Boost-INV click
PID: MIKROE-3124
Weight: 26 g
Boost-INV click is a very useful DC/DC
voltage converter device, as can
output both positive and negative
voltage, boosted up to 12.78V and
-13.95, from a single fixed voltage
input. The input voltage can vary
between 2.55V to 5.5V, making the
Boost-INV click an ideal solution for
powering devices with complex, split-
rail power supply demands, using only
a common battery. A special feature of
the LTC3582 integrated DC/DC
converter is the presence of the I2C
interface, which is uncommon for
devices of this type: it allows
configuring of the output voltages,
power sequencing, and output voltage
ramp rates. It has an OTP memory
also, which can be used to store the
power-on default values.
1
- +
Quantity
Looking for
customized version of
this product?
If you have other
questions about this
product contact us
here.
Add to Cart
⊕Hover to zoom
Table of contents
1. How does it work?
2. Specifications
3. Pinout diagram
4. Onboard Jumpers and Settings
5. Boost-INV click electrical
specifications
6. Software support
7. mikroSDK
8. Downloads
High integration rate of the Boost-INV click allows it to use low number of
external components. Advanced switching control of the LTC3582 allows
very high efficiency and reduced EMI for using it in audio, or similar EMI
sensitive applications. Output disconnect feature prevents current leaking
(battery discharge) when the device is powered off. These features allow this
Click board™ to be used as a very compact programmable split-rail power
supply used for general purpose applications, low power audio applications,
LCD and OLED displays and similar applications that use dual power supply
source.
How does it work?
The main component of the Boost-INV click is the LTC3582, programmable
boost and inverting DC/DC converter with OTP memory, from Analog
Devices. This IC is actually a dual circuit, offering a boost DC/DC converter
and an inverter, in one package. The boost converter can provide up to
12.78V on the output while driving the load with up to 350mA. The inverter
can provide -13.95V, offering up to 600mA to the connected load, before the
current limiting is activated.
The boost converter uses an advanced switching scheme with the source-
grounded NMOS as the main switching element, controlling both the off-
NEW
PRODUCTS |SUPPORT |BLOG |ABOUT US
Search products
time and the peak current. The programmable voltage divider on the output
provides the feedback voltage, needed for the regulation. The inverter
topology allows a single inductor to be used on the output, simplifying the
design.
As already mentioned, the LTC3582 features a set of programmable
parameters, which can be accessed via the I2C interface. These parameters
include configuring the output voltages, power sequencing, and output
voltage ramp rates. An onboard OTP non-volatile memory can be
programmed with values that will be used at the startup. The command
register (CMDR) is reset to 0x00h upon powering up, which disables the
outputs and sets the device to read parameters stored in the OTP area. If
the OTP memory area is empty, it is necessary to set up working parameters
first (output voltage, power up sequence, charging current for the ramp-up
capacitors…), before using the device. It is worth mentioning that there are
three bits in the CMDR register, referred to as RSEL0, RSEL1, and RSEL2 in
the LTC3582 datasheet, which redirects the device to use either registers or
the OTP memory. When set to 0, the device uses parameters stored in the
OTP memory. Note that 0x00h is the default value of the CMDR register,
meaning settings stored in the OTP will be used by default, after power on.
It is possible to dynamically change values of the output voltages and other
configurable working parameters. However, it is highly recommended to
disable the device (SWOFF bit of the CMDR register) before modifying
working parameters, since large output voltage changes can cause large
current spikes on the switching circuitry if performed in real-time, while the
switching circuit is running.
Programming the OTP requires an external power source, which is fairly
filtered (possibly with a filtering capacitor on the output). Voltage drop
under 13V might trigger the FAULT bit and render the device unusable. This
voltage ranges from 13V to 15V. The Click board™ is equipped with the
standard 2.54mm (100mil) header for this purpose. Once the programming
voltage is connected (VPP pad), the WOTP bit of the CMDR register initiates
the programming. The complete algorithm with the detailed description of
the OTP programming procedure can be found in the LTC3582 datasheet.
An onboard SMD jumper labeled as VSEL allows selection between the 3.3V
and 5V power rail from mikroBUS™, routing it to the voltage input pin of the
LTC3582 IC. The I2C pull-up resistors are also connected to this voltage,
allowing communication with both 3.3V and 5V MCUs.
The Click board™ also offers the I2C address selection jumper, labeled as
the I2C ADD. This jumper selects between two possible 7bit addresses: left
position sets the I2C slave address to 0x49h, while the right position sets the
address to 0x69h. Note that this is the 7bit address only - to get the
complete I2C address, an R/W bit needs to be added at the end.
Input screw terminals allow secure connection for the load and are clearly
labeled to avoid confusion: the V- pin offers the negative voltage, while the
V+ pin outputs positive voltage. GND pins are connected to the common
ground of the Click board™.
Specifications
Type Boost
Applications
The Click board™ can be used as a very compact
programmable split-rail power supply used for
general purpose applications, low power audio
applications, LCD and OLED displays and similar
applications that use dual power supply source
On-board modules
LTC3582, programmable boost and inverting
DC/DC converter with OTP memory, from Analog
Devices
Key Features
Programmable output, OTP memory for storing
of default parameters, high efficiency switching
scheme, both boosting and inverting options in
the same die, low count of external components
required, and more
Interface I2C
Input Voltage 3.3V or 5V
Click board size L (57.15 x 25.4 mm)
Pinout diagram
This table shows how the pinout on Boost-INV click corresponds to the
pinout on the mikroBUS™ socket (the latter shown in the two middle
columns).
Notes Pin Pin Notes
NC 1AN PWM 16 NC
Chip Enable EN 2RST INT 15 NC
NC 3CS RX 14 NC
NC 4SCK TX 13 NC
NC 5MISO SCL 12 SCL I2C Clock
NC 6MOSI SDA 11 SDA I2C Data
Power supply 3.3V 73.3V 5V 10 5V Power supply
Ground GND 8GND GND 9GND Ground
Onboard Jumpers and Settings
Label Name Default Description
LD1 PWR -Power LED indicator
JP1 VSEL Right Input voltage selection: left position 3.3V,
right position 5V
JP2 I2C ADD Right I2C address selection: left position 0x49h,
right position 0x69h
TB1 GND, V- -Negative voltage output terminal
TB2 GND, V+ -Positive voltage output terminal
HD1 GND, VPP -External programming voltage header
Boost-INV click electrical specifications
Description Min Typ Max Unit
Input voltage (mounted on the mikroBUS™)3.3 5 5 V
Positive output voltage (boost converter) 3.52 -12.94 V
Negative output voltage (inverting
converter) -1.18 --14.2 V
Switching current limit on V+ (boost
converter) 285 430 mA
Switching current imit on V- (inverting
converter) 490 720 mA
Software support
We provide a library for the Boost-INV click on our LibStock page, as well as a
demo application (example), developed using MikroElektronika compilers.
The demo can run on all the main MikroElektronika development boards.
Library Description
Library initializes and defines I2C bus driver and driver functions which offer
a choice to write data in registers and to read data from registers. The
library includes the function for sets positive and negative output voltage
and function for enable chip. The user has to set a positive voltage from
3200mV to 12750mV with a step of 50mV and set the negative voltage from
-1200mV to -13950mV with a step of 50mV.
Key functions :
void boostinv_setPositiveVoltage(uint16_t voltage) - Functions which
set the positive output voltage
void boostinv_setNegativeVoltage(int16_t voltage) - Functions which set
the negative output voltage
void boostinv_enable() - Functions for enable chip
Example description
The application is composed of three sections :
System Initialization - Initializes I2C module and sets the RST pin as the
OUTPUT
Application Initialization - Initializes the Driver, enables chip and selects
programming registers
Application Task - (code snippet) - Changes the positive and negative output
voltage. Positive output voltage goes from 3200mV to 12750mV with a step of
50mV Negative output voltage goes from -1200mV to -13950mV with a step of
50mV
void applicationTask()
{
// Sets Positive output voltage
Positive_Vout = 3200;
boostinv_setPositiveVoltage(Positive_Vout);
Delay_ms( 5000 );
Positive_Vout = 7750;
boostinv_setPositiveVoltage(Positive_Vout);
Delay_ms( 5000 );
Positive_Vout = 12000;
boostinv_setPositiveVoltage(Positive_Vout);
Delay_ms( 5000 );
Positive_Vout = 7750;
boostinv_setPositiveVoltage(Positive_Vout);
Delay_ms( 5000 );
// Sets Negative output voltage
Negative_Vout = ‐1450;
boostinv_setNegativeVoltage(Negative_Vout);
Delay_ms( 5000 );
Negative_Vout = ‐6700;
boostinv_setNegativeVoltage(Negative_Vout);
Delay_ms( 5000 );
Negative_Vout = ‐11050;
boostinv_setNegativeVoltage(Negative_Vout);
Delay_ms( 5000 );
Negative_Vout = ‐6700;
boostinv_setNegativeVoltage(Negative_Vout);
Delay_ms( 5000 );
}
The full application code, and ready to use projects can be found on our
LibStock page.
Other mikroE Libraries used in the example:
I2C
Additional notes and information
Depending on the development board you are using, you may need USB
UART click, USB UART 2 click or RS232 click to connect to your PC, for
development systems with no UART to USB interface available on the board.
The terminal available in all MikroElektronika compilers, or any other
terminal application of your choice, can be used to read the message.
mikroSDK
This click board is supported with mikroSDK - MikroElektronika Software
Development Kit. To ensure proper operation of mikroSDK compliant click
board demo applications, mikroSDK should be downloaded from the
PRODUCTS IN THE SAME CATEGORY
PRODUCT LINES
TOOLCHAINS
COMPANY
RESOURCES
Follow us on:
click Boards™ | Compilers | Development Boards | Smart Displays | Programmers | Development Kits |
Customization
PIC | dsPIC | PIC32 | ARM | AVR | FT90x | 8051
About us | Contact | Support | Distributors | Careers | Internship | Make a click™ program
mikroBUS™ | mikroSDK | Hexiwear™ | Libstock™ | Blog | eBooks | Forum | Outlet | Legacy Products
Copyright© 2018 MikroElektronika d.o.o. | Terms and Conditions | Privacy Policy
Subscribe to our newsletter:
Email address
By subscribing to newsletter you agree to our
terms and conditions and the privacy policy.
LibStock and installed for the compiler you are using.
For more information about mikroSDK, visit the official page.
Downloads
mikroBUS™ Standard specification
LibStock: mikroSDK
Boost INV click: 2D and 3D files
LT3582 Datasheet
Boost INV click schematic
LibStock: Boost INV click library
To give you the best possible experience, this
site uses cookies. Using our site means you're
agreeing to our use of cookies. We have
published a new cookie policy, which you
should read to find out more about the cookies
we use. View cookies policy.
Got it!
