Datasheet

PIN NAME FUNCTION
8 C1N Charge-Pump Flying Capacitor C1, Negative Terminal
9 C1P Charge-Pump Flying Capacitor C1, Positive Terminal
10 CPV
DD
Charge-Pump Power Supply. Bypass to PV
DD
with a 1µF capacitor as close to pin as possible.
11 SYNCOUT Open-Drain Slew-Rate-Limited Clock Output. Pullup with a 10kΩ to resistor to REG.
13 SYNCIN
Clock Synchronization Input. Allows for synchronization of the internal oscillator with an external
clock.
14 FS2 Frequency Select 2
15 FS1 Frequency Select 1
16 INL- Left-Channel Negative Input (Stereo Mode Only)
17 INL+ Left-Channel Positive Input (Stereo Mode Only)
18 MONO Mono/Stereo Mode Input. Drive logic high for mono mode. Drive logic low for stereo mode.
19, 20, 21 REG Internal Regulator Output Voltage (6V). Bypass with a 0.01µF capacitor to GND.
22, 23 GND Analog Ground
24 SS Soft-Start. Connect a 0.47µF capacitor to GND to utilize soft-start power-up sequence.
25 V
DD
Analog Power Supply. Bypass to GND with a 0.1µF capacitor as close to pin as possible.
26 INR- Right-Channel Negative Input. In mono mode, INR- is the negative input.
27 INR+ Right-Channel Positive Input. In mono mode, INR+ is the positive input.
28 G1 Gain Select input 1
29 G2 Gain Select input 2
30 SHDN
Active-Low Shutdown Input. Drive SHDN high for normal operation. Drive SHDN low to place the
device in shutdown mode.
31 MUTE
Active-Low Mute Input. Drive logic low to place the device in mute. In mute mode, Class D output
stage is no longer switching. Drive high for normal operation. MUTE is internally pulled up to
V
REG
with a100kΩ resistor.
32 TEMP Thermal Flag Output, Open Drain. Pullup with a 10kΩ resistor to REG.
33 TH2 Temperature Flag Threshold Select Input 2
34 TH1 Temperature Flag Threshold Select Input 1
35 TH0 Temperature Flag Threshold Select Input 0
45, 46 OUTR- Right-Channel Negative Output
47, 48 OUTR+ Right-Channel Positive Output
51, 52 OUTL- Left-Channel Negative Output
53, 54 OUTL+ Left-Channel Positive Output
EP GND Exposed Paddle. Connect to GND with multiple vias for best heat dissipation.
MAX9709 25W/50W, Filterless, Spread-Spectrum,
Stereo/Mono, Class D Amplier
www.maximintegrated.com
Maxim Integrated
9
Pin Description (continued)