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SI8244 Dataheets PDF



Part Number SI8244
Manufacturers Silicon Laboratories
Logo Silicon Laboratories
Description CLASS D AUDIO DRIVER
Datasheet SI8244 DatasheetSI8244 Datasheet (PDF)

Si824x CLASS D AUDIO DRIVER Features   WI TH P R E C I S I O N D E AD - T I M E G E N E R A T O R 0.5 A peak output (Si8241)  4.0 A peak output (Si8244)   PWM input   High-precision linear programmable dead-time generator  0.4 ns to 1 µs   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/µ.

  SI8244   SI8244



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Si824x CLASS D AUDIO DRIVER Features   WI TH P R E C I S I O N D E AD - T I M E G E N E R A T O R 0.5 A peak output (Si8241)  4.0 A peak output (Si8244)   PWM input   High-precision linear programmable dead-time generator  0.4 ns to 1 µs   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 Applications  Class D audio amplifiers Ordering Information: See page 25. Description Pin Assignments 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 leveltranslation 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 deadtime generator that provides highly precise control for achieving optimal THD. These products also have overlap protection that safeguards against shootthrough 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. SOIC-16 (Narrow) PWM NC VDDI GNDI DISABLE DT NC VDDI 1 2 3 4 5 6 7 8 16 15 14 13 VDDA VOA GNDA NC NC VDDB VOB GNDB Si8241/44 12 11 10 9 Functional Block Diagram PWM Patents Pending VDDA Isolation DT VOA GNDA VDDI UVLO Programmable Dead Time, Control Gating VDDB DISABLE Isolation VOB GNDB GNDI Si8241/44 Rev. 0.2 2/11 Copyright © 2011 by Silicon Laboratories Si824x This information applies to a product under development. Its characteristics and specifications are subject to change without notice. Free Datasheet http://www.datasheet4u.com/ Si824x 2 Rev. 0.2 Free Datasheet http://www.datasheet4u.com/ Si824x TABLE O F C ONTENTS Section Page 1. Top-Level Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 2. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 2.1. Test Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 3. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.1. Typical Performance Characteristics (0.5 Amp) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3.2. Typical Performance Characteristics (4.0 Amp) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3.3. Family Overview and Logic Operation During Startup . . . . . . . . . . . . . . . . . . . . . . . 17 3.4. Power Supply Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.5. Power Dissipation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 3.6. Layout Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 3.7. Undervoltage Lockout Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 3.8. Programmable Dead Time and Overlap Protection . . . . . . . . . . . . . . . . . . . . . . . . . 22 4. Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.1. Class D Digital Audio Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 5. Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 6. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 7. Package Outline: 16-Pin Narrow Body SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 8. Land Pattern: 16-Pin Narrow Body SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 9. Top Marking: 16-Pin Narrow Body SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Document Change List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


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