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LT3782 Datasheet(PDF) 3 Page - Linear Technology |
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LT3782 Datasheet(HTML) 3 Page - Linear Technology |
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3 / 20 page  LT3782 3 3782fg The ● denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TA = 25°C. VCC = 13V, RSET = 80k, no load on any outputs, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS Overall Supply Voltage (VCC) l 640 V Supply Current (IVCC)VC ≤ 0.5V (Switching Off), VCC ≤ 40V 11 16 mA Shutdown RUN Threshold l 2.3 2.45 2.6 V RUN Threshold Hysteresis 80 mV Supply Current in Shutdown 1V ≤ RUN ≤ VREF, VCC ≤ 30V RUN ≤ 0.3V, VCC ≤ 30V 0.4 40 0.65 90 mA μA RUN Pin Input Current VRUN = 2.3V l –0.5 –2 μA Voltage Amplifier gm Reference Voltage (VREF) l 2.42 2.4 2.44 2.464 2.488 V V Transconductance VVC = 1V, ΔIVC = ±2μA l 200 260 370 μmho Input Current IFB VFB = VREF l 0.2 0.6 μA VC High IVC = 0 1.5 V VC Low IVC = 0 0.35 0.4 V Source Current IVC VVC = 0.7V – 1V, VFB = VREF – 100mV 8 11 14 μA Sink Current IVC VVC = 0.7V – 1V, VFB = VREF + 100mV 13 20 28 μA VC Threshold for Switching Off (BGATE1, BGATE2 Low) l 0.3 V Soft-Start Current ISS VSS = 0.1V – 2.8V 6 10 15 μA Current Amplifier CA1, CA2 Voltage Gain ΔVC /ΔVSENSE 4 Current Limit (VSENSE1+ – VSENSE1–) (VSENSE2+ – VSENSE2–) 506280 mV Input Current (ISENSE1+, ISENSE1–, ISENSE2+, ISENSE2–)ΔVSENSE = 0V 60 μA Oscillator Switching Frequency RSET = 130k RSET = 80k RSET = 40k l l l 130 212 386 154 250 465 177 288 533 kHz kHz kHz Synchronization Pulse Threshold on SYNC Pin Rising Edge VSYNC 0.8 1.2 2 V Synchronization Frequency Range (Note: Operation Switching Frequency Equals Half of the Synchronization Frequency) RSET = 130k RSET = 80k RSET = 40k 180 290 550 240 392 715 kHz kHz kHz VRSET RSET = 80k 2.3 V Maximum Duty Cycle VFB = VREF – 25mV, RSET > 80k RSET = 40k l l 90 83 94 90 % % Duty Cycle Limit RSET = 80k, VDCL ≤ 0.3V VDCL = 1.2V VDCL = VRSET 50 75 Max Duty Cycle % % DCL Pin Input Current VDCL ≤ 0.3V l –0.1 –0.3 μA ELECTRICAL CHARACTERISTICS |
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