KA7500C Fairchild Semiconductor, KA7500C Datasheet

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KA7500C

Manufacturer Part Number
KA7500C
Description
IC CONTROLLER PWM SMPS 16-DIP
Manufacturer
Fairchild Semiconductor
Datasheet

Specifications of KA7500C

Pwm Type
Voltage Mode
Number Of Outputs
1
Frequency - Max
300kHz
Duty Cycle
45%
Voltage - Supply
7 V ~ 42 V
Buck
No
Boost
No
Flyback
No
Inverting
No
Doubler
No
Divider
No
Cuk
No
Isolated
No
Operating Temperature
-25°C ~ 85°C
Package / Case
16-DIP (0.300", 7.62mm)
Frequency-max
300kHz
Output Voltage
5 V
Output Current
0.25 A
Input Voltage
0.3 V to 5.3 V
Switching Frequency
300 KHz
Operating Temperature Range
- 25 C to + 85 C
Mounting Style
Through Hole
Duty Cycle (max)
45 %
Isolated/non-isolated
Isolated
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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© 2003 Fairchild Semiconductor Corporation
KA7500C • Rev. 1.0.2
KA7500C
SMPS Controller
Features
Ordering Information
Part Number
KA7500C
KA7500CD
KA7500CDTF
For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
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
Temperature Range
-25 to +85°C
Operating
Status
RoHS
Eco
16-Lead Dual Inline Package (DIP)
16-Lead Small Outline Package (SOP)
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
(V
provides a better output voltage regulation. The
operating temperature range is -25°C ~ +85°C.
REF
) is improved up to ±1% with trimming. This
Package
16-Lead DIP
16-Lead SOP
Packing Method
Tape and Reel
April 2009
www.fairchildsemi.com
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KA7500C Summary of contents

Page 1

... 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 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 ...

Page 2

... Block Diagram © 2003 Fairchild Semiconductor Corporation KA7500C • Rev. 1.0.2 Figure 1. Block Diagram 2 www.fairchildsemi.com ...

Page 3

... Typical Application V I =10V to 40V 47 Ω D.T GND 50µF 50V Figure 2. Pulse-Width Modulated Step-Down Converter © 2003 Fairchild Semiconductor Corporation KA7500C • Rev. 1.0.2 KSA1010 150 Ω 1MΩ 0.1µ COMP INPUT KA7500C E2 O 47KΩ 0.001µF 3 1mH 5.1KΩ ...

Page 4

... Reference Output Terminal REF R Timing Resistor T C Timing Capacitor T f Oscillator Frequency OSC V PWM Input Voltage (Pins 3, 4, and 13) IN_PWM © 2003 Fairchild Semiconductor Corporation KA7500C • Rev. 1.0.2 Parameter KA7500C KA7500CD Parameter Min. 0.3 1.8 0.0047 0.3 4 Min. Max. Unit 42 ...

Page 5

... Rise Time, Common Emitter Common Collector Fall Time, Common Emitter Common Collector 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 Conditions Min. (1) I =1mA, T =25°C 4.95 REF A I =1mA 4 ...

Page 6

... 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: http://www.fairchildsemi.com/packaging/. © 2003 Fairchild Semiconductor Corporation KA7500C • Rev. 1.0.2 10.10 A 9.70 9.08 8 ...

Page 7

... 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: http://www.fairchildsemi.com/packaging/. © 2003 Fairchild Semiconductor Corporation KA7500C • Rev. 1.0.2 A 19.68 18. ...

Page 8

... Fairchild Semiconductor Corporation KA7500C • Rev. 1.0.2 8 www.fairchildsemi.com ...

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