UPS703

UPS703 ETL | Alldatasheet

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UNISONIC TECHNOLOGIES CO., LTD UPS703 LINEAR INTEGRATED CIRCUIT www.unisonic.com.tw 1 of 12 Copyright © 2011 Unisonic Technologies Co., Ltd QW-R119-015.C HIGH PERFORMANCE CURRENT MODE POWER SWITCH „ DESCRIPTION The UTC UPS703 is designed for several special enhancements to satisfy the dema nds, 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. IC will be shutdown or can auto-restart in relative situations. „ FEATURE * Low Startup Current (About 22μA) * Fixed Switching Frequency(Norm. is 68KHz) * Frequency Hopping For Improved EMI Performance. * Lower Than 0.3W Standby Power Design * Linearly Decreasing Frequency to 26KHz During Light Load * Soft Start * Internal Slope Compensation * Constant Power Limiting For Universal AC Input Range * Gate Output Maximum Voltage Clamp(15V) * Max Duty Cycle 74% * Over Temperature Protection * Overload Protection * Over Voltage Protection * Leading Edge Blanking * Cycle-by-Cycle Current Limiting * Under Voltage Lock Out * Short Circuit Protection DIP-8 „ ORDERING INFORMATION Ordering Number Lead Free Halogen Free Package Packing UPS703L-D08-T UPS703G-D08-T DIP-8 Tube

UPS703 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 2 of 12 www.unisonic.com.tw QW-R119-015.C „ PIN CONFIGURATION

1 DRAIN

„ PIN DESCRIPTION PIN NAME FUNCTION

1 DRAIN Power MOSFET drain

2 V IN For startup and constant power limit, this pin is pulled to the line input via resistor

3 V CC Supply voltage

4 GND Ground

5 SS Soft-start

6 FB Feedback

7 CS Controller current sense input

8 DRAIN Power MOSFET drain

UPS703 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 3 of 12 www.unisonic.com.tw QW-R119-015.C „ 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)

UPS703 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 4 of 12 www.unisonic.com.tw QW-R119-015.C „ ABSOLUTE MAXIMUM RATINGS (Ta＝25°C, unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Supply Voltage V CC 30 V Input Voltage to Vin Pin Vin 30 V Input Voltage to FB Pin V FB -0.3 ~ 6.2 V Input Voltage to CS Pin V CS -0.3 ~ 2.8 V Junction Temperature T J 150 °C Operating Temperature T OPR -40 ~ +125 °C Storage Temperature T STG -50 ~ +150 °C Note: Absolute maximum ratings are those values be yond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. „ RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL RATINGS UNIT Supply Voltage V CC 8.6 ~ 22 V „ ELECTRICAL CHARACTERISTICS (Ta＝25°C, VCC=15V, unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT SUPPLY SECTION Start Up Current I STR V CC = VCC(ON)-0.1V 22 45 μA IOFF V SS = 0, IFB = 0 7 9 mA Supply Current with Switch ION V SS = 4.8V, IFB = 0 7 9 mA UNDER-VOLTAGE LOCKOUT SECTION Start Threshold Voltage V THD(ON) 13.5 14.2 15 V Min. Operating Voltage V CC(MIN) 7.5 8.2 9 V Hysteresis V CC(HY) 6 V INTERNAL VOLTAGE REFERENCE Reference Voltage V REF measured at pin V FB 6.3 6.5 6.7 V CONTROL SECTION VMIN 0.5 V VFB Operating Level VMAX 4.4 V Burst-Mode Out FB Voltage V FB(OUT) V CS =0 1.7 V Reduce-Frequency end FB Voltage V FB(END) V CS =0 1.6 V Burst-Mode Enter FB Voltage V FB(IN) V CS =0 1.5 V Normal V FB = 4V 61 68 75 kHzSwitch Frequency Power-Saving F(SW) Before enter burst mode 20 40 kHz DMAX V FB=4.4V, VCS =0 68 74 80 % Duty Cycle DMIN V FB<0.5V 0 % Frequency Hopping F J(SW) ±1.5 ±3 ±4.5 kHz Frequency Variation VS VCC Deviation F DV V CC=10 to 20V 5 % Frequency Variation VS Temperature Deviation FDT T=-40 to 105°C 5 % Feedback Resistor R FB V FB=0V 16 21 26 k Ω Soft-Start Time T SS C SS=0.47μF 9.9 11.2 12.6 ms PROTECTION SECTION VOVP1 V SS<3.5V,VFB>5V 19 V OVP Threshold VOVP2 V SS=4.8V, VFB=3V 28 V OLP Threshold V FB(OLP) V CS=0, SS OPEN 4.7 4.9 5.1 V Delay Time Of OLP T D-OLP C SS=0.47μF 55 62 70 ms OTP Threshold T (THR) 120 135 150 °C OVP Disable Threshold V SS(DEACT) V FB>5V, VCC = 22V 3.9 4.1 4.3 V OLP Enable Threshold V SS(ACT) V FB>5V 5.1 5.4 5.7 V

UPS703 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 5 of 12 www.unisonic.com.tw QW-R119-015.C „ ELECTRICAL CHARACTERISTICS(Cont.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT CURRENT LIMITING SECTION Peak Current Limitation V CS V FB=4.4V 0.86 1 V Threshold Voltage For IVIN =60μA V SENSE-L I VIN=60μA 0.77 V POWER MOS-TRANSISTOR SECTION Drain-Source Breakdown Voltage V DSS V GS=0V, ID=250μA 700 V Turn-On Voltage between Gate and Source V TH V DS=VGS, ID=250μA 2 4 V Drain-Source Diode Continuous Source Current IS 3 A Static Drain-Source On-State Resistance R DS(ON) V GS=10V,ID=1.5A 2.8 4 Ω Rise Time t R 30 70 ns Fall Time t F VDD =30V, ID =1.0A RG=25Ω (Note 1,2) 30 70 ns Notes: 1. Pulse Test: Pulse width≤300μs, Duty cycle≤2% 2. Essentially independent of operating temperature

UPS703 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 6 of 12 www.unisonic.com.tw QW-R119-015.C „ FUNCTIONAL DESCRIPTION The internal reference voltages and bias circuit work at VCC> VTHD (ON), and shutdown at VCC<VCC (MIN). (1) Soft-Start When every IC power on, driver output duty cycle will be decided by voltage V SS on soft-start capacitor and V CS on current sense resistor at beginning. After V SS reach 4.2V, the whole soft-star t phase end, and driver duty cycle depend on VFB and VCS. The relation among VSS, VFB and VOUT as followed FIG.3. Furthermore, soft-start phase should end before V CC reach VCC (MIN) during VCC power on. Otherwise, if soft-start phase remain not end before VCC reach VCC (MIN) during VCC power on, IC will enter auto-restart phase and not set up VOUT. So the value of CSS should be between 0.1μFand 4.7μF. Finally soft-start also set OVP1 active phase. OVP1 active phase between 0 and V SS(DEACT), OVP1 will not be sensed after V SS reach V SS(DEACT).The Soft-start phase T SS：TSS = 23.8×C SS (ms) (Example: C SS=0.47μF, then t VOUT VFB t t Driver 4.8V TSTRAT-UP VSS t 4.2V TSOFT-START Fig.3 Soft-start phase

UPS703 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 7 of 12 www.unisonic.com.tw QW-R119-015.C „ FUNCTIONAL DESCRIPTION(Cont.) (2) Switch Frequency Set The maximum switch frequency is set to 68kHz. Switch frequency is modulated by output power P OUT during IC operating. At no load or light load cond ition, most of the power dissipation in a switching mode power supply is from switching loss on the MOSFET transisto r, 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 sw itching events within a fixed period of time. So lower switch frequency at lower load, which more and more improve IC’s efficiency at light load. At from no load to light load condition, The IC will operate at from Burst mode to Reducing Frequency Mode. The relation curve between fSW and POUT/POUT (MAX) as followed FIG.4. fsw(kHz) FIG.4 The relation curve between fSW and relative output power POUT/ POUT (MAX) (3) Internal Synchronized Slope Compensation Built-in slope compensation circuit adds voltage ra mp onto the current sens e input voltage for PWM generation, this greatly improves t he close loop stability at CCM and prevents the sub-harmonic oscillation and thus reduces the output ripple voltage. (4) Frequency Hopping For EMI Improvement The Frequency hopping is implemented in the IC; there are two oscillators built-in the IC. The first oscillator is to set the normal switching frequency; the switching frequ ency is modulated with a period signal generated by the 2nd oscillator. The relation between the first oscillator and the 2nd oscillator as followed FIG.5. So the tone energy is evenly spread out, the spread spectrum minimizes the conduction band EMI and therefore eases the system design in meeting stringent EMI requirement. t(ms) FSW_MAX Fosc THopping (kHz) FSW_MIN FSW_TYP FIG.5 Frequency Hopping

UPS703 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 8 of 12 www.unisonic.com.tw QW-R119-015.C „ FUNCTIONAL DESCRIPTION(Cont.) (5) Constant Output Power Limit When the SENSE voltage, across the sense resistor RS, reaches the threshold voltage, around 0.8V, the output GATE drive will be turned off after a small propagation delay t D. This propagation delay will introduce an additional current proportional to t D×VIN/Lp. Since the propagation dela y is nearly constant regardl ess of the input line voltage VIN. Higher input line voltage will result in a larger additional current and hence the output power limit is also higher than that under low input line vo ltage. To compensate this variation for wi de AC input range, the threshold voltage is adjusted by the V IN current. Since V IN pin is connected to the rectified i nput line voltage through a resistor R VIN, a higher line voltage will generate higher V IN current into the V IN pin. The threshold volt age is decreased if the V IN current is increased. Smaller threshold voltage, forces the output GATE drive to termi nate earlier, thus reduce the total PWM turn-on time and make the output power equal to that of low line input. This proprietary internal compensation ensures a constant output power limit for wide AC input voltage from 90VAC to 264VAC. (6) Protection section The IC takes on more protection functions such as OLP, OVP and OTP etc. In case of those failure modes for continual blanking time, the driv er is shut down. At the same time, IC enters auto-restart, V CC power on and driver is reset after VCC power on again. OLP After soft-start phase end, IC will shutdown driver if over load state occurs for continual T D-OLP. OLP function will OVP There are two kinds of OVP circuits, the first OVP function are enabled only when V SS<VSS (DEACT) & VFB>VFB (OLP) during soft-start phase. During above condition, driver will be shutdown if over voltage state occurs (VCC>VOVP1) for continual a blanking time. The first OVP function will not inactive after soft-start phase. The second OVP will shutdown the switching of the power MOSFET whenever VCC>VOVP2. The first OVP case as followed FIG.7. The test circuit as followed FIG.9. FIG.6 OLP case FIG.7 OVP case

UPS703 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 9 of 12 www.unisonic.com.tw QW-R119-015.C „ FUNCTIONAL DESCRIPTION(Cont.) FIG.8 OLP test circuit FIG.9 OVP test circuit OTP OTP will shut down driver when junction temperature TJ>T (THR) for continual a blanking time. (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’s output. The output driver is clamped by an internal 15V Zener diode in order to protect power MOSFET transistors against undesirable gate over voltage. (8) Inside power switch MOS transistor Specific power MOS transistor parameter is as “POWER MOS TRANSISTOR SECTION” in ELECTRICAL CHARACTERISTICS table.

UPS703 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 10 of 12 www.unisonic.com.tw QW-R119-015.C „ TYPICAL APPLICATION CIRCUIT LINE NEUT R13 VIN SS DRAINVCC DRAIN FB 3IC1 12V/1A GND ZNR1 BD1 YC3 R10C9 IC3 XC1 R4 IC2 R2 D2 C4 C10 CSGND R15 4- +1 LD2 12W R12 R14R9 R11 FIG.10 UPS703 Typical Application Circuit Table1. Components reference description for UPS703 application circuit DESIGNATOR PART TYPE DESIGNATOR PART TYPE DESIGNATOR PART TYPE C1 22 μF R1 1.3 Ω D1 FR107 C2 102P R2 68K Ω D2 SB3100 C3 22 μF R3 2.2M Ω D3 US1D C4 470 μF R4 2.2M Ω IC1 UPS703 C5 470 μF R5 1M Ω IC2 PC-817 C6 104P R6 0 Ω IC3 TL431 C7 103P R7 0 Ω T1 EE22 C8 102 R8 15 Ω L1 UU9.8 C9 104 R9 560 Ω L2 2 μH C10 220 μF R10 1K Ω L3 Ring Choke R11 3.9K Ω LD2 LED R12 15K Ω F1 1.0A/250V R13 5.1K Ω ZNR1 7D471K R14 1.8K Ω XC1 154P/275V R15 1.5M Ω~4.0 MΩ BD1 B6S YC3 222

UPS703 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 11 of 12 www.unisonic.com.tw QW-R119-015.C „ TYPICAL CHARACTERISTICS Feedback Voltage During Loadjump From 10% Up To 100% Load (VAC=90V) Feedback Voltage During Loadjump From 10% Up To 100% Load (VAC=264V) Startup With Full Load Condition at VAC=90V, VSS and VOUT Startup With Full Load Condition at VAC=264V, VSS and VOUT Startup Behavior At Nominal Load Condition VAC=90V Startup Behavior At Nominal Load Condition VAC=264V 0 2000 -2V Time (400μs/div) 10V 12V -2V 10V 12V Time (10ms/div) 05 0 1 0 0 10V Time (10ms/div) 0 50 100 Time (4ms/div) 02 0 40 Time (4ms/div) 0 20 40 4000 0 2000 Time (400μs/div) 4000 10V VSS VOUT VSS VFB VSS VOUT

UPS703 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 12 of 12 www.unisonic.com.tw QW-R119-015.C „ TYPICAL CHARACTERISTICS(Cont.) Input Power (W) Frequency(KHz) 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.