CS35L01/03
2.9 W Mono Class-D Audio Amplifier with Low Idle Current
CS35L01 & CS35L03 Features
Filterless Hybrid Class-D Architecture
General Description
The CS35L01 and the CS35L03 are 2.9W 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 -75 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
for package options and gain
configurations.
– <1 mA Quiescent Current
– 1 x 2.9 W into 4
Ω
(10% THD+N)
– 1 x 2.3 W into 4
Ω
(1% THD+N)
– 1 x 1.7 W into 8
Ω
(10% THD+N)
– 1 x 1.4 W into 8
Ω
(1% THD+N)
Advanced
ΔΣ
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
Portable Navigation Devices
Active Speakers
Portable Gaming
MODE
LDO Filter
Low Drop-Out
Voltage Regulator
VBATT
2.5V - 5V
Class-H
Controller
Shutdown
Gate Drivers
Audio In +
Gain
Advanced
ΔΣ
Modulator
Gate Drivers
Audio In -
Gain
Speaker Out +
Speaker Out -
Internal
Oscillator
Short Circuit/Thermal
Protection
GND
Advance Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Copyright
Cirrus Logic, Inc. 2010
(All Rights Reserved)
APR '10
DS909A2
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