TECHNICAL DATA Power Factor Controllers There are active power factor controllers specifically designed for use as a preconverter in electronic ballast and in off-line power converter applications. These integrated circuits feature an internal startup timer for stand-alone applications, a one quadrant multiplier for near unity power factor, zero current detector to ensure critical conduction operation, transconductance error amplifier, quick start circuit for enhanced startup, trimmed internal bandgap reference, current sensing comparator, and a totem pole output ideally suited for driving a power MOSFET. Also included are protective features consisting of an overvoltage comparator to eliminate runaway output voltage due to load removal, input undervoltage lockout with hysteresis, cycle-by-cycle current limiting, multiplier output clamp that limits maximum peak switch current, an RS latch for single pulse metering, and a drive output high state clamp for MOSFET gate protection. These devices are available in dual-in-line and surface mount plastic packages. • Overvoltage Comparator Eliminates Runaway IL34262 ORDERING INFORMATION IL34262N Plastic IL34262D SOIC TA = 0° to 85° C for all packages. PIN CONNECTIONS Output Voltage • Internal Startup Timer • One Quadrant Multiplier • Zero Current Detector • Trimmed 2% Internal Bandgap Reference • Totem Pole Output with High State Clamp • Undervoltage Lockout with 6.0 V of Hysteresis • Low Startup and Operating Current • Supersedes Functionality of SG3561, TDA4817 and MC34262 2011, February, Rev. 01 IL34262 MAXIMUM RATINGS Rating Symbol Value Unit Total Power Supply and Zener Current (Icc + Iz) 30 mA Output Current, Source or Sink lo 500 mA Current Sense, Multiplier, and Voltage Feedback Inputs Vin -1.0 to +10 V Zero Current Detect Input Iin mA High State Forward Current 50 Low State Reverse Current -10 Power Dissipation and Thermal Characteristics N Suffix, Plastic Package Maximum Power Dissipation @ TA = 70°C PD 800 mW Thermal Resistance, Junction-to-Air RθJA 100 °C/W Maximum Power Dissipation @ TA = 70°C PD 450 mW Thermal Resistance, Junction-to-Air RθJA 178 0 Operating Junction Temperature TJ +150 °C Operating Ambient Temperature TA 0 to + 85 °C Storage Temperature Tstg -65 to +150 °C D Suffix, Plastic Package C/W * Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (\/cc =12 V, for min/max values TA is the operating ambient temperature range that applies unless otherwise noted.) Characteristic Symbol Min Max 2.465 2.44 — — 80 2.535 2.54 10 -0.5 130 — — — — Unit ERROR AMPLIFIER Voltage Feedback Input Threshold TA=25°C TA = T low to T high (Vcc = 12 V to 28 V) Line Regulation (VCC = 12 V to 28 V, TA = 25°C) Input Bias Current (VFB = 0 V) Transconductance (TA = 25°C) Output Current Source (VFB = 2.3 V) Sink (VFB = 2.7 V) Output Voltage Swing High State (VFB = 2.3 V) Low State (VFB = 2.7 V) VFB Regline IIB gm V mV µA µmho µA lo V VOH(ea) VOL(ea) 5.8 — — 2.4 2011, February, Rev. 01 IL34262 Characteristic Symbol Min Max Unit VFB(OV) 1.065VFB 1.095VFB V IIB Vth(M) — 1.05 VOL(EA) -0.5 — µA V Vpin3 Vpin2 K 0 to 2.5 Vth(M) to (Vth(M)+1.0) V 0.43 — — 0.87 Vth VH VIH VIL 1.33 100 6.1 0.3 1.87 300 — 1.0 V mV V IIB VIO Vth(max) — — 1.3 — -1.0 25 1.8 400 µA mV V ns — — 9.8 7.8 14 0.8 3.3 0.8 3.3 18 V VO(UVLO) — — — 120 120 0.5 ns ns V tDLY 200 — µs OVERVOLTAGE COMPARATOR Voltage Feedback Input Threshold MULTIPLIER Input Bias Current, Pin 3 (VFB = 0 V) Input Threshold, Pin 2 Dynamic Input Voltage Range Multiplier Input (Pin 3) Compensation (Pin 2) Multiplier Gain (Vpin 3 = 0.5 V, Vpin 2 = Vth(M) + 1.0 V) 1/V ZERO CURRENT DETECTOR Input Threshold Voltage (Vjn Increasing) Hysteresis (Vin Decreasing) Input Clamp Voltage High State (IDET = + 3.0 mA) Low State (IDET = - 3.0 mA) CURRENT SENSE COMPARATOR Input Bias Current (Vpin 4 = 0 V) Input Offset Voltage (Vpm 2 = 1.6 V, Vpm 3 = 0 V) Maximum Current Sense Input Threshold (Note 1) Delay to Output tPHL(in/out) DRIVE OUTPUT Output Voltage (VCC = 12 V) Low State (Isink = 20 mA) (Isink = 200 mA) High State (Isource = 20 mA) (Isource = 200 mA) Output Voltage (VCC = 30 V) High State (Isource = 20 mA, CL = 15 pF) Output Voltage Rise Time (CL 1.0 nF) Output Voltage Fall Time (CL 1.0 nF) Output Voltage with UVLO Activated (Vcc = 7.0 V,lSink= 1.0mA) V VOL VOH VO(max) tr tf RESTART TIMER Restart Time Delay Note 1: This parameter is measured with VFB =0V, and VPin3=3.0V 2011, February, Rev. 01 IL34262 Characteristic Symbol Min Max Unit Vth(on) VShutdown 11.5 7.0 14.5 9.0 V V VH 3.8 6.2 V ICC — mA VZ 30 0.4 12 20 — UNDERVOLTAGE LOCKOUT Startup Threshold (VCC Increasing) Minimum Operating Voltage After Turn-On (VCC Decreasing) Hysteresis TOTAL DEVICE Power Supply Current Startup (Vcc = 7.0 V) Operating Dynamic Operating (50 kHz, CL = 1.0 nF) Power Supply Zener Voltage (Ice = 25 mA) V 2011, February, Rev. 01 IL34262 <Design Equations> APPLICATION INFORMATION The application circuits shown in Figures 1, 2 and 3 reveal that few external components are required for a complete power factor preconverter. Each circuit is a peak detecting current-mode boost converter that operates in critical conduction mode with a fixed on-time and variable off-time. A major benefit of critical conduction operation is that the current loop is inherently stable, thus elimination the need for ramp compensation. The application in Figure 1 operates over an input voltage range if 90 Vac to 138 Vac and provides an output power of 80W (230V at 350mA) with an associated power factor of approximately 0.998 at nominal line. Figures 2 and 3 are universal input preconverter examples that operate over a continuous input voltage range of 90 Vac to 268Vac. Figure 2 provides an output power of 175W (400V at 440mA) while Figure 3 provides 450W (400V at 1.125A). Both circuits have an observed worst-case power factor of approximately 0.989. 2011, February, Rev. 01 IL34262 Figure 1. 80W Power Factor Controller 2011, February, Rev. 01 IL34262 Figure 2. 175W Universal Input Power Factor Controller 2011, February, Rev. 01 IL34262 Figure 3. 450W Universal Input Power Factor Controller 2011, February, Rev. 01 IL34262 N SUFFIX PLASTIC DIP (MS – 001BA) A Dimension, mm 5 8 B 1 4 MIN MAX A 8.51 10.16 B 6.1 7.11 C L F Symbol C 5.33 D 0.36 0.56 F 1.14 1.78 -T- SEATING PLANE N G K D 0.25 (0.010) M M H J T NOTES: 1. Dimensions “A”, “B” do not include mold flash or protrusions. Maximum mold flash or protrusions 0.25 mm (0.010) per side. G 2.54 H 7.62 J 0° 10° K 2.92 3.81 L 7.62 8.26 M 0.2 0.36 N 0.38 2011, February, Rev. 01