UPS703 Unisonic Technologies, UPS703 Datasheet
UPS703
Related parts for UPS703
UPS703 Summary of contents
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... Over Voltage Protection * Leading Edge Blanking * Cycle-by-Cycle Current Limiting * Under Voltage Lock Out * Short Circuit Protection ORDERING INFORMATION Ordering Number Lead Free Halogen Free UPS703L-D08-T UPS703G-D08-T www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd designed for several special Package DIP-8 LINEAR INTEGRATED CIRCUIT ...
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... UPS703 PIN CONFIGURATION DRAIN GND PIN DESCRIPTION PIN NAME 1 DRAIN Power MOSFET drain 2 V For startup and constant power limit, this pin is pulled to the line input via resistor Supply voltage CC 4 GND Ground 5 SS Soft-start 6 FB Feedback 7 CS Controller current sense input ...
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... UPS703 BLOCK DIAGRAM Notes: OLP (Over Load Protection) OVP (Over Voltage Protection) OTP (Over Temperature Protection) OCP (Over Current Protection) UVLO (Under Voltage Latch-Out) LEB (Led Edge Blanking) SS (Soft Start) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw LINEAR INTEGRATED CIRCUIT QW-R119-015 ...
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... UPS703 ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage Input Voltage to Vin Pin Input Voltage to FB Pin Input Voltage to CS Pin Junction Temperature Operating Temperature Storage Temperature Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. ...
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... UPS703 ELECTRICAL CHARACTERISTICS(Cont.) PARAMETER CURRENT LIMITING SECTION Peak Current Limitation Threshold Voltage For I =60μA VIN POWER MOS-TRANSISTOR SECTION Drain-Source Breakdown Voltage Turn-On Voltage between Gate and Source Drain-Source Diode Continuous Source Current Static Drain-Source On-State Resistance Rise Time Fall Time Notes: 1. Pulse Test: Pulse width≤ ...
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... UPS703 FUNCTIONAL DESCRIPTION The internal reference voltages and bias circuit work at V (1) Soft-Start When every IC power on, driver output duty cycle will be decided by voltage V on current sense resistor at beginning. After V depend on V and V . The relation among Furthermore, soft-start phase should end before V ...
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... UPS703 FUNCTIONAL DESCRIPTION(Cont.) (2) Switch Frequency Set The maximum switch frequency is set to 68kHz. Switch frequency is modulated by output power P operating load or light load condition, most of the power dissipation in a switching mode power supply is from switching loss on the MOSFET transistor, the core loss of the transformer and the loss on the subber circuit. The magnitude of power loss is in proportion to the number of switching events within a fixed period of time. So lower switch frequency at lower load, which more and more improve IC’ ...
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... UPS703 FUNCTIONAL DESCRIPTION(Cont.) (5) Constant Output Power Limit When the SENSE voltage, across the sense resistor R GATE drive will be turned off after a small propagation delay t current proportional to t ×V /Lp. Since the propagation delay is nearly constant regardless of the input line voltage Higher input line voltage will result in a larger additional current and hence the output power limit is also higher IN than that under low input line voltage ...
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... UPS703 FUNCTIONAL DESCRIPTION(Cont.) FIG.8 OLP test circuit OTP OTP will shut down driver when junction temperature T (7) Driver Output Section The driver-stage drives the gate of the MOSFET and is optimized to minimize EMI and to provide high circuit efficiency. This is done by reducing the switch on slope when reaching the MOSFET threshold. This is achieved by a slope control of the rising edge at the driver’ ...
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... NEUT R15 IC1 DRAIN VIN 8 DRAIN GND Table1. Components reference description for UPS703 application circuit DESIGNATOR PART TYPE C1 22μF C2 102P C3 22μF C4 470μF C5 470μF C6 104P C7 103P C8 102 C9 104 C10 220μF UNISONIC TECHNOLOGIES CO., LTD www ...
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... UPS703 TYPICAL CHARACTERISTICS Feedback Voltage During Loadjump From 10 100% Load (V 12V 10V -2V 0 2000 Time (400μs/div) Startup With Full Load Condition at V =90V, V and 10V 5V V OUT Time (10ms/div) Startup Behavior At Nominal Load ...
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... UPS703 TYPICAL CHARACTERISTICS(Cont.) 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 ...