Non-Isolated DC/DC

Browse by Tags

Non-Isolated DC/DC

Welcome to the Non-Isolated DC/DC Section of the TI E2E Support Community. Ask questions, share knowledge, explore ideas, and help solve problems with fellow engineers. To post a question, click on the forum tab then "New Post".

Tags
You have subscribed to this tag. To view or manage your tag subscriptions, click here.   Close
You have unsubscribed from this tag. To view or manage your tag subscriptions, click here.   Close
You are currently viewing:
tps61020
Related Posts

  • Forum Post: TPS61026 start up; voltage droop

    sandhya
    Hi, We are using TPS61026DRCT (fixed o/p, 1800mA) in our design. Though it is fixed o/p device, FB pin has 4.22M and 470K resistors connected to it. Inductor at SW pin is 6uH,with sat current of 2.5A. The o/p capacitors are 33uF||2.2uf||0.1uF Input voltage is 3.3V and output is 5V. This o/p voltage...
    on Apr 10, 2010

  • Forum Post: Re: TPS61026 start up

    Michael Day
    You might want to use the equations in the datasheet (equations 4 and 5) to calculate the maximum inductor current. The maximum inductor current is going to be the average inductor current (equation 4) plus 1/2 the ripple current. Rearrange equation 5 to calculate the ripple current, delta I. The peak...
    on Apr 12, 2010

  • Forum Post: Re: TPS61026 boot up problem

    Michael Day
    Can you confirm that the problem is startup related. Measure the inductor current on an oscilloscope. If the peak current is 40% of the nromal peak current (Isw Switch Current Limit), then it is a simple startup problem.
    on Apr 12, 2010

  • Forum Post: Re: TPS61026 start up; voltage droop

    Michael Day
    The datasheet is correct. The inductor peak current is equal to the switch peak current. Remember that when the power FET is on, the current flows from through the inductor and into the power FET and then to ground. During the time when the power FET is on, the FET current and inductor current are equal...
    on Apr 12, 2010

  • Wiki Page: TPS61026 boot up problem

    Michael Day
    Q: TPS61026 boot up problem by 1419131 (Please visit the site to view this file)HI I am using TPS61026, BQ24070 and BQ27501 to build my Battery management circuit. My AC-DC is 5V 2A, the battery is 3.7V Lithium Ion Battery 2250mAH. The input of TPS61026 is 4.4V and output is 5V. My load is an...
    on Apr 12, 2010

  • Forum Post: Re: TPS61026 boot up problem

    John Li47269
    Hi Jeff I tried power-on PM circuit and get 5V from VOUT of TPS61026 first and then plug in my load(CPU board end LCD). The VOUT becomes 1.8V too. On the LCD drive board, I found three inductors for boost up the voltage for the LCD back light. Maybe LCD drive board has big peak current? If so what...
    on Apr 13, 2010

  • Forum Post: Re: TPS61026 boot up problem

    John Li47269
    Hi Michael How can I catch the peak current by an oscilloscope. I got the voltage only. By put a 1 ohm load in series?
    on Apr 13, 2010

  • Forum Post: TPS61020 - Battery powered design

    Luc��a Cerezo
    Hello, I am designing a battery powered device and I would like to ask you some doubts. It is the first time I do this kind of designs and I am a bit lost! Because of the supply voltage of the components, the device requires a 3.3 voltage. However, I would like to use two alcalines so I will get...
    on Sep 17, 2010

  • Forum Post: Re: Battery powered designs

    Chris Glaser
    What are your output current requirements on the 3.3V? If they are low enough, you could also look into using the TPS61220 or TPS61070 which are simpler, smaller parts. The TPS61020 and other boost converters provide a clean, regulated output voltage that is good enough to power most circuits. For...
    on Sep 17, 2010

  • Wiki Page: TPS61029 and TPS61020 - differences between TPS61029 and TPS61020

    Chris Glaser
    Q: TPS61029 & TPS61020_differences between TPS61029 and TPS61020 by 1300154 What are the differences between TPS61020 and TPS61029. I know that these devices have different switch current limit and input voltage range, but are there any other differences between these two devices besides the current...
    on Feb 14, 2011

  • Forum Post: Re: Could TPS61030 work in LDO mode?

    Michael Day
    Please don't confuse the TPS61020 Down Mode with LDO operation. You are correct that when the TPS61020 input voltage is larger than the programmed output voltage, the IC is able to properly regulate the output voltage. This is accomplished with Down Mode. The TPS61020 still switches like a boost...
    on Apr 18, 2011

  • Wiki Page: TPS61030 - work in LDO mode?

    Chris Glaser
    Q: Could TPS61030 work in LDO mode? by 1193754 Dear all: If input voltage is 5.25V, output is fixed 5V/2000mA. As I know, TPS6102X can work at LDO mode. But TPS61030 didn't showed ths application note in datasheet. Is TPS61030 workable? it is about 0.5W power dissipation on TPS61030...
    on Apr 21, 2011

  • Wiki Page: TPS61028 : Efficiency vs Current

    Chris Glaser
    Q: TPS61028 : Efficiency vs Current by 569213 Hi; Our customer inquiries the Efficiency vs Current data of TPS61028 like Figure 3. We appreciate to get the efficiency data at Vo=3.3V, if possible Vin~1.5V. A: Re: TPS61028 : Efficiency vs Current by 1090425 The efficiency data is the...
    on Jul 19, 2011

  • Wiki Page: TPS61028 - LBO max current

    Michael Day
    Q: TPS61028 - LBO max current by 1713520 I want to use the open-drain output from the LBO pin to light an LED with at least a few milliamps. What is the maximum current can the LBO output sink on the TPS61028DRC? Regards, Sheronda A: Re: TPS61028 - LBO max current by 52475 The LBO open...
    on Jul 19, 2011

  • Forum Post: Re: TPS61028 failures

    Michael Day
    Most failures with boost converters are layout related. Poor layout results in overstressing the power FET. This damages the power FET which can result in either a short to ground or higher than expected leakage to ground. The higher than expected leakage will probably result in a short to ground after...
    on Aug 8, 2011

  • Wiki Page: TPS61020 - Is there an ESD diode between EN and VCC?

    Chris Glaser
    Q: TPS61020 - Is there an ESD diode between EN and VCC? by 1166427 Question/Problem: Is there an ESD diode between EN and VCC? Answer: There is no diode between EN and VCC. The note on page 3 about EN being clamped to VCC or GND only specifies the test conditions. You can pull EN higher than...
    on Sep 9, 2011

  • Wiki Page: TPS6102x - can I use ceramic output caps

    Chris Glaser
    Q: Can I use ceramic output capacitors with the TPS6102x? A: Ceramic output caps can only be used if a discrete resistor is added in series with them to give an equivalent ESR of at least 30 mOhm. Per the datasheet, the IC is internally compensated for an output capacitor with at least 30...
    on Sep 13, 2011

  • Wiki Page: TPS61025 powerpad not connected.

    Michael Day
    Q: TPS61025 powerpad not connected. by 493921 My customer is using TPS61025 and he suspects that he subcontractor may have not soldered the powerpad. The device is not working and they would like to know if complete inoperation is the likely result of not connecting it. They are planning to get the...
    on Mar 1, 2012

  • Forum Post: TPS61025 & TPS62172 in parallel

    Jan Zastera
    Dear Ti, could I ask you if it is possible to connect TPS61025 + TPS62172 in parallel and use one of them for powering our application (3.3V/200mA). The one, which is not used will be disablet pulling EN to low. We need to have 2xAA powering and also external 5-15V powering for our application and...
    on Oct 4, 2012

  • Forum Post: TPS61020 - simulation report of Efficiency and Phase margin

    Ho Cheol Song
    Hello, TI support Team. I'm a disty FAE in SerialMicro of Korea. My customer, I-Sens is using TPS61020 for battery application. Recently, she is considering about efficiency and phase margin. So I trided to make the report of it by using 'Switcher Pro' and 'Webench' But I could...
    on Oct 8, 2012

  • Forum Post: RE: TPS61020 Induction calculations

    Chris Glaser
    Yes, you need a different IC for such low powers. With load disconnect, I would recommend the TPS61070 or TPS61260. If you stay with the TPS61020 which I don't recommend, then you can use any value in the datasheet's range. You will always operate in power save mode at such light load currents...
    on Oct 19, 2012

  • Forum Post: RE: TPS61025 application

    Chris Glaser
    You don't need to change anything actually. The EVM is set to output 3.3V, which the TPS61025 is also set to. So, results will be the same with testing either device. But I would recommend looking into using newer devices which are smaller and don't require tantalum output caps, such as TPS61200...
    on Dec 18, 2012

  • Forum Post: RE: 5V TPS61020 output is low (~4.7V) when 4.7pF cap is across "R3" of feedback divider.

    Chris Glaser
    There is a much newer version of the datasheet on our website. Additionally, we have released many new devices since 2003 that are likely better fits for your needs. I would recommend using them over the TPS61020 family. They include TPS61200 and TPS61253/6. Your 4.7pF capacitor probably has significant...
    on Dec 21, 2012

  • Forum Post: RE: TPS61028 Low Efficiency

    Chris Glaser
    I believe these two app notes (from the product page) should address your fundamental concerns: http://www.ti.com/lit/an/slyt412/slyt412.pdf http://www.ti.com/lit/an/slva236/slva236.pdf But I would also note that different inductors will give different efficiencies. I would also recommend using...
    on Apr 8, 2013

All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.

Content on this site may contain or be subject to specific guidelines or limitations on use. All postings and use of the content on this site are subject to the Terms of Use of the site; third parties using this content agree to abide by any limitations or guidelines and to comply with the Terms of Use of this site. TI, its suppliers and providers of content reserve the right to make corrections, deletions, modifications, enhancements, improvements and other changes to the content and materials, its products, programs and services at any time or to move or discontinue any content, products, programs, or services without notice.

TI Worldwide | Contact Us | my.TI Login | Site Map | Corporate Citizenship | mobile m.ti.com (Mobile Version)

TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs and
embedded processors, along with software, tools and the industry’s largest sales/support staff.

© Copyright 1995-2013 Texas Instruments Incorporated. All rights reserved.
Trademarks | Privacy Policy | Terms of Use