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FSCQ1565RT Datasheet(PDF) 7 Page - Fairchild Semiconductor |
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FSCQ1565RT Datasheet(HTML) 7 Page - Fairchild Semiconductor |
7 / 24 page FSCQ0765RT 7 Electrical Characteristics (Continued) (Ta=25 °C unless otherwise specified) Note: 1. These parameters is the current flowing in the Control IC. 2. These parameters, although guaranteed, are tested only in EDS (wafer test) process. 3. These parameters indicate Inductor Current. 4. These parameters, although guaranteed at the design, are not tested in mass production. Parameter Symbol Condition Min. Typ. Max. Unit Sync SECTION Sync Threshold in normal QR (H) VSH1 Vcc = 16V, Vfb = 5V 4.2 4.6 5.0 V Sync Threshold in normal QR (L) VSL1 Vcc = 16V, Vfb = 5V 2.3 2.6 2.9 V Sync Threshold in extended QR (H) VSH2 Vcc = 16V, Vfb = 5V 2.7 3.0 3.3 V Sync Threshold in extended QR (L) VSL2 Vcc = 16V, Vfb = 5V 1.6 1.8 2.0 V Extended QR enable frequency FSYH -90- kHz Extended QR disable frequency FSYL -45- kHz BURST MODE SECTION Burst Mode Enable Feedback Voltage VBEN 0.25 0.40 0.55 V Burst Mode Feedback Source Current IBFB 60 100 140 uA Burst Mode switching Time TBS VFB = 0V 1.2 1.4 1.6 ms Burst Mode Hold Time TBH VFB = 0V 1.2 1.4 1.6 ms SOFTSTART SECTION Soft start Time (Note2) TSS 18 20 22 ms CURRENT LIMIT(SELF-PROTECTION)SECTION Peak Current Limit (Note3) ILIM - 4.4 5.0 5.6 A Burst Mode Peak Current Limit (Note4) IBPK - 0.65 0.9 1.15 A TOTAL DEVICE SECTION Startup Current ISTART VCC = VSTART-0.1V - 25 50 uA Sustain Latch Current ISL VCC = VSTOP-0.1V - 50 100 uA Operating Supply Current (Note1) - In normal operation - In burst mode (without switching) IOP Vfb = 2V, VCC = 18V - 4 6 mA IOB Vfb = GND, VCC = 18V - 0.25 0.50 mA |
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