LM4765T/NOPB National Semiconductor, LM4765T/NOPB Datasheet

IC AMP AUDIO PWR 30W AB TO220-15

LM4765T/NOPB

Manufacturer Part Number
LM4765T/NOPB
Description
IC AMP AUDIO PWR 30W AB TO220-15
Manufacturer
National Semiconductor
Series
Overture™r
Type
Class ABr
Datasheet

Specifications of LM4765T/NOPB

Output Type
2-Channel (Stereo)
Max Output Power X Channels @ Load
30W x 2 @ 8 Ohm
Voltage - Supply
20 V ~ 64 V, ±10 V ~ 32 V
Features
Depop, Mute, Short-Circuit and Thermal Protection, Standby
Mounting Type
Through Hole
Package / Case
TO-220-15 (Bent and Staggered Leads)
Amplifier Class
AB
No. Of Channels
1
Output Power
30W
Supply Voltage Range
20V To 64V
Load Impedance
8ohm
Operating Temperature Range
-20°C To +85°C
Amplifier Case Style
TO-220
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
*LM4765T
*LM4765T/NOPB
LM4765T
© 2004 National Semiconductor Corporation
LM4765 Overture
Audio Power Amplifier Series Dual 30W Audio Power
Amplifier with Mute and Standby Modes
General Description
The LM4765 is a stereo audio amplifier capable of delivering
typically 30W per channel of continuous average output
power into an 8Ω load with less than 0.1% THD+N.
Each amplifier has an independent smooth transition fade-
in/out mute and a power conserving standby mode which
can be controlled by external logic.
The performance of the LM4765, utilizing its Self Peak In-
stantaneous Temperature (˚Ke) (SPiKe
cuitry, places it in a class above discrete and hybrid amplifi-
ers by providing an inherently, dynamically protected Safe
Operating Area (SOA). SPiKe protection means that these
parts are safeguarded at the output against overvoltage,
undervoltage, overloads, including thermal runaway and in-
stantaneous temperature peaks.
Typical Application
Numbers in parentheses represent pinout for amplifier B.
*Optional component dependent upon specific design requirements.
SPiKe
FIGURE 1. Typical Audio Amplifier Application Circuit
Protection and Overture
are trademarks of National Semiconductor Corporation.
DS100927
) protection cir-
10092701
Key Specifications
Features
n SPiKe Protection
n Minimal amount of external components necessary
n Quiet fade-in/out mute mode
n Standby-mode
n Non-Isolated 15-lead TO-220 package
n Wide supply range 20V - 66V
Applications
n High-end stereo TVs
n Component stereo
n Compact stereo
Connection Diagram
j
j
j
THD+N at 1kHz at 2 x 25W continuous average
output power into 8Ω:
THD+N at 1kHz at continuous average
output power of 2 x 30W into 8Ω:
Standby current:
See NS Package Number TA15A
Order Number LM4765T
Non-Isolated Package
Plastic Package
Top View
0.009% (typ)
www.national.com
10092702
August 2000
6.5mA (typ)
0.1% (max)

Related parts for LM4765T/NOPB

LM4765T/NOPB Summary of contents

Page 1

... Numbers in parentheses represent pinout for amplifier B. *Optional component dependent upon specific design requirements. FIGURE 1. Typical Audio Amplifier Application Circuit SPiKe ™ Protection and Overture ™ are trademarks of National Semiconductor Corporation. © 2004 National Semiconductor Corporation Key Specifications j THD+N at 1kHz 25W continuous average output power into 8Ω: j THD+N at 1kHz at continuous average output power 30W into 8Ω ...

Page 2

... Absolute Maximum Ratings 4) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage | (No Input) Supply Voltage | (with Input) Common Mode Input Voltage Differential Input Voltage Output Current Power Dissipation (Note 6) ESD Susceptability (Note 7) ...

Page 3

Electrical Characteristics The following specifications apply for V 25˚C. Symbol Parameter (Note 2) A Open Loop Voltage Gain VOL (Note 2) GBWP Gain Bandwidth Product e Input Noise IN (Note 3) SNR Signal-to-Noise Ratio A Mute Attenuation M Standby Pin ...

Page 4

Test Circuit #1 (Note 2) (DC Electrical Test Circuit) Test Circuit #2 (Note 3) (AC Electrical Test Circuit) www.national.com 10092704 4 10092703 ...

Page 5

Bridged Amplifier Application Circuit FIGURE 2. Bridged Amplifier Application Circuit 5 10092705 www.national.com ...

Page 6

Single Supply Application Circuit FIGURE 3. Single Supply Amplifier Application Circuit Note: *Optional components dependent upon specific design requirements. Auxiliary Amplifier Application Circuit FIGURE 4. Special Audio Amplifier Application Circuit www.national.com 10092706 10092707 6 ...

Page 7

Equivalent Schematic (excluding active protection circuitry) LM4765 (One Channel Only) 7 10092708 www.national.com ...

Page 8

External Components Description Components 1 R Prevents currents from entering the amplifier’s non-inverting input which may be passed through to the load B upon power down of the system due to the low input impedance of the circuitry when the ...

Page 9

Typical Performance Characteristics THD + N vs Frequency THD + N vs Frequency THD + N vs Output Power THD + N vs Frequency 10092713 10092715 10092717 9 10092714 THD + N vs Output Power 10092716 THD + N vs ...

Page 10

Typical Performance Characteristics Clipping Voltage vs Supply Voltage Clipping Voltage vs Supply Voltage Power Dissipation vs Output Power www.national.com (Continued) 10092722 10092724 10092726 10 Clipping Voltage vs Supply Voltage 10092723 Output Power vs Load Resistance 10092725 Power Dissipation vs Output ...

Page 11

Typical Performance Characteristics Output Power vs Supply Voltage Output Mute vs Mute Pin Voltage Pulse Response (Continued) 10092728 10092730 10092732 11 Output Mute vs Mute Pin Voltage 10092729 Channel Separation vs Frequency 10092731 Large Signal Response 10092733 www.national.com ...

Page 12

Typical Performance Characteristics Power Supply Rejection Ratio Open Loop Frequency Response SPiKe Protection Response www.national.com (Continued) 10092734 10092736 10092738 12 Common-Mode Rejection Ratio 10092735 Safe Area 10092737 Supply Current vs Supply Voltage 10092739 ...

Page 13

Typical Performance Characteristics Pulse Thermal Resistance Supply Current vs Output Voltage Pulse Power Limit (Continued) 10092740 10092742 10092744 13 Pulse Thermal Resistance 10092741 Pulse Power Limit 10092743 Supply Current vs Case Temperature 10092745 www.national.com ...

Page 14

Typical Performance Characteristics Supply Current (I Standby Pin Voltage Input Bias Current vs Case Temperature www.national.com (Continued 10092746 10092748 14 Supply Current ( Standby Pin Voltage 10092747 ...

Page 15

Application Information MUTE MODE By placing a logic-high voltage on the mute pins, the signal going into the amplifiers will be muted. If the mute pins are left floating or connected to a logic-low voltage, the amplifi- ers will be ...

Page 16

Application Information Again it must be noted that the value of θ upon the system designer’s amplifier requirements. If the ambient temperature that the audio amplifier working under is higher than 25˚C, then the thermal resistance for ...

Page 17

Application Information even charging of the amplifier inputs will result in output clicks and pops due to the differential input topology of the LM4765. To achieve a transient free power-up and power-down, the voltage seen at the input terminals should ...

Page 18

... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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