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SI88X4X 数据表(PDF) 5 Page - Silicon Laboratories

部件名 SI88X4X
功能描述  Precise timing on digital isolators
Download  48 Pages
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制造商  SILABS [Silicon Laboratories]
网页  http://www.silabs.com
标志 SILABS - Silicon Laboratories

SI88X4X 数据表(HTML) 5 Page - Silicon Laboratories

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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.


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