IR2520DS

Data Sheet No. PD60212 revC IR2520D(S) & (PbF) ADAPTIVE BALLAST CONTROL IC • • • • • • • • • • Features 600V Half Bridge Driver Integrated Bootstrap FET Adaptive zero-voltage switching (ZVS) Internal Crest Factor Over-Current Protection 0 to 6VDC Voltage Controlled Oscillator Programmable minimum frequency Micropower Startup Current (80uA) Internal 15.6V zener clamp on Vcc Small DIP8/SO8 Package Also available LEAD-FREE (PbF) Packages 8-Lead PDIP IR2520D 8 Lead SOIC IR2520DS Description The IR2520D(S) is a complete adaptive ballast controller and 600V half-bridge driver integrated into a single IC for fluorescent lighting applications. The IC includes adaptive zero-voltage switching (ZVS), internal crest factor over-current protection, as well as an integrated bootstrap FET. The heart of this IC is a voltage controlled oscillator with externally programmable minimum frequency. All of the necessary ballast features are integrated in a small 8-pin DIP or SOIC package. Typical Application Diagram RSUPPLY DCP2 BR1 MHS F1 L1 CBUS CF RFMIN L2 LF CVCC VCC 1 COM 2 FMIN VB SPIRAL CFL 8 7 6 5 LO MLS HO VS CBS LRES CSNUB CDC CRES IR2520D 3 VCO 4 CVCO DCP1 www.irf.com 1 IR2520D(S)& (PbF) Absolute Maximum Ratings Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. All voltage parameters are absolute voltages referenced to COM, all currents are defined positive into any lead. The thermal resistance and power dissipation ratings are measured under board mounted and still air conditions. Symbol VB VS VHO VLO IVCO ICC dVS/dt PD RthJA TJ TS TL Definition High side floating supply voltage High side floating supply offset voltage High side floating output voltage Low side output voltage Voltage controlled oscillator input current (Note 1) Supply current (Note 2) Allowable offset voltage slew rate Package power dissipation @ TA ≤ +25°C PD=(TJMAX-TA)RthJA Thermal resistance, junction to ambient 8-Lead PDIP 8-Lead SOIC 8-Lead PDIP 8-Lead SOIC Junction temperature Storage temperature Lead temperature (soldering, 10 seconds) Min. -0.3 V B - 25 VS - 0.3 -0.3 -5 -25 -50 — — — — -55 -55 — Max. 625 VB + 0.3 VB + 0.3 VCC + 0.3 +5 25 50 1 0.625 125 200 150 150 300 Units V mA mA V/ns W °C/W °C Note 1: This IC contains a zener clamp structure between the chip VCO and COM, which has a nominal breakdown voltage of 6V. Please note that this pin should not be driven by a DC, low impedance power source greater than 6V. Note 2: This IC contains a zener clamp structure between the chip VCC and COM, which has a nominal breakdown voltage of 15.6V. Please note that this supply pin should not be driven by a DC, low impedance power source greater than the VCLAMP specified in the Electrical Characteristics section. Recommended Operating Conditions For proper operation the device should be used within the recommended conditions. Symbol VBS VS VCC ICC RFMIN VVCO TJ Definition High side floating supply voltage Steady state high side floating supply offset voltage Supply voltage Supply current Minimum frequency setting resistance VCO pin voltage Junction temperature Min. VCC - 0.7 -1 VCCUV+ Note 3 20 0 -25 Max. VCLAMP 600 VCLAMP 10 140 5 125 Units V mA kΩ V °C Note 3: Enough current should be supplied into the VCC pin to keep the internal 15.6V zener clamp diode on this pin regulating its voltage, VCLAMP. 2 www.irf.com IR2520D(S) & (PbF) Electrical Characteristics VCC = VBS = VBIAS = 14V +/- 0.25V, CLO=CHO=1000pF, RFMIN = 82kΩ and TA = 25°C unless otherwise specified. Symbol VCCUV+ VCCUVVUVHYS IQCCUV IQCCFLT ICCHF ICCLF VCLAMP Definition VCC and VBS supply undervoltage positive going threshold VCC and VBS supply undervoltage negative going threshold VCC supply undervoltage lockout hysteresis UVLO quiescent current Fault mode quiescent current VCC supply current f=85KHz VCC supply current f=35KHz VCC Zener clamp voltage Min. Typ. Max. Units Test Conditions 11.4 9.0 — — — — — 14.4 12.6 10.0 2.7 45 100 4.5 2.0 15.4 13.8 11.0 — 80 — — — — µA mA V VCC = 10V VVCO=0V VVCO=6V ICC = 10mA V VCC rising from OV Supply Characteristics Floating Supply Characteristics IQBS0 IQBSUV VBSUV+ VBSUVILK Quiescent VBS supply current Quiescent VBS supply current VBS supply undervoltage positive going threshold VBS supply undervoltage negative going threshold Offset supply leakage current — — 7.7 6.8 — 80 20 9.0 8.0 — 150 40 10.3 9.2 50 µA V V µA VCC=10V, VBS=14V VCC=10V, VBS=7V VB = VS = 600V Oscillator I/O Characteristics f(min) f(max) D DTLO DTHO IVCOQS IVCOFS IVCO_5V VVCO_max Minimum oscillator frequency (Note 4) Maximum oscillator frequency (Note 4) Oscillator duty cycle LO output deadtime HO output deadtime IVCO quick start IVCO frequency sweep IVCO when VCO is at 5V Maximum VCO voltage 29.6 67 — — — — 0.8 — — 34 86 50 2.0 2.0 50 1.3 1.1 6 38.2 96 — — — — 1.7 — — kHz % µS µA V VVCO=0V VVCO=2V VVCO=6V VVCO=0V Gate Driver Output Characteristics VLO=LOW VHO=LOW VLO=HIGH VHO=HIGH TRISE TFALL IO+ IOLO output voltage when LO is low HO output voltage when HO is low LO output voltage when LO is high HO output voltage when HO is high Turn on rise time Turn off fall time Output source short circuit pulsed current Output sink short circuit pulse current — — — — — — — — COM COM VCC VCC 150 75 140 230 — — — — 230 120 — — mV nS mA mA Note 4: Frequency shown is nominal for RFMIN=82kΩ. Frequency can be programmed higher or lower with the value of RFMIN. www.irf.com 3 IR2520D(S)& (PbF) Electrical Characteristics VCC = VBS = VBIAS = 14V +/- 0.25V, CLO=CHO=1000pF, RFMIN = 82kΩ and TA = 25°C unless otherwise specified. Symbol Definition Min. Typ. Max. Units Test Conditions Protection Characteristics VVCO_RUN CSCF VS_ OFFSET_MAX VCO voltage when entering run mode Crest factor peak-to-average fault factor Maximum crest factor VS offset voltage VVCO shutdown voltage — — — 0.74 4.8 5.0 3.0 0.82 — — — 0.91 V N/A V V VS offset = 0.5V VVCOSD Minimum Frequency Setting Characteristics VFMIN VFMINFLT FMIN lead voltage during normal operation FMIN lead voltage during fault mode 4.8 — 5.1 0 5.4 — V V Bootstrap FET IBS1 IBS2 VB current VB current 30 10 70 20 — — mA CBS=0.1uF, VS=0V VBS = 10V Lead Definitions Symbol VCC COM FMIN VCO LO VS HO VB Description Supply voltage IC power and signal ground Minimum frequency setting Voltage controlled oscillator input Low-side gate driver output High-side floating return High-side gate driver output High-side gate driver floating supply VCC 1 8 VB IR2520D(S) COM 2 7 HO 6 5 VS LO FMIN 3 VCO 4 4 www.irf.com IR2520D(S) & (PbF) Block Diagram Bootstrap FET VCC 1 15.6V COM 2 IFMIN IVCO IQS Bootstrap FET Control IFMAX 8 5V UVLO 1V S R1 R2 Q VB HO VS 7 6 High-Voltage Well VS-Sensing FET VCC VCO 4 5.1V T IDT CT 300ns PGEN 0.8V Fault Logic S1 Q S2 R1 R2 Q R Q Q Driver Logic HIN Level Shift PGEN SET RST Level-Shift FETs LIN 5 LO 1us blank Averaging Circuit x5 VCC 4.8V S R Q Q UVLO 120uA 5V IFMIN= 5V RRFMIN FMIN 3 All values are typical www.irf.com 5 IR2520D(S)& (PbF) State Diagram Power Turned On VCCUV Mode 1 /2 -Bridge Off IQCC ≅ 45 µA VCC < 10V (VCCUV-) VVCO = 0V VFMIN = 0V FAULT Mode /2-Bridge Off V VCO = 0V IQCCFLT ≅100µ A VFMIN = 0V 1 VCC > 12.6V (VCCUV+) Frequency Sweep Mode Crest Factor > 5.0 (CSCF) or V VCO < 0.82V (VVCOSD) VFMIN = 5.1V VCO ramps up, frequency ramps down Crest Factor Disabled ZVS Disabled VCC < 10V (VCCUV-) VVCO >4.8V (VVCO _RUN) RUN Mode VVCO = 6.0V, Frequency = fmin Crest Factor Enabled ZVS Enabled If non-ZVS detected then VVCO decreases and frequency increases to maintain ZVS All values are typical 6 www.irf.com IR2520D(S) & (PbF) Functional Description Under-voltage Lock-Out Mode The under-voltage lock-out mode (UVLO) is defined as the state the IR2520D is in when VCC is below the turn-on threshold of the IC. The IR2520D UVLO is designed to maintain an ultra-low supply current (IQCCUV