LM4889

更新时间： 2024-02-16 17:07:40

品牌	Logo	应用领域
美国国家半导体 - NSC		放大器功率放大器
页数	文件大小	规格书
19页	760K
描述
1 Watt Audio Power Amplifier

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技术参数
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LM4889 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	包装说明：	TSSOP, TSSOP8,.19
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.33.00.01	风险等级：	0.85
商用集成电路类型：	AUDIO AMPLIFIER	增益：	36 dB
JESD-30 代码：	R-PDSO-G8	JESD-609代码：	e3
长度：	3 mm	湿度敏感等级：	1
信道数量：	1	功能数量：	1
端子数量：	8	最高工作温度：	85 °C
最低工作温度：	-40 °C	标称输出功率：	1.2 W
封装主体材料：	PLASTIC/EPOXY	封装代码：	TSSOP
封装等效代码：	TSSOP8,.19	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	峰值回流温度（摄氏度）：	260
电源：	2.6/5 V	认证状态：	Not Qualified
座面最大高度：	1.07 mm	子类别：	Audio/Video Amplifiers
最大压摆率：	8 mA	最大供电电压 (Vsup)：	5.5 V
最小供电电压 (Vsup)：	2.2 V	表面贴装：	YES
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	GULL WING	端子节距：	0.65 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	3 mm	Base Number Matches：	1

LM4889 数据手册

Electrical Characteristics V_DD= 2.6V (Notes 1, 2)

The following specifications apply for V_DD= 2.6V, A_V= 2, and 8Ω load unless otherwise specified. Limits apply for T_A= 25˚C.

LM4889

Units

Symbol

I_DD

Parameter

Conditions

Typical

(Note 6)

2.6

Limit

(Limits)

(Notes 7, 9)

Quiescent Power Supply Current

V_IN= 0V, I_o= 0A, no Load

V_IN= 0V, I_o= 0A, with BTL Load

V_shutdown= GND (Note 8)

THD = 1% (max); f = 1 kHz

P_o= 0.1Wrms; f = 1kHz

V_ripple= 200mV sine p-p

f_ripple= 217Hz

mA (max)

µA (max)

3.0

I_SD

Shutdown Current

0.01

Output Power ( 8Ω )

Output Power ( 4Ω )

0.2

P₀

0.22

THD+N

Total Harmonic Distortion+Noise

0.08

PSRR

Power Supply Rejection Ratio

f_ripple= 1kHz

Note 1: All voltages are measured with respect to the ground pin, unless otherwise specified.

Note 2: 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 3: The maximum power dissipation must be derated at elevated temperatures and is dictated by T

, θ , and the ambient temperature T . The maximum

JMAX JA

allowable power dissipation is P

= (T

–T )/θ or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4889, see power derating

DMAX

JMAX A JA

currents for additional information.

Note 4: Human body model, 100 pF discharged through a 1.5 kΩ resistor.

Note 5: Machine Model, 220 pF–240 pF discharged through all pins.

Note 6: Typicals are measured at 25˚C and represent the parametric norm.

Note 7: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).

Note 8: For micro SMD only, shutdown current is measured in a Normal Room Environment. Exposure to direct sunlight will increase I by a maximum of 2µA.

Note 9: Datasheet min/max specification limits are guaranteed by design, test or statistical analysis.

Note 10: All bumps have the same thermal resistance and contribute equally when used to lower thermal resistance. The LM4889ITL demo board (views featured

in the Application Information section) has two inner layers, one for V and one for GND. The planes each measure 600mils x 600mils (15.24mm x 15.24mm)

and aid in spreading heat due to power dissipation within the IC.

External Components Description

(Figure 1)

Components

Functional Description

R_i

Inverting input resistance which sets the closed-loop gain in conjunction with R_f. This resistor also forms a

high pass filter with C_iat f_C= 1/(2π R_iC_i).

C_i

Input coupling capacitor which blocks the DC voltage at the amplifiers input terminals. Also creates a

highpass filter with R_iat f_c= 1/(2π R_iC_i). Refer to the section, Proper Selection of External Components,

for an explanation of how to determine the value of C_i.

R_f

Feedback resistance which sets the closed-loop gain in conjunction with R_i. A_VD= 2 (R_f/R_i).

C_S

Supply bypass capacitor which provides power supply filtering. Refer to the Power Supply Bypassing

section for information concerning proper placement and selection of the supply bypass capacitor.

Bypass pin capacitor which provides half-supply filtering. Refer to the section, Proper Selection of External

Components, for information concerning proper placement and selection of C_B.

C_B

www.national.com

1 2 345 6 7...19

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LM4889ITLX/NOPB	TI	1 Watt Audio Power Amplifier	获取价格
LM4889LD/NOPB	TI	1W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO10, LLP-10	获取价格
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