Cirrus Logic CS35L32 User Manual
Cs35l32, Mono class d speaker amplifier, Audio input and gain
Copyright
Cirrus Logic, Inc. 2014
(All Rights Reserved)
JUL ‘14
DS963F4
Boosted Class D Amplifier with Speaker-Protection Monitoring
and Flash LED Drivers
Mono Class D Speaker Amplifier
• Two-level Class G operation:
• Boosted: 5 V nominal
• Bypassed: battery voltage is supplied directly
• 2.5-mA quiescent current, monitors powered down
• 1.7 W into 8
(@ 10% THD+N)
• 102-dB signal-to-noise ratio (SNR, A-weighted)
• Idle channel noise 25
Vrms (A-weighted)
• 90% efficiency
Audio Input and Gain
• One differential analog input
• Speaker gain:
• 9, 12, 15, and 18 dB and mute
• Pop suppression, zero-crossing detect transitions
Flash LED Drivers
• Integrated dual LED drivers using the following:
• Boost supply output voltage
• Dual matched current regulators, 750 mA max each
• Programmable setting for Flash Mode current:
50–750 mA, in 50-mA steps
• Programmable setting for Flash-Inhibit Mode current:
50–350 mA, in 50-mA steps
• Programmable setting for Movie Mode current:
150, 120, 100, 80, 60, 40, 20 mA
• Programmable flash timer setting:
50–500 ms, in 25-ms steps
• Dedicated pin for flash trigger (FLEN)
• Dedicated pin for flash inhibit (FLINH)
• Thermally managed through boost-voltage regulation
(Features continue on page 2)
Class D Power Stage
SPKR SUPPLY
VP
GNDPLED
Current Mode Synchronous
Boost Controller
VCOM
Range
Scaling
Class D Front End
Short Circuit Protection
∆Σ Class D Modulator
V
REF
Generation
Bandgap
Voltage
Generation
FILT+
VREF
ISENSE+
ISENSE–/
VSENSE+
GNDA
SCLK
LRCK
Soft Ramp
Level Shifters
I²C Control Port
SDA
SCL
SCLK
LRCK
SDOUT
MCLK
IN–
–
+
9,12,15, or
18 dB + Mute
IN+
Flash LED Current Driver
Control,
Sensing,
and Fault
Protection
FLOUT1 FLOUT2/AD0
FLEN FLINH
SPKOUT+
SPKOUT–/
VSENSE–
I
2
C Class G Override
Watchdog
Error
GNDP
VSENSE–
VSENSE+
ISENSE–
ISENSE+
SPKR
SUPPLY
ADC
Serial Audio/Data Port
Serial Port
Clock Generation
VA
RESET
INT
VMON ADC
Front End
LP
IMON ADC
Front End
LP
Low Battery Management
Class G
VBST
Current
Sense
IREF+
SW
Power
Budgeting
Temperature
Sensor
Overtemp
Protection
ADC
ADC
CS35L32
Document Outline
- 1 Pin Descriptions
- 2 Typical Connection Diagram
- 3 Characteristics and Specifications
- Table 3-1. Recommended Operating Conditions
- Table 3-2. Absolute Maximum Ratings
- Table 3-3. DC Characteristics
- Table 3-4. Boost Converter Characteristics
- Table 3-5. LED Drive Characteristics
- Table 3-6. Speaker Amplifier Output Characteristics
- Table 3-7. Signal Monitoring Characteristics
- Table 3-8. Digital Interface Specifications and Characteristics
- Table 3-9. PSRR Characteristics
- Table 3-10. Power Consumption
- Table 3-11. Switching Specifications: Power, Reset, Master Clocks
- Table 3-12. Switching Specifications: ADSP in I2S Mode
- Table 3-13. Switching Specifications: I²C Control Port
- 4 Functional Description
- 4.1 Power Supplies
- 4.2 Interrupts
- 4.3 Speaker Amplifier
- 4.4 Low-Battery Management
- 4.5 Undervoltage Lockout (UVLO)
- 4.6 Boost Converter
- 4.7 Die Temperature Monitoring
- 4.8 Signal Monitoring
- 4.9 LED Driver
- 4.10 Power Budgeting
- 4.11 Audio/Data Serial Port (ADSP)
- 4.12 Signaling Format
- 4.13 Device Clocking
- 4.14 Control Port Operation
- 5 Applications
- 6 Register Quick Reference
- 7 Register Descriptions
- 7.1 Device ID A and B
- 7.2 Device ID C and D
- 7.3 Device ID E
- 7.4 Revision ID
- 7.5 Power Control 1
- 7.6 Power Control 2
- 7.7 Clocking Control
- 7.8 Low Battery Thresholds
- 7.9 Battery Voltage Monitor
- 7.10 Boost Converter Peak Current Protection Control
- 7.11 Scaling
- 7.12 LED and Audio Power-Budget Management
- 7.13 ADSP Control
- 7.14 Class D Amplifier Control
- 7.15 Protection Release Control
- 7.16 Interrupt Mask 1
- 7.17 Interrupt Mask 2
- 7.18 Interrupt Mask 3
- 7.19 Interrupt Status 1 (Audio)
- 7.20 Interrupt Status 2 (Monitors)
- 7.21 Interrupt Status 3 (LEDs and Boost Converter)
- 7.22 LED Lighting Status
- 7.23 LED Flash Mode Current
- 7.24 LED Movie Mode Current
- 7.25 LED Flash Timer
- 7.26 LED Flash Inhibit Current
- 8 Typical Performance Plots
- 9 Parameter Definitions
- 10 Package Dimensions
- 11 Thermal Characteristics
- 12 Ordering Information
- 13 References
- 14 Revision History