LM48560_15 Datasheet, PDF (1/27 Pages) Texas Instruments – Audio Power Amplifier Series High Voltage Class H Ceramic Speaker Driver

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LM48560
SNAS513F – AUGUST 2011 – REVISED NOVEMBER 2015
LM48560 Boomer™ Audio Power Amplifier Series High Voltage Class H Ceramic Speaker
Driver With Automatic Level Control
1 Features
•1 Class H Topology
• Integrated Boost Converter
• Bridge-Tied Load (BTL) Output
• Selectable Differential Inputs
• Selectable Control Interfaces
– (Hardware or Software mode)
• I²C Programmable ALC
• Low Supply Current
• Minimum External Components
• Micro-Power Shutdown
• Available in Space-Saving DSBGA Package
• Key Specifications:
– Output Voltage at V_DD = 3.6 V,
R_L = 1.5 μF + 10 Ω, THD+N ≤ 1%
– 30 V_P-P (Typical)
– Quiescent Power Supply Current
at 3.6 V (ALC Enabled)
– 4 mA (Typical)
– Power Dissipation at 25 V_P-P, 1 W (Typical)
– Shutdown Current, 0.1 μA (Typical)
2 Applications
• Touch Screen Smart Phones
• Tablet PCs
• Portable Electronic Devices
• MP3 Players
3 Description
The LM48560 device is a high voltage, high
efficiency, Class H driver for ceramic speakers and
piezo actuators. The LM48560 device’s Class H
architecture offers significant power savings
compared to traditional Class AB amplifiers. The
device provides 30 V_P-P output drive while consuming
just 4 mA of quiescent current from a 3.6 V supply.
The LM48560 device features TI’s unique automatic
level control (ALC) that provides output limiter
functionality. The LM48560 device features two fully
differential inputs with separate gain settings, and a
selectable control interface. In software control mode,
the gain control and device modes are configured
through the I²C interface. In hardware control mode,
the gain and input mux are configured through a pair
of logic inputs.
The LM48560 device has a low power shutdown
mode that reduces quiescent current consumption to
0.1 μA. The LM48560 device is available in an ultra-
small 16–bump DSBGA package (1.97 mm × 1.97
mm).
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM48560
DSBGA (16)
1.97 mm × 1.97 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Circuit
+2.7V to +5.5V
L1
D1
4.7 PH
C_S
SCL/GAIN
SDA/SEL
SW/HW
SHDN
C_IN
0.47 PF
C_IN
0.47 PF
CIN
0.47 PF
CIN
0.47 PF
IN1+
IN1-
IN2+
IN2-
I2C
INTERFACE
MUX/
GAIN
STAGE
V_DD
SW
BOOST
CONVERTER
ALC
SGND
V_BST
PGND
OUT-
OUT+
SET
C_BST
1 PF
R_L
10:
CL
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.