max9742 Maxim Integrated Products, Inc., max9742 Datasheet - Page 26

• Manufacturer Part Number: max9742
• Description: Max9742 Single-/dual-supply, Stereo 16w, Class D Amplifier With Differential Inputs
• Manufacturer: Maxim Integrated Products, Inc.

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
26
______________________________________________________________________________________
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