This setting will be automatically stored to the EEPROM
Leave the Slide Switch configuration to either Configuration 1, 2, or 3.
This will ensure that the saved configuration on the EEPROM will be used upon
power cycle
Button press will be automatically disabled after 5 mins and LED will be Off
VKP Adjustment 6.4
Set the Slide switch to configuration 4 (SW3A –Off and SW3B –Off). Since
this is the same setting as the reset setting, the user should make sure that
after power up, the switch is in configuration 1, 2 or 3 before bringing it to
configuration 4 for adjusting Vkp.
LED is expected to be BLUE in color when power is applied to the board
Adjust VKP by pressing the push buttons
This setting will be automatically stored to the EEPROM
Leave the Slide Switch configuration to either Configuration 1, 2, or 3.
This will ensure that the saved configuration on the EEPROM will be used upon
power cycle
Button press will be automatically disabled after 5 mins and LED will be Off

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Use the last stored setting 6.5
Leave the Slide Switch configuration to either Configuration 1, 2, or 3.
Do not make any adjustments
EEPROM date will be uploaded to InnoSwitch3-Pro
After 5 mins LED will be Off

AN-84 InnoSwitch3-Pro Toggle Board (TST-047) User’s Guide 26-Jun-19
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Operation7
Start-up operation 7.1
When power cycle is done, the board initially checks the setting of the slide
switch.
If SW3A and SW3B are both OFF, then the previously saved EEPROM Data will be
erased and default configuration stored on the EEPROM is transferred to
InnoSwitch3-Pro using I2C.
Register
EEPROM Default Configuration
CV
5V
CC
128 LSB
VKP
7V
CDC
300 mV
Normal Operation 7.2
When the toggle board is connected to an InnoSwitch3-Pro power stage and input supply
is turned ON, the sequence of operation is as follows:
1. The power supply turns ON normally with 5V as usual but the bus switch
remains OFF.
2. uVCC provides power to the toggle board.
3. Microcontroller on toggle board downloads the set point configurations
from its memory and uploads it to InnoSwitch3-Pro
4. InnoSwitch3-Pro adjusts the output voltage and current limit accordingly.
5. Microcontroller uses telemetry to confirm InnoSwitch3-Pro is ready with the
desired voltage.
6. Microcontroller asks InnoSwitch3-Pro to turn ON the bus switch
immediately
bus switch will be on after 1 sec for voltage lesser than 5V
7. Correct output voltage then appears at the output.
Each time voltage, current, and/or VKP is adjusted, that information is stored in the
EEPROM and downloaded automatically when power is cycled.
Once the EEPROM data has been updated, at every power cycle, the button timeout of
5min will automatically start counting and buttons will be disabled thereafter. This
provides an opportunity to make any setting changes.

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Bill of Materials8
Complete list of the components used for the project.

AN-84 InnoSwitch3-Pro Toggle Board (TST-047) User’s Guide 26-Jun-19
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Revision History9
Date
Author
Revision
Description & changes
Reviewed
06-Jun-19
CS
1.0
Initial
Apps & Mktg
26-Jun-19
CS
1.1
*Added Summary Description
*Updated Table Format
*Added Adjustment Range Table
*Changed J2 Header to
6 Position (1x6)
Apps & Mktg

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For the latest updates, visit our website: www.power.com
Reference Designs are technical proposals concerning how to use Power Integrations’ gate drivers in particular applications and/or with certain
power modules. These proposals are “as is” and are not subject to any qualification process. The suitability, implementation and qualification are
the sole responsibility of the end user. The statements, technical information and recommendations contained herein are believed to be accurate
as of the date hereof. All parameters, numbers, values and other technical data included in the technical information were calculated and
determined to our best knowledge in accordance with the relevant technical norms (if any). They may base on assumptions or operational
conditions that do not necessarily apply in general. We exclude any representation or warranty, express or implied, in relation to the accuracy or
completeness of the statements, technical information and recommendations contained herein. No responsibility is accepted for the accuracy or
sufficiency of any of the statements, technical information, recommendations or opinions communicated and any liability for any direct, indirect or
consequential loss or damage suffered by any person arising therefrom is expressly disclaimed.
Power Integrations reserves the right to make changes to its products at any time to improve reliability or manufacturability. Power Integrations
does not assume any liability arising from the use of any device or circuit described herein. POWER INTEGRATIONS MAKES NO WARRANTY
HEREIN AND SPECIFICALLY DISCLAIMS ALL WARRANTIES INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT OF THIRD PARTY RIGHTS.
Patent Information
The products and applications illustrated herein (including transformer construction and circuits’ external to the products) may be covered by one
or more U.S. and foreign patents, or potentially by pending U.S. and foreign patent applications assigned to Power Integrations. A complete list of
Power Integrations’ patents may be found at www.power.com. Power Integrations grants its customers a license under certain patent rights as
set forth at http://www.power.com/ip.htm.
Power Integrations, the Power Integrations logo, CAPZero, ChiPhy, CHY, DPA-Switch, EcoSmart, E-Shield, eSIP, eSOP, HiperPLC, HiperPFS,
HiperTFS, InnoSwitch, Innovation in Power Conversion, InSOP, LinkSwitch, LinkZero, LYTSwitch, SENZero, TinySwitch, TOPSwitch, PI, PI Expert,
PowiGaN, SCALE, SCALE-1, SCALE-2, SCALE-3 and SCALE-iDriver, are trademarks of Power Integrations, Inc. Other trademarks are property of
their respective companies. ©2019, Power Integrations, Inc.
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