MAX9789A Datasheet, PDF (21/26 Pages) Maxim Integrated Products – Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers

Windows Vista-Compliant, Stereo Class AB Speaker
Amplifiers and DirectDrive Headphone Amplifiers
Block Diagrams (continued)
4.5V TO 5.5V
1.0μF
SPKR_INL 3
1.0μF
SPKR_INR 2
1.0μF
HP_INL 27
1.0μF
HP_INR 26
3V TO 5.5V
HP_EN 22
MUTE 25
SPKR_EN 23
GAIN2 32
GAIN1 31
0.1μF
VDD
30
PVDD
8, 18
0.1μF
MAX9790A
STEREO
BTL
AMPLIFIER
TO HPV_DD
6 OUTL+
7 OUTL-
20 OUTR+
19 OUTR-
24 BIAS
1.0μF
TO PV_SS
16 HPL
CONTROL
CHARGE
PUMP
15 HPR
17 HPVDD
9 CPVDD
10 C1P
11 CPGND
12 C1N
3V TO 5.5V
C3
10μF
C1
1μF
4, 28
GND
5, 21
PGND
14
13
PVSS
CPVSS
LOGIC PINS CONFIGURED FOR:
SPKR_EN = 0, SPEAKER AMPLIFIERS ENABLED
HP_EN = 1, HEADPHONE AMPLIFIER ENABLED
MUTE = 1, MUTE DISABLED
GAIN1 = 0 GAIN = 0, 6dB SPEAKER GAIN
C2
1.0μF
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