2

DS749A1

CS4412

TABLE OF CONTENTS

1. PIN DESCRIPTION ................................................................................................................................. 2

2. CHARACTERISTICS AND SPECIFICATIONS ...................................................................................... 4

RECOMMENDED OPERATING CONDITIONS .................................................................................... 4

ABSOLUTE MAXIMUM RATINGS ........................................................................................................ 4

PWM POWER OUTPUT CHARACTERISTICS ..................................................................................... 5

DC ELECTRICAL CHARACTERISTICS ................................................................................................ 6

DIGITAL INTERFACE SPECIFICATIONS ............................................................................................. 6

DIGITAL I/O PIN CHARACTERISTICS ................................................................................................. 7

3. TYPICAL CONNECTION DIAGRAMS

................................................................................................. 8

4. APPLICATIONS ................................................................................................................................... 12

4.1 Overview ........................................................................................................................................ 12

4.2 Reset and Power-Up ...................................................................................................................... 12

4.2.1 PWM Popguard Transient Control ........................................................................................ 12

4.2.2 Recommended Power-Up Sequence .................................................................................... 12

4.2.3 Recommended Power-Down Sequence .............................................................................. 13

4.3 Output Mode Configuration ............................................................................................................ 13

4.4 Output Filters ................................................................................................................................. 14

4.4.1 Half-Bridge Output Filter ........................................................................................................ 14

4.4.2 Full-Bridge Output Filter (Stereo or Parallel) ......................................................................... 15

4.5 Device Protection and Error Reporting .......................................................................................... 16

4.5.1 Over-current Protection ......................................................................................................... 16

4.5.2 Thermal Warning, Thermal Error, and Under-Voltage Error ................................................. 16

5. POWER SUPPLY, GROUNDING, AND PCB LAYOUT ....................................................................... 17

5.1 Power Supply and Grounding ........................................................................................................ 17

5.1.1 Integrated VD Regulator ........................................................................................................ 17

5.2 QFN Thermal Pad .......................................................................................................................... 17

6. PARAMETER DEFINITIONS ................................................................................................................ 18

7. PACKAGE DIMENSIONS .................................................................................................................... 19

8. THERMAL CHARACTERISTICS ......................................................................................................... 20

8.1 Thermal Flag .................................................................................................................................. 20

9. ORDERING INFORMATION ................................................................................................................ 21

10. REVISION HISTORY .......................................................................................................................... 21

LIST OF FIGURES

Figure 1.Stereo Full-Bridge Typical Connection Diagram ........................................................................... 8

Figure 2.2.1 Channel Typical Configuration Diagram ................................................................................. 9

Figure 3.4-Channel Half-Bridge Typical Connection Diagram .................................................................. 10

Figure 4.Mono Parallel Full-Bridge Typical Connection Diagram ............................................................. 11

Figure 5.Output Filter - Half-Bridge ........................................................................................................... 14

Figure 6.Output Filter - Full-Bridge ............................................................................................................ 15

LIST OF TABLES

Table 1. I/O Power Rails ............................................................................................................................. 7

Table 2. Output Mode Configuration Options ............................................................................................ 13

Table 3. Low-Pass Filter Components - Half-Bridge ................................................................................. 14

Table 4. DC-Blocking Capacitors Values - Half-Bridge ............................................................................. 15

Table 5. Low-Pass Filter Components - Full-Bridge ................................................................................. 15

Table 6. Over-current Error Conditions ..................................................................................................... 16

Table 7. Thermal and Under-Voltage Error Conditions ............................................................................. 16

Table 8. VD Supply Level Indication ......................................................................................................... 17