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LT1072HVCK Datasheet(PDF) 11 Page - Linear Technology |
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LT1072HVCK Datasheet(HTML) 11 Page - Linear Technology |
11 / 16 page 11 LT1072 1072fc Positive to Negative Buck-Boost Converter External Current Limit LT1072 • TA08 D1 R1 500Ω R2 ≈ 2V VX VC GND LT1072 Voltage Boosted Boost Converter LT1072 • TA09 D2 D1 TOTAL INDUCTANCE = 8mH INTERLEAVE PRIMARY AND SECONDARY FOR LOW LEAKAGE INDUCTANCE 1 L1 N = 5 + C2 0.047µF R3 10k VIN 15V C1 200µF R4 1.5k 1/2W C3 0.68 R1 98k VOUT 100V AT 75mA R2 1.24k VIN VSW FB VC GND LT1072 + C C5 100µF* VIN 10 TO 30V *REQUIRED IF INPUT LEADS ≥ 2" **PULSE ENGINEERING 92113 †TO AVOID START-UP PROBLEMS FOR INPUT VOLTAGES BELOW 10V, CONNECT ANODE OF D3 TO VIN, AND REMOVE R5. C1 MAY BE REDUCED FOR LOWER OUTPUT CURRENTS. C1 ≈ (500µF)(IOUT). FOR 5V OUTPUTS, REDUCE R3 TO 1.5k, INCREASE C2 TO 0.3µF, AND REDUCE R6 TO 100Ω LT1072 • TA07 R4 47Ω D1 D2 1N914 C1† 1000µF C C3 2µF R5† 470Ω, 1W C C2 0.1µF D3† 1N4001 C4 5µF R6 470Ω R2 1.24k L1** 200µH R3 5k VOUT –12V AT 2A R1 10.7k VIN VSW FB VC GND LT1072 + + + TYPICAL APPLICATIO S |
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