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  • TI Thinks Resolved

WEBENCH® Tools/TPS61087: Is the output voltage and current range incorrectly constrained by webench design tool?

Prodigy 10 points

Replies: 1

Views: 32

Part Number: TPS61087

Tool/software: WEBENCH® Design Tools

Hello

I need to design a boost converter using TPS61087 that provides 18.5V 250mA from a battery that may have voltage about 2.7V under load. According to TPS61087 datasheet Figure 1 and Figure 2 (Maximum Load Current vs Input Voltage for 650kHz and 1.2MHz) it is possible with fsw=650kHz.

I tried to use webench design tool to calculate the design but it doesn't accept the input parameters (I must lower output current or voltage or increase input voltage). Is that only limitation of the tool that it limits input parameters using worst case (1.2MHz) duty cycle limit? Is is safe to design the converter working at 650kHz (without webench), or I miss something?

  • Dear Sir,

    It is OK for the TPS61087 output 18.5V/0.25A at Vin=2.7V condition. The Webench may set some limit according to the 1.2MHz .

    Best Regards,
    Helen

    Boost DC/DC Solution

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