UPS702 Unisonic Technologies, UPS702 Datasheet
UPS702
Related parts for UPS702
UPS702 Summary of contents
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... HIGH PERFORMANCE CURRENT MODE POWER SWITCH DESCRIPTION The UTC UPS702 is designed to provide several special enhancements to satisfy the needs, for example, Power-Saving mode for low standby power (<0.3W), Frequency Hopping , Constant Output Power Limiting , Slope Compensation ,Over Current Protection (OCP), Over Voltage Protection (OVP), Over Load Protection (OLP), Under Voltage Lock Out (UVLO), Short Circuit Protection (SCP) , Over Temperature Protection (OTP) etc ...
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... UPS702 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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... UPS702 BLOCK DIAGRAM OVP UVLO Reference voltage Logic Control Soft Start SS 5 Delay Time Burstmode OTP OLP FB 6 PWM COMP Slope Compensation 4 GND Notes: OLP (Over Load Protection) OVP (Over Voltage Protection) OTP (Over Temperature Protection) OCP (Over Current Protection) ...
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... UPS702 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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... UPS702 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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... UPS702 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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... UPS702 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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... UPS702 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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... UPS702 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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... UPS702 TYPICAL APPLICATION CIRCUIT Table1. Components reference description for UPS702 application circuit DESIGNATOR PART TYPE C1 22μF C2 0.001μF C3 22μF C4 330μF C5 330μF C6 0.1μF C7 0.01μF C8 0.001μF C9 0.1μF C10 220μF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw LINEAR INTEGRATED CIRCUIT FIG.10 UPS702 Typical Application Circuit ...
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... UPS702 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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... UPS702 TYPICAL CHARACTERISTICS(Cont.) Frequency vs. Output Power =90V Output Power, P OUT 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 ...