UNISONIC TECHNOLOGIES CO., LTD UC3854 Preliminary CMOS IC ENHANCED HIGH POWER FACTOR PREREGULATOR DESCRIPTION The UTC UC3854 provide all the functions necessary for active power factor corrected preregulators. The controller achieves near unity power factor by shaping the AC input line current waveform to correspond to that of AC input line voltage. Average current mode control maintains stable, low distortion sinusoidal line current without the need for slope compensation, unlike peak current mode control. Designed in UTC’s Bipolar process, the UTC UC3854 offers new features such as wide bandwidth, low offset Current Amplifier, a faster responding and improved accuracy enable comparator, a VREF "good" comparator, UVLO threshold options (16/10V for offline, 10.5/10V for startup from an auxiliary 12V regulator), lower startup supply current, and an enhanced multiply/divide circuit. New features like the improved amplifier current sinking capability, amplifier output clamps, and low offset VAC pin reduce the external component count while improving performance. Improved common mode input range of the Multiplier output/Current Amp input allow the designer greater flexibility in choosing a method for current sensing. Unlike its predecessor, the maximum multiplier output current is now clamped to a maximum of 2 * IAC at all times. A 1% 7.5V reference, fixed frequency oscillator, PWM, Voltage Amplifier with softstart, line voltage feedforward (VRMS squarer), input supply voltage clamp, and over current comparator round out the list of features. SOP-16 FEATURES * Controls Boost Preregulator to Near Unity Power Factor * Limits Line Distortion * World-Wide Line Operation * Accurate Power Limiting * Fixed Frequency Average Current Mode Control * High Bandwidth (5MHz), Low Offset Current Amplifier * Integrated Current and Voltage Amp Output Clamps * Multiplier Improvements: Linearity, 500mV VAC Offset (eliminates external resistor), 0-5V Multout Common Mode Range * VREF "GOOD" Comparator * Faster and Improved Accuracy ENABLE Comparator * 300uA Startup Supply Current www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd 1 of 6 QW-R103-082.a UC3854 Preliminary CMOS IC ORDERING INFORMATION Ordering Number UC3854xG-S16-R Package SOP-16 Packing Tape Reel UC3854xG-S16-R (1) Packing Type (1) R: Tape Reel (2) Package Type (2) S16: SOP-16 (3) Green Package (3) G: Halogen Free and Lead Free (4) VCC Turn-On/Off (4) refer to ELECTRICAL CHARACTERISTICS MARKING UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R103-082.a UC3854 Preliminary PIN CONFIGURATION PIN DESCRIPTION PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PIN NAME GND PKLMT CA OUT ISNESE Mult OUT IAC VA OUT VRMS VREF ENA VSNESE RSET SS CT VCC GT Drv CMOS IC DESCRIPTION Ground. All voltage are measured with respect to GND . Peak Limit. The threshold for PKLMT is 0V. Current Error Amplifier Output. Current Sense Minus. The negative input to the current amplifier. Multiplier/Divider Output. Multiplier output and non-inverting input connected together Analog Input AC Current. Voltage Error Amplifier Output. RMS Line Voltage. Voltage Reference Output. Enable. A logic input, set “H” active. Voltage Error Amplifier Inverting Input. Oscillator Charging Current. Soft Start. Oscillator Timing Capacitor. Positive supply voltage. Gate Driver. BLOCK DIAGRAM VA OUT 7 VCC Mult CA PK OUT OUT LMT 5 3 2 RFE 9 7.5V REF (A) 16V/10V (B) 10.5V/10V ENA 10 7.2V 2.65V/2.15V 3V A IM= C IAC 6 VRMS 8 SS 13 15 VCC A VSENSE 11 X2 S 14µA 16 GT Drv Q 20V OSCILLATOR 1 GND 4 ISNESE UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw R R B C 14 CT 12 RSET 3 of 6 QW-R103-082.a UC3854 Preliminary CMOS IC ABSOLUTE MAXIMUM RATING PARAMETER RATINGS UNIT 22 V Continuous 0.5 A GT Drv Current IOUT 50% Duty Cycle 1.5 A VSENSE, VRMS 11 V ISENSE, Mult Out 11 V Input Voltage VIN PKLMT 5 V RSET, IAC PKLMT, ENA 10 mA Power Dissipation PD 1 W Storage Temperature TSTG -65~+150 °C Notes: 1. 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. 2. All voltages with respect to Gnd (Pin 1) 3. All currents are positive into the specified terminal Supply Voltage SYMBOL VCC ELECTRICAL CHARACTERISTICS Unless otherwise stated, VCC=18V, RT=8.2k, CT=1.5nF, PKLMT=1V, VRMS=1.5V, IAC=100uA, I=0V, CA Out=3.5V, VA Out=5V, VSENSE=3V, 0°C <TA<70°C, TA=TJ. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Overall Supply Current, Off ICC(On) CAO, VAO = 0V, VCC= UVLO - 0.3V 250 400 uA Supply Current, On ICC(Off) 12 18 mA UC3854A 16 17.5 V VCC Turn-On Threshold VCC(On) UC3854B 10.5 11.2 V VCC Turn-OFF Threshold VCC(Off) UC3854A/B 9 10 V VCC Clamp VCC(Clamp) I(VCC) = ICC(on) + 5mA 18 20 22 V Voltage Amplifier Input Voltage VSENSE 2.9 3.0 3.1 V VSENSE Bias Current IVSENSE -500 -25 500 nA Open Loop Gain AVA VOUT= 2 ~ 5V 70 100 dB VOUT High VHV ILOAD= -500uA 6 V VOUT Low VLV ILOAD= 500uA 0.3 0.5 V Output Short Circuit Current ISCV VOUT= 0V 1.5 3.5 mA Gain Bandwidth Product GBV Fin = 100kHz, 10mV p-p, (Note 1) 1 mHz Current amplifier -4 TA=+25°C 0 mV Input Offset Voltage IOFFC VCM= 0V -5.5 Overtemp 0 mV Input Bias Current(sense) ICSENSE VCM= 0V -500 500 nA Open Loop Gain ACA VCM= 0V, VOUT= 2 ~ 6V 80 110 dB VOUT High VHC ILOAD= -500uA 8 V VOUT Low VLC ILOAD= 500uA 0.3 0.5 V Output Short Circuit Current ISCC VOUT= 0V 1.5 3.5 mA Common Mode Range VCMC -0.3 5 V Gain Bandwidth Product GBC Fin = 100kHz, 10mV p-p, (Note 1) 3 5 mHz Reference IREF = 0mA, TA= 25°C 7.4 7.5 7.6 V Output Voltage VREF IREF= 0mA 7.35 7.5 7.65 V △VLOAD IREF= 1 ~ 10mA Load Regulation 0 8 20 mV △VLINE VCC=12 ~ 18V Line Regulation 0 14 25 mV Short Circuit Current ISCR VREF= 0V 25 35 60 mA UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 6 QW-R103-082.a UC3854 Preliminary CMOS IC ELECTRICAL CHARACTERISTICS (Cont.) PARAMETER SYMBOL Oscillator Initial Accuracy f0 △f Voltage Stability VCC Total Variation fT Ramp Amplitude (p-p) VPP Ramp Valley Voltage VVAL Enable/Softstart /Current Limit Enable Threshold VENA Enable Hysteresis VHYS Enable Input Bias Current IENA Propagation Delay to Disable TENA SS Charge Current ISS PKLMT Offset Voltage VOFFP PKLMT Input Current IPK PKLMT Propagation Delay TPK Multiplier Output Current - IAC Limited ILIM Output Current - Zero IZERO Output Current - Power Limited IPLIM Output Current Gain Constant Gate Driver Output High Voltage IMULT K TEST CONDITIONS TA= 25°C VCC=12 ~ 18V Line, Temp TYP MAX UNIT 85 100 1 115 kHz % kHz V V 80 4.9 0.8 2.35 VFAULT= 2.5V VENABLE= 0V Enable Overdrive= -100mV (Note 1) VSOFTSTART= 2.5V VPKLMT= -0.1V (Note 1) IAC=100mA, VRMS= 1V, RSET= 10k IAC=0uA, RSET= 10k VRMS= 1.5V, Va = 6V VRMS= 1.5V, Va= 2V VRMS= 1.5V, Va= 5V VRMS= 5V, Va= 2V VRMS= 5V, Va= 5V (Note 2) VRMS= 1.5V, TJ= 25°C, Va = 6V VHG IOUT= -200mA, VCC=15V IOUT= 200mA Output Low Voltage Output VLG IOUT= 10mA Low (UVLO) IOUT= 50mA, VCC=0V Output Rise / Fall Time TRF CLOAD= 1nF (Note 1) Output Peak Current IPEAK CLOAD= 10nF (Note 1) Notes: 1. Guaranteed by design, not 100% tested in production I *(Va 1.5V) 2. Gain constant (K)= AC 2 VRMS * IMO UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 10 -15 -200 -220 -2.0 -230 -1.1 12 120 5.9 1.3 2.55 500 -2 300 14 2.8 600 -5 24 15 -100 150 -200 -0.2 -200 -22 -156 -2 -14 -1.0 12.8 1 300 0.9 35 1.0 -170 2.0 -170 -0.9 2.2 500 1.5 V mV uA ns mV uA ns uA uA uA uA uA uA uA A/A v V mV V ns A 5 of 6 QW-R103-082.a UC3854 Preliminary CMOS IC 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-R103-082.a