Si824x
3.3. Family Overview and Logic Operation During Startup
The Si824x 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. Si824x Family Overview
Part Number
Configuration
UVLO Voltage
Programmable
Dead Time
Inputs
Peak Output
Current (A)
Si8241
Si8244
High-Side/Low-Side
High-Side/Low-Side
8 V/10 V
8 V/10 V
PWM
PWM
0.5
4.0
3.3.2. Device Behavior
Table 10 contains truth tables for the Si8241/4 families.
Table 10. Si824x Family Truth Table*
Si8241/4 (PWM Input High-Side/Low-Side) Truth Table
Output
PWM Input
VDDI State Disable
Notes
VOA
VOB
Output transition occurs after internal dead time
expires.
H
L
Powered
Powered
L
L
H
L
Output transition occurs after internal dead time
expires.
L
H
Output returns to input state within 7 µs of VDDI
power restoration.
X
X
Unpowered
Powered
X
H
L
L
L
L
Device is disabled.
*Note: This truth table assumes VDDA and VDDB are powered. If VDDA and VDDB are below UVLO, see
"3.7.2.Undervoltage Lockout" on page 20 for more information.
Rev. 0.2
17
SILICON [ SILICON ]
