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LM4919MM 데이터시트 PDF




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부품번호 LM4919MM 기능
기능 1.5V/ Mono 85mW BTL Output/ 14mW Stereo Headphone Audio Amplifier
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LM4919MM 데이터시트, 핀배열, 회로
May 2004
LM4919
1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone
Audio Amplifier
General Description
The unity gain stable LM4919 is both a mono-BTL audio
power amplifier and a Single Ended (SE) stereo headphone
amplifier. Operating on a single 1.5V supply, the mono BTL
mode delivers 85mW into an 8load at 1% THD+N. In
Single Ended stereo headphone mode, the amplifier delivers
14mW per channel into a 16load at 1% THD+N.
With the LM4919 packaged in the MM package, the cus-
tomer benefits include low profile and small size. This pack-
age minimizes PCB area and maximizes output power.
The LM4919 features circuitry that reduces output transients
("clicks" and "pops") during device turn-on and turn-off, an
externally controlled, low-power consumption, active-low
shutdown mode, and thermal shutdown. Boomer audio
power amplifiers are designed specifically to use few exter-
nal components and provide high quality output power in a
surface mount package.
Key Specifications
n Mono-BTL output power
n (RL = 8, VDD = 1.5V, THD+N = 1%)
85mW (typ)
n Stereo Headphone output power
n (RL = 16, VDD = 1.5V, THD+N = 1%) 14mW (typ)
n Micropower shutdown current
0.02µA (typ)
n Supply voltage operating range
0.9V < VDD < 2.5V
n PSRR 1kHz, VDD = 1.5V, RL = 16
72dB (typ)
Features
n Single-cell 0.9V to 2.5V battery operation
n BTL mode for mono speaker
n Single ended headphone operation with coupling
capacitors
n Unity-gain stable
n "Click and pop" suppression circuitry
n Active low micropower shutdown
n Low current, active-low mute mode
n Thermal shutdown protection circuitry
Applications
n Portable one-cell audio products
n Portable one-cell electronic devices
Typical Application
FIGURE 1. Block Diagram
20082101
Boomer® is a registered trademark of National Semiconductor Corporation.
© 2004 National Semiconductor Corporation DS200821
www.national.com




LM4919MM pdf, 반도체, 판매, 대치품
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage
Storage Temperature
Input Voltage
Power Dissipation (Note 2)
ESD Susceptibility(Note 3)
ESD Susceptibility (Note 4)
3.6V
−65˚C to +150˚C
−0.3V to VDD +0.3V
Internally limited
2000V
200V
Junction Temperature
Thermal Resistance
θJA (typ) MUB10A
Operating Ratings
Temperature Range
TMIN TA TMAX
Supply Voltage
150˚C
175˚C/W
−40˚C TA 85˚C
0.9V VDD 2.5V
Electrical Characteristics for the LM4919 (Notes 1, 5)
The following specifications apply for the circuit shown in Figure 4 operating with VDD = 1. 5V, unless otherwise
specified. Limits apply for TA = 25˚C.
Symbol
Parameter
Conditions
LM4919
Units
Typical Limit
(Limits)
(Note 6) (Note 7)
VDD Supply Voltage (Notes 10, 11)
0.9 V (min)
2.5 V (max)
IDD Quiescent Power Supply Current VIN = 0V, IO = 0A, RL = (Note 8)
ISD Shutdown Current
VSHUTDOWN = GND
VOS Output Offset Voltage
BTL
f = 1kHz
0.9
0.02
5
1.4 mA (max)
µA
50 mV (max)
PO
THD+N
VNO
Output Power (Note 9)
Total Harmonic Distortion + Noise
Output Voltage Noise
RL = 8BTL, THD+N = 1%
RL = 16SE, THD+N = 1%
RL = 8, BTL, PO = 25mW, f = 1kHz
RL = 16, SE, PO = 5mW, f = 1kHz
20Hz to 20kHz, A-weighted SE
20Hz to 20kHz, A-weighted BTL
IMUTE Mute Current
Crosstalk
PSRR Power Supply Rejection Ratio
VMUTE = 0, SE
RL = 16, SE
VRIPPLE = 200mVP-P
CBYPASS = 4.7µF, RL = 8
f = 1kHz, BTL
VRIPPLE = 200mVP-P sine wave
CBYPASS = 4.7µF, RL = 16
f = 1kHz, SE
85
14
0.2
0.07
10
15
15
55
70
70 mW (min)
mW (min)
0.5 % (max)
µVRMS
µVRMS
µA
dB
dB
72 dB
VIH Control Logic High
VIL Control Logic Low
0.9 V
0.3 V
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which
guarantee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit
is given, however, the typical value is a good indication of device performance.
Note 2: The maximum power dissipation is dictated by TJMAX, θJA, and the ambient temperature TA and must be derated at elevated temperatures. The maximum
allowable power dissipation is PDMAX = (TJMAX − TA)/θJA. For the LM4919, TJMAX = 150˚C. For the θJAs, please see the Application Information section or the
Absolute Maximum Ratings section.
Note 3: Human body model, 100pF discharged through a 1.5kresistor.
Note 4: Machine model, 220pF–240pF discharged through all pins.
Note 5: All voltages are measured with respect to the ground (GND) pins unless otherwise specified.
Note 6: Typicals are measured at 25˚C and represent the parametric norm.
Note 7: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 8: The quiescent power supply current depends on the offset voltage when a practical load is connected to the amplifier.
Note 9: Output power is measured at the device terminals.
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LM4919MM 전자부품, 판매, 대치품
Typical Performance Characteristics (Continued)
Output Power
vs Load Resistance
VDD = 1.2V, RL = 16, f = 1kHz
Single Ended Output, AV = -1
Output Power
vs Load Resistance
VDD = 1.2V, RL = 8, f = 1kHz
BTL Output, AV = -1
200821E3
Power Dissipation vs Output Power
f = 1kHz, AV = -1
Single Ended Output, Both Channels
200821E4
Power Dissipation vs Output Power
f = 1kHz, AV = -1
BTL Output
20082124
Channel Separation
RL = 16, PO = 5mW
Single Ended Output, AV = -1
20082123
Power Supply Rejection Ratio
VDD = 1.5V, VRIPPLE = 200mVPP
RL = 16, Single Ended Output
Input Terminated into 10
20082110
7
20082121
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관련 데이터시트

부품번호상세설명 및 기능제조사
LM4919MM

1.5V/ Mono 85mW BTL Output/ 14mW Stereo Headphone Audio Amplifier

National Semiconductor
National Semiconductor

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