KA7526DTF Fairchild Semiconductor, KA7526DTF Datasheet
KA7526DTF
Specifications of KA7526DTF
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KA7526DTF Summary of contents
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... Low startup and operating current • 8-Pin DIP or 8-Pin SOP Applications • Electronic ballast • SMPS ©2003 Fairchild Semiconductor Corporation www.fairchildsemi.com Descriptions The KA7526 provides simple and high performance active power factor correction. KA7526 is optimized for electronic ballast and low power, high density power supplies requiring a minimum board area, reduced component count and low power dissipation ...
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KA7526 Internal Block Diagram 36V 13V Idet 7.5V 1.8V 40k CS 4 8pF 1.65V Vmo Vm1 MULT 3 0~3.8V Pin4 Threshold(Vmo Vm1 (Vm2-Vref 2.5V Ref 5V Internal + Bias - UVLO ...
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PIN Assignments EA OUT MULT Pin Definitions Pin Number Pin Name 1 INV 2 EA OUT 3 MULT Idet 6 GND 7 OUT INV (Top View) Pin Function Description ...
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KA7526 Absolute Maximum Ratings Parameter Supply voltage Peak drive output current Driver output clamping diodes V > < -0. Detector clamping diodes Error amp(pin1,2) and Current sense (pin4) input voltage Multiplier (pin3) input voltage ...
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Electrical Characteristics Unless otherwise specified, for typical values Vcc = 12V - 125 C. perature range with Parameter UNDER VOLTAGE LOCK OUT SECTION Start threshold voltage UVLO hysteresis Supply zener voltage SUPPLY CURRENT SECTION ...
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KA7526 Electrical Characteristics Parameter CURRENT SENSE SECTION (Note2) Input offset voltage Input bias current (Note2) Current sense delay to output DETECT SECTION Detect input threshold Detect hysteresis Input low clamp voltage Input high clamp voltage Input bias current Input high/low ...
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Typical Performance Characteristics Fig1. E.A. Output Voltage vs C.S. Threshold 1.8 1.6 Vm1=4V 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -0.2 2.5 3.0 3.5 4.0 EA Output Voltage [V] Figure 1. EA Output Voltage vs C.S. Threshold Fig3. Supply ...
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KA7526 Typical Performance Characteristics Fig7. Start-up Supply Current vs Temperature 0.40 0.36 0.32 0.28 0.24 0.20 0.16 0.12 0.08 0.04 0.00 -40 - Ambient Temperature( ℃ ) Figure 7. Start-Up Supply Current vs Temperature Fig9. Sink ...
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Typical Performance Characteristics Fig.13 Idet Input Hysteresis vs Temperature 400 360 320 280 240 200 160 120 -40 - Ambient Temperature(℃) Figure 13. Idet Input Hysteresis vs Temperature Fig.15 Max. Mult. Output Voltage ...
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KA7526 Operating Description KA7526 is high performance, critical conduction, current-mode power factor controller specifically designed for use in off-line active preconverters with minimal external components. This device provides the necessary features which are required to significantly enhance poor power factor ...
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Error Amplifier An Error Amplifier with access to the inverting input and output is provided. The noninverting input is internally biased at 2.5V and is not pinned out. The output voltage of the power factor converter is typically divided down ...
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KA7526 Current Sense Comparator The current sense comparator adopt the RS latch configuration to ensure that only a single pulse appears at the drive output during a given cycle. MOSFET drain current is converted to voltage using an external sense ...
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Zero Current Detector KA7526 operates as a critical conduction current mode controller. The power MOSFET is turned on by the zero current detector and turned off when the peak inductor current reaches the threshold level established by the multiplier output. ...
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KA7526 Component Listing (for Application circuit #1) Reference R1, 2 1.2M -F, 1/ R6, 13 180k -F, 1/4W R10 820k -F, 1/4W R11 R12, 17, 18 390k -J, 1/4W R14 C2, ...
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Application Circuit #2 < 265V Input, 400V , 32W¥2 Lamps External-oscillating Ballast > Fuse Input PFC Output + C9 To Full-wave Rectified Output R12 C10 Full-wave Rectified Output D6 ...
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KA7526 Component Listing (for Application Circuit #2) Reference R1 2.2M -F, 1/4W R2 12k -F, 1/4W R3, 12 150k R4 22k -J, 1/4W R5, 10 1.2M -F, 1/4W R9 10k R13 22k -F, 1/4W R14 180k ...
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Mechanical Dimensions Package 6.40 0.20 0.252 0.008 # 7.62 0.300 Dimensions in millimeters 8-DIP 5.08 MAX 0.200 3.40 0.33 0.20 MIN 0.013 0.134 0.008 KA7526 3.30 0.30 0.130 0.012 17 ...
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KA7526 Mechanical Dimensions Package 18 (Continued) Dimensions in millimeters 8-SOP ...
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Ordering Information Product Number Package KA7526 8-DIP KA7526D 8-SOP Operating Temperature -25 ~ +125 C KA7526 19 ...
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... KA7526 DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. ...