LM4781TA/NOPB National Semiconductor, LM4781TA/NOPB Datasheet - Page 9

• Manufacturer Part Number: LM4781TA/NOPB
• Description: IC AMP AUDIO PWR 35W AB TO220-27
• Manufacturer: National Semiconductor
• Series: Overture™r
• Type: Class ABr

Specifications of LM4781TA/NOPB

• Output Type: 3-Channel
• Max Output Power X Channels @ Load: 35W x 3 @ 8 Ohm
• Voltage - Supply: 20 V ~ 70 V, ±10 V ~ 35 V
• Features: Depop, Mute, Short-Circuit and Thermal Protection
• Mounting Type: Through Hole
• Package / Case: TO-220-27 (Bent and Staggered Leads)
• For Use With: LM4781TABD - BOARD EVALUATION LM4781TA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM4781TA; *LM4781TA/NOPB; LM4781TA

Optional External Component
Interaction
Although the optional external components have specific
desired functions that are designed to reduce the bandwidth
and eliminate unwanted high frequency oscillations they may
cause certain undesirable effects when they interact. Inter-
action may occur for components whose reactances are in
close proximity to one another. One example would be the
Typical Performance Characteristics
±
±
20V, P
28V, P
THD+N vs Frequency
THD+N vs Frequency
R
R
OUT
OUT
L
L
= 4Ω, 80kHz BW
= 8Ω, 80kHz BW
= 1W & 20W/Channel
= 1W & 20W/Channel
20067325
20067326
9
coupling capacitor, C
These two components act as low impedances to certain
frequencies which will couple signals from the input to the
output. Please take careful note of basic amplifier compo-
nent functionality when designing in these components.
The optional external components shown in Figure 4 and
Figure 5 and described above are applicable in both single
and split voltage supply configurations.
THD+N vs Output Power/Channel
±
24V, P
±
20V, R
THD+N vs Frequency
R
OUT
L
C
= 6Ω, 80kHz BW
, and the compensation capacitor, C
L
= 1W & 20W/Channel
= 4Ω, 80kHz BW
20067344
20067343
www.national.com
f
.