KK34262

TECHNICAL DATA Power Factor Controllers The 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. KK34262 ORDERING INFORMATION KK34262N Plastic KK34262D SOIC TA = 0° to 85° C for all packages. • Overvoltage Comparator Eliminates Runaway 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 PIN CONNECTIONS KK34262 MAXIMUM RATINGS Rating Total Power Supply and Zener Current Output Current, Source or Sink Current Sense, Multiplier, and Voltage Feedback Inputs Zero Current Detect Input High State Forward Current Low State Reverse Current Power Dissipation and Thermal Characteristics N Suffix, Plastic Package Maximum Power Dissipation @ TA = 70°C Thermal Resistance, Junction-to-Air D Suffix, Plastic Package Maximum Power Dissipation @ TA = 70°C Thermal Resistance, Junction-to-Air Operating Junction Temperature Operating Ambient Temperature Storage Temperature PD RθJA TJ Symbol (Icc + Iz) lo Vin Iin Value 30 500 -1.0 to +10 50 -10 Unit mA mA V mA PD RθJA 800 100 450 178 +150 0 to + 85 -65 to +150 mW °C/W mW 0 C/W °C °C °C TA Tstg ELECTRICAL CHARACTERISTICS (\/cc =12 V, for min/max values TA is the operating ambient temperature range that applies unless otherwise noted.) Characteristic Symbol VFB 2.465 2.44 — — 80 — — VOH(ea) VOL(ea) 5.8 — 2.535 2.54 10 -0.5 130 — — V — 2.4 Min Max Unit V ERROR AMPLIFIER Voltage Feedback Input Threshold TA=25°C TA = Tlow to Thigh (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) Regline IIB gm lo mV µA µmho µA KK34262 Characteristic Symbol VFB(OV) IIB Vth(M) Vpin3 Vpin2 K Min 1.065VFB — 1.05 VOL(EA) 0 to 2.5 Vth(M) to (Vth(M)+1.0) 0.43 Max 1.095VFB -0.5 — — — 0.87 Unit V µA V V 1/V 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) ZERO CURRENT DETECTOR Input Threshold Voltage (Vjn Increasing) Hysteresis (Vin Decreasing) Input Clamp Voltage High State (IDET = + 3.0 mA) High State (IDET = - 3.0 mA) Vth VH VIH VIL 1.33 100 6.1 0.3 1.87 300 — 1.0 V mV V 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 IIB VIO Vth(max) tPHL(in/out) — — 1.3 — -1.0 25 1.8 400 µA mV V ns V VOL VOH VO(max) tr tf VO(UVLO) — — 9.8 7.8 14 — — — 0.8 3.3 0.8 3.3 18 120 120 0.5 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 ns ns V RESTART TIMER Restart Time Delay tDLY 200 — µs Note 1: This parameter is measured with VFB =0V, and VPin3=3.0V KK34262 Characteristic Symbol Vth(on) VShutdown VH ICC Min 11.5 7.0 3.8 — Max 14.5 9.0 6.2 0.4 12 20 — Unit V V V mA 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) VZ 30 V KK34262 APPLICATION INFORMATION The application circuits shown in Figures 19, 20 and 21 reveal that few external components are required for a complete power factor preconverter. Each circuit is a p eak d e tect i ng current -m ode boost c onvert er t h at operates in critical conduction mode with a fixed on-time a nd vari abl e o ff-t i m e. A m a jor bene f i t o f c r i t i c a l conduction operation is that the current loop is inherently stable, thus elimination the need for ramp compensation. Th e ap p lication in Figure 19 operates over an input voltage range if 90 Vac to 138 Vac and provides an o u t p u t p o wer of 80W ( 230V at 3 50m A) wi t h a n a sso ci at ed power fact or of approxi m a t e l y 0 .998 at n omin al lin e. Figures 20 and 21 are universal input preconverter examples that operate over a continuous input voltage range of 90 Vac to 268Vac. Figure 20 provides an output power of 175W (400V at 440mA) while Figure 21 provides 450W (400V at 1.125A). Both circuits have an observed worst-case power factor of a pproximately 0 .989. The input c urrent a nd voltage waveforms of Figure 20 are shown in Figure 22 with operation at 115 Vac and 230 Vac. The data for each of t h e a p p l icatio n s w as g e n e rated w ith t h e test set-u p shown in Figure 24. KK34262 80W Pow er Factor Controller KK34262 175W Universal Input Pow er Factor Controller KK34262 450W Universal Input Pow er Factor Controller KK34262 N S UFFIX PLAS TIC DIP (MS – 0 0 1BA) A 8 5 B 1 4 Dimens ion, mm Symbol A B MIN 8.51 6.1 MAX 10.16 7.11 5.33 0.36 1.14 2.54 7.62 0° 2.92 7.62 0.2 0.38 10° 3.81 8.26 0.36 0.56 1.78 F L C D C -T- SEATING PL AN E F G M H J N G D 0.25 (0.010) M T K H J K L M N NOTES : 1. Dimen s io n s “A ”, “B” d o n o t in clu d e mo ld flas h o r p ro tru s io n s . Maximu m mo ld flas h o r p ro tru s io n s 0.25 mm (0.010) p er s id e.