 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| www.fairchildsemi.com 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 The KA7500C is used for the control circuit of the pulse width 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 (Vref) is improved up to 1% with trimming. This provides a better output voltage regulation. The operating temperature range is -25C ~ +85C. 16-DIP 16-SOP 1 1 Internal Block Diagram OUTPUT CONTROL 13 RT CT 6 OSCILLATOR 5 D Q 9 E1 8 C1 11 C2 DEAD 4 TIME CONTROL CK 1.2V Q 10 E2 PWM COMP EA(+) 1 EA(-) 2 5V 12 VCC + _1 0.7MA 2 BAND GAP REFERENCE 14 VREF EA(+) 16 EA(-) 15 + _ 7 GND 3 COMP INPUT Rev. 1.0.1 (c)2003 Fairchild Semiconductor Corporation KA7500C Absolute Maximum Ratings Parameter Supply Voltage Collector Supply Voltage Output Current Amplifier Input Voltage Power Dissipation (TA = 25C) Operating Temperature Range Storage Temperature Range Junction Temperature Symbol VCC VC IO VIN PD TOPR TSTG Tj Value 42 42 250 VCC +0.3 1 (KA7500C) 0.9 (KA7500CD) -25 ~ +85 -65 ~ +150 125 Unit V V mA V W C C C Recommended Operating Conditions Parameter Power Supply Voltage Collector Output Voltage Collector Output Current (Each Transistor) Amplifier Input Voltage Current Into Feedback Terminal Reference Output Current Timing Resistor Timing Capacitor Oscillator Frequency PWM Input Voltage (Pins3, 4, 13) Symbol VCC VC1,VC2 IC1,IC2 VIN Ifb Iref RT CT fosc Min. 7.0 0.3 1.8 0.0047 1.0 0.3 Typ. 15 30 30 0.001 40 Max. 40 40 200 VCC-2.0 0.3 10 500 10 200 5.3 Unit V V mA V mA mA uF kHz V 2 KA7500C Electrical Characteristics (VCC = 20V, f = 10kHz, TA = -25C to +85C, unless otherwise specified) Parameter REFERENCE SECTION Reference Output Voltage Line Regulation Load Regulation Short Circuit Output Current OSCILLATOR SECTION CT = 0.001F, RT = 30K Oscillation Frequency fosc CT = 0.001F, RT = 12K,TA=25C CT = 0.001F, RT = 30K, TA=Tlow to Thigh CT = 0.01F, RT = 12K 9.2 9.0 40 10 10.8 12 2 % kHz VREF RLine RLOAD ISC IREF = 1mA, TA=25C(Note1) IREF = 1mA VCC = 7V to 40V IREF = 1mA to 10mA VREF = 0V 4.95 4.9 10 5.0 5.0 2.0 1.0 35 5.05 5.1 25 15 50 V mV mV mA Symbol Conditions Min. Typ. Max. Unit Frequency Change with Temperature DEAD TIME CONTROL SECTION Input Bias Current Maximum Duty Cycle Input Threshold Voltage ERROR AMP SECTION Input Offset Voltage Input Offset Current Input Bias Current Common Mode Input Voltage Open-Loop Voltage Gain Unit-Gain Bandwidth PWM COMPARATOR SECTION Input Threshold Voltage Input Sink Current OUTPUT SECTION Output Saturation Voltage Common Emitter f/T IBIAS D(MAX) VITH VCC = 15V, 0V V4 5.25V VCC = 15V, V4 = 0V O.C Pin = VREF Zero Duty Cycle Max. Duty Cycle V3 = 2.5V V3 = 2.5V V3 = 2.5V 7V VCC 40V 0.5V V3 3 .5V Zero Duty Cycle V3 = 0.7V 45 0 -0.3 70 -0.3 -2.0 3.0 2.0 25 0.2 95 650 4 -0.7 -10 3.3 10 250 1.0 VCC 4.5 - A % V VIO IIO IBIAS VCM GVO BW VITH ISINK mV mA A V dB kHz V mA VCE(SAT) VE = 0V, IC = 200mA - 1.1 1.3 V 3 KA7500C Electrical Characteristics (Continued) (VCC = 20V, f = 10kHz, TA = -25C to +85C, unless otherwise specified) Parameter Emitter-Follower Collector Off-State Current Emitter Off-State Current TOTAL DEVICE Supply Current OUTPUT SWITCHING CHARACTERISTIC Rise Time Common Emitter, Common Collector Fall Time Common Emitter, Common Collector tR tF 100 25 200 100 ns ns ICC Pin 6 = VREF, VCC = 15V 6 10 mA Symbol VCC(SAT) IC(OFF) IE(OFF) Conditions VC = 15V, IE = -200mA VCC = 40V, VCE = 40V VCC = VC = 40V, VE = 0V Min. Typ. 1.5 2 Max. 2.5 100 -100 Unit V A - Note : 1. This is guaranteed where the marking code of the package surface is over 027 4 KA7500C Typical Application Pulse Width Modulated Step-down Converter VI =10V to 40V KSA1010 1mH, 2A VO=5V IO=1A 47 150 0.1uF 1M 50uF 10V + 12 VCC 11 C2 8 C1 3 COMP INPUT -2 VREF 14 5.1K 5.1K KA7500C - 15 5.1K +1 150 D.T 4 GND 7 E1 9 E2 10 O.C 13 RT 6 CT 5 + 16 + 50uF 50V 47K + 0.001uF 500uF 10V + GND 0.1 5 KA7500C Mechanical Dimensions Package Dimensions in millimeters 16-SOP MIN 1.55 0.10 0.061 0.004 #1 #16 10.30 MAX 0.405 9.90 0.20 0.39 0.008 #8 #9 6.00 0.30 0.236 0.012 3.95 0.20 0.156 0.008 1.80 MAX 0.071 +0.004 0.008 -0.002 0.20 5.72 0.225 0.70 0.20 0.0275 0.008 6 0~ 8 MAX0.10 MAX0.004 +0.10 -0.05 1.27 0.050 +0.004 0.016 -0.002 +0.10 0.406 -0.05 ( 0.51 ) 0.020 0.05 0.002 KA7500C Mechanical Dimensions (Continued) Package Dimensions in millimeters 16-DIP 0.81 ) 0.032 #16 ( #1 6.40 0.20 0.252 0.008 19.80 MAX 0.780 19.40 0.20 0.764 0.008 #8 #9 7.62 0.300 3.25 0.20 0.128 0.008 0.38 0.014 MIN 5.08 MAX 0.200 3.30 0.30 0.130 0.012 0~15 0.25 -0.05 0.010 -0.002 +0.004 +0.10 2.54 0.100 0.46 0.10 0.018 0.004 1.50 0.10 0.059 0.004 7 KA7500C Ordering Information Product Number KA7500C KA7500CD Package 16-DIP 16-SOP Operating Temperature -25 ~ +85C 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. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. www.fairchildsemi.com 5/9/03 0.0m 001 Stock#DSxxxxxxxx 2003 Fairchild Semiconductor Corporation 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. |
Price & Availability of KA7500C
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |