IR21593S

Data Sheet No. PD60194_A IR21592(S) IR21593(S) Features DIMMING BALLAST CONTROL IC • Full lamp fault protection • Brown-out protection • Automatic restart • Micro-power startup • Zener clamped Vcc • Over-temperature protection • 16-pin DIP and SOIC package types Parameter Deadtime Frequency Range IR21592 1.8us See Graph 11 IR21593 1.0us See Graph 12 • Ballast control and half-bridge driver in one IC • Transformer-less lamp power sensing • Closed-loop lamp power control • Closed-loop preheat current control • Programmable preheat time • Programmable preheat current • Lamp ignition detection • Programmable ignition-to-dim time • 0.5 to 5VDC dimming control input • Min and max lamp power adjustments • Programmable minimum frequency • Internal current sense blanking Description Description: The IR21592/IR21593 are complete dimming ballast controllers and 600V half-bridge drivers all in one IC. The architecture includes phase control for transformer-less lamp power sensing and regulation which minimizes changes needed to adapt non-dimming ballasts for dimming. Externally programmable features such as preheat time and current, ignition-to-dim time, and a complete dimming interface with minimum and maximum settings provide a high degree of flexibility for the ballast design engineer. Protection from failure of a lamp to strike, filament failures, thermal overload, or lamp failure during normal operation, as well as an automatic restart function, have been included in the design. The heart of this control IC is a voltagecontrolled oscillator with externally programmable minimum frequency. The IR21592/ IR21593 are available in both 16 pin DIP and 16 pin narrow body SOIC packages. Packages 16 Lead SOIC (narrow body) 16 Lead PDIP Typical Connection + Rectified AC Line + DC Bus RVDC CVDC CVCO CPH RDIM RMAX RMIN RFMIN RIPH RVAC RPULL-UP 1 16 Single Lamp Dimmable VDC HO 2 VCO VS 15 3 CPH VB 14 0.5 to 5VDC 4 DIM VCC 13 5 MAX COM 12 6 MIN LO 11 7 FMIN CS 10 8 IPH SD 9 RCS - DC Bus www.irf.com 1 IR21592/IR21593(S) 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 IOMAX VVCO I CPH VIPH VDIM VMAX VMIN VCS ISD ICC dV/dt PD RthJA TJ TS TL Note 1: Definition High side floating supply voltage High side floating supply offset voltage High side floating output voltage Low side output voltage Maximum allowable output current (either output) due to external power transistor miller effect Voltage controlled oscillator input voltage CPH current IPH voltage Dimming control pin input voltage Maximum lamp power setting pin input voltage Minimum lamp power setting pin input voltage Current sense input voltage Shutdown pin current Supply current (note 1) Allowable offset voltage slew rate Package power dissipation @ TA ≤ +25°C PD = (TJMAX-TA)/RthJA Thermal resistance, junction to ambient Junction temperature Storage temperature Lead temperature (soldering, 10 seconds) (16 pin DIP) (16 pin SOIC) (16 pin DIP) (16 pin SOIC) Min. -0.3 V B - 25 VS - 0.3 -0.3 -500 -0.3 -5 -0.3 -0.3 -0.3 -0.3 -0.3 -5 — -50 — — — — -55 -55 — Max. 625 VB + 25 VB + 0.3 VCC + 0.3 500 6.0 5 5.5 5.5 5.5 5.5 5.5 5 25 50 1.60 1.25 75 115 150 150 300 Units V mA V mA V mA V/ns W o C/W o C This IC contains a zener clamp structure between the chip VCC and COM which has a nominal breakdown voltage of 15.6V (VCLAMP). Please note that this supply pin should not be driven by a DC, low impedance power source greater than the diode clamp voltage (VCLAMP) as specified in the Electrical Characteristics section. 2 www.irf.com IR21592/IR21593(S) Recommended Operating Conditions For proper operation the device should be used within the recommended conditions. Symbol VBS VS V CC I CC VVCO VDIM VMAX VMIN VBSMIN RFMIN ISD ICS TJ Definition High side floating supply voltage Steady state high side floating supply offset voltage Supply voltage Supply current VCO pin voltage DIM pin voltage MAX pin current (note 3) MIN pin voltage Minimum required VBS voltage for proper HO functionality Minimum frequency setting resistance Shutdown pin current Current sensing pin current Junction temperature Min. VCC - 0.7 -1 V CCUV+ note 2 0 0.5 -750 1 — 10 -1 -1 -40 Max. V CLAMP 600 VCLAMP (15.6) 10 5 5.0 0 3 5 100 1 1 125 Units V mA V µA V kΩ mA o C Note 2: Note 3: Enough current should be supplied into the VCC lead to keep the internal 15.6V zener clamp diode on this lead regulating its voltage, VCLAMP. The MAX lead is a voltage-controlled current source. For optimum dim interface current mirror performance, this current should be kept between 0 and 750µA. Electrical Characteristics VCC = VBS = VBIAS = 14V +/- 0.25V, VCS = 0.5V, VSD = 0.0V, RFMIN = 40k, CVCO = 10 nF, VDIM = 0.0V, RMAX = 33k, RMIN = 56k, VCPH = 0.0V, CLO,HO = 1000pF, TA = 25oC unless otherwise specified. Symbol Definition Min. Typ. Max. Units Test Conditions Supply Characteristics VCCUV+ VCCHYS IQCCUV IQCCFLT ICCFMIN ICCFMAX ICCFMIN ICCFMAX VCLAMP VCC supply undervoltage positive going 12.0 threshold VCC supply undervoltage lockout hysteresis 1.5 UVLO mode quiescent current 70 Fault-mode quiescent current — VCC VCC VCC VCC supply supply supply supply current @ FMIN (IR21592) current @ FMAX (IR21592) current @ FMIN (IR21593) current @ FMAX (IR21593) — — — — 14.5 12.5 1.6 200 240 5.6 6.0 5.4 6.8 15.6 13.0 V 1.7 330 — — — — — 16.5 VCC = 10V SD=5V, CS=2V, or Tj > TSD VVCO = 0V VVCO = 5V VVCO = 0V VVCO = 5V ICC = 10mA µA mA VCC zener shunt clamp voltage V www.irf.com 3 IR21592/IR21593(S) Electrical Characteristics (cont.) VCC = VBS = VBIAS = 14V +/- 0.25V, VCS = 0.5V, VSD = 0.0V, RFMIN = 40k, CVCO = 10 nF, VDIM = 0.0V, RMAX = 33k, RMIN = 56k, VTPH = 0.0V, CLO,HO = 1000pF, TA = 25oC unless otherwise specified. Symbol Definition Min. Typ. Max. Units Test Conditions Floating Supply Characteristics IBSFMIN IBSFMAX ILK VBS supply current (low freq.) VBS supply current (high freq.) Offset supply leakage current — — — 0 30 — — — 50 µA VVCO = 0V VVCO = 5V VB = VS = 600V Oscillator I/O Characteristics f vco f vco d VVCOFLT IVCOPH IVCODIM VCO frequency range (IR21592) (See graph 11) VCO frequency range (IR21593) (See graph 12) Gate drive outputs duty cycle Fault-mode VCO pin voltage (UVLO, shutdown, over-current/temp.) Preheat mode VCO pin discharge current Dim mode VCO pin discharge current 15 73 — — — — — — 18 95 30 230 50 5 1.0 16.0 22 108 — — — — — — kHz % V VVCO=0V, RFMIN=40KΩ VVCO=5V, RFMIN=40KΩ VVCO=0V, RFMIN=40KΩ VVCO=5V, RFMIN=40KΩ VVCO = 2.5V VCPH=2.5V, VIPH=0.5V µA µA VVCO=2.5V, VCPH=5.5V, IVCOPK tDTLO tDTHO tDTLO tDTHO Amplitude control VCO pin charging current LO output deadtime (IR21592) HO output deadtime (IR21592) LO output deadtime (IR21593) HO output deadtime (IR21593) — — — — — 60 1.8 1.8 1.0 1.0 — — — — — VIPH=0.5V, 1V Pulse at CS VCPH=0V, VCS =1V, VIPH=0.5V, VVCO=2.5V VVCO=0V, VMIN=1.5V, µs VIPH=0.5V Gate Driver Output Characteristics tr tf Turn-on rise time Turn-off fall time 48.5 24.25 120 65 180 145 ns 4 www.irf.com IR21592/IR21593(S) Electrical Characteristics (cont.) VCC = VBS = VBIAS = 14V +/- 0.25V, VCS = 0.5V, VSD = 0.0V, RFMIN = 40k, CVCO = 10 nF, VDIM = 0.0V, RMAX = 33k, RMIN = 56k, VTPH = 0.0V, CLO,HO = 1000pF, TA = 25oC unless otherwise specified. Symbol Definition Min. Typ. Max. Units Test Conditions Preheat Characteristics ICPH VCPHIGN VCPHCLMP IIPH VCSTHPH CPH pin charging current CPH pin ignition mode threshold voltage CPH pin clamp voltage IPH pin DC source current Peak preheat current regulation threshold 0.8 4.3 — — — 1.3 5.0 10 25 0.7 2.1 5.7 — — — µA V µA V VCPH=VDIM=4.7V, VCS=1.0V VCS=2.0V VCS=VDIM=VIPH=0V VCPH=VDIM=4.7V, IIPH=1/RFMIN RIPH=27K, VMIN=0V, VCPH=0V, VCSTH = (IIPH) x (RIPH) SD = 5V, or CS = 2V, or Tj > TSD VCPHFLT CPH pin voltage during UVLO or fault — 0.0 — V Ignition Detection IIPHIGN+ IIPHIGNIPH source current (Vcs rising) IPH source current (Vcs falling) — — 30 27.5 — — µA VCS=0V, RIPH=18K, VCPH>5.1V VCS =1.0V, VCPH>5.1V Protection Characteristics VSDTH+ VCSTH VVDCTH+ VSDHYS VVDCHYS VSDCLMP TSD Rising shutdown pin threshold voltage Peak over current threshold Rising VDC pin threshold voltage SD threshold hysteresis VDC threshold hysteresis SD pin clamp voltage Thermal shutdown junction temperature 1.6 1.2 — — — — — 2.0 1.6 5.1 150 2.1 7.6 165 2.6 1.9 — — — — — V mV V oC VCPH =VIPH=0V VCPH < 5V VCPH=VCS=VSD=0V VCPH =VIPH=0V VCPH=VCS=VSD=0V ISD = 100mA Phase Control VCSTHZX tBlank Zero-crossing threshold voltage Zero-crossing internal blank time — 291 0.0 400 — 1030 V ns VCPH =5.5V,VIPH=0.5V VCPH =5.5V,VIPH=0.5V Dimming Interface VDIMOFF VMINMIN VMINMAX VFMIN VFMINFLT DIM pin offset voltage DIM minimum reference voltage (MIN pin) DIM maximum reference voltage (MIN pin) — — — 0.5 1.0 3.0 — — — V VCPH=5.5V,VIPH=0.5V VCPH =0.5V,VIPH=0.5V Minimum Frequency Setting FMIN pin voltage during normal operation FMIN pin voltage during fault mode 4.6 — 5.1 0.0 6.25 — V V VMIN=1.5V,VIPH=0.5V SD = 5V, or CS = 2V, or Tj > TSD www.irf.com 5 IR21592/IR21593(S) Block Diagram 60uA VCC VCO 2 1uA RFB 15uA ICT V 14 LEVEL SHIFT PULSE FILTER & LATCH VB HO VS 16 VDC 1 1.0uA S R Q Q ERR 15 CPH 3 REF CT 13 5.1V S R1 R2 Q Q T R Q Q 15.6V VCC LO COM 10V 11 ICT S R Q Q 1.0V I DT + I CT CT 12 400ns DELAY DIM 4 5.1V IDIM FB MAX 5 4/RFMIN 0.1/R FMIN 0.1/R FMIN 10 IGN DET 3V S R 1/RFMIN 1.6V 1 CS Q Q S R MIN 6 IDIM/5 IFMIN Q Q OVERTEMP DETECT FMIN 7 5.1V 5.1V UNDERVOLTAGE DETECT 2.0V 9 7.6V SD IPH 8 0 Lead Assignments & Definitions Pin Assignments VDC VCO CPH DIM MAX MIN FMIN IPH 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 Pin # Symbol HO VS VB VCC COM LO CS SD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 VDC VCO CPH DIM MAX MIN FMIN IPH SD CS LO COM VCC VB VS HO Description Line input voltage detection Voltage controlled oscillator Input Preheat timing input 0.5 to 5VDC dimming control input Maximum lamp power setting Minimum lamp power setting Minimum frequency setting Peak preheat current reference Shutdown input Current sensing input Low-side gate driver output IC power & signal ground Logic & low-side gate driver supply High-side gate driver floating supply High voltage floating return High-side gate driver output 6 www.irf.com IR21592/IR21593(S) State Diagram Power Turned On UVLO Mode 1/2-Bridge Off IQCC=200mA CPH=0V Oscillator Off VCC > 12.5V and VDC > 5.1V and SD < 1.7V and T < 165C J (UV+) (Bus OK) (Lamp OK) (T ) jmax VCC < 10.9V (VCC Fault or Power Down) or VDC < 3.0V (dc Bus/ac Line Fault or Power Down) or SD > 2.0V (Lamp Fault or Lamp Removal) SD > 2.0V (Lamp Removal) or VCC < 10.9V (Power Turned Off) FAULT Mode Fault Latch Set 1/2-Bridge Off IQCC =240µA CPH=0V VCC=15.6V Oscillator Off T > 165C J (Over-Temperature) PREHEAT Mode 1/2-BridgeOscillator On VCSPK+VIPH (Peak Current Control) CPH Charging@I PH+1µA DIM+Open Circuit Over-Current Disabled CPH > 5.1V CS > V CSTH (1.6V) (Failure to Strike Lamp or Hard Switching) or T J > 165C (Over-Temperature) (End of PREHEAT Mode) IGNITION Mode fPH ramps to fMIN CPH Charging@I PH+1µA DIM=Open Circuit Over-Current Enabled CS > V CSTH (1.6V) (Over-Current or Hard Switching) or TJ > 165C VCS>VIPH(enable ignition detection) (Over-Temperature) then VCS 5kHz I ign < I ignmax πCVph [Hz] (3) Ignition during preheat Production tolerances Inductor saturation Lamp extinguishing during dimming I Cath1% ≥ I Cathmin The resulting operating frequency during ignition is given as: Table II, Ballast design constraints f ign = 1 2π 1+ 4 π VDC Vign LC IR21592/IR21593 Programmable Inputs [Hz] (4) In order to program the MIN and MAX settings of the dimming interface, the phase of the output stage current at minimum and maximum lamp power must be calculated. This is obtained using the following equations: The total load current during ignition is given as: Iign = f ign CVign 2π [App] (5) 22 www.irf.com IR21592/IR21593(S)  4VDC   2 1−  V π  2 2  1 32P  1 1 32P % % % − + − − f% = 4 4 2π LC C2V%  LC C2V%  L2C2 2 (8) ϕ% = 2 180 −1 V% 2P V2 3 % tan [( C − 2 L)2πf% − 4 % LC2π3 f%] 2P V% P π % % (9) With the lamp requirements defined, the L and C of the ballast output stage selected, and the minimum and maximum phase calculated, the component values for setting the programmable inputs of the IR21592/IR21593 are obtained with the following equations: R FMIN = (25e − 6) − ( f MIN − 10000) ⋅ (1e − 10) ( f MIN − 10000) ⋅ (2e − 14) [Ohms] (10) [Ohms] RCS = 2 ⋅ (1.6) I ign (11) (12) RIPH = RFMIN RCS I ph 2 C CPH = (2.6 E − 7)(t PH ) R FMIN  ϕ 1%  1 −  4 45  [Ohms] [Farads] (13) RMIN = [Ohms] (14) RMAX = 0.86 ⋅ RFMIN ⋅ RMIN ϕ  4 ⋅ RMIN − RFMIN ⋅ 1 − 100%  45   [Ohms] (15) 23 www.irf.com IR21592/IR21593(S) This ballast design procedure has been summarized into the following 3 steps: Define Lamp Requirements Iterate L and C to fulfill constraints Calculate IR21592/IR21593 IR2159 Programmable Inputs Figure 19, Simplified Ballast Design Procedure Case outline 16 Lead PDIP 24 01-6015 01-3065 00 (MS-001A) www.irf.com IR21592/IR21593(S) 16 -Lead SOIC (narrow body) 01-6018 01-3064 00 (MS-012AC) IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 Tel: (310) 252-7105 Data and specifications subject to change without notice. This product has been designed and qualfied for the industrial market. 11/13/2003 www.irf.com 25