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SI88320BD-IS Fiches technique(PDF) 3 Page - Silicon Laboratories |
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SI88320BD-IS Fiches technique(HTML) 3 Page - Silicon Laboratories |
3 / 45 page Si88x2x Rev. 0.5 3 1. Electrical Specifications Table 1. Recommended Operating Conditions Parameter Symbol Min Typ Max Unit Ambient Operating Temperature TA –4025125 °C Power Input Voltage VDDP 3.0 — 5.5 V Supply Voltage VDDA 3.0 — 5.5 V VDDB 3.0 — 5.5 V Table 2. Electrical Characteristics1 VIN =24 V; VDDA =VDDP = 3.0 to 5.5 V (see Figure 2) for all Si8822x/32x; VDDA = 4.3 V (see Figure 3) for all Si8842x/62x; TA = –40 to 125 °C unless otherwise noted. Parameter Symbol Test Condition Min Typ Max Unit DC/DC Converter Switching Frequency Si8822x, Si8842x FSW 250 kHz Switching Frequency Si8832x, Si8862x FSW RFSW = 23.3 k FSW = 1025.5/(RFSW x CSS) CSS = 220 nF (see Figure 9) (1% tolerance on BOM) 180 200 220 kHz RFSW = 9.3 k FSW = 1025.5/(RFSW x CSS) CSS = 220 nF (see Figure 9) (1% tolerance on BOM) 450 500 550 kHz RFSW = 5.18 k , CSS = 220 nF (see Figure 9) 810 900 990 kHz VSNS voltage VSNS ILOAD = 0 A 1.002 1.05 1.097 V VSNS current offset Ioffset –500 — 500 nA Output Voltage Accuracy2 See Figure 2 ILOAD = 0 mA –5 — +5 % 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. |
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