Rainbow Electronics MAX9755 - Manual (Page 11)

MAX9750/MAX9751/MAX9755
2.6W Stereo Audio Power Amplifiers and
DirectDrive Headphone Amplifiers
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Pin Description
PIN
MAX9750 MAX9751 MAX9755
THIN
QFN
TSSOP
THIN
QFN
TSSOP
THIN
QFN
TSSOP
NAME FUNCTION
1 5 — — 2 6 INL Left-Channel Audio Input
2 6 — — — — BEEP Audible Alert Beep Input
3, 19 7, 23 3, 19 7, 23 3, 19 7, 23 PGND Power Ground
4 8 4 8 4 8 OUTL+ Left-Channel Positive Speaker Output
5 9 5 9 5 9 OUTL- Left-Channel Negative Speaker Output
6, 16 10, 20 6, 16 10, 20 6, 16 10, 20 PV DD Speaker Amplifier Power Supply
7 11 7 11 7 11 CPV DD Charge-Pump Power Supply
8 12 8 12 8 12 C1P Charge-Pump Flying-Capacitor Positive Terminal
9 13 9 13 9 13 CPGND Charge-Pump Ground
10 14 10 14 10 14 C1N Charge-Pump Flying-Capacitor Negative Terminal
11 15 11 15 11 15 CPV SS Charge-Pump Output. Connect to V SS .
12 16 12 16 12 16 V SS Headphone Amplifier Negative Power Supply
13 17 13 17 13 17 HPOUTR Right-Channel Headphone Output
14 18 14 18 14 18 HPOUTL Left-Channel Headphone Output
15 19 15 19 15 19 HPV DD Headphone Positive Power Supply
17 21 17 21 17 21 OUTR- Right-Channel Negative Speaker Output
18 22 18 22 18 22 OUTR+ Right-Channel Positive Speaker Output
20 24 20 24 20 24 HPS Headphone Sense Input
21 25 21 25 21 25 BIAS
Common-Mode Bias Voltage. Bypass with a 1
µ
F
capacitor to GND.
22 26 22 26 22 26 SHDN
Shutdown. Drive SHDN low to disable the device.
Connect SHDN to V
DD for normal operation.
23 27 — — — — GAIN2 Gain Control Input 2
24 28 — — — — GAIN1 Gain Control Input 1
25 1 25 1 25 1 V DD Power Supply
26 2 26 2 23, 26 2, 27 GND Ground
27 3 — — 28 4 INR Right-Channel Audio Input
28 4 — — — — VOL Analog Volume Control Input
— — 1 5 — — INL1 Left-Channel Audio Input 1
— — 2 6 — — INL2 Left-Channel Audio Input 2
— — 23 27 — — IN1/2 Input Select
— — 24 28 24 28 GAIN Gain Select
— — 27 3 — — INR1 Right-Channel Audio Input 1
— — 28 4 — — INR2 Right-Channel Audio Input 2
— — — — 1, 27 3, 5 N.C. No Connection. Not internally connected.