UNISONIC TECHNOLOGIES CO., LTD UA7527 Preliminary LINEAR INTEGRATED CIRCUIT POWER FACTOR CONTROLLER DESCRIPTION The UTC UA7527 is a simple and high performance active power factor corrective controller for boost PFC application which operates in the critical conduction mode. The UTC UA7527 is optimized for electronic ballasts, low power and high density power supplies which require minimum board area reduced component count and low power dissipation. Internal R/C filter eliminates the need for an external R/C filter. Special circuitry has also been added to prevent no load runaway conditions. The output drive clamping circuit limits the overshoot of the power MOSFET gate drive despite the supply voltage. This greatly enhances the system reliability. SOP-8 FEATURES * Internal Start-up Timer * Very Precise Adjustable Output Over Voltage Protection * Zero Current Detector * Quadrant Multiplier * Internal R/C Filter Eliminates the Need for an External R/C Filter * Trimmed 1.5% Internal Band Gap Reference * Under Voltage Lockout with 3V of Hysteresis * Totem Pole Output With High State Clamp * Low Start-up and Operating Current ORDERING INFORMATION Ordering Number Lead Free Halogen Free UA7527L-S08-R UA7527G-S08-R UA7527L-S08-T UA7527G-S08-T www.unisonic.com.tw Copyright © 2011 Unisonic Technologies Co., Ltd Package Packing SOP-8 SOP-8 Tape Reel Tube 1 of 6 QW-R114-003.b UA7527 Preliminary LINEAR INTEGRATED CIRCUIT PIN CONFIGURATION PIN DESCRIPTION PIN NO. PIN NAME 1 INV 2 EA_OUT 3 MULT 4 CS 5 6 IDET GND 7 OUT 8 VCC DESCRIPTION The inverting input of the error amplifier. The output of the boost converter should be resistively divided to 2.5V and connected to this pin. The error amplifier output. A feedback compensation network is placed between this pin and the INV pin. Input to the multiplier stage. Full-wave rectified AC voltage is divided into a voltage less than 2V and is connected to this pin. Input of the Pulse-Width Modulation comparator. Current is sensed in the boost stage MOSFET by a resistor in the source lead. An internal R / C filter can filter out any high frequency noise. Input to zero current detection. The IC ground. Gate driver output. This pin provides an output to an external Power MOSFET with peak current of 500mA. The positive supply of the device. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R114-003.b UA7527 Preliminary LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 6 QW-R114-003.b UA7527 Preliminary LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATING (TA=25°C, unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC 30 V Multiplier, Error Amp and Comparator Input Voltages VIN -0.3 ~ 6 V Peak Drive Output Current IOH, IOL ±500 mA Output Clamping Diodes Current VO > VCC or VO < -0.3V lCLAMP ±10 mA Detect Clamping Diodes Current lDET ±10 mA Power Dissipation PD 0.8 W Junction Temperature TJ 150 °C Operating Temperature TOPR -25 ~ 125 °C Storage Temperature TSTG -65 ~ 150 °C 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. TEMPERATURE CHARACTERISTICS (-25°C ≤ TA ≤ 125°C) PARAMETER Temperature Stability for Reference Voltage (VREF) Temperature Stability for Multiplier Gain (K) SYMBOL ∆VREF ∆K/∆T RATINGS 20 -0.2 UNIT mV %/°C ELECTRICAL CHARACTERISTICS (VCC= 14V, -25°C ≤ TA ≤ 125°C, unless otherwise specified.) PARAMETER UNDER VOLTAGE LOCKOUT SECTION Start Threshold Voltage UV lockout Hysteresis SUPPLY CURRENT SECTION Start-up Supply Current Operating Supply Current Operating Current at OVP Dynamic Operating Supply Current ERROR AMPLIFIER SECTION Voltage Feedback Input Threshold Line Regulation Temperature Stability of VREF (Note 1) Input Bias Current Output Current Output Upper Clamp Voltage (Note 2) Output Lower Clamp Voltage (Note 3) Large Signal Open Loop gain (Note 4) Power Supply Rejection Ratio (Note 5) Unity Gain Bandwidth (Note 6) Slew Rate (Note7) MULTIPLIER SECTION Input Bias Current (Pin3) M1 Input Voltage Range (Pin3) M2 Input Voltage Range (Pin2) Multiplier Gain (Note8) Maximum Multiplier Output Voltage Multiplier Gain Stability (Note 9) SYMBOL VTH(ST) HY(ST) IST ICC ICC(OVP) IDCC VREF ∆VREF1 ∆VREF3 IB(EA) ISOURCE ISINK VEAO(H) VEAO(L) GV PSRR GBW SR IB (M) ∆VM1 ∆VM2 K VCC Increasing VCC = VTH(ST) -0.2V Output not switching VINV = 3V 50kHz, CI = 1nF IREF = 0mA, TA = 25°C -25 ≤ TA ≤ 125°C 14V ≤ VCC ≤ 25V -25 ≤ TA ≤ 125°C VM2 = 4V VM2 = 4V ISOURCE = 0.1mA ISINK = 0.1mA 14V ≤ VCC ≤ 25V VM1 = 1V, VM2 = 3.5V VOMAX(M) VINV =0V, VM1 = 4V ∆K/∆T -25 ≤ TA ≤ 125°C UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TEST CONDITIONS MIN TYP MAX UNIT 10.5 2 11.5 3 12.5 4 V V 10 60 3 1.7 4 100 6 4 8 uA mA mA mA 2.465 2.44 2.5 2.5 0.1 20 2.535 2.56 10 V V mV mV uA mA mA V V dB dB MHz V/us -0.5 -2 2 60 60 -0.5 0 VREF 0.36 1.65 0.5 -4 4 6 2.25 80 80 1 0.6 0.44 1.8 -0.2 0.5 3.8 VREF+2.5 0.52 1.95 uA V V 1/V V %/°C 4 of 6 QW-R114-003.b UA7527 Preliminary LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS(Cont.) PARAMETER SYMBOL TEST CONDITIONS MIN CURRENT SENSE SECTION Input Offset Voltage (Note 8) VIO(CS) VM1=0V, VM2 = 2.2V -10 Input Bias Current IB(CS) 0V ≤ VCS ≤ 1.7V -1 Current Sense Delay to Output tD(CS) (Note 11) ZERO CURRENT DETECT SECTION Input Voltage Threshold VTH(DET) VDET Increasing 1.7 Detect Hysteresis HY(DET) 0.2 Input Low Clamp Voltage VCLAMP IDET = -100uA 0.45 Input High Clamp Voltage V CLAMP) IDET = 3mA 6.5 Input Bias Current IB(DET) 1V ≤ VDET ≤ 5V -1 Input High/Low Clamp Diode Current I CLAMP(D) (Note 12) OUTPUT SECTION IO = -10mA 10.5 High VOH Output Voltage Low VOL IO = 10mA Rising Time (Note 13) tR CI = 1nF Falling Time (Note 14) TF CI = 1nF Maximum Output Voltage VOMAX(O) VCC = 20V, IO = 100uA 12 Output Voltage with UVLO Activated VOMIN(O) VCC = 5V , IO = 100uA RESTART TIMER SECTION Restart Time Delay tD(RST) VM1 = 1V, VM2 = 3.5V OVER VOLTAGE PROTECTION SECTION Soft OVP Detecting Current ISOVP 25 Dynamic OVP Detecting Current IDOVP 35 Static OVP Threshold Voltage VOVP VINV = 2.7V 2.1 Notes: 1~14.These parameters, although guaranteed, are not 100% tested in production. Pin4_Thres hold ……(VM1=Vpin3, VM2=Vpin2) Multiplier Gain: K= VM1 × (VM2 − VREF ) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TYP MAX UNIT 3 -0.1 200 10 1 500 mV uA ns 2 0.5 0.75 7.2 -0.1 2.3 0.8 1 7.9 1 ±3 V V V V uA mA 1 200 120 16 1 V V ns ns V V 11 0.8 130 50 14 150 30 40 2.25 us 35 45 2.4 uA uA V 5 of 6 QW-R114-003.b UA7527 Preliminary LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION CIRCUIT 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. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 6 QW-R114-003.b