MAX9742ETX+ Maxim Integrated Products, MAX9742ETX+ Datasheet - Page 26

• Manufacturer Part Number: MAX9742ETX+
• Description: IC AMP AUDIO PWR 20.5W D 36TQFN
• Manufacturer: Maxim Integrated Products
• Type: Class Dr

Specifications of MAX9742ETX+

• Output Type: 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 20.5W x 2 @ 8 Ohm
• Voltage - Supply: 20 V ~ 40 V, ±10 V ~ 20 V
• Features: Depop, Differential Inputs, Mute, Short-Circuit and Thermal Protection, Shutdown
• Mounting Type: Surface Mount
• Package / Case: 36-TQFN Exposed Pad
• Product: Class-D
• Output Power: 16 W
• Thd Plus Noise: 0.08 %
• Supply Current: 15 mA
• Maximum Power Dissipation: 2.86 W
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Audio Load Resistance: 4 Ohms
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Single-/Dual-Supply, Stereo 16W,
Class D Amplifier with Differential Inputs
Figure 13a. Continuous Output Current Flow for Positive Supply Pumping
Figure 13b. Continuous Output Current Flow for Negative Supply Pumping
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OFF
OFF
ON
ON
CASE 2: I
I
I
AVG
PUMP
CASE 1: I
I
I
AVG
PUMP
= AVERAGE (CONTINUOUS) OUTPUT CURRENT DURING ONE SWITCHING CYCLE.
= AVERAGE (CONTINUOUS) OUTPUT CURRENT DURING ONE SWITCHING CYCLE.
= AMOUNT OF CURRENT PUMPED INTO SUPPLY BYPASS CAPACITOR.
= AMOUNT OF CURRENT PUMPED INTO SUPPLY BYPASS CAPACITOR.
AVG
AVG
FLOWING OUT OF HALF-BRIDGE CAUSING VOLTAGE ACROSS C
FLOWING INTO HALF-BRIDGE CAUSING VOLTAGE ACROSS C
C
C
C
C
I
VSS
VSS
AVG
VDD
VDD
I
AVG
L
L
F
F
V
V
V
V
DD
C
DD
C
SS
SS
F
F
I
PUMP
VDD
VSS
TO INCREASE (DUTY CYCLE < 50%).
I
= DUTY CYCLE x I
PUMP
TO INCREASE (DUTY CYCLE > 50%).
OFF
OFF
ON
ON
= DUTY CYCLE x I
AVG
AVG
C
C
C
I
C
AVG
VDD
VSS
VDD
VSS
I
AVG
L
L
F
F
V
V
V
V
DD
C
DD
C
SS
SS
F
F