Cirrus Logic CS35L03 - Manual

Copyright
 Cirrus Logic, Inc. 2011
(All Rights Reserved)
http://www.cirrus.com
Gate Drivers
Class-H
Controller
Advanced ΔΣ
Modulator
Gate Drivers
Internal
Oscillator
Gain
Gain
Audio In +
Audio In -
Shutdown
Speaker Out +
Speaker Out -
GND
VBATT
2.5V - 5V
LDO Filter
Short Circuit/Thermal
Protection
MODE
Low Drop-Out
Voltage Regulator
3.0 W Mono Class-D Audio Amplifier with Low Idle Current
CS35L01 and CS35L03 Features
 Filterless Hybrid Class-D Architecture
– <1 mA Quiescent Current
– 1 x 3.0 W into 4
 (10% THD+N)
– 1 x 2.4 W into 4  (1% THD+N)
– 1 x 1.7 W into 8  (10% THD+N)
– 1 x 1.4 W into 8  (1% THD+N)
 Advanced  Closed-loop Modulation
– 98 dB Signal-to-Noise Ratio (A-Weighted)
– 0.02% THD+N @ 1 W (SD & HD Mode)
 Integrated Protection and Automatic Recovery
for Output Short-circuit and Thermal Overload
 Pin-compatible 9-ball WLCSP family for easy
upgrade path
– CS35L01: +6 dB default Gain
– CS35L03: +12 dB default Gain
 Pop and Click Suppression
Common Applications
 Mobile Phones
 Laptops/Netbooks/Tablets
 Portable Navigation Devices
 Active Speakers
 Portable Gaming
General Description
The CS35L01 and the CS35L03 are 3.0W high efficien-
cy Hybrid Class-D audio amplifiers with low idle current
consumption.
The CS35L01/03 features an advanced closed-loop ar-
chitecture to provide 0.02% THD+N at 1 W and -87 dB
PSRR at 217 Hz.
A flexible Hybrid Class-D output stage offers four
modes of operation: Standard Class-D (SD) mode of-
fers full audio bandwidth and high audio performance;
Hybrid Class-D (HD) mode offers a substantial reduc-
tion in idle power consumption with an integrated Class-
H controller; Reduced Frequency Class-D (FSD) mode
reduces the output switching frequency, producing low-
er electromagnetic interference (EMI); and Reduced
Frequency Hybrid Class-D (FHD) mode produces both
the lower idle power consumption of HD mode and the
reduced EMI benefits of FSD mode.
Requiring minimal external components and PCB
space, the CS35L01 and CS35L03 are available in a
1.2 mm x 1.2 mm, 9-ball WLCSP package in Commer-
cial grade (-10°C to +70°C). Please see
“Ordering
Information” on page 33 for package options and gain
configurations.
CS35L01/03
JULY '11
DS909F1