Description. Eco Status. KA7500C 16-Lead Dual Inline Package (DIP) Tube. -25 to +85 C RoHS 16-Lead Small Outline Package (SOP)
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1 KA7500C SMPS Controller Features Internal Regulator Provides a Stable 5V Reference Supply Trimmed to ±1% Accuracy Uncommitted Output TR for 200mA Sink or Source Current Output Control for Push-Pull or Single-Ended Operation Variable Duty Cycle by Dead-Time Control (Pin 4) Complete PWM Control Circuit On-Chip Oscillator with Master or Slave Operation Internal Circuit Prohibits Double Pulse at Either Output Description April 2009 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. This device can be operated in the switching frequency of 1kHz to 300kHz. The precision of voltage reference (V REF) is improved up to ±1% with trimming. This provides a better output voltage regulation. The operating temperature range is -25 C ~ +85 C. 16-Lead DIP 16-Lead SOP Ordering Information Part Number Operating Temperature Range Eco Status Package Packing Method KA7500C 16-Lead Dual Inline Package (DIP) Tube KA7500CD KA7500CDTF -25 to +85 C RoHS 16-Lead Small Outline Package (SOP) For Fairchild s definition of Eco Status, please visit: Tube Tape and Reel KA7500C Rev
2 Block Diagram Figure 1. Block Diagram KA7500C Rev
3 Typical Application V I =10V to 40V 47Ω KSA1010 1mH, 2A V O =5V I O =1A 150Ω 0.1µF 1MΩ 50µF 10V + 12 V CC 11 C2 8 C1 3 COMP INPUT KΩ V REF KΩ KA7500C KΩ D.T 4 GND 7 E1 9 E2 10 O.C 13 R T 6 C T Ω + 50µF 50V 47KΩ µF 500µF 10V + GND 0.1 Figure 2. Pulse-Width Modulated Step-Down Converter KA7500C Rev
4 Absolute Maximum Ratings 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 Parameter Min. Max. Unit V CC Supply Voltage 42 V V C Collector Supply Voltage 42 V I O Output Current 250 ma V IN Amplifier Input Voltage V CC V P D Power Dissipation KA7500C 1 KA7500CD 0.9 W T OPR Operation Temperature Range C T STG Storage Temperature Rang C T J Junction Temperature +125 C 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 Parameter Min. Typ. Max. Unit V CC Power Supply Voltage V V C1, V C2 Collector Supply Voltage V I C1, I C2 Collector Output Current (Each Transition) 200 ma V IN Amplifier Input Voltage 0.3 V CC V I FB Current Into Feedback Terminal 0.3 ma I REF Reference Output Terminal 10 ma R T Timing Resistor KΩ C T Timing Capacitor µa f OSC Oscillator Frequency khz V IN_PWM PWM Input Voltage (Pins 3, 4, and 13) V KA7500C Rev
5 Electrical Characteristics V CC = 20V, f = 10kHz, T A = -25 C to +85 C, unless otherwise specified. Symbol Parameter Conditions Min. Typ. Max. Units Reference Section V REF Reference Output Voltage I REF=1mA, T A=25 C (1) I REF=1mA V R LINE Line Regulation V CC=7V to 40V 2 25 mv R LOAD Load Regulation I REF=1mA to 10mA 1 15 mv I SC Short-Circuit Output Current V REF=0V ma Oscillation Frequency f OSC Oscillation Frequency C T=0.001µF, R T=30KΩ 40.0 C T=0.01µF, R T=12KΩ, T A=25 C C T=0.01µF, R T=12KΩ, T A=T LOW to T HIGH Δf/Δt Frequency Change with Temperature C T=0.01µF, R T=12KΩ 2 % Dead-Time Control Section I BIAS Input Bias Current V CC=15V, 0V V V µa D (MAX) V ITH Maximum Duty Cycle Error Amplifier Section Input Threshold Voltage V CC=15V, V 4=0V, OC Pin=V REF khz 45 % Zero Duty Cycle Maximum Duty Cycle 0 V IO Input Offset Voltage V 3=2.5V 2 10 mv I IO Input Offset Current V 3=2.5V ma I BIAS Input Bias Current V 3=2.5V µa V CIM Common Mode Input Voltage 7V V CC 40V -0.3 V CC V G VO Open-Loop Voltage Gain 0.5V V 3 3.5V db B W Unit-Gain Bandwidth 650 khz PWM Comparator Section V ITH Input Threshold Voltage Zero Duty Cycle V I SINK Input Sink Current V 3=0.7V ma Output Section V CE(SAT) Output Saturation Voltage Common Emitter V E=0V, I C=200mA V CC(SAT) Emitter-Follower V C=15V, I E=-200mA I C(OFF) Collector Off-State Current V CC=40V, V CE=40V I E(OFF) Emitter Off-State Current V CC=V C=40V, V E=40V -100 Total Device I CC Supply Current Pin6=V REF, V CC=15V 6 10 ma Output Switching Characteristics t R Rise Time, Common Emitter, Common Collector Fall Time, Common Emitter, t F Common Collector Note: 1. This is guaranteed where the marking code of the package surface is over V V µa ns KA7500C Rev
6 Physical Dimensions B A B B #1 8 (0.30) # TOP VIEW 0.20 C B A LAND PATTERN RECOMMENDATION 1.80 MAX c 0.05 MIN (R0.20) SEE DETAIL A B SIDE VIEW 0.10 MAX C END VIEW NOTES: A) THIS DRAWING GOMPLIES WITH JEDEC MS-012 EXCEPT AS NOTED. B) THIS DEMENSION IS OUTSIDE THE JEDEC MS-012 VALUE. C) ALL DIMENSIONS ARE IN MILLIMETERS. D) DIMENSIONS ARE EXCLUSIVE OF BURRS, MOLD FLASH, AND TIE BAR EXTRUSIONS. E) LANDPATTERN STANDARD: SOIC127P600X175-16AM. F) DRAWING FILE NAME AND REVISION : M16EREV GAGE PLANE SEATING PLANE 8 Æ (R0.10) DETAIL A Figure Lead Small Outline Package (SOP) Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor s online packaging area for the most recent package drawings: KA7500C Rev
7 Physical Dimensions A (0.40) TOP VIEW MIN MAX A SIDE VIEW NOTES: UNLESS OTHERWISE SPECIFIED A THIS PACKAGE 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) CONFORMS TO ASME Y14.5M-1994 E) DRAWING FILE NAME: N16EREV1 Figure Lead Dual Inline Package (DIP Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor s online packaging area for the most recent package drawings: KA7500C Rev
8 KA7500C Rev
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