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SI88X4X 数据表(PDF) 5 Page - Silicon Laboratories |
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SI88X4X 数据表(HTML) 5 Page - Silicon Laboratories |
5 / 48 page Si88x4x Preliminary Rev. 0.6 5 No Load Supply Current IDDP Si8844x, Si8864x IDDPQ_DCDC3 See Figure 3 VIN = 24 V — 0.8 — mA No Load Supply Current IDDA Si8844x, Si8864x IDDAQ_DCDC4 See Figure 3 VIN = 24 V — 5.8 — mA Peak Efficiency Si8824x, Si8834x Si8844x, Si8864x See Figure 2, 3 — 78 83 —% Voltage Regulator Refer- ence Voltage Si8844x, Si8864x VREGA, VREGB IREG = 600 μA See Figure 30 for typical I–V curve — 4.8 — V VREG tempco KTVREG — –0.43 — mV/°C VREG input current IREG 350 — 950 μA Soft Start Time, Full Load Si8824x, Si8844x Si8834x, Si8864x tSST See Figures 25 through 28 for typical soft start times over load conditions. — 25 50 —ms Restart Delay from fault event tOTP — 21 — s Digital Isolator VDD Undervoltage Threshold VDDUV+ VDDA, VDDB rising — 2.7 — V VDD Undervoltage Threshold VDDUV– VDDA, VDDB falling — 2.6 — V VDD Undervoltage Hysteresis VDDHYS — 100 — mV Positive-Going Input Threshold VT+ All inputs rising — 1.67 — V Table 2. Electrical Characteristics1 (Continued) VIN = 24 V; VDDA = 4.3 V (see Figure 3) for all Si8844x/64x; VDDA = VDDP = 3.0 to 5.5 V (see Figure 2) for all Si8824x/34x; TA = –40 to 125 °C unless otherwise noted Parameter Symbol Test Condition Min Typ Max Unit Notes: 1. Over recommended operating conditions as noted in Table 1. 2. VOUT = VSNS x (1 + R1/R2) + R1 x Ioffset 3. VDDP current needed for dc-dc circuits. 4. VDDA current needed for dc-dc circuits. 5. The nominal output impedance of an isolator driver channel is approximately 50 , ±40%, which is a combination of the value of the on-chip series termination resistor and channel resistance of the output driver FET. When driving loads where transmission line effects will be a factor, output pins should be appropriately terminated with controlled impedance PCB traces. 6. tPSK(P-P) is the magnitude of the difference in propagation delay times measured between different units operating at the same supply voltages, load, and ambient temperature. 7. Start-up time is the time period from when the UVLO threshold is exceeded to valid data at the output. |
类似零件编号 - SI88X4X |
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类似说明 - SI88X4X |
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