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TPS40210-EP датащи(PDF) 11 Page - Texas Instruments |
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TPS40210-EP датащи(HTML) 11 Page - Texas Instruments |
11 / 44 page + + Soft Start and Overcurrent 5 FB 4 COMP 3 DIS/EN 700 mV LDO PWM Logic 2 SS 1 RC Oscillator and Slope Compensation UVLO Driver 9 BP 10 VDD 8 GDRV 6 GND 7 ISNS + Gain = 6 + 150 mV LEB OC Fault OC Fault UDG-07107 Enable E/A E/A SS Ref TPS40210-EP www.ti.com SLUSC89 – NOVEMBER 2015 7 Detailed Description 7.1 Overview The TPS40210-EP is a peak current-mode control low-side controller with a built in 400-mA gate driver designed to drive N-channel MOSFETs at a fixed frequency. The frequency is adjustable from 35 kHz to 1000 kHz. Small size combined with complete functionality makes the part both versatile and easy to use. The controller uses a low-value current-sensing resistor in series with the power MOSFET's source connection to detect switching current. When the voltage drop across this resistor exceeds 150 mV, the part enters an hiccup fault mode with a time period set by the external soft-start capacitor. The TPS40210-EP uses voltage feedback to an error amplifier that is biased by a precision 700-mV reference. Internal slope compensation eliminates the characteristic sub-harmonic instability of peak current mode control with duty cycles of 50% or greater. The TPS40210-EP also incorporates a soft-start feature where the output follows a slowly rising soft-start voltage, preventing output-voltage overshoot. The DIS/EN disables the TPS40210-EP putting it in a low quiescent current shutdown mode. 7.2 Functional Block Diagram Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: TPS40210-EP |
Аналогичный номер детали - TPS40210-EP_15 |
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Аналогичное описание - TPS40210-EP_15 |
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