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UC2902 Fiches technique(PDF) 1 Page - Texas Instruments |
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UC2902 Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 10 page UC2902 UC3902 SLUS232E − DECEMBER 19, 2002 − REVISED JULY 2011 LOAD SHARE CONTROLLER 1 www.ti.com FEATURES D 2.7-V to 20-V Operation D 8-Pin Package D Requires Minimum Number of External Components D Compatible with Existing Power Supply Designs Incorporating Remote Output Voltage Sensin D Differential Share Bus D Precision Current Sense Amplifier (40 Gain) D UVLO (Undervoltage Lockout) Circuitry D User Programmable Share Loop Compensation APPLICATIONS D Paralelled Power Supplies DESCRIPTION The UC3902 load share controller is an 8-pin device that balances the current drawn from independent, paralleled power supplies. Load sharing is accomplished by adjusting each supplies’ output current to a level proportional to the voltage on a share bus. The master power supply, which is automatically designated as the supply that regulates to the highest voltage, drives the share bus with a voltage proportional to its output current. The UC3902 trims the output voltage of the other paralleled supplies so that they each support their share of the load current. Typically, each supply is designed for the same current level although that is not necessary for use with the UC3902. By appropriately scaling the current sense resistor, supplies with different output current capability can be paralleled with each supply providing the same percentage of their output current capability for a particular load. UDG−01141 1 3 2 4 8 6 7 5 + − R 40R + − ADJ AMPLIFIER BIAS UVLO + − + − + − SHARE SENSE AMPLIFIER SHARE DRIVE AMPLIFIER 2.3 V 35 mV + 0.6 V + CURRENT SENSE AMPLIFIER ERROR AMPLIFIER GND SENSE ADJ ADJR VCC SHARE+ SHARE− COMP PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2002 − 2008, Texas Instruments Incorporated |
Numéro de pièce similaire - UC2902 |
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Description similaire - UC2902 |
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