Si8244 SILABS [Silicon Laboratories], Si8244 Datasheet - Page 17

• Manufacturer Part Number: Si8244
• Description: CLASS D AUDIO DRIVER WITH PRECISION DEAD-TIME GENERATOR
• Manufacturer: SILABS [Silicon Laboratories]

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.
3.3.2. Device Behavior
Table 10 contains truth tables for the Si8241/4 families.
*Note: This truth table assumes VDDA and VDDB are powered. If VDDA and VDDB are below UVLO, see
Part Number
PWM Input
Si8241
Si8244
"3.7.2.Undervoltage Lockout" on page 20 for more information.
H
X
X
L
High-Side/Low-Side
High-Side/Low-Side
VDDI State Disable
Unpowered
Powered
Powered
Powered
Configuration
Si8241/4 (PWM Input High-Side/Low-Side) Truth Table
Table 10. Si824x Family Truth Table*
X
H
L
L
Table 9. Si824x Family Overview
UVLO Voltage
VOA
H
L
L
L
8 V/10 V
8 V/10 V
Output
VOB
Rev. 0.2
H
L
L
L
Output transition occurs after internal dead time
expires.
Output transition occurs after internal dead time
expires.
Output returns to input state within 7 µs of VDDI
power restoration.
Device is disabled.
Programmable
Dead Time


Notes
Inputs
PWM
PWM
Si824x
Peak Output
Current (A)
0.5
4.0
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