LM4817MH National Semiconductor, LM4817MH Datasheet
![](/photos/31/58/315808/28pin_tssop_ep_sml.jpg)
LM4817MH
Specifications of LM4817MH
Available stocks
Related parts for LM4817MH
LM4817MH Summary of contents
Page 1
... LDO has over-current protection n Thermal shutdown protection circuitry n TSSOP (MH) package Applications n Multimedia monitors n Portable and desktop computers n Portable televisions 20078129 Top View Order Number LM4817MH See NS Package Number MXA28A for TSSOP DS200781 February 2006 = 5V, THD+N ≤ 1 8Ω 1.0W(typ 3.0V to 5.5V 2.5V to 6.0V 0.07µ ...
Page 2
Typical Application www.national.com 2 20078101 ...
Page 3
... Absolute Maximum Ratings Stereo Amplifier (Notes Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Amplifier Supply Voltage (pins 5, 24) LDO-V , LDO-OUT, LDO-SHDN, CC ADJ, CC, FAULT (pins 11-15, 17,19) Fault Sink Current Storage Temperature ...
Page 4
LDO Electrical Characteristics Unless otherwise specified, all limits guaranteed for 25˚C. Boldface limits apply for the operating temperature extremes: −40˚C and 85˚C. J Symbol Parameter V Input Voltage IN ∆V Output Voltage Tolerance O V Output Adjust ...
Page 5
Stereo Amplifier Typical Performance Characteristics THD+N vs Frequency 8Ω OUT THD+N vs Frequency V = 5.5V 8Ω OUT THD+N vs Output Power ...
Page 6
Stereo Amplifier Typical Performance Characteristics Output Power vs Supply Voltage R = 8Ω 1kHz, at (from top to bottom at 4.5V THD+N = 10%, THD Power Dissipation vs Load Dissipation V = 5V, f ...
Page 7
Stereo Amplifier Typical Performance Characteristics Cross Talk 8Ω 150mW, at (from top to bottom DD L OUT at 2kHz): -IN A driven, V measured; OUTB -IN B driven, V measured OUTA PSRR vs ...
Page 8
Stereo Amplifier Typical Performance Characteristics Open Loop Frequency Response THD+N vs Output Power 8Ω (from left to right at 7% THD+N 2V, 1.9V, 1.8V, 1.7V, 1.6V, 1.5V, 1.0V, 0.5V, ...
Page 9
LDO Typical Performance Characteristics C = 2.2µ 33nF 25˚C, V OUT CC J Dropout Voltage vs Load Current (For Different Output Voltages) FAULT Detect Threshold vs Load Current Supply Current vs Load Current Unless otherwise specified, ...
Page 10
LDO Typical Performance Characteristics C = 2.2µ 33nF 25˚C, V OUT CC J Output Noise Spectral Density Output Impedance vs Frequency Load Transient www.national.com Unless otherwise specified (Continued) SHDN IN Output Noise ...
Page 11
LDO Typical Performance Characteristics C = 2.2µ 33nF 25˚C, V OUT CC J Power-Up Response External Components Description (Refer to Figure 1 ). Components 1. R The Inverting input resistance, along with R i filter with ...
Page 12
Application Information BRIDGE CONFIGURATION EXPLANATION * Refer to the section Proper Selection of External Components, for a detailed discussion of C FIGURE 1. Typical Audio Amplifier Application Circuit Pin out shown for the LLP package. Refer to the Connection Diagrams ...
Page 13
Application Information The LM4817 has two operational amplifiers per channel. The maximum internal power dissipation per channel operating in the bridge mode is four times that of a single-ended ampli- fier. From Equation (3), assuming a 5V power supply and ...
Page 14
Application Information SELECTING PROPER EXTERNAL COMPONENTS Optimizing the LM4817’s performance requires properly se- lecting external components. Though the LM4817 operates well when using external components with wide tolerances, best performance is achieved by optimizing component val- ues. The LM4817 is ...
Page 15
Application Information AUDIO POWER AMPLIFIER DESIGN Audio Amplifier Design: Driving 1W into an 8Ω Load The following are the desired operational parameters: Power Output: Load Impedance: Input Level: Input Impedance: Bandwidth: 100Hz−20 kHz The design begins by specifying the minimum ...
Page 16
Application Information type of regulator can be represented amp config- ured as non-inverting amplifier and a fixed DC Voltage (V ) for its input signal. The special characteristic of this REF op amp is its extra-large output ...
Page 17
Application Information the error amplifier. The second term expresses the zero (numerator) and pole (denominator) of the load in combina- tion with the R of the regulator. O Figure 5 shows a Bode plot that represents a case where the ...
Page 18
Application Information Power Dissipation Power dissipation refers to the part’s ability to radiate heat away from the silicon, with packaging being a key factor. A reasonable analogy is the packaging a human being might wear, a jacket for example. A ...
Page 19
Application Information FIGURE 7. Minimum Battery Detector that Disconnects the Load Via the SHDN Pin of the LM4817 Resistor value for V and V are determined as follows (The application of Figure 6 used The ...
Page 20
Application Information FIGURE 10. Recommended MH board layout: bottom-side layout Revision History Rev Date 1.0 2/08/06 www.national.com (Continued) 20078148 Description Changed the Limit (from 3 Entire IC) table, then re-released D/S to the WEB. 20 (Stereo ...
Page 21
... Tel: 1-800-272-9959 Deutsch Tel: +49 (0) 69 9508 6208 English www.national.com Français Tel: +33 ( 8790 Order Number LM4817MH NS Package Number MXA28A 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system affect its safety or effectiveness ...