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USR1101 Datasheet(PDF) 5 Page - Unisonic Technologies |
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USR1101 Datasheet(HTML) 5 Page - Unisonic Technologies |
5 / 5 page ![]() USR1101 Preliminary LINEAR INTEGRATED CIRCUIT UNISONICTECHNOLOGIESCO.,LTD 5 of 5 www.unisonic.com.tw QW-R103-062.b APPLICATION INFORMATION OCP Sense the low-side MOSFET’s RDS(ON) to set over-current trip point. Connecting a resistor (ROCSET) from this pin to the source of the upper MOSFET and the drain of the lower MOSFET sets the over-current trip point. ROCSET, an internal 40μA current source, and the lower MOSFET on resistance, RDS(ON), set the converter over-current trip point (IOCSET) according to the following equation: MOSFET lower the of R 0.4V R A 40 I DS(ON) OCSET OCSET Shutdown Pulling low the OPS pin by a small single transistor can shutdown the UTC USR1101 PWM controller as shown in typical application circuit. TYPICAL APPLICATION CIRCUIT BOOT COUT 1000µF×3 M1 C2 0.1µF C3 1µF C4 470µF VIN +5V~+12V D1 1N4148 C1 1µF R1 10 L1 3µH VOUT R2 32 R3 68 R4 200-1k C5 0.1-0.33µF 1 5 2 8 67 3 4 VCC FB GND LGATE OPS NC UGATE Disable ROCSET M2 UTC USR1101 UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. |
Similar Part No. - USR1101_15 |
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Similar Description - USR1101_15 |
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