MAX9790AETJ+ Maxim Integrated Products, MAX9790AETJ+ Datasheet - Page 11
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MAX9790AETJ+
Manufacturer Part Number
MAX9790AETJ+
Description
IC AMP AUDIO 2W STER AB 32TQFN
Manufacturer
Maxim Integrated Products
Series
DirectDrive™r
Type
Class ABr
Specifications of MAX9790AETJ+
Output Type
2-Channel (Stereo) with Stereo Headphones
Max Output Power X Channels @ Load
2W x 2 @ 4 Ohm; 100mW x 2 @ 16 Ohm
Voltage - Supply
4.5 V ~ 5.5 V
Features
Depop, Mute, Short-Circuit and Thermal Protection, Shutdown
Mounting Type
Surface Mount
Package / Case
32-TQFN Exposed Pad
For Use With
MAX9789AEVKIT+ - EVALUATION KIT FOR MAX9789A
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Windows Vista-Compliant, Stereo Class AB Speaker
(V
∞, unless otherwise specified, GAIN1 = 0, GAIN2 = 1 (A
unless otherwise noted. Headphone mode: SPKR_EN = 1, HP_EN = 0. Speaker mode: SPKR_EN = 0, HP_EN = 1.)
DD
= PV
Amplifiers and DirectDrive Headphone Amplifiers
DD
= CPV
-0.05
-0.10
0.10
0.05
0.3
0.2
0.1
0
0
SHUTDOWN CURRENT vs. SUPPLY VOLTAGE
DD
4.50
______________________________________________________________________________________
0
SPKR_EN = 5V
HP_EN = 0
LDO_EN = 0 (MAX9789)
HEADPHONE SHUTDOWN WAVEFORM
V
I
LDO_OUT
= HPV
LDO OUTPUT VOLTAGE ACCURACY
LDO_OUT
vs. AMPLIFIER OUTPUT POWER
0.5
AMPLIFIER OUTPUT POWER (W)
4.75
= 0A
= 4.75V
DD
SUPPLY VOLTAGE (V)
1.0
= LDO_EN = +5V, V
20ms/div
5.00
1.5
2.0
5.25
MAX9789 toc39
2.5
Typical Operating Characteristics (continued)
5.50
GND
3.0
VSP
HP_EN
5V/div
HP_
500mV/div
= V
= 10dB, A
PGND
= V
VHP
CPGND
= 3.5dB), measurement BW = 20kHz AES17, T
-0.5
-1.0
-1.5
-2.0
-0.5
-1.0
-1.5
-2.0
= V
2.0
1.5
1.0
0.5
2.0
1.5
1.0
0.5
20
15
10
-5
0
0
5
0
4.50
-40
LDO_SET
0
SUPPLY CURRENT vs. SUPPLY VOLTAGE
V
SPKR_EN = 1
I
LDO_OUT
LDO OUTPUT VOLTAGE ACCURACY
HP_EN = 1
LDO_OUT
LDO OUTPUT VOLTAGE ACCURACY
SPKR_EN = 0
HP_EN = 1
25
-15
4.75
= 1mA
= 4.75V
= 0V, C1 = C2 = C
vs. TEMPERATURE
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
50
10
vs. I
I
LOAD
5.00
75
LOAD
(mA)
SPKR_EN = 0
HP_EN = 0
35
SPKR_EN = 1
HP_EN = 0
100
5.25
60
125
BIAS
= C
5.50
150
85
IN
= 1µF. R
A
= +25°C,
L
=
11