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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.
IL34262
ORDERING INFORMATION IL34262N Plastic IL34262D 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
IL34262
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 = 70C Thermal Resistance, Junction-to-Air D Suffix, Plastic Package Maximum Power Dissipation @ TA = 70C Thermal Resistance, Junction-to-Air Operating Junction Temperature Operating Ambient Temperature Storage Temperature PD RJA
TJ
Symbol
(Icc + Iz) lo Vin Iin
Value
30 500 -1.0 to +10 50 -10
Unit
mA mA V mA
PD RJA
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=25C TA = Tlow to Thigh (Vcc = 12 V to 28 V) Line Regulation (VCC = 12 V to 28 V, TA = 25C) Input Bias Current (VFB = 0 V) Transconductance (TA = 25C) 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 A mho A
IL34262
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 A 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 A 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
--
s
Note 1: This parameter is measured with VFB =0V, and VPin3=3.0V
IL34262
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
IL34262

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 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 19 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 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 approximately 0.989. The input current and voltage waveforms of Figure 20 are shown in Figure 22 with operation at 115 Vac and 230 Vac. The data for each of the applications was generated with the test set-up shown in Figure 24.
IL34262
80W Power Factor Controller
IL34262
175W Universal Input Power Factor Controller
IL34262
450W Universal Input Power Factor Controller
IL34262
N SUFFIX PLASTIC DIP (MS - 001BA)
A 8 5 B 1 4
Dimension, 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
PLANE
F G
M H J
N G D 0.25 (0.010) M T K
H J K L M N
NOTES: 1. Dimensions "A", "B" do not include mold flash or protrusions. Maximum mold flash or protrusions 0.25 mm (0.010) per side.

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