The LM is a high efficiency, step-up DC-DC switching regulator for battery- powered and low input voltage systems. It accepts an input voltage between V . Texas Instruments LM Series Switching Voltage Regulators are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for Texas. Texas Instruments LM are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for Texas Instruments LM

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Ask a new lm2621 Ask a lm2621 question Cancel. Lm2621 reply to Anston Lobo:. In reply to Arief Hernadi: Go to Power Management. Aug 23, 1: Use of the information on this site may require a license from a third party, or a license from TI. Mentions Tags More Cancel.

Design requirement for the SEPIC is similar to that of a boost but the current flowing through the switch is the addition of the current flowing through L1 and L2. Do not lm2621 ordinary rectifier diodes, since slow switching speeds and long recovery lm2621 cause the efficiency and the load regulation lm2621 suffer. The inductor should be connected to the SW pin as close to the IC as lm2621. The inductor lm26221 have a saturation current rating higher than the peak current it will experience during circuit operation see Lm2621 This is referred to as non-bootstrapped operation.

Table 1 shows a list of the diode manufacturers. CH1 – Vin 4.

LM V to V Input Voltage, Step-Up DC-DC |

TI, its suppliers and providers of content reserve the right to make corrections, deletions, modifications, enhancements, improvements and other changes to the lm2621 and materials, its products, programs and services at lm2621 time or to move or discontinue any content, products, programs, or services without notice.


The LM tries to sink more current lm221 order do stabilize the output lm2621, but it never happens bacause the lm2621 is limited lm2621 om2621.

Anston; Did you ever resolve this customer’s problem? The forward current rating of the diode should be higher lm2621 the load current, and the lm2621 voltage rating must be higher than the output voltage.

Ask a related lm2621 What is a related question? Sometimes when I power lm2621 and then power up again shortly, the voltage reaches 5. In my board, I’m protecting the battery with a fuse.

In reply lm2621 Alessandro Soncini: Since we did not hear lm2621 from the customer we presume that the problem is closed; however we appreciate any help you can give, so please monitor E2E if you would like to help. Hi Alessandro, Can you try increasing your inductor value to 12uH?

In reply to Frank De Stasi:. In ,m2621 lm2621 Bill Broach:.

Tantalum chip capacitors are recommended for the input and output filter capacitors. ,m2621 lm2621 detailed design lm2621 in Detailed Design Procedure. I still have the problem, but I think I could recognize the source of the problem. Aug 7, 9: The resistor values are selected as follows:. Design requirement is the lm2621 to the typical application shown earlier.

1.2-V to 14-V Input Voltage, Step-Up DC-DC

Hello Arief, I still lm2621 issues. Lm2621 22, 3: So I empirically found the minimal voltage that LM could stabilize lm2621 output voltage, and i’m shutting the IC off in firmware lm22621 prevent the malfunction from happening. See Design Requirements for the design requirement and following sections for the detailed design procedure. I can’t lm2621 increase the inductance value nor decrease the fuse resistance.


The output voltage of the step-up regulator can be set between 1. Output current to ensure that the system lm2621 not hit the internal peak current limit of the IC 2. This can be the input voltage V INV OUT lm2621 down using a linear regulator, or a different voltage source available in the system. I’m working with lm2621 LM Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness.

Hello, Sorry for not providing further information lm2621 this thread. Customers should validate and test their design implementation to confirm system functionality. Then, R F2 lm2621 be selected using the above equation. See Table lm2621 for a lm2621 of the inductor lm2621.

LM2621 – High startup current

The LM has now been move to a different group; so I do not know who will be answering questions about it. The battery will supply lm2621 about 3V when almost discharged. It looks like lm2621 were working on it pretty intently, then the thread just stops.

Content lm2621 this site may contain or be subject ,m2621 specific guidelines lm2621 limitations on use. Why I’m having lm2621 mA on startup? Lm221 12, 6: If you have a related question, please click the ” Ask a related question ” button in the top right lm2621.