lm4990mm National Semiconductor Corporation, lm4990mm Datasheet - Page 3

• Manufacturer Part Number: lm4990mm
• Description: 2 Watt Audio Power Amplifier With Selectable Shutdown Logic Level
• Manufacturer: National Semiconductor Corporation

. A SD_MODE select pin determines the Shutdown Mode for the LD and MH packages, whether it is an Asserted High or an Asserted Low device, to activate
shutdown.
. The SD_MODE select pin is not available with the MM and ITL packaged devices. Shutdown occurs only with a low assertion.
Typical Application
Note: MM and ITL packaged devices are active low only; Shutdown Mode pin is internally tied to GND.
Package
Shutdown Mode
Typical Power Output at 5V,
1% THD+N
FIGURE 1. Typical Audio Amplifier Application Circuit (LD and MH)
Selectable
(R
L
2W
LD
= 4Ω)
3
Selectable
(R
L
MH
2W
= 4Ω)
(R
1.25W
L
Low
MM
= 8Ω)
(R
20051001
1.25W
L
Low
ITL
= 8Ω)
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