Product category:
Power Supply ICs and Controllers
News Release from: Summit Microelectronics | Subject: SMB120
Edited by the Electronicstalk Editorial
Team on 02 December 2004
Convertor chip boasts nine programmable
outputs
A new concept in power supply design aims to give system design engineers unparalleled flexibility and ease of implementation.
Summit Microelectronics has developed a new concept in power supply design it says gives system design engineers unparalleled flexibility and ease of implementation Using the new Summit SMB120, designers can now digitally program the entire multiple output power supply and associated power management functions with a few clicks of a mouse compared to the tedious iterative hardware design of conventional analogue power solutions
This article was originally published on Electronicstalk on 3 Feb 2005 at 8.00am (UK)
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The SMB120 nine-channel programmable DC/DC convertor is the first in a family of new devices optimised for increasingly complex consumer electronics applications such as digital still cameras/camcorders (DSC/DCC), DVD/MP3 players/recorders, handheld and automotive GPS terminals, personal digital assistants (PDAs), portable LCD TVs, as well as the next generation of "smart" mobile phones.
"The SMB120 is Summit's first device in a series of increasingly integrated configurable precision power products for the consumer electronics market and, as such, sets a new direction for the company", stated Chuck Berghoff, Summit President and CEO.
"Consumer electronics OEMs are under intense pressures to release more products to market with shorter development cycles than ever before".
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"Summit's proven programmable analogue technology creates a 'platform' solution that allows OEMs to develop designs dramatically faster and with fewer engineering resources than with conventional offerings".
"Our new consumer products leverage Summit's programmable precision control technology, supplied for years to the world's leading communication market equipment OEMs".
"They integrate power conversion functions to a level not seen before".
"Initial customer adoption is exceeding expectations".
Incorporating a level of programmability, integration and precision previously missing in power management integrated circuits, the SMB120 uses the I2Cbus as a management bus, providing a digital, simple-to-use GUI software-driven programming interface.
Capabilities include the ability to independently sequence on/off each output with precisely controlled timing and slew rate and program or arbitrarily adjust "on-the-fly" (margining) output voltages with +/-0.5% accuracy.
The adjust function can be used as a brightness or audio level control.
Additionally, complete power system diagnostics and monitoring is provided via the digital interface.
These include input and output monitoring for under/overvoltage (UV/OV), low/missing battery detection, AC adapter detection and reset output.
All configuration data for the SMB120 are stored in on-chip EEPROM, of which 96byte is available for user data storage.
Enhancing flexibility ever further, the device can be programmed during development and then used in a "fixed" configuration or it may be reprogrammed in-system via the I2C interface.
The SMB120 incorporates a total of nine-channels of power conversion: four pulsewidth modulated (PWM) DC/DC step-down (buck) convertors, three PWM DC/DC step-up (boost) convertors, one PWM DC/DC inverting step-up/down (buck/boost) convertor, and one low-dropout linear LDO regulator.
All PWM channels are digitally programmable for output characteristics and monitoring, including voltage output levels to +/-0.5% accuracy.
This array of convertors is well suited and configurable to powering components commonly found in digital consumer electronics such as LCD-TFT displays, CCD imagers, DSPs, embedded CPUs, LED backlighting, motor drives and memory arrays.
The outputs are easily scalable for output current due to external MOSFET switches further enhancing the flexibility of application for various designs.
The SMB120 operates directly from +2.7 to +5.5V input making it ideally suited for single-cell Li-ion battery applications.
Higher input voltages (two-cell Li-ion) can be accommodated in many cases with simple applications configuration.
The operating temperature range is 0 to +70C and is available in the 64-pad QFN-64 package that is lead-free and RoHS compliant.
Available now in production quantities, the device is priced at $5.95 each in quantities of 1000 units.
To speed user product development, Summit offers customers the SMB120EV companion evaluation board providing graphical user interface (GUI) software so designers can quickly see the features and benefits and design a prototype power supply with the SMB120.
This is a complete development tool that lets designers easily manipulate the characteristics of their systems.
The SMB120EV design kit includes menu-driven Microsoft Windows graphical user interface (GUI) software to automate programming tasks and also includes all necessary hardware to interface to the parallel or USB port of a laptop or PC.
Once a user completes design and prototyping, the SMB120EV automatically generates a hex data file that can be transmitted to Summit for review and approval.
Summit then assigns a unique customer identification code to the hex file and programs the customer's production devices prior to final electrical test operations.
This ensures that the device will operate properly in the end application.
The design kit software can be downloaded today from Summit's website.
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