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  • LM5157-Q1: LM5157-Q1 can not provide enough current

    Part Number: LM5157-Q1 Hey all, I have fabricated a PCB with the LM5157-Q1 see the attached schematic. This schematic was review and blessed by TI in another thread. It is working fine at a 2.841A load but when increased to a 3.055A load the regulator…

  • LM5157-Q1: LM5157QRTERQ1 schematic review

    TI Thinks Resolved
    Part Number: LM5157-Q1 Other Parts Discussed in Thread: LM5157 Please help review this schematic and provide feedback for LM5157QRTERQ1 SMPS - set up as a boost controller. Input voltage (PBUS) is provided by a 3S battery = 8.1V to 12.6V Output voltage…

  • LM5157-Q1: PGOOD max. voltage

    Part Number: LM5157-Q1 Other Parts Discussed in Thread: LM5157 Hi TI Team I use the LM5157 for a flyback converter design. To start the converter I use my input voltage (18V-32V) and later if every thing's fine I want to switch to my AUX/FB supply. To make…

  • LM5157-Q1: UVLO pin unused

    Part Number: LM5157-Q1 Other Parts Discussed in Thread: LM5157 Hi team, In order to save standby leakage current from resistor divider, I would not use UVLO feature and just connect to BIAS pin. Is there any concern or care about if I don't use UVLO feature…

  • LM5157-Q1: SIMPLIS model or equivalent part model

    Part Number: LM5157-Q1 Hi , Is there a SIMPLIS model for LM5157-q1 or for any other equivalent part to be used as DCM flyback? Simple pwm switcher is also ok. My main purpose is to use the MDM tool to design a transformer for my circuit design.
    • Answered

  • LM5157-Q1: EMI performance curves as flyback

    Resolved
    Part Number: LM5157-Q1 Other Parts Discussed in Thread: LM5157EVM-FLY I am trying to design a flyback converter using LM5157-Q1 Is there an EMI performance report of this IC used as a flyback? My specs are: Input: 8 to 18V Output:+15,-8,+15,-8,+15,-8V…
    • Resolved

  • LM5157-Q1: Maximum voltage in/out

    TI Thinks Resolved
    Part Number: LM5157-Q1 Other Parts Discussed in Thread: LM5158-Q1 , LM5156-Q1 , LM5157 , LM5158 , LM5156 , LM5156EVM-BST , LM5158EVM-BST Hi Team, Our customer is considering using LM5157-Q1 in his project and would like to use an EVM to evaluate the device.…
    • Answered

  • LM5157-Q1: Output flicker

    Resolved
    Part Number: LM5157-Q1 Hello, I have problem with flickering output bellow for input voltages bellow 14V. Design should be operated 12-14V, and deliver 32V 1.8A for LED array. As more as you go bellow 14V (13.5-13-12.5-12) it is just get more frequent…
    • Resolved

  • LM5157-Q1: PSpice Avg Model SEPIC simulation

    TI Thinks Resolved
    Part Number: LM5157-Q1 Other Parts Discussed in Thread: LM5157 Hi All, I am having issue getting the LM5157 PSpice AVG model to output proper bode plots when setup as a SEPIC with VIN > VOUT. It seems like it only works in "boost" mode. Within…

  • LM5157-Q1: Substitute recommendation request

    TI Thinks Resolved
    Part Number: LM5157-Q1 Other Parts Discussed in Thread: TPS61170-Q1 , LM5158-Q1 , LM5158 , TPS55332-Q1 Hi, TI Support Team I have received a request to recommend replacement parts for the following parts from a customer. Please refer to the detailed spec…

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