SI88X2X Datasheet, PDF (5/45 Pages) Silicon Laboratories – Isolation of up to 5000 Vrms

Si88x2x
Table 2. Electrical Characteristics¹ (Continued)
V_IN = 24 V; V_DDA = V_DDP = 3.0 to 5.5 V (see Figure 2) for all Si8822x/32x; V_DDA = 4.3 V (see Figure 3) for all Si8842x/62x;
T_A = –40 to 125 °C unless otherwise noted.
Parameter
No Load Supply Cur-
rent IDDP
Si8842x, Si8862x
No Load Supply Cur-
rent IDDA
Si8842x, Si8862x
Symbol
IDDPQ_DCDC³
IDDAQ_DCDC⁴
Test Condition
See Figure 3
VIN = 24 V
See Figure 3
VIN = 24 V
Min Typ Max Unit
0.8
mA
5.8
mA
Peak Efficiency

Si8822x, Si8832x
Si8842x, Si8862x
See Figure 2
See Figure 3
%
78
83
Voltage Regulator
VREGA, VREGB
I_REG = 600 µA
4.8
V
Reference Voltage
See Figure 24 for typical I–V
Si8842x, Si8862x
curve
VREG tempco
K_TVREG
–0.43
mV/°C
VREG input current
I_REG
350
—
950
µA
Soft start time,
t_SST
See Figures 19–22 for typical
ms
full load
soft start times over load con-
Si8822x, Si8842x
ditions.
25
Si8832x, Si8862x
50
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
VDD_HYS
100
mV
Positive-Going Input
VT+
Threshold
All inputs rising
1.67
V
Notes:
1. Over recommended operating conditions as noted in Table 1.
2. VOUT = VSNS x (1 + R1/R2) + R1 x I_offset
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.
Rev. 0.5
5