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TPS61291DRVT Fiches technique(PDF) 7 Page - Texas Instruments |
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TPS61291DRVT Fiches technique(HTML) 7 Page - Texas Instruments |
7 / 25 page P VOUT EN/BYP SW Rectifying Switch Overvoltage Protection Bypass Switch Startup Circuit VIN Control Logic Thermal Shutdown Undervoltage Lockout Driver GND Main Switch Vref integrated FB divider network with disconnect BYP/EN VSEL Bypass Switch Control VOUT VIN Current Sense Voltage Error Amplifier N N Reference Vref VIN TPS61291 www.ti.com SLVSBX9A – SEPTEMBER 2014 – REVISED SEPTEMBER 2014 7 Detailed Description 7.1 Overview The TPS61291 provides two operating modes: high efficiency boost mode to generate an output voltage higher than the input voltage and bypass mode, which connects the output of the device directly to the input. 7.2 Functional Block Diagram 7.3 Feature Description 7.3.1 Bypass / Boost Mode Operation EN/BYP The EN/BYP pin selects the operating mode of the device. With the EN/BYP pin pulled low, the device operates in bypass mode. With a high level on the EN/BYP pin, the device operates as a boost converter. The EN/BYP pin is usually controlled by an I/O pin of a MCU, powered from the output of the TPS61291 and should not be left floating. See Figure 8. See also sections Boost Mode Operation and Bypass Mode Operation for more detailed descriptions. Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: TPS61291 |
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