KA7500CDTF

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This literature is subject to all applicable copyright laws and is not for resale in any manner. KA7500C SMPS Controller Features Description ƒ Internal Regulator Provides a Stable 5V Reference Supply Trimmed to ±1% Accuracy ƒ Uncommitted Output TR for 200mA Sink or Source Current The KA7500C is used for the control circuit of the pulsewidth modulation switching regulator. The KA7500C consists of 5V reference voltage circuit, two error amplifiers, flip flop, an output control circuit, a PWM comparator, a dead-time comparator, and an oscillator. ƒ Output Control for Push-Pull or Single-Ended Operation ƒ Variable Duty Cycle by Dead-Time Control (Pin 4) Complete PWM Control Circuit ƒ ƒ On-Chip Oscillator with Master or Slave Operation This device can be operated in the switching frequency of 1kHz to 300kHz. The precision of voltage reference (VREF) is improved up to ±1% with trimming. This provides a better output voltage regulation. The operating temperature range is -25°C ~ +85°C. Internal Circuit Prohibits Double Pulse at Either Output 16-Lead DIP 16-Lead SOP Ordering Information Part Number Operating Temperature Range Eco Status KA7500C KA7500CD Package 16-Lead Dual Inline Package (DIP) -25 to +85°C KA7500CDTF RoHS 16-Lead Small Outline Package (SOP) Packing Method Tube Tube Tape and Reel For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. © 2003 Fairchild Semiconductor Corporation KA7500C • Rev. 1.0.2 www.fairchildsemi.com KA7500C — SMPS Controller April 2009 KA7500C — SMPS Controller Block Diagram Figure 1. Block Diagram © 2003 Fairchild Semiconductor Corporation KA7500C • Rev. 1.0.2 www.fairchildsemi.com 2 KA7500C — SMPS Controller Typical Application KSA1010 V I =10V to 40V V O =5V I O =1A 1mH, 2A 47 Ω 150 Ω 0.1µF 12 VC C 11 C2 8 C1 1MΩ 50µF 10V + -2 3 COMP INPUT 5.1KΩ V R EF 14 5.1KΩ - 15 KA7500C 5.1KΩ +1 150 Ω D.T 4 GND 7 E1 9 E2 10 O.C 13 CT 5 RT 6 + 16 + 50µF 50V 47KΩ + 0.001µF 500µF 10V + GND 0.1 Figure 2. Pulse-Width Modulated Step-Down Converter © 2003 Fairchild Semiconductor Corporation KA7500C • Rev. 1.0.2 www.fairchildsemi.com 3 Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Symbol VCC Parameter Min. Max. Unit 42 V Supply Voltage VC Collector Supply Voltage 42 V IO Output Current 250 mA VIN Amplifier Input Voltage VCC + 0.3 V PD Power Dissipation KA7500C 1 KA7500CD W 0.9 TOPR Operation Temperature Range -25 +85 °C TSTG Storage Temperature Rang -65 +150 °C +125 °C TJ Junction Temperature KA7500C — SMPS Controller Absolute Maximum Ratings Recommended Operating Conditions The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol VCC VC1, VC2 IC1, IC2 Parameter Power Supply Voltage Typ. Max. Unit 7 15 40 V 30 40 V Collector Supply Voltage Collector Output Current (Each Transition) VIN Amplifier Input Voltage IFB Current Into Feedback Terminal IREF Reference Output Terminal RT Timing Resistor CT Timing Capacitor fOSC Oscillator Frequency VIN_PWM Min. 0.3 PWM Input Voltage (Pins 3, 4, and 13) © 2003 Fairchild Semiconductor Corporation KA7500C • Rev. 1.0.2 200 mA VCC - 2.0 V 0.3 mA 10 mA 1.8 30.0 500.0 KΩ 0.0047 0.0010 10.0000 µA 1 40 200 kHz 5.3 V 0.3 www.fairchildsemi.com 4 VCC = 20V, f = 10kHz, TA = -25°C to +85°C, unless otherwise specified. Symbol Parameter Conditions Min. Typ. Max. IREF=1mA, TA=25°C 4.95 5.00 5.05 IREF=1mA 4.90 5.00 5.10 Units Reference Section (1) V VREF Reference Output Voltage RLINE Line Regulation VCC=7V to 40V 2 25 mV RLOAD Load Regulation IREF=1mA to 10mA 1 15 mV Short-Circuit Output Current VREF=0V 35 50 mA ISC 10 Oscillation Frequency 40.0 CT=0.001µF, RT=30KΩ fOSC Δf/Δt Oscillation Frequency Frequency Change with Temperature CT=0.01µF, RT=12KΩ, TA=25°C 9.2 CT=0.01µF, RT=12KΩ, TA=TLOW to THIGH 9.0 10.0 10.8 KA7500C — SMPS Controller Electrical Characteristics kHz 12.0 CT=0.01µF, RT=12KΩ 2 % -10 µA Dead-Time Control Section IBIAS D(MAX) VITH Input Bias Current VCC=15V, 0V≤ V4≤ 5.25V Maximum Duty Cycle VCC=15V, V4=0V, OC Pin=VREF Input Threshold Voltage -2 45 Zero Duty Cycle % 3.0 Maximum Duty Cycle 3.3 0 V Error Amplifier Section VIO Input Offset Voltage V3=2.5V 2 10 mV IIO Input Offset Current V3=2.5V 25 250 mA 1.0 µA VCC V IBIAS Input Bias Current V3=2.5V VCIM Common Mode Input Voltage 7V≤ VCC ≤ 40V -0.3 0.2 GVO Open-Loop Voltage Gain 0.5V≤ V3 ≤ 3.5V 70 BW Unit-Gain Bandwidth 95 dB 650 kHz PWM Comparator Section VITH Input Threshold Voltage Zero Duty Cycle ISINK Input Sink Current V3=0.7V 4.0 -0.3 4.5 -0.7 V mA Output Section VCE(SAT) Output Saturation Voltage Common Emitter VE=0V, IC=200mA 1.0 1.3 VCC(SAT) Emitter-Follower VC=15V, IE=-200mA 1.5 2.5 IC(OFF) Collector Off-State Current VCC=40V, VCE=40V 2 100 IE(OFF) Emitter Off-State Current VCC=VC=40V, VE=40V -100 V µA Total Device ICC Supply Current Pin6=VREF, VCC=15V 6 10 mA Output Switching Characteristics tR Rise Time, Common Emitter, Common Collector 100 200 tF Fall Time, Common Emitter, Common Collector 25 100 ns Note: 1. This is guaranteed where the marking code of the package surface is over 027. © 2003 Fairchild Semiconductor Corporation KA7500C • Rev. 1.0.2 www.fairchildsemi.com 5 10.10 9.70 9.08 8.68 16 B A 9 0.65 B 4.15 3.75 6.00 1 0.30 1.27 B 7.35 3.85 1.75 8 0.51 0.36 1.27 0.20 M C B A LAND PATTERN RECOMMENDATION TOP VIEW 1.65 1.45 R0.20 C A 1.80 MAX 0.10 C 0.05 MIN FRONT VIEW 0.36 R0.10 SEATING PLANE 0.90 0.50 DETAIL A SCALE 3:1 B SIDE VIEW NOTES: A. THIS DRAWING COMPLIES WITH JEDEC MS-012, EXCEPT AS NOTED 8° GAGE PLANE 0.303 0.153 B C. D. E. F. THIS DIMENSION IS OUTSIDE JEDEC MS-012 VALUE ALL DIMENSIONS ARE IN MILLIMETERS DIMENSIONS ARE EXCLUSIVE OF BURRS, MOLD FLASH, AND TIE BAR EXTRUSIONS LAND PATTERN STANDARD: SOIC127P600X175-16AM DRAWING FILENAME: MKT-M16Erev2 19.69 18.67 A 16 9 7.11 6.10 1 8 (0.40) B TOP VIEW 8.25 7.62 1.78 1.14 0.28 0.20 4.95 2.92 5.33 MAX 3.81 2.92 C 0.38 MIN 2.54 0.56 0.36 0.25 M C FRONT VIEW NOTES: A. CONFORMS TO JEDEC MS-001, VARIATION BB B. ALL DIMENSIONS ARE IN MILLIMETERS C. DIMENSIONS ARE EXCLUSIVE OF BURRS, MOLD FLASH, AND TIE BAR PROTRUSIONS D. DIMENSIONS AND TOLERANCES PER ASME Y14.5M-2009 E. DRAWING FILENAME: MKT-N16Erev3 10.92 SIDE VIEW ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. 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