SI8233 Datasheet, PDF (21/57 Pages) Silicon Laboratories – 0.5 AND 4.0 AMP ISODRIVERS

Si823x
3.3. Family Overview and Logic Operation During Startup
The Si823x family of isolated drivers consists of high-side, low-side, and dual driver configurations.
3.3.1. Products
Table 9 shows the configuration and functional overview for each product in this family.
Table 9. Si823x Family Overview
Part Number
Configuration
Si8230
Si8231
Si8232/7
Si8233
Si8234
Si8235/6/8
High-Side/Low-Side
High-Side/Low-Side
Dual Driver
High-Side/Low-Side
High-Side/Low-Side
Dual Driver
Overlap
Protection


—


—
Programmable
Dead Time


—


—
Inputs
VIA, VIB
PWM
VIA, VIB
VIA, VIB
PWM
VIA, VIB
Peak Output
Current (A)
0.5
0.5
0.5
4.0
4.0
4.0
3.3.2. Device Behavior
Table 10 consists of truth tables for the Si8230/3, Si8231/4, and Si8232/5/6 families.
Table 10. Si823x Family Truth Table¹
Si8230/3 (High-Side/Low-Side) Truth Table
Inputs
Output
VDDI State Disable
VIA VIB
VOA VOB
Notes
L
L
Powered
L
L
L
Output transition occurs after internal dead time
expires.
L
H
Powered
L
L
H
Output transition occurs after internal dead time
expires.
H
L
Powered
L
H
L
Output transition occurs after internal dead time
expires.
H
H
Powered
L
L
L
Invalid state. Output transition occurs after internal
dead time expires.
X²
X² Unpowered X
L
L
Output returns to input state within 7 µs of VDDI
power restoration.
X
X
Powered
H
L
L Device is disabled.
Si8231/4 (PWM Input High-Side/Low-Side) Truth Table
PWM Input
Output
VDDI State Disable
VOA VOB
Notes
H
Powered
L
H
L
Output transition occurs after internal dead time
expires.
L
Powered
L
L
H
Output transition occurs after internal dead time
expires.
X²
Unpowered X
L
L
Output returns to input state within 7 µs of VDDI
power restoration.
X
Powered
H
L
L Device is disabled.
Notes:
1. This truth table assumes VDDA and VDDB are powered. If VDDA and VDDB are below UVLO, see "3.7.2.
Undervoltage Lockout" on page 26 for more information.
2. Note that an input can power the input die through an internal diode if its source has adequate current.
Rev. 1.7
21