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A3940KLP-T Datasheet(PDF) 6 Page - Allegro MicroSystems |
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A3940KLP-T Datasheet(HTML) 6 Page - Allegro MicroSystems |
6 / 12 page 3940 FULL-BRIDGE POWER MOSFET CONTROLLER 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 6 ELECTRICAL CHARACTERISTICS: unless otherwise noted at T A = -40°C to +135°C, TJ = -40°C to +150°C, V IN ≤ ≤≤≤≤ V BB = 7 V to 40 V, Cp = 0.47 µF, Cr = 1 µF, CREG5 = 0.1 µF, CREG13 = 10 µF, CBOOT = 0.1 µF, PWM = 22.5 kHz square wave. Limits Characteristics Symbol Conditions Min Typ Max Units Bootstrap Circuit Diode Forward Current Limit ICX 3 V < [(VREG13 = 13.5 V) - VCX] < 12 V 140 – 1000 mA Diode Forward Drop VF IF = 10 mA 0.8 – 2.0 V Diode Resistance RF RF(100) = [VF(150) - VF(50)]/100 1.5 – 6.5 Ω Top-off CP Source Current at Cx Icx VCX - VSX = 8 V, VBB = 40 V, GHx = 1(no load) 40 – – µA Fault Logic VBB Undervoltage V BB(uv) Decreasing V BB 4.5 5.25 6.0 V VBB Undervoltage Hysteresis ∆V BB(uv) V BB(recovery) - VBB(uv) 200 450 700 mV VREG13 Undervoltage V REG13(uv) Decreasing V IN 7.5 8.25 9.0 V VREG13 Undervoltage Hyst. ∆V REG13(uv) V REG13(recovery) - VREG13(uv) 200 450 700 mV VBB Overvoltage V BB(ov) Increasing V BB, FAULT = 0 to 1, VOVSET = 0 V 16 19.6 22 V Increasing V BB, FAULT = 0 to 1, VOVSET = 0.45 V 24 28 30.5 V Increasing V BB, FAULT = 0 to 1, VOVSET = 0.9 V 32.5 36.4 39 V VBB Overvoltage Hysteresis ∆V BB(ov) V BB(ov) - VBB(recovery) 2.1 3.1 4.1 V OVSET Input Current I SET(ov) 0 V < V SET(ov) < 0.9 V – – 1.4 µA VDSTH Input Current I DSTH 0.3 V < V DSTH < 3 V – – 1.0 µA Short-to-Ground Threshold V STG(th) V DSTH = 0.3 V V DSTH-0.14 – V DSTH+0.10 V V DSTH = 1.0 V V DSTH-0.18 – V DSTH+0.13 V V DSTH = 3.0 V V DSTH-0.39 – V DSTH+0.26 V Short-to-Battery Threshold V STB(th) V DSTH = 0.3 V V DSTH-0.20 – V DSTH+0.30 V V DSTH = 1.0 V V DSTH-0.24 – V DSTH+0.30 V V DSTH = 3.0 V V DSTH-0.37 – V DSTH+0.30 V V DRAIN /Open Bridge Threshold V DO(th) If V DRAIN < VDO(th), FAULT = 0 to 1 1.0 – 3.0 V V DRAIN /Open Bridge Current I VDRAIN RESET = 0 – – 1.0 µA RESET = 1, V DSTH < 3 V – – 500 µA Fault Latch Clear Pulsewidth t latch RESET = 0, pulse 0.15 – 2.0 µs Fault Clear Propagation Delay t pd From RESET = 1 to FAULT = 0 – 2.0 – µs Fault Detection Noise Filter t noise – 1.7 – µs Fault Output V out(0) I out = 5 mA, faults negated – – 0.4 V I out(1) V out = 5 V, open-drain, fault asserted – – 1.0 µA Thermal Shutdown Temperature T J T J increasing – 172 – °C Thermal Shutdown Hysteresis ∆T J T J decreasing – 12 – °C NOTES: Typical Data is for design information only. Negative current is defined as coming out of (sourcing) the specified device terminal. y |
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