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SI8244CB-D-IS1

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P32
Preliminary Rev. 0.3 4/13 Copyright © 2013 by Silicon Laboratories Si824x
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
Si824x
CLASS D AUDIO DRIVER WITH PRECISION DEAD-TIME GENERATOR
Features
Applications
Description
The Si824x isolated driver family combines two isolated drivers in a single
package. The Si8241/44 are high-side/low-side drivers specifically targeted at
high-power (>30 W) audio applications. Versions with peak output currents of
0.5 A (Si8241) and 4.0 A (Si8244) are available. All drivers operate with a
maximum supply voltage of 24 V.
Based on Silicon Labs' proprietary isolation technology, the Si824x audio drivers
incorporate input-to-output and output-to-output isolation, which enables level-
translation of signals without additional external circuits as well as use of bipolar
supply voltage up to ±750 V. The Si824x audio drivers feature an integrated dead-
time generator that provides highly precise control for achieving optimal THD.
These products also have overlap protection that safeguards against shoot-
through current damage. The CMOS-based design also provides robust immunity
from latch-up and high-voltage transients. The extremely low propagation delays
enable faster modulation frequencies for an enhanced audio experience. The TTL
level compatible inputs with >400 mV hysteresis are available in PWM input
configuration; other options include UVLO levels of 8 V or 10 V. These products
are available in narrow body SOIC packages.
Functional Block Diagram
0.5 A peak output (Si8241)
4.0 A peak output (Si8244)
PWM input
High-precision linear programmable
dead-time generator
0.4ns to 1µs
High latchup immunity >100 V/ns
Up to 1500 Vrms output-output
isolation, supply voltage of ±750 V
Input to output isolation for low noise
(up to 2500 V)
Up to 8 MHz operation
Wide operating range
–40 to +125 °C
Transient immunity >45 kV/µs
RoHS-compliant
SOIC-16 narrow body
Class D audio amplifiers
GNDI
VDDI
PWM
VDDA
VOA
GNDA
VOB
VDDB
GNDB
DISABLE
DT
UVLO
Isolation
Isolation
Programmable Dead
Time, Control Gating
Si8241/44
Patents Pending
Ordering Information:
See page 26.
Pin Assignments
PWM
NC
VDDI
GNDI
DISABLE
DT
NC
VDDI
VDDA
VOA
GNDA
NC
VDDB
VOB
GNDB
Si8241/44
SOIC-16 (Narrow)
1
2
3
4
5
6
7
8
9
12
11
10
13
14
15
16
NC
Si824x
2 Preliminary Rev. 0.3
Si824x
Preliminary Rev. 0.3 3
TABLE OF CONTENTS
Section Page
1. Top-Level Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.1. Test Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
3. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
3.1. Typical Performance Characteristics (0.5 Amp) . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
3.2. Typical Performance Characteristics (4.0 Amp) . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
3.3. Family Overview and Logic Operation During Startup . . . . . . . . . . . . . . . . . . . . . . .18
3.4. Power Supply Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
3.5. Power Dissipation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
3.6. Layout Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
3.7. Undervoltage Lockout Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
3.8. Programmable Dead Time and Overlap Protection . . . . . . . . . . . . . . . . . . . . . . . . .22
4. Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
4.1. Class D Digital Audio Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
5. Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
6. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
7. Package Outline: 16-Pin Narrow Body SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
8. Land Pattern: 16-Pin Narrow Body SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
9. Top Marking: 16-Pin Narrow Body SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
9.1. Si824x Top Marking (16-Pin Narrow Body SOIC) . . . . . . . . . . . . . . . . . . . . . . . . . . .29
9.2. Top Marking Explanation (16-Pin Narrow Body SOIC) . . . . . . . . . . . . . . . . . . . . . . .29
Document Change List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P32

SI8244CB-D-IS1

Mfr. #:
Buy SI8244CB-D-IS1
Manufacturer:
Silicon Labs
Description:
Gate Drivers 2.5kV 4A Class D Audio Driver, 10V UVLO PWM input
Lifecycle:
New from this manufacturer.
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