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Details, datasheet, quote on part number:LM4665LDX
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| Part: | LM4665LDX |
| Category: | Multimedia => Audio => Amplifiers => Power Amplifiers => Boomer Audio Power Amplifiers |
| Description: | LM4665 - Filterless High Efficiency 1W Switching Audio Amplifier, Package: Microsmd, Pin Nb=9 |
| Company: | National Semiconductor Corporation |
| Datasheet: | Download LM4665LDX datasheet File size : 1043 kB |
| Request For quote: | Find where to buy LM4665LDX
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Datasheet text preview:
LM4665 Filterless High Efficiency 1W Switching Audio Amplifier
December 2002
LM4665 Filterless High Efficiency 1W Switching Audio Amplifier
General Description
The LM4665 is a fully integrated single-supply high efficiency switching audio amplifier. It features an innovative modulator that eliminates the LC output filter used with typical switching amplifiers. Eliminating the output filter reduces parts count, simplifies circuit design, and reduces board area. The LM4665 processes analog inputs with a delta-sigma modulation technique that lowers output noise and THD when compared to conventional pulse width modulators. The LM4665 is designed to meet the demands of mobile phones and other portable communication devices. Operating on a single 3V supply, it is capable of driving 8 transducer loads at a continuous average output of 400mW with less than 2%THD+N. The LM4665 has high efficiency with an 8 transducer load compared to a typical Class AB amplifier. With a 3V supply, the IC's efficiency for a 100mW power level is 75%, reaching 80% at 400mW output power. The LM4665 features a low-power consumption shutdown mode. Shutdown may be enabled by either a logic high or low depending on the mode selection. Connecting the Shutdown Mode pin to either VDD (high) or GND (low) enables the Shutdown pin to be driven in a likewise manner to activate shutdown. The LM4665 has fixed selectable gain of either 6dB or 12dB. The LM4665 has short circuit protection against a short from the outputs to VDD, GND or across the outputs.
Key Specifications
j Efficiency at 100mW into 8 transducer j Efficiency at 400mW into 8 transducer j Total quiescent power supply current (3V) j Single supply range (MSOP & LD) j Single supply range (ITL) (Note 11)
75%(typ) 80%(typ) 3mA(typ) 2.7V to 5.5V 2.7V to 3.8V
j Total shutdown power supply current (3V) 0.01µA(typ)
Features
n n n n n n n n n No output filter required for inductive transducers Selectable gain of 6dB (2V/V) or 12dB (4V/V) Very fast turn on time: 5ms (typ) User selectable shutdown High or Low logic level Minimum external components "Click and pop" suppression circuitry Micro-power shutdown mode Short circuit protection micro SMD, LLP, and MSOP packages (no heat sink required)
Applications
n Mobile phones n PDAs n Portable electronic devices
Typical Application
20027001
FIGURE 1. Typical Audio Amplifier Application Circuit
Boomer ® is a registered trademark of National Semiconductor Corporation.
© 2002 National Semiconductor Corporation
DS200270
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LM4665
Connection Diagrams
Mini Small Outline (MSOP) Package 9 Bump micro SMD Package
20027023
Top View Order Number LM4665MM See NS Package Number MUB10A
20027036
Top View Order Number LM4665ITL, LM4665ITLX See NS Package Number TLA09AAA MSOP Marking
LLP Package
200270C5
Top View G - Boomer Family C5 - LM4665MM
200270D0
Top View Order Number LM4665LD See NS Package Number LDA10B micro SMD Marking
200270C6
Top View X - Date Code T- Die Traceability G - Boomer Family A2 - LM4665ITL
200270C9
Top View Z - Plant Code XY - Date Code TT- Die Traceability Bottom Line-Part Number
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2
LM4665
Absolute Maximum Ratings
2)
(Notes 1,
JC (MSOP) JA (micro SMD) JA (LLP) (Note 10) JC (LLP) (Note 10) Soldering Information See AN-1112 "microSMD Wafers Level Chip Scale Package."
56°C/W 180°C/W 63°C/W 12°C/W
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (Note 1) Storage Temperature Voltage at Any Input Pin Power Dissipation (Note 3) ESD Susceptibility (Note 4) ESD Susceptibility (Note 5) Junction Temperature (TJ) Thermal Resistance JA (MSOP) 190°C/W 6.0V -65°C to +150°C VDD + 0.3V V GND - 0.3V Internally Limited 2.0kV 200V 150°C
Operating Ratings (Note 2)
Temperature Range TMIN TA TMAX Supply Voltage (MSOP & LD) Supply Voltage (ITL) (Note11) -40°C TA 85°C 2.7V VDD 5.5V 2.7V VDD 3.8V
Electrical Characteristics VDD = 5V (Notes 1, 2, 11) The following specifications apply for VDD = 5V, RL = 8 + 33µH, measurement bandwidth is < 10Hz - 22kHz unless otherwise specified. Limits apply for TA = 25°C.
LM4665 Symbol IDD ISD VSDIH VSDIL VSDIH VSDIL VGSIH VGSIL AV AV VOS TWU Po THD+N RIN PSRR Parameter Quiescent Power Supply Current Shutdown Current Shutdown Voltage Input High Shutdown Voltage Input Low Shutdown Voltage Input High Shutdown Voltage Input Low Gain Select Input High Gain Select Input Low Closed Loop Gain Closed Loop Gain Output Offset Voltage Wake-up Time Output Power Total Harmonic Distortion+Noise Differential Input Resistance Power Supply Rejection Ratio THD+N = 3% (max), fIN = 1kHz PO = 400mWRMS, fIN = 1kHz VGain VGain
Select Select
Conditions VIN = 0V, No Load VIN = 0V, 8 + 22µH Load VSD = VSD VSD VSD VSD VSD
Mode Mode Mode Mode Mode
Typical (Note 6) 14 14.5 0.1 1.2 1.1 1.2 1.1 1.2 1.1
Limit (Notes 7, 8)
Units (Limits) mA mA
(Note 9)
5.0 1.4 0.4 1.4 0.4 1.4 0.4 5.5 6.5 11.5 12.5
µA (max) V (min) V (max) V (min) V (max) V (min) V (max) dB (min) dB (max) dB (min) dB (max) mV ms W % k k dB
= VDD = VDD = GND = GND
VGain VGain
Select
= VDD = GND
6 12 10 5 1.4 0.8 100 65 52
Select
= VDD, Gain = 6dB = GND, Gain = 12dB
VRipple = 100mVRMS, fRipple = 217Hz, AV = 6dB Inputs Terminated VRipple = 100mVRMS, fRipple = 217Hz, AV = 6dB A-Weighted filter, VIN = 0V
CMRR eN
Common Mode Rejection Ratio Output Noise Voltage
43 350
dB µV
3
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