TA8227AP中文资料

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TA8221AHQ中文资料

TOSHIBA Bipolar Linear Integrated Circuit Silicon MonolithicTA8221AHQ,TA8221ALQ30W BTL × 2Ch Audio Power AmplifierThe thermal resistance θj −T of TA8221AHQ, TA8221ALQpackage designed for low thermal resistance, has a high efficiency of heat radiation.The temperature rise of chip can be reduced, and the influence from the degradation of the features due to the temperature rise at the high output can also be reduced.This stereo audio power IC, designed for car audio use, has two built −in channels to reduce the characteristic difference between L and R channels.It also contains various kind of protection.Features• Low thermal resistance: θj −T = 1.5°C / W (infinite heat sink) • High power: P OUT (1) = 30W (typ.) / channel(V CC = 14.4V, f = 1kHz, THD = 10%, R L =2Ω) P OUT (2) = 26W (typ.) / channel(V CC = 13.2V, f = 1kHz, THD = 10%, R L = 2Ω) P OUT (3) = 19W (typ.) / channel(V CC = 13.2V, f = 1kHz, THD = 10%, R L = 4Ω)• Low distortion ratio: THD = 0.04% (typ.) (V CC = 13.2V, f = 1kHz, P OUT = 1W, R L = 4Ω, G V = 50dB) • Low noise: V NO = 0.30mV rms (typ.) (V CC = 13.2V, R L = 4Ω, G V 50dB, R g = 0Ω, BW = 20Hz~20kHz) • Built −in stand −by function (with pin(4) set at low, power is turned off.): I SB = 100µA (typ.) • Built−in muting function (with pin(1) set at low, power is turned off.) • Built−in various protection circuitsProtection circuits: Thermal shut down, Over voltage, Out →V CC short, Out →GND short and Out −Out short. • Operating supply voltage: V CC (opr) = 9~18VTA8221AHQTA8221ALQWeightHZIP17−P −2.00 : 9.8g (typ.) HSIP17−P −2.00 : 9.8g (typ.)Block DiagramTA8221AHQ, TA8221ALQ (G V = 50dB)Cautions And Application Method(description is made only on the single channel.)1. Voltage gain adjustmentThis IC has the amplifier construction as shown Fig.1. The pre−amp (amp 1) is provided to the primary stage, and the input voltage is amplified by the flat amps, amp 3 and amp 4 of each channel through the phase amp (amp 2).Since the input offset is prevented by pre−amp when V CC is set to on, this circuit can remarkably reduce the pop noise.The total closed loop gain G V of this IC can be obtained by expression below when the closed loop voltage gain of amp 1 is G V1.(dB) R2f R R2)f (R R1 og 20 V1G +++=l (1)The closed loop voltage gain of power amp, amp 3 and amp 4 is fixed at G V3≒G V4 = 20dB.Therefore, the total closed circuit voltage gain G V is obtained through BTL connection by the expression below. G V = G V1 + G V3 + 6 (dB) (2)For example, when Rf = 0Ω, G V is obtained by the expressions (1) and (2) as shown below. G V ≒24 + 20 + 6 = 50dBThe voltage gain is reduced when R f is increased. (Fig.2) With the voltage gain reduced, since (1) the oscillation stability is reduced, and (2) the pop noise changes when V CC is set to on, refer to the items 3 and 4.2. Stand −by SW functionBy means of controlling pin(4) (stand −by terminal) to high and low, the power suply can be set to on and off. The threshold voltage of pin(4) is set at 2.1V (3V BE .),and the power supply current is about 100µA (typ.) at the stand −by state.Control voltage of pin(4): V (SB)Stand −by Power V (SB) (V)On Off 0~2 Off On 3~V CCAdvantage of stand −by SW(1) Since V CC can directly be controlled to on / off by the microcomputer, the switching relay can be omitted. (2) Since the control current is microscopic, the switching relay of small current capacity is satisfactory forswitching.3. Preventive measure against oscillationFor preventing the oscillation, it is advisable to use C4, the condenser of polyester film having small characteristic fluctuation of the temperature and the frequency.The condenser (C6) between input and GND is effective for preventng oscillation which is generated with a feedback signal from an output stage.The resistance R to be series applied to C4 is effective for phase correction of high frequency, and improves the oscillation allowance.(1) Voltage gain to be used (G V setting)(2) Capacity value of condenser(3) Kind of condenser(4) Layout of printed boardIn case of its use with the voltage gain G V reduced or with the feedback amount increased, care must be taken because the phase−inversion is caused by the high frequency resulting in making the oscillation liable generated.4. Adjustment of output offset (when the power supply turn on)As this IC is contructed with DC circuit on the primary stage, it is necessary to lower a input offset or output offset by agreement with the each leading edge time constant of the input voltage in the primary stage and NF terminal voltage.Concretely, monitor the output DC voltage and vary the capacity value in input condenser and NF condenser (see Fig.4)(reference) In case of setting the condition (G V = 40dB) with R f = 470Ω.5. Muting functionThrough setting pin(1) (mute terminal) at about 1V or less, mutingbecomes possible.The interval circuit of IC is shown in Fig.5.When pin(1) is set to low, Q1 and Q2 are turned to on, the chargeof the ripple condenser is discharged and the bias is cut. The muteamount of 60dB or over can be obtained.Since this muting function rapidly discharge the charge of the ripplefilter capacitor of pin(8), the pop noise is generated by the DCfluctuation of the bias section.Therefore, this muting function is not appropriate to the audio muting but itis effective in muting at V CC→on.6. Rapid ripple discharging circuit at the time of V CC offThis circuit is effective in such a mode where the V CC and the stand−by terminals become high / low simultaneously ; for instance, for a pop noise produced when the power is turned on / off repeatedly by operating the ignition key.If V CC is off, V CC≒7V is detected internally on IC and(1) The power stage bias circuit is cut, and(2) Pin(8) : Ripple capacitor is rapidly discharged by turning Q3 on and then Q1 and Q2 on. (Precaution 1)When the stand−by terminal was put to the low level after the ripple rapiddischarging circuit was operated (V CC≒7V) at the time when V CC was turnedoff, a pop noise may be generated. Therefore, V CC which makes the stand−byterminal low shall be set at 8V or above so that (1) the stand−by terminal isput at the low level and (2) the ripple rapid discharging circuit is turned onwhen V CC is turned off (in order of (1) and (2)).An example of application is shown in (Fig.7).(Precaution 2)If the falling time constant of the V CC line is large (the fall is gentle), the pop noise may become worse.In this case, it is possible to prevent the pop noise from beoming worse by reducing the capacity of "ripple rapid discharging circuit at the time of V CC off" accordign to the following steps :(a) Short pin(1) (mute terminal) and pin(8) (ripple terminal).(b) Increase the capacity of ripple capacitor of pin(8).However, it shall be kept in mind that the time for turning the power on becomes longer as the result of step (b).Absolute Maximum Ratings (Ta = 25°C)Characteristic Symbol Rating UnitPeak supply voltage (0.2s) V CC (surge)50VDC supply voltage V CC (DC) 25 V Operating supply voltage V CC (opr) 18 V Output current (peak) I O (peak) 9 A Power dissipation P D 50 W Operating temperature T opr −30~85 °C Storage temperatureT stg−55~150 °CElectrical Characteristics(unless otherwise specified, V CC = 13.2V, R L = 4Ω, f = 1kHz, Ta = 25°C)Characteristic Symbol Test Cir −cuitTest ConditionMin.Typ.Max.UnitQuiescent supply currentI CCQ ― V IN = 0― 120 250 mA P OUT (1)― V CC = 14.4V, R L = 2Ω, THD = 10%― 30 ― P OUT (2) ― R L = 2Ω, THD = 10% 17 26 ― Output powerP OUT (3)― THD = 10% 1619―WTotal harmonic distortion THD ― P OUT = 1W― 0.04 0.4 % Voltage gain G V ― ― 48 50 52 dB Voltage gain ratio ∆G V ― ―−1.0 0 1.0 dB Output noise voltageV NO ―R g = 0Ω,BW = 20Hz~20kHz ― 0.3 0.7 mV rms Ripple rejection ratio R.R. ― fripple = 100Hz, R g = 600Ω40 54 ― dB Input resistance R IN ― ―― 30 ―k ΩOutput offset voltage V offset ― V IN = 0−100 0 100 mV Current at stand −by state I SB ― ―― 100 150 µA Cross talkC.T.―R g = 600Ω,V OUT = 0.775V rms (0dBm) ― 60 ― dBPin(4) control voltage V SB ― Stand −by → off (power →on) 2.5 ―V CC VPin(1) control voltageV (mute)―Mute →on (power →off)― 1.0 2.0 VTest circuitTA8221AHQ, TA8221ALQ (G V = 50dB)Weight : 9.8g (typ.)Weight : 9.8g (typ.)•Use an appropriate power supply fuse to ensure that a large current does not continuously flow in case of over current and/or IC failure. The IC will fully break down when used under conditions that exceed its absolute maximum ratings, when the wiring is routed improperly or when an abnormal pulse noise occurs from the wiring or load, causing a large current to continuously flow and the breakdown can lead smoke or ignition. To minimize the effects of the flow of a large current in case of breakdown, appropriate settings, such as fuse capacity, fusing time and insertion circuit location, are required.•If your design includes an inductive load such as a motor coil, incorporate a protection circuit into the design to prevent device malfunction or breakdown caused by the current resulting from the inrush current at power ON or the negative current resulting from the back electromotive force at power OFF. For details on how to connect a protection circuit such as a current limiting resistor or back electromotive force adsorption diode, refer to individual IC datasheets or the IC databook. IC breakdown may cause injury, smoke or ignition.•Use a stable power supply with ICs with built-in protection functions. If the power supply is unstable, the protection function may not operate, causing IC breakdown. IC breakdown may cause injury, smoke or ignition.•Carefully select external components (such as inputs and negative feedback capacitors) and load components (such as speakers), for example, power amp and regulator. If there is a large amount of leakage current such as input or negative feedback condenser, the IC output DC voltage will increase. If this output voltage is connected toa speaker with low input withstand voltage, overcurrent or IC failure can cause smoke or ignition. (The overcurrent can cause smoke or ignition from the IC itself.) In particular, please pay attention when using a Bridge Tied Load (BTL) connection type IC that inputs output DC voltage to a speaker directly.•Over current Protection CircuitOver current protection circuits (referred to as current limiter circuits) do not necessarily protect ICs under all circumstances. If the Over current protection circuits operate against the over current, clear the over current status immediately. Depending on the method of use and usage conditions, such as exceeding absolute maximum ratings can cause the over current protection circuit to not operate properly or IC breakdown before operation. In addition, depending on the method of use and usage conditions, if over current continues to flow for a long time after operation, the IC may generate heat resulting in breakdown.•Thermal Shutdown CircuitThermal shutdown circuits do not necessarily protect ICs under all circumstances. If the Thermal shutdown circuits operate against the over temperature, clear the heat generation status immediately. Depending on the method of use and usage conditions, such as exceeding absolute maximum ratings can cause the thermal shutdown circuit to not operate properly or IC breakdown before operation.•Heat Radiation DesignWhen using an IC with large current flow such as power amp, regulator or driver, please design the device so that heat is appropriately radiated, not to exceed the specified junction temperature (Tj) at any time and condition.These ICs generate heat even during normal use. An inadequate IC heat radiation design can lead to decrease in IC life, deterioration of IC characteristics or IC breakdown. In addition, please design the device taking into considerate the effect of IC heat radiation with peripheral components.•Installation to Heat SinkPlease install the power IC to the heat sink not to apply excessive mechanical stress to the IC. Excessive mechanical stress can lead to package cracks, resulting in a reduction in reliability or breakdown of internal IC chip. In addition, depending on the IC, the use of silicon rubber may be prohibited. Check whether the use of silicon rubber is prohibited for the IC you intend to use, or not. For details of power IC heat radiation design and heat sink installation, refer to individual technical datasheets or IC databooks.RESTRICTIONS ON PRODUCT USE060116EBF •The information contained herein is subject to change without notice. 021023_D•TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such TOSHIBA products could cause loss of human life, bodily injury or damage to property.In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability Handbook” etc. 021023_A• The TOSHIBA products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc. Unintended Usage of TOSHIBA products listed in this document shall be made at the customer’s own risk. 021023_B•The products described in this document shall not be used or embedded to any downstream products of which manufacture, use and/or sale are prohibited under any applicable laws and regulations. 060106_Q• The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of TOSHIBA or others. 021023_C•The products described in this document are subject to the foreign exchange and foreign trade laws. 021023_E •This product generates heat during normal operation. However, substandard performance or malfunction may cause the product and its peripherals to reach abnormally high temperatures.The product is often the final stage (the external output stage) of a circuit. Substandard performance or malfunction of the destination device to which the circuit supplies output may cause damage to the circuit or to the product. 030619_RAbout solderability, following conditions were confirmed• Solderability(1) Use of Sn-37Pb solder Bath· solder bath temperature = 230°C· dipping time = 5 seconds· the number of times = once· use of R-type flux(2) Use of Sn-3.0Ag-0.5Cu solder Bath· solder bath temperature = 245°C· dipping time = 5 seconds· the number of times = once· use of R-type flux。

TA7680AP

TA7680APTA7680AP 是东芝公司生产的图像及伴音中放处理集成电路与TA7698AP 相组合构成东芝两片机芯集成电路内部含有图像中频放大视频检波视频放大AFT 检波黑白噪声反相高频AGC 放大中频AGC 放大伴音调频检波及音频放大等电路另外芯片还具有中频放大增益高频带宽信杂比高等特点海信电器股份有限公司在精品系列的产品中使用了TA7680AP 集成电路其主要机型有SR4715SR5407SR5416SR5427SR5446TC2138等直流电压V对地电阻引脚序号功能动态静态红笔接地黑笔接地1 地 0 00 0 2 伴音信号输出2.2V 2.5V 350 10k 3 空脚 6.8V 6.5V 280 3k 4 伴音系统地端 00 0 0 5 中频AGC 定时电容8.7V 1.0V 300 170 6 滤波电容 4.8V 4.2V 1k 140 7 图象中频输入 3.8V 4.5V 1k8 图象中频输入 3.8V 4.2V 8009 滤波电容 3.8V 4.2V 700 140 10 高放AGC 延迟 6.2V 6.5V 500 1.2k 11 高放AGC 输出 7.8V 8V15012 PIF 系统接地端 00 0 013 自动频率微调输出 5.8V 6.6V 50014 自动频率微调输出 6.5V 6.5V 45015 全电视信号及SIF 输出3.2V 4V 600 150 16 AFT 移相网络 4V 4V 400 10k 17 PIF 调谐电路 7.5V 7.5V 400 125 18 PIF 调谐电路 7.5V 7.5V 400 125 19 AFT 移相网络 4V 4V 500 10k 20 电源正端 11V 11V 160 65 21 伴音中频输入4.8V 4.5V 1k 150 22 伴音中频鉴频线圈 4.5V 4.5V 250 1.5k 23 伴音去加重电路5.6V 6V 300 150 24 伴音中频鉴频线圈4.5V 4.6V 250 1.5k说明测量机型为海信SR5407采用MF10B 型万用表无线电杂志社制作。

UTC8227中文资料

UTC8227L I NEAR I NTEGRATED CI RCUI TLOW FREQUENCY POWER AMPLIFIERDESCRIPTIONThe UTC8227is the audio power amplifier with built-intwo channel developed for portable radio cassette tape recorder with power ON/OFF switch.FEATURES*Wide operating supply voltage:Vcc=5~12V *Low quiescent supply current(Icc=21mA,typical,at Vcc=9V ,Vi=0)*Output powerPo=2.50W/CH at Vcc=9V,R L =4ohm ,f=1kHz,Thd=10%*Soft Clip*Built-in Thermal shut-down protection circuit *Stand-by SwitchHDIP-12TEST CIRCUITUTC8227L I NEAR I NTEGRATED CI RCUI TABSOLUTE MAXIMUM RATINGS (Ta=25°C)CharacteristicSymbolValueUnitSupply Voltage Vcc 20V Output Current Io 2.5A Power Dissipation(note)Pd 4W Operating Temperature Topr -20~ +75°C Storage TemperatureTstg-55~+150°CNote:Value for mounting on PC boardELECTRICAL CHARACTERISTICS(Ta=25°C,Vcc=9V,RL=4Ω,Rg=600Ω,f=1kHz,unless otherwise specified)CharacteristicSymbolTest ConditionsMinTypMaxUnitsQuiescent current Icc Vi=02145mA THD=10%,RL=4Ω 2.02.5W Output Power Po THD=10%,RL=3Ω3.0WTotal Harmonic DistortionTHD Po=0.4W/CH0.21.0%Gv1R f =120Ω,Vout=0.775Vrms 434547dBVoltage Gain Gv2R f =0,Vout=0.775Vrms56.5Input Impedance Rin 30ΩOutput Noise Voltage Vno Rg=10k Ω,BW=20Hz~20kHz 0.3 1.0mVrms Ripple Rejection RatioR.R Rg=600Ω fripple=100Hz 52dB Cross Talk C.T Rg=600Ω,Vout=0,f=1kHz50dBInput Offset Voltage V7,83060mV Standby CurrentSw1:OFF 1µAUTC8227L I NEAR I NTEGRATED CI RCUI TTYPICAL PERFORMANCE CHARACTERISTICS3691215ICCQ,V2,V10vs.VCC1Q u i e s c e n t c u r r e n t (m A )THD vs Output PowerSupply Voltage ,Vcc2(V)020406080Q u i e s c e n t c u r r e n t (m A )Frequency (Hz)1010101010Frequency (Hz)1010101010Cross Talk vs.FrequencyAPPLICATION INFORMATION 1.Input VoltageWhen the excessive signal is input,turning-up is produced in the clip waveform.The turning-up point isVin=300mVrms(Typical)at Vcc=9V,RL=4Ω f=1kHz.Enough care must be taken for this phenomenon.2.Power ON/OFFThere is power ON/OFF switch at pin 1.However output power is changed by pin 1supply voltage whenpin1supply voltage is not same pin 12supply voltage,after referring to attached date,select pin 1supply voltage.3.Voltage GainThe voltage gain can be changed by the external negative feedback resistor.When Rf=0,the Gain is equalto 56.5dB.When Rf=120Ω the Gain is equal to 45dB.。

opa2227中文资料

典型性能曲线测试电路
典型性能曲线
At TA = +25 ° C, RL = 10k Ω , and VS = ±15V, unless otherwise noted.
典型性能曲线
偏置电流
• 输入偏置电流由OPA227内部大小相等，方向相反的cancellation电流补偿。
• 由此产生的输入偏置电流的区别是输入偏置电流和cancellation电流，可正可负。
106
135
130
+5
见典型曲线
±2
±100 ±5 ±50
1013 || 2 1013 || 5
单位
mV mV μV/°C dB dB dB
pA nA pA
Ω || pF Ω || pF
参数开环增益开环电压增益
输出电压输出
短路电流
供电 –40 °C to +85°C
OPA2134PA规格（3）
OPA228可用来替换OP - 37，LT1037，MAX437 • 单，双和四版
OPA2134PA管脚图
参数输入偏置电流 –40 °C to +85°C 输入电压范围
输入阻抗
OPA2134PA规格（1）
条件
MIN
TYP
MAX
单位
±2.5
±10
nA
VCM = (V–)+2V to (V+)–2V VCM = (V–)+2V to (V+)–2V
FIGURE 15. Long-Wavelength Infrared Detector Amplifier. FIGURE 16. High Performance Synchronous Demodulator

TA8225HQ中文资料

3
2006-04-28
元器件交易网
TA8225HQ/LQ
(1) In−phase and negative phase NF capacitor charging time In (Fig.2), when the power source is turned on, Q1 and Q2 are turned on, and NF capacitors are charged in the route of VCC→Q2→R→boot→CBS→out→R0→CNF. For instance, if the capacity of an in−phase capacitor is not properly paired with that a negative−phase capacitor, output offset voltage = pop noise is produced because a charging time of NF capacitor differs between the in−phase and negative−phase outputs. Therefore, to suppress the pop noise it is necessary to properly pair the in−phase and negative−phase NF capacitors. Output and NF DC voltage waveforms by the pairing of NF capacitors: CNF are shown in (Fig.3) and (Fig.4). Further, voltage waveforms are shown when the power source was turned on, under the following conditions:

TA8207K中文资料

7. GND line GND pin is not separated for pre-GND and for PW-GND. That is liable to cause distortion and cross talk worse. Before use this IC, please check it.
Rf + R1 + R2 Rf + R1
When Rf = 0Ω GV = 56.5dB (typ.) When Rf = 120Ω GV = 45dB (typ.)
TA8207K
By increasing Rf, reduction of GV is possible. However, since the feedback increase is liable to produce oscillation, it is recommended to use this at 40dB or over.
(*2): The condenser between the (3) pin and the GND (C11) is for reducing pop noise when the power on / off switch (SW1) is set to on / off.
3
2002-10-30
4
2002-10-30
TA8207K
5. Power on / off switch There is power on / off switch at (3) pin. However, output power is changed by (3) pin supply voltage when (3) pin supply voltage is not same (12) pin supply voltage, after referring to attached date, select (3) pin supply voltage.

TA8227资料.pdf

典型应用:
学无止境
TA8227 替换型号有： YD8227 UTC8227 AD8227 STV8227
第一价值网为您提供最优惠的价格,保证最好的品质!~ 出处:第TA8227 中文资料,引脚图,价格描述 TA8227 双声道 2.5W 带 STBY 音频功率放大电路产品介绍: 1.工作电源电压范围为 5～12V 2.其输出功率大： Po=2.5W×2 (Vcc=9V ，RL=4Ω， f=1kHz，THD=10%) 3.具有外接元件少，声道分离度高，爆破噪声少，电压增益可由外接电阻调节等特点 4.内含工作/待机开关采用带散热片的双列直插 12 脚塑料封装 HDIP12 特点 * 工作电压范围:Vcc = 5 ~ 12 伏 * 低静态电流 (Icc=21mA,typical,at Vcc=9V ,Vi=0) * 输出功率 Po=2.50W/CH at Vcc=9V,RL=4ohm ,f=1kHz,Thd=10% * 内部热关机保护电路 * 备用开关测试电路:

TA7698AP

TA7698APTA7698AP 是东芝公司生产的视频色度行场扫描处理集成电路与TA7680AP 相组合构成东芝两片机芯集成电路内部含有PAL/NTSC 制彩色解码色差信号处理亮度信号处理对比度控制行振荡行AFC 场振荡场推动同步分离等电路海信电器股份有限公司在精品系列的产品中使用了TA7698AP 集成电路其主要机型有SR4715SR5407SR5416SR5427SR5446TC2138等直流电压(V) 对地电阻() 引脚序号功能动态静态红笔接地黑笔接地1 对比度放大器射极输出 5.7 4 300 190 2电源色度部分 11 11 160 90 3黑电平钳位输入端 4 3.8 400 170 4亮度控制端 3.8 3.8 400 170 5色度输入端 1 1 260 190 6 ACC 滤波端 8.4 8 450 190 7色饱和度控制端 5.7 1.8 300 190 8色度信号输出端 9 9.2 400 180 9色相位控制端 5 5.5 400 200 10色同步脉冲净化端 6.8 7 400 160 11亮度和色度部分接地 0 0 0 0 12消色识别滤波器 8.5 6 300 150 13 晶振驱动端 8.8 8.5 450 59014 -45移相输入 3.2 3.2 300 15015 0副载波输入 3.2 3.2 300 15016 APC 滤波端 7.8 9 2.5k 170 17 直通色度信号输入 3.8 3.8 450 16018 APC 滤波端 7.8 9 2.5k 170 19 延迟色度信号输入 3.8 3.8 300 16520 G-Y 解调输出 6.8 9 400 16021 R-Y 解调输出 6.8 7.8 350 16022 B-Y 解调输出 6.8 7.8 300 16023 Y 信号输出端 6.6 7.8 400 13024 场推动输出端 0.6 0.5 250 16025 场幅调节端 4.4 4.8 300 15026 场负反馈输入端 7.4 7.2 2.5k 160 27 场锯齿波形成 7.4 7.2 400 13528 场同步信号输入 0.3 0.2 350 30029 场频调节 2.5 2.4 350 16530 X 射线保护输入0 0 0 031 扫描部分接地0 0 0 01201700.432 行扫描信号输出 0.4533 Vcc2行扫描电源8.2 8.2 45034 行同步AFC输入 4.8 4.8 7508.5k35 AFC输出 4.94.55.5k350336 同步输出选通 355k25037 同步分离输入 -0.17k3500.438 逆程脉冲输入 0.5639 全电视信号输入 1.3 3.2 200 8k40 视频信号输出7.8 6.8 450 2.4k41 对比度控制端 6.8 6.6 400 4.6k42 复合视频信号输出8.4 8.4 450 1k说明测量机型为海信SR5407采用MF10B型万用表。

ch7217a中文规格书

ch7217a中文规格书ch7217a中文规格书是一个关于某种设备或产品详细参数和功能描述的文件。

它通常用于在产品开发和生产过程中，确保各个团队和厂商理解和遵守相同的要求和标准。

下面是一个关于ch7217a中文规格书的参考内容：1. 产品描述：ch7217a是一款数字信号处理器，可以实现高性能音频处理功能。

它具有8个输入通道和8个输出通道，支持多种音频输入和输出格式。

2. 技术规格：- 输入和输出通道：8个- 输入和输出格式：PCM、I2S、SPDIF等- 采样率：支持最高192kHz采样率- 位深度：支持最高24位- 主频：可配置，最高达1GHz- 存储容量：内置128MB Flash和64MB RAM3. 功能特点：- 高性能处理能力：采用先进的数字信号处理算法，实现高清晰度音频处理，包括混响、均衡器、降噪等功能。

- 多通道输入输出：支持最多8个通道的音频输入和输出，满足多声道音频处理的需求。

- 低功耗设计：采用先进的低功耗技术和智能节能策略，降低产品能耗，延长续航时间。

- 灵活的配置选项：提供多种配置选项，可根据不同需求进行灵活配置，满足不同客户的需求。

- 易于集成：提供适用于不同操作系统的驱动程序和软件开发包，方便产品集成和开发。

4. 应用领域：- 智能音箱：ch7217a可以作为智能音箱的音频处理芯片，实现高保真音效和多通道音频处理功能。

- 录音设备：ch7217a可以用于专业录音设备，提供高品质录音和音频处理能力。

- 多媒体播放器：ch7217a可以用于多媒体播放器，增强音频输出效果。

- 音频处理设备：ch7217a还可以作为专业音频处理设备的核心芯片，提供高性能音频处理功能。

5. 质量标准和认证：- 符合ISO 9001质量管理体系标准；- 符合相关CE、FCC等认证要求。

综上所述，ch7217a中文规格书详细描述了该产品的技术规格、功能特点、应用领域和质量标准。

这些规格对于产品研发、生产和销售具有指导作用，可以确保产品符合客户需求、达到预期性能，并满足相关认证要求。

一种功率放大电路和功率放大芯片[实用新型专利]

专利名称：一种功率放大电路和功率放大芯片专利类型：实用新型专利
发明人：彭雄辉
申请号：CN202020426926.8
申请日：20200327
公开号：CN211531282U
公开日：
20200918
专利内容由知识产权出版社提供
摘要：本申请实施例公开了一种功率放大电路，该功率放大电路包括：电感、功率放大芯片以及电容滤波模块；其中，电感的一端与电源电压连接，电感的另一端与功率放大芯片的输入端连接；电容滤波模块包括第一滤波模块，第一滤波模块的一端与功率放大芯片的输出端连接，第一滤波模块的另一端与扬声器连接；本申请实施例同时还公开了一种功率放大芯片。

申请人：OPPO广东移动通信有限公司
地址：523860 广东省东莞市长安镇乌沙海滨路18号
国籍：CN
代理机构：北京派特恩知识产权代理有限公司
更多信息请下载全文后查看。

TA8227资料.doc

TA8227 中文资料,引脚图,价格
描述
TA8227双声道2.5W带STBY音频功率放大电路产品介绍:
1.工作电源电压范围为5～12V
2.其输出功率大：Po=2.5W×2 (Vcc=9V，RL=4Ω，
f=1kHz，THD=10%)
3.具有外接元件少，声道分离度高，爆破噪声少，电压增
益可由外接电阻调节等特点
4.内含工作/待机开关采用带散热片的双列直插12脚塑
料封装HDIP12
特点
* 工作电压范围:Vcc = 5 ~ 12伏
* 低静态电流(Icc=21mA,typical,at Vcc=9V ,Vi=0)
* 输出功率Po=2.50W/CH at Vcc=9V,RL=4ohm ,f=1kHz,Thd=10% * 内部热关机保护电路
* 备用开关
测试电路:
典型应用:
TA8227替换型号有：
YD8227
UTC8227
AD8227
STV8227
第一价值网为您提供最优惠的价格,保证最好的品质!~ 出处:第一价值网(IC网络超市) 转载请注明出处~!。

精品课件-电视原理与电视机检修(庄月-第2章

第 2 章电视接收机原理与电路分析
像。
视放与显像管的作用是将三基色电压信号还原成彩色图
扫描电路的作用是产生幅度足够、线性良好、与发送端 (电视台)同步的锯齿波电流并供给偏转线圈, 再由偏转线圈产生有规律变化的磁场去控制电子束偏转；产生彩色显像管的供电电源、消隐脉冲等。
电源电路的作用是为整机提供效率高、功耗小、稳压范围宽的直流电压。
第 2 章电视接收机原理与电路分析
Ri＝ 2RL 150
300
Ri＝ 2RL 150
1 2
A 1 2
3
2RL
4
150
B
3
2RL
150
4
(a)
300
1
3
2
4
RL 1 3
2 4
2 1 2 1
75
8 mm 11 mm
2 mm
300
4 3 3 4
(b)
(c)
图 2-3-6 匹配器的变换原理、
(a) 原理； (b) 结构； (c) 外形
入方式(这样便于屏蔽), 输入阻抗为75Ω。这样, 天线与高频头之间必须进行阻抗匹配和传输方式匹配。例如, 折合振子天线和高频头之间必须进行阻抗匹配和传输方式匹配, 如图2-3-5 所示。
第 2 章电视接收机原理与电路分析
折合振子天线
300 不平衡式
扁平馈线
300 平衡式
匹配器
同轴电缆
75 不平衡式
室外天线多数采用由折合振子和反射器、引向器组成的多单元天线, 又称为八木天线, 如图2-3-3所示。
第 2 章电视接收机原理与电路分析
(a)
图 2-3-2 室内天线
200

东芝TA8276HQ 功放音效芯片技术资料资料精

Note3: Some of the functional blocks, circuits, or constants in the block diagram may be omitted or simplified for explanatory purpose.
2
2004-05-10
Caution and Application Method
Figure 2 With pin 4 set to High, Power is turned ON
(1) Since VCC can directly be controlled to ON or OFF by the microcomputer, the switching relay can be omitted.
<Recommended Application>
I (100 µA) IMUTE (OFF) 22
C4
R1
A
IMUTE VMUTE
ATT – VMUTE
20
10 kΩ
5 kΩ
0
−20
−40
Mute attenuation ATT (dB)
ON Power 10 kΩ 4
OFF
Control Voltage of pin 4: VSB
VCC
≈ 2VBE to BIAS CUTTING CIRCUIT
Stand-by ON OFF
Power OFF ON
VSB (V) 0~1.5 3~VCC
Adjustage of Stand-by SW
(Description is made only on the single channel.)