MAX9770ETI+ Maxim Integrated Products, MAX9770ETI+ Datasheet - Page 10

• Manufacturer Part Number: MAX9770ETI+
• Description: IC AMP AUDIO 1.2W MONO D 28TQFN
• Manufacturer: Maxim Integrated Products
• Type: Class Dr

Specifications of MAX9770ETI+

• Output Type: 1-Channel (Mono) with Stereo Headphones
• Max Output Power X Channels @ Load: 1.2W x 1 @ 8 Ohm; 80mW x 2 @ 16 Ohm
• Voltage - Supply: 2.5 V ~ 5.5 V
• Features: Depop, Input Multiplexer, Mute, Short-Circuit and Thermal Protection, Shutdown
• Mounting Type: Surface Mount
• Package / Case: 28-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1.2W, Low-EMI, Filterless, Mono Class D Amplifier
with Stereo DirectDrive Headphone Amplifiers
10
TQFN-EP
______________________________________________________________________________________
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
—
1
2
3
4
5
6
7
8
9
PIN
TSSOP
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
—
4
5
6
7
8
9
1
2
3
HPOUTR
HPOUTL
CPGND
CPV
MONO
NAME
CPV
GAIN2
GAIN1
PGND
SHDN
SYNC
OUT+
SELM
OUT-
PV
SV
SEL1
SEL2
BIAS
IN2L
IN1L
GND
IN2R
IN1R
C1N
V
HPS
C1P
EP
DD
DD
SS
DD
SS
Common-Mode Bias Voltage. Bypass with a 0.047µF capacitor to GND.
Power Supply
Right-Channel Headphone Output
Left-Channel Headphone Output
Headphone Amplifier Negative Power Supply
Headphone Sense Input
Positive Charge-Pump Power Supply
Charge-Pump Output. Connect to SV
Charge-Pump Flying Capacitor Negative Terminal
Charge-Pump Flying Capacitor Positive Terminal
Charge-Pump Ground
Select Stereo Channel 1 Inputs. Digital input. Drive SEL1 high to select inputs IN1L and
IN1R.
Select Stereo Channel 2 Inputs. Digital input. Drive SEL2 high to select inputs IN2L and
IN2R.
Select Mono Channel Input. Digital input. Drive SELM high to select the MONO input.
Shutdown. Drive SHDN low to disable the device. Connect SHDN to V
operation.
Frequency Select and External Clock Input:
SYNC = GND: fixed-frequency PWM mode with f
SYNC = Unconnected: fixed-frequency PWM mode with f
SYNC = V
SYNC = Clocked: fixed-frequency PWM mode with f
Speaker Amplifier Power Ground
Speaker Amplifier Positive Output
Speaker Amplifier Negative Output
Speaker Amplifier Power Supply
Gain Control Input 2
Gain Control Input 1
Mono Channel Input
Stereo Channel 2, Left Input
Stereo Channel 1, Left Input
Ground
Stereo Channel 2, Right Input
Stereo Channel 1, Right Input
Exposed Paddle. Can be left unconnected or connected to GND. Connect to ground
plane for improved thermal performance.
DD
: spread-spectrum PWM mode with f
SS
FUNCTION
.
S
S
= 1100kHz.
= 1220kHz ±120kHz.
S
= external clock frequency.
S
= 1450kHz.
Pin Description
DD
for normal