SI8220 SILABS [Silicon Laboratories], SI8220 Datasheet - Page 13

• Manufacturer Part Number: SI8220
• Description: 0.5 AND 2.5 AMP ISODRIVERS WITH OPTO INPUT (2.5, 3.75, AND 5.0 KVRMS)
• Manufacturer: SILABS [Silicon Laboratories]

5.3. Under Voltage Lockout (UVLO)
The UVLO circuit unconditionally drives V
through 11, upon power up, the Si8220/21 is maintained in UVLO until VDD rises above VDD
down, the Si8220/21 enters UVLO when VDD falls below the UVLO threshold plus hysteresis (i.e., VDD < VDD
– VDD
Figure 8. Si8220/21 UVLO Response (5 V)
Figure 9. Si8220/21 UVLO Response (8 V)
6.0
3.5
HYS
6.5
).
4.0
Supply Voltage (V
Supply Voltage (V
7.0
4.5
7.5
5.0
8.0
5.5
DD
DD
8.5
6.0
- V
V
- V
DDUV+
V
DDUV+
SS
SS
9.0
6.5
(Typ)
) (V)
) (V)
(Typ)
9.5 10.0
7.0
O
low when V
7.5
Rev. 0.22
DD
Figure 11. Si8220/21 UVLO Response (12.5 V)
is below the lockout threshold. Referring to Figures 8
Figure 10. Si8220/21 UVLO Response (10 V)
11.3
8.5
11.8
9.0
Supply Voltage (V
Supply Voltage (V
12.3 12.8 13.3 13.8 14.3 14.8 15.3
9.5
10.0 10.5 11.0 11.5 12.0 12.5
DD
DD
- V
- V
Si8220/21
V
DDUV+
SS
SS
V
DDUV+
UV+
) (V)
) (V)
(Typ)
(Typ)
. During power
UV+
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