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MB3870 Datasheet(PDF) 9 Page - Fujitsu Component Limited. |
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MB3870 Datasheet(HTML) 9 Page - Fujitsu Component Limited. |
9 / 25 page 9 MB3870 (Ta = +25 °C, VCC = 5 V) (Continued) Parameter Symbol Pin no. Condition Value Unit Min. Typ. Max. PWM comparator blocks (PWM Comp.1, 2) Threshold voltage VTL 8, 11 Duty cycle = 0% 1.3 — V VTH 8, 11 Duty cycle = Dtr — 1.86 2.0 V Dead time control block (DTC) Maximum duty cycle Dtr 8 RT = 130 k Ω 85 90 95 % Output blocks (Drive1, 2) Output voltage (main side) VOH 8 OUT1 = –100 mA, VB = 5 V, CB = 10 V, VS = 5 V CB – 2.5 CB – 1.5 —V VOL 8 OUT1 = 100 mA, VB = 5 V, CB = 10 V, VS = 5 V — VS + 1.1 VS + 1.4 V Output voltage (synchronized rectifier side) VOH 11 OUT2 = –100 mA, VB = 5 V VB – 2.5 VB – 1.5 —V VOL 11 OUT2 = 100 mA, VB = 5 V —1.1 1.4 V Diode voltage VDIODE 13 IDIODE = 10 mA — 1.0 1.1 V Control block (CTL) CTL input voltage VIH 24 IC operating mode 2.0 — 18 V VIL 24 IC standby mode 0 — 1.0 V Input current ICTL 19 CTL = 5 V — 100 160 µA PWRGOOD comparator protection block (PWRGD) Threshold voltage VTLOW 21 VD4 to VD0 setting, VSENSE = 0.88 × VD 0.90 × VD 0.92 × VD V VTHIGH 21 VD4 to VD0 setting, VSENSE = 1.08 × VD 1.10 × VD 1.12 × VD V Hysteresis voltage VH 21 — 3 30 50 mV Output leak current ILEAK 21 PWRGOOD = 5 V — — 40 µA Output voltage VOL 21 PWRGOOD = 1 mA — 0.06 0.4 V Discharge control comparator (CS Comp.) Threshold voltage VTH 24 CS = — 0.05 0.07 V Discharge control ON/OFF block (CTL LOGIC) ENB input voltage VIH 24 Discharge control ON 2.0 — 18 V VIL 24 Discharge control OFF 0— 1.0 V Input current IENB 7 ENB = 0 V –1.0 –0.05 — µA 1.2 |
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