MAX9830AETA+T Maxim Integrated Products, MAX9830AETA+T Datasheet - Page 7

• Manufacturer Part Number: MAX9830AETA+T
• Description: IC AMP MONO 2W CLASS D 8TDFN
• Manufacturer: Maxim Integrated Products
• Type: Class Dr

Specifications of MAX9830AETA+T

• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 2.25mW x 1 @ 4 Ohm
• Voltage - Supply: 2.6 V ~ 5.5 V
• Features: Depop, Differential Inputs, Short-Circuit and Thermal Protection, Shutdown
• Mounting Type: Surface Mount
• Package / Case: 8-TDFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MAX9830 features industry-leading quiescent cur-
rent, low-power shutdown mode, comprehensive click-
and-pop suppression, and excellent RF immunity.
The MAX9830 offers Class AB audio performance with
Class D efficiency in a minimal board-space solution.
The Class D amplifier features spread-spectrum modu-
lation combined with edge rate and overshoot control
circuitry that offers significant improvements to switch-
mode amplifier radiated emissions.
The MAX9830 includes thermal overload and short-cir-
cuit protection.
The MAX9830 filterless Class D amplifier offers much
higher efficiency than Class AB amplifiers. The high
efficiency of a Class D amplifier is due to the switching
operation of the output stage transistors. Any power
loss associated with the Class D output stage is mostly
due to the I
quiescent current overhead.
Traditional Class D amplifiers require the use of exter-
nal LC filters, or shielding, to meet EN55022B electro-
magnetic-interference (EMI) regulation standards.
Maxim’s active emissions limiting edge-rate control cir-
cuitry and spread-spectrum modulation reduces EMI
emissions, while maintaining up to 85% efficiency.
Maxim’s spread-spectrum modulation mode flattens
wideband spectral components, while proprietary tech-
niques ensure that the cycle-to-cycle variation of the
switching period does not degrade audio reproduction
or efficiency. The MAX9830’s spread-spectrum
modulator
frequency by ±10kHz around the center frequency
_______________________________________________________________________________________________________
PIN
—
1
2
3
4
5
6
7
8
2
R loss of the MOSFET on-resistance and
randomly
Ultra-Low EMI Filterless Output Stage
NAME
SHDN
PGND
OUT+
PVDD
OUT-
N.C.
IN+
IN-
EP
Class D Speaker Amplifier
Detailed Description
Noninverting Audio Input
Inverting Audio Input
Active-Low Shutdown Input. Drive SHDN low to place the device in shutdown mode.
No Connection. Leave unconnected.
Ground
Negative Speaker Output
Positive Speaker Output
Power Supply. Bypass PVDD to PGND with a 0.1µF capacitor.
Exposed Pad. Connect exposed pad to a solid ground plane.
varies
the
switching
Mono 2W Class D Amplifier
(600kHz). Above 10MHz, the wideband spectrum looks
like noise for EMI purposes (Figure 1).
If the output current of the speaker amplifier exceeds
the current limit (1.8A typ), the MAX9830 disables the
outputs for approximately 400µs. At the end of 400µs,
the outputs are re-enabled. If the fault condition still
exists, the MAX9830 continues to disable and re-enable
the outputs until the fault condition is removed.
The MAX9830 features a low-power shutdown mode,
drawing 0.5µA of supply current. Drive SHDN low to put
the MAX9830 into shutdown.
The MAX9830 speaker amplifier features Maxim’s com-
prehensive click-and-pop suppression. During startup,
the click-and-pop suppression circuitry reduces any
audible transient sources internal to the device. When
entering shutdown, the differential speaker outputs
ramp down to PGND quickly and simultaneously.
Figure 1. EMI with 24in of Speaker Cable
-10
40
30
20
10
0
30
FUNCTION
60
80
100
EN55022B LIMIT
120
Click-and-Pop Suppression
FREQUENCY (MHz)
140
160
Pin Description
180
Speaker Current Limit
200
220
240
Shutdown
260
280
300
7