IR2520DPBF

Data Sheet No. PD60212 revC IR2520D(S) & (PbF) ADAPTIVE BALLAST CONTROL IC Packages 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) 8 Lead SOIC IR2520DS 8-Lead PDIP IR2520D 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 SPIRAL CFL BR1 MHS LF CVCC L1 CBUS CF FMIN RFMIN L2 COM 2 3 VCO 4 CVCO VB IR2520D F1 VCC 1 8 7 LRES HO VS CBS CSNUB CDC 6 5 CRES LO MLS 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 Definition Min. Max. Units VB High side floating supply voltage -0.3 625 VS High side floating supply offset voltage VB - 25 VB + 0.3 VHO High side floating output voltage VS - 0.3 VB + 0.3 VLO Low side output voltage -0.3 VCC + 0.3 IVCO Voltage controlled oscillator input current (Note 1) -5 +5 ICC dVS/dt PD RthJA V mA Supply current (Note 2) -25 25 mA Allowable offset voltage slew rate -50 50 V/ns Package power dissipation @ TA ≤ +25°C 8-Lead PDIP — 1 PD=(TJMAX-TA)RthJA 8-Lead SOIC — 0.625 8-Lead PDIP — 125 8-Lead SOIC — 200 Thermal resistance, junction to ambient TJ Junction temperature -55 150 TS Storage temperature -55 150 TL Lead temperature (soldering, 10 seconds) — 300 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 Definition High side floating supply voltage Steady state high side floating supply offset voltage Min. Max. VCC - 0.7 VCLAMP Units -1 600 V VCC Supply voltage VCCUV+ VCLAMP ICC Supply current Note 3 10 mA 20 140 kΩ 0 5 V -25 125 °C RFMIN Minimum frequency setting resistance VVCO VCO pin voltage TJ Junction temperature 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 Definition Min. Typ. Max. Units Test Conditions Supply Characteristics VCCUV+ 11.4 12.6 13.8 9.0 10.0 11.0 VUVHYS VCC and VBS supply undervoltage positive going threshold VCC and VBS supply undervoltage negative going threshold VCC supply undervoltage lockout hysteresis — 2.7 — IQCCUV IQCCFLT ICCHF ICCLF VCLAMP UVLO quiescent current Fault mode quiescent current VCC supply current f=85KHz VCC supply current f=35KHz VCC Zener clamp voltage — — — — 14.4 45 100 4.5 2.0 15.4 80 — — — — — — 7.7 6.8 — 80 20 9.0 8.0 — 150 40 10.3 9.2 50 29.6 67 — — — — 0.8 — — 34 86 50 2.0 2.0 50 1.3 1.1 6 38.2 96 — — — — 1.7 — — VCCUV- VCC rising from OV V µA mA V VCC = 10V VVCO=0V VVCO=6V ICC = 10mA 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 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 kHz VVCO=6V VVCO=0V % µS µA VVCO=0V VVCO=2V V Gate Driver Output Characteristics VLO=LOW LO output voltage when LO is low — COM — VHO=LOW VLO=HIGH VHO=HIGH TRISE TFALL IO+ IO- 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 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 VCO voltage when entering run mode — 4.8 — V CSCF Crest factor peak-to-average fault factor — 5.0 — N/A VS_ Maximum crest factor VS offset voltage — 3.0 — V 0.74 0.82 0.91 V FMIN lead voltage during normal operation 4.8 5.1 5.4 V FMIN lead voltage during fault mode — 0 — V VS offset = 0.5V OFFSET_MAX VVCOSD VVCO shutdown voltage Minimum Frequency Setting Characteristics VFMIN VFMINFLT Bootstrap FET IBS1 VB current 30 70 — IBS2 VB current 10 20 — mA CBS=0.1uF, VS=0V VBS = 10V Lead Definitions Symbol Description Supply voltage COM IC power and signal ground FMIN Minimum frequency setting VCO Voltage controlled oscillator input LO Low-side gate driver output VS High-side floating return HO High-side gate driver output VB High-side gate driver floating supply 4 VCC 1 COM 2 FMIN 3 VCO 4 8 IR2520D(S) VCC VB 7 HO 6 VS 5 LO www.irf.com IR2520D(S) & (PbF) Block Diagram Bootstrap FET VCC 1 Bootstrap FET Control 15.6V COM 2 IFMAX IFMIN IVCO S 5V IQS R1 UVLO 1V 8 VB 7 HO 6 VS 5 LO Q R2 High-Voltage Well VCO 4 5.1V IDT T Q R Q Driver Logic HIN Level Shift PGEN VS-Sensing FET SET RST Level-Shift FETs VCC LIN CT 300ns PGEN Fault Logic 0.8V VCC 4.8V S Q R Q S1 Q S2 R1 R2 Q 1us blank Averaging Circuit x5 UVLO 120uA 5V IFMIN= FMIN 3 5V RRFMIN 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-) FAULT Mode 1 /2-Bridge Off V VCO = 0V IQCCFLT ≅100µA VFMIN = 0V VVCO = 0V VFMIN = 0V VCC > 12.6V (VCCUV+) Frequency Sweep Mode Crest Factor > 5.0 (CSCF) or V VCO < 0.82V (VVCOSD) VFMIN = 5.1V VCC < 10V (VCCUV-) VCO ramps up, frequency ramps down Crest Factor Disabled ZVS Disabled 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