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KA7500C Dataheets PDF



Part Number KA7500C
Manufacturers Fairchild
Logo Fairchild
Description SMPS Controller
Datasheet KA7500C DatasheetKA7500C Datasheet (PDF)

KA7500C — SMPS Controller April 2009 KA7500C SMPS Controller Features ƒ Internal Regulator Provides a Stable 5V Reference Supply Trimmed to ±1% Accuracy ƒ Uncommitted Output TR for 200mA Sink or Source Current 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 On-Chip Oscillator with Master or Slave Operation ƒ Internal Circuit Prohibits Double Pulse at Either Output Description The KA7500C is used for th.

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KA7500C — SMPS Controller April 2009 KA7500C SMPS Controller Features ƒ Internal Regulator Provides a Stable 5V Reference Supply Trimmed to ±1% Accuracy ƒ Uncommitted Output TR for 200mA Sink or Source Current 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 On-Chip Oscillator with Master or Slave Operation ƒ Internal Circuit Prohibits Double Pulse at Either Output Description 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 (VREF) 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 KA7500C KA7500CD KA7500CDTF -25 to +85°C Eco Status RoHS Package Packing Method 16-Lead Dual Inline Package (DIP) 16-Lead Small Outline Package (SOP) 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 Block Diagram Figure 1. Block Diagram © 2003 Fairchild Semiconductor Corporation KA7500C • Rev. 1.0.2 2 www.fairchildsemi.com KA7500C — SMPS Controller Typical Application VI =10V to 40V KSA1010 1mH, 2A V O =5V IO =1A 47 Ω 150 Ω 1MΩ 0.1µF 50µF 10V + 12 VC C 11 C2 8 3 -2 C1 COMP INPUT 5.1KΩ VR EF 14 KA7500C 5.1KΩ - 15 D.T GND E1 4 7 9 E2 O.C 10 13 +1 150 Ω + 16 RT CT 6 5 5.1KΩ + 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 3 www.fairchildsemi.com KA7500C — SMPS Controller 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 VCC VC IO VIN PD TOPR TSTG TJ Parameter Supply Voltage Collector Supply Voltage Output Current Amplifier Input Voltage Power Dissipation KA7500C KA7500CD Operation Temperature Range Storage Temperature Rang Junction Temperature Min. -25 -65 Max. 42 42 250 VCC + 0.3 1 0.9 +85 +150 +125 Unit V V mA V W °C °C °C Recommended Operating Conditions The Recommended Operating Conditions table defines the conditions for actual dev.


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