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LT1738 Datasheet(PDF) 8 Page - Linear Technology |
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LT1738 Datasheet(HTML) 8 Page - Linear Technology |
8 / 20 page 8 LT1738 1738fa VC (Pin 12): The compensation pin is used for frequency compensation and current limiting. It is the output of the error amplifier and the input of the current comparator. Loop frequency compensation can be performed with an RC network connected from the VC pin to ground. The voltage on VC is proportional to the switch peak current. The normal range of voltage on this pin is 0.25V to 1.27V. However, during slope compensation the upper clamp voltage is allowed to increase with the compensation. During a short-circuit fault the VC pin will be discharged to ground. PI FU CTIO S BLOCK DIAGRA Figure 1a. Typical Test Circuitry + VC NFB FB 1738 BD SS SLEW CONTROL VREG VIN V5 TO DRIVERS SQ FF R OSCILLATOR – + NEGATIVE FEEDBACK AMP + – ERROR AMP 1.25V 100k 50k COMP – + SENSE AMP SHDN RVSL RCSL REGULATOR RT CT CAP GATE GCL PGND SYNC GND SUB CS 4 11 6 7 8 13 9 10 14 17 5 15 16 12 20 1 2 3 Figure 1b. Test Circuit for Slew + – 5pF IN5819 20mA 2 1738 F01a ZVN3306A 10 GATE CAP + – 5pF IN5819 0.9A 0.1 1738 F01b Si4450DY 10 GATE CS CAP TEST CIRCUITS |
Similar Part No. - LT1738_15 |
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Similar Description - LT1738_15 |
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