Datasheet > LM1876TF

LM1876TF

更新时间： 2024-01-17 03:17:49

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
16页	596K
描述
Overture⑩ Audio Power Amplifier Series Dual 20W Audio Power Amplifier with Mute and Standby Modes

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LM1876TF 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	SFM
包装说明：	TO-220, ZIP15,.2,.17TB	针数：	3
Reach Compliance Code：	not_compliant	ECCN代码：	EAR99
HTS代码：	8542.33.00.01	Factory Lead Time：	6 weeks
风险等级：	0.93	标称带宽：	20 kHz
商用集成电路类型：	AUDIO AMPLIFIER	增益：	110 dB
谐波失真：	0.009%	JESD-30 代码：	R-PZFM-T15
JESD-609代码：	e3	长度：	20.015 mm
湿度敏感等级：	1	信道数量：	2
功能数量：	1	端子数量：	15
最高工作温度：	85 °C	最低工作温度：	-20 °C
标称输出功率：	22 W	封装主体材料：	PLASTIC/EPOXY
封装代码：	TO-220	封装等效代码：	ZIP15,.2,.17TB
封装形状：	RECTANGULAR	封装形式：	FLANGE MOUNT
峰值回流温度（摄氏度）：	260	认证状态：	Not Qualified
座面最大高度：	4.62 mm	子类别：	Audio/Video Amplifiers
最大压摆率：	80 mA	最大供电电压 (Vsup)：	22 V
最小供电电压 (Vsup)：	22 V	表面贴装：	NO
技术：	BIPOLAR	温度等级：	OTHER
端子面层：	Matte Tin (Sn)	端子形式：	THROUGH-HOLE
端子节距：	1.27 mm	端子位置：	ZIG-ZAG
处于峰值回流温度下的最长时间：	40	宽度：	19.583 mm
Base Number Matches：	1

LM1876TF 数据手册

External Components Description

Components

Functional Description

R_B

Prevents currents from entering the amplifier’s non-inverting input which may be passed through to the

load upon power down of the system due to the low input impedance of the circuitry when the

undervoltage circuitry is off. This phenomenon occurs when the supply voltages are below 1.5V.

R_i

R_f

Inverting input resistance to provide AC gain in conjunction with R_f.

Feedback resistance to provide AC gain in conjunction with R_i.

C_i

Feedback capacitor which ensures unity gain at DC. Also creates a highpass filter with R_iat f_C

(Note 14)

1/(2πR_iC_i).

C_S

Provides power supply filtering and bypassing. Refer to the Supply Bypassing application section for

proper placement and selection of bypass capacitors.

R_V

Acts as a volume control by setting the input voltage level.

(Note 14)

R_IN

Sets the amplifier’s input terminals DC bias point when C_INis present in the circuit. Also works with C_INto

(Note 14)

create a highpass filter at f_C1/(2πR_INC_IN). Refer to Figure 4.

C_IN

(Note 14)

Input capacitor which blocks the input signal’s DC offsets from being passed onto the amplifier’s inputs.

Works with C_SNto stabilize the output stage by creating a pole that reduces high frequency instabilities.

Works with R_SNto stabilize the output stage by creating a pole that reduces high frequency instabilities.

R_SN

(Note 14)

C_SN

(Note 14)

The pole is set at f_C1/(2πR_SNC_SN). Refer to Figure 4.

L (Note 14)

Provides high impedance at high frequencies so that R may decouple a highly capacitive load and reduce

the Q of the series resonant circuit. Also provides a low impedance at low frequencies to short out R and

pass audio signals to the load. Refer to Figure 4.

R (Note 14)

R_A

C_A

Provides DC voltage biasing for the transistor Q1 in single supply operation.

Provides bias filtering for single supply operation.

R_INP

Limits the voltage difference between the amplifier’s inputs for single supply operation. Refer to the Clicks

(Note 14)

and Pops application section for a more detailed explanation of the function of R_INP

Provides input bias current for single supply operation. Refer to the Clicks and Pops application section

for a more detailed explanation of the function of R_BI

R_BI

R_E

Establishes a fixed DC current for the transistor Q1 in single supply operation. This resistor stabilizes the

half-supply point along with C_A.

Note 14: Optional components dependent upon specific design requirements.

Typical Performance Characteristics

THD + N vs Frequency

DS012072-13

DS012072-14

DS012072-15

www.national.com

1...4 5 678 9 10...16

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