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LT1246CN8 Datasheet(PDF) 10 Page - Linear Technology |
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LT1246CN8 Datasheet(HTML) 10 Page - Linear Technology |
10 / 12 page LT1246/LT1247 10 Adjustable Clamp Level with Soft Start Soft Start External Clock Synchronization LT1246 • TA06 R VREF FEEDBACK COMP ISENSE C + – + – 1 2 2.5V 2R R 1V 1.5V – + 3 1mA 5.6V 8 5V REF LT1246 • TA07 FEEDBACK COMP RT/CT VREF VIN RS R2 C R1 VCLAMP ≈ 1.67 R2 + 1 R1 ( ( IPK (MAX) ≈ VCLAMP RS WHERE: O ≤ V CLAMP ≤ 1.0V tSOFT START = –ln 1 – VC C R1 R2 3 • VCLAMP R1 + R2 ISENSE + – + – 2 2.5V 2R R 1V 1.5V – + BLANKING 1mA 5.6V 4 OSCILLATOR R S 18V 7 VCC UV LOCKOUT 5 GND 6 OUTPUT 5V REF MAIN BIAS REFERENCE PULLDOWN OUTPUT PULLDOWN REFERENCE ENABLE 1 8 3 100k LT1246 • TA05 5V REF OSCILLATOR EXTERNAL SYNC INPUT 0.01 µF 47 Ω CT D1 RT RT/CT VREF D1 IS REQUIRED IF THE SYNC AMPLITUDE IS LARGE ENOUGH TO PULL THE BOTTOM OF CT MORE THAN 300mV BELOW GROUND. 8 4 S APPLICATI TYPICAL |
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