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TPS65070
Related Posts

  • Forum Post: TPS65073 DVS slew rate

    ChristianHoefling
    Question : What is the expected maximum slew rate if DEFSLEW is set to “immediate”? Customer is trying to get the voltage scaling as quick as possible (they use DEFDCDC3 to change between 2 voltages). Customer would like to know how long they have to wait from an OMAP3 perspective before...
    on Jan 30, 2010

  • Forum Post: Re: TPS65073 DVS slew rate

    ChristianHoefling
    Answer : Setting DEFSLEW to immidiate will result in approx 10mV/us slew rate. Originally there was a GO bit that needed to be set to start voltage change. The option immidiate did not need the this GO bit to be set. This function was removed, so all slew rate option start voltage change with...
    on Jan 30, 2010

  • Forum Post: TPS65073 - Exposed Thermal Pad location

    Michael Day
    The TPS65073 exposed thermal pad appears to be centered in the M echanical Data page of the datasheet. The Thermal Pad Mechanical Data page shows that the pad is off center. Which is correct?
    on Feb 11, 2010

  • Forum Post: Re: TPS65073 - Exposed Thermal Pad location

    Michael Day
    The package Mechanical Data drawing is not dimensioned, so it can not be used to understand or define the thermal pad. Thermal Pad Mechanical Data drawing is dimensioned and is intended to show the thermal pad dimensions and location. Please note that the TPS65070 and TPS65073 do not have a "PowerPAD"...
    on Mar 2, 2010

  • Forum Post: TPS65070 wLED boost connections if not used

    Vladimir Svinolobov
    Greetings. A little question about using TPS65070 wLED boost block. I don`t need it in my project, so i want to turn it off. So the question is how to do it properly. Can i just left it`s legs not connected or i must connect them to ground? Best regards, Vladimir
    on Mar 8, 2010

  • Forum Post: Re: TPS65070 wLED boost connections if not used

    Michael Day
    If the TPS65073 wLED (white light led driver) boost is not used, connect ISET1 with a 100kohm resistor to ground ISET2 with a 100kohm resistor to ground ISINK1 to ground ISINK2 to ground FB to ground L4 to ground
    on Mar 8, 2010

  • Forum Post: Re: No using the TPS65070 Power Path

    ChristianHoefling
    If you are not using the charger we recommed the following pin connection : 1) SYS Connect SYS (pins 7 & 8) directly to VINDCDC1/2 , VINDCDC3. The internal power path is either powered from AC, USB , BAT or SYS. So one of these inputs needs to be connected to the supply voltage. We recommend...
    on Mar 29, 2010

  • Forum Post: Re: TPS65070 Threshold maximum voltage

    ChristianHoefling
    Hello, the maxiumum votage on THRESHOLD should not exceed 7.0V (abs. max. voltage see datasheet page 2) & shoudl be <= the highest supply voltage of the TPS65070. Example 1 : V_AC = 12V V_USB = 5V ==> V(THRESHOLD,MAX) = 5V Example 2: V_AC = 12V V_USB not...
    on Apr 16, 2010

  • Forum Post: TPS65073 with OMAP3530 clarifications requested

    Bjorn Wesen
    Hi! I'm designing an OMAP3530-system which only requires a simple PMU so I think the TPS65073 would fit well. However, the design-in Wiki and the TPS6507x documentation is a bit sparse or downright ambigous on a couple of points which I thought I'd ask here: 1) If not using a battery...
    on May 18, 2010

  • Forum Post: TPS65072 for GSM module; max output capacitance

    Krzysztof Marcinek
    I'd like to use TPS65072 for my uC li-ion baterry design. The first DCDC will be set on 3.3V and supply uC I/O, Nand Flash and few other peripherals. The question is will it be enough to supply also GSM module. It's specs are 3.3-4.5V, 250mA avg. and 1.5A peak!. There will be two 1000uF caps...
    on Jul 20, 2010

  • Forum Post: Re: TPS65072

    Michael Day
    Common practice for an RF PA design is to make sure the power supply is capable of providing the average RF PA current. During transmission, the load current goes higher than the power supply can deliver and the power supply operates in current limit. The output voltage is allowed to droop during this...
    on Jul 21, 2010

  • Forum Post: Re: TPS65070 power path

    ChristianHoefling
    You are correct. In case AC or USB is used, SYS output voltage should ramp up as soon as AC/ USB voltage is applied. The converter can be enabled afterwards with falling edge and /PB_IN or pulling up POWER_ON && high level on /PB_IN. What is the SYS voltage you are seeing when you apply...
    on Aug 3, 2010

  • Forum Post: Re: TPS65070 - not using touchscreen

    Michael Day
    If the TPS65073 touch screen controller is not used, connect AD_IN1 (TSX1) to ground AD_IN2 (TSX2) to ground AD_IN3 (TSY1) to ground AD_IN4 (TSY2) to ground Bypass and INT_LDO still need their recommended capacitor connected to maintain stability of the internal power supplies.
    on Aug 6, 2010

  • Forum Post: Re: TPS65070 Clock stretching

    ChristianHoefling
    The TPS6507x family of devices does not support clock stretching. I think the problem is something else, so you have any other slaves on the I2C bus? Can you mabe send a scope plot of the protocol you send?
    on Aug 11, 2010

  • Forum Post: Re: TPS650732 RESET

    ChristianHoefling
    Once the PMU has started up, pulling /PB_IN low will not shut down the DCDC converters. You need to pull POWER_ON low, to disable the converters. The only way you can use the /PB_IN to shutdown the PMU is, detect press on pushbutton with PB_OUT on the processor side. Based on an interrupt...
    on Aug 30, 2010

  • Forum Post: Re: Software Drivers for TPS6507x

    ChristianHoefling
    Answer : Please note that we do not provide any drivers for this IC. The customer is intended to do this on his own. Anyhow, the customer should be able to use this IC with minimal software development.
    on Sep 1, 2010

  • Forum Post: TPS65070 power up/down methods and sequencing for L138

    clliu
    Hi, Will use TPS65070 to power L138, have read its datasheet and a few related docs s few times, but still have couples of questions not clear: 1, SYS voltage should ramp up as soon as AC or USB is applied, regardless of the state of or actions on PB_IN or POWER_ON . is this correct? 2, After...
    on Sep 26, 2010

  • Forum Post: Re: TPS65070 power up/down methods and sequencing for L138

    ChristianHoefling
    Please find asnwers embedded below. 1, SYS voltage should ramp up as soon as AC or USB is applied, regardless of the state of or actions on PB_IN or POWER_ON . is this correct? Yes this is correct, SYS will ranp up as soon as voltage at AC or USB is applied. 2, After applying AC or USB voltage...
    on Sep 27, 2010

  • Forum Post: TPS65070 and OMAP-L138 RTC Supply

    Andy Bartfay
    Hello, Both the TPS65070 datasheet (page 72) and the "Powering Freon with TPS65070" application note (SLVA371A, page 4) show the OMAP-L138 RTC_CVDD LDO powered from the TPS65070's AVDD6 output. - Why AVDD6 and not SYS? - What is the voltage of AVDD6? Thanks.
    on Sep 30, 2010

  • Forum Post: Re: TPS65070 and OMAP-L138 RTC Supply

    ChristianHoefling
    Typ. the RTC needs to be powerd all the time. AVDD6 is an always on rail, while SYS can be powered down. AVDD6 is an internal suply voltage that is for supply of the IC if SYS is turned of. Basically it is a second power path that is always on. A load of max. 1mA can be connected to AVDD6. The voltage...
    on Oct 1, 2010

  • Forum Post: Re: TPS65070 Battery charger state diagram

    ChristianHoefling
    The charger is enabled by default. It will start a new charge cycle once AC or USB supply is conneced and the battery voltage is within a valid charging range. You do not need to enable the charger before it starts a new charge cycle (enabled by default). Once the battery voltage drops below the...
    on Nov 12, 2010

  • Forum Post: Re: Reverse Battery Protection for the TPS65070?

    Michael Day
    I'm glad to know that you already read the application note. I'm sorry that it didn't provide the information you needed. I appologize for prematurely marking the thread as "answered". It is very rare that the person asking the original question marks the thread as answered after...
    on Dec 3, 2010

  • Forum Post: Re: Powering up TPS65070 with huge capacitors on SYS

    ChristianHoefling
    Hello Anisimov, The slow increase of the SYS voltage in the range 0V < VSYS < 1.8V is the expected behavior of the device. There is a soft start function inplemented on the SYS output. In case the device is only powered from VBAT : The device is turned on by pulling /PB_IN low. SYS...
    on Dec 23, 2010

  • Forum Post: TPS65070 How to Enable when Power is Connected to AC pin

    Charles Gervasi
    I have a TPS65070 that is failing to come up on a new board. I have series resistor from all supplies just downstream from the the inductors and capacitors, allowing me to run the supply completely unloaded. I don't know how well it should work completely unloaded, but I am getting zero volts...
    on Jan 15, 2011

  • Forum Post: Re: Troubleshooting Steps for TPS6070

    Daniel Acevedo
    In the case where the supply is to power up when 5V is applied to the AC pin, the pin named PB_IN (which has an internal pull-up to AVDD6) should be left open and pin POWER-ON needs to be pulled high. If the TPS65070 is powered from the BAT pin, PB_IN needs to be tied low to start the converters.
    on Jan 19, 2011
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