• LTC4089-5 operational state diagram

    Hello. Testing the LTC4089-5 some questions have arised related to timer. The timer period is defined by external resistor and capacitor. But the algorithm also uses half and quarter periods.
    We can monitor the impulses on CHRG pin (#8) with a width of…

  • LTC4089 HVEN add a 50HZ PWM

    Dear Sir,

    Our customer using LTC4089 and add a modulation on HVEN input with a 50/60HZ,Could you please help check is any affect its reliability and will not lead to any safety issue in this applicaiton? Thanks.

  • LTC4089(-5) typical application

    In typical application, 1k resistor is connected between HVPR(pin 7) and OUT(pin 13).If high voltage is

    present, the HVPR goes low( near to GND) and opens external p-fet to drive high voltage (vbat+0.3V/5V)

    to OUT. At same time, ca 3...5 mA  are going…

  • LTC4089 vs, LTC4090

    The LTC4089 and LTC4090 are very similar parts. I am working on a new design and could use either part. Do you have any recommendations on choosing one or the other? Is one part preferable in regards to lifecycle (time till EOL)?

    Thanks!

  • RE: LTC4089-5 cost reduction

    Hi,

    We are doing some cost reduction studies for our product. face On the power management circuitry we don't need the LTC4089-5 chip's high voltage input. All power is taken from USB Vbus voltage. 

    So, if the high voltage input is not…

  • LTC4089 automatic switchover from USB to wall adapter using FTDI FT231XS

    Hi,

    I am working on the design of device that can be charged either from USB, a 5V wall adapter or a 24V input and selected the LTC4089 to do the job. In addition, the device features a FT231XS USB to serial converter. The FT231XS has a few configurable…

  • LTC4089-3 Current limit for "IN" input.

    My question is similar to "LTC4089-5 cost reduction",  I will not be using the HVIN, but my "USB" input is not limited to the typical 500 mA from USB ports.

    Can you please confirm it possible to increase the charge current to 750 m…

  • TAGS LIST: Power Management

    LTM8045
    LTM8049
    LTM4651
    LTM4661
    LTM4686
    LTM4676
    LTM4686-1
    LTM4676A
    LTM4675
    LTM4677
    LTM4678
    LTM8062
    LTM8061
    LTM8052
    LTM8026
    LTM8056
    LTM8064
    LTM8054
    LTM8055
    LTM4600
    LTM4600HV
    LTM4608A
    LTM4604A
    LTM8032