SI824X Datasheet, PDF (17/30 Pages) Silicon Laboratories – CLASS D AUDIO DRIVER WITH PRECISION DEAD-TIME GENERATOR

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.
Part Number
Si8241
Si8244
Table 9. Si824x Family Overview
Configuration
UVLO Voltage
High-Side/Low-Side
High-Side/Low-Side
8 V/10 V
8 V/10 V
Programmable
Dead Time


Inputs
PWM
PWM
Peak Output
Current (A)
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
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.
X
Unpowered X
L
L
Output returns to input state within 7 µs of VDDI
power restoration.
X
Powered
H
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. 1.0
17