LM2776 开关电容反相器
1 特性
- 输入电压：2.7V 至 5.5V
- 200mA 输出电流
- 将输入电源电压反相
- 低电流脉频调制 (PFM) 模式操作
- 2MHz 开关频率
- 效率高达 90% 以上
- 限流和热保护
- 无电感
2 应用
- 运算放大器电源
- 接口电源
- 数据转换器电源
- 音频放大器电源
- 便携式电子设备
3 说明
LM2776 CMOS 电荷泵电压转换器可将 2.7V 至 5.5V 范围内的正电压反相，从而获得对应的等值负电压。LM2776 采用三个低成本的电容即可提供 200mA 的输出电流，相比基于电感的转换器，解决了成本、尺寸和电磁干扰 (EMI) 多方面问题。
在大多数负载条件下，LM2776 的工作电流仅为 100μA，而工作效率高达 90% 以上，这对于需要高功率负电源的电池供电类系统而言堪称理想性能。
LM2776 一直以来始终采用 TI 的 6 引脚小外形尺寸晶体管 (SOT)-23 封装以保持小巧外形。
器件信息(1)
| 器件型号 | 封装 | 封装尺寸（标称值） |
|---|---|---|
| LM2776 | SOT-23 (6) | 2.90mm x 1.60mm |
- 要了解所有可用封装，请见数据表末尾的可订购产品附录。
空格
空白
空白
典型应用
输出阻抗与输入电压间的关系 (
IOUT = 100mA)
5 Pin Configuration and Functions
Pin Functions
| PIN | TYPE | DESCRIPTION | ||
|---|---|---|---|---|
| NUMBER | NAME | |||
| 1 | VOUT | Output/Power | Negative voltage output. | |
| 2 | GND | Ground | Power supply ground input. | |
| 3 | VIN | Input/Power | Power supply positive voltage input. | |
| 4 | EN | Input | Enable control pin, tie this pin high (EN = 1) for normal operation, and to GND (EN = 0) for shutdown. | |
| 5 | C1+ | Power | Connect this pin to the positive terminal of the charge-pump capacitor. | |
| 6 | C1- | Power | Connect this pin to the negative terminal of the charge-pump capacitor. | |
6 Specifications
6.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)(1)(2)| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| Supply voltage (VIN to GND, or GND to VOUT) | 6 | V | ||
| EN | (GND − 0.3) | (VIN + 0.3) | V | |
| VOUT continuous output current | 250 | mA | ||
| Operating junction temperature, TJMax(3) | 125 | °C | ||
| Storage temperature, Tstg | –65 | 150 | °C | |
6.2 ESD Ratings
| VALUE | UNIT | |||
|---|---|---|---|---|
| V(ESD) | Electrostatic discharge | Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) | ±1000 | V |
| Charged-device model (CDM), per JEDEC specification JESD22-C101(2) | ±250 | V | ||
6.3 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)| MIN | NOM | MAX | UNIT | ||
|---|---|---|---|---|---|
| Junction temperature | –40 | 125 | °C | ||
| Ambient temperature | –40 | 85 | °C | ||
| Input voltage | 2.7 | 5.5 | V | ||
| Output current | 0 | 200 | mA | ||
6.4 Thermal Information
| THERMAL METRIC(1) | LM2776 | UNIT | |
|---|---|---|---|
| DBV (SOT) | |||
| 6 PINS | |||
| RθJA | Junction-to-ambient thermal resistance | 187 | °C/W |
| RθJC(top) | Junction-to-case (top) thermal resistance | 158.2 | °C/W |
| RθJB | Junction-to-board thermal resistance | 33.3 | °C/W |
| ψJT | Junction-to-top characterization parameter | 37.8 | °C/W |
| ψJB | Junction-to-board characterization parameter | 32.8 | °C/W |
6.5 Electrical Characteristics
Typical limits tested at TA = 25°C. Minimum and maximum limits apply over the full operating ambient temperature range (−40°C ≤ TA ≤ +85°C). VIN = 3.6 V, CIN = COUT = 2.2 µF, C1 = 1 µF| PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
|---|---|---|---|---|---|---|
| IQ | Supply current | EN = 1. No load | 100 | 200 | µA | |
| ISD | Shutdown supply current | EN = 0 | 0.1 | 1 | µA | |
| VEN | Enable pin input threshold voltage | Normal operation | 1.2 | V | ||
| Shutdown mode | 0.4 | |||||
| ROUT | Output resistance | 2.5 | Ω | |||
| ICL | Output current limit | 400 | mA | |||
| UVLO | Undervoltage lockout | VIN Falling | 2.4 | V | ||
| VIN Rising | 2.6 | |||||
6.6 Switching Characteristics
over operating free-air temperature range (unless otherwise noted)| PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
|---|---|---|---|---|---|---|
| ƒSW | Switching frequency | 1.7 | 2 | 2.3 | MHz | |
6.7 Typical Characteristics
(典型应用 circuit, VIN = 3.6 V unless otherwise specified.)
| VIN = 5.5 V |
| IOUT = 100 mA |
| VIN = 5.5 V |
| VIN = 3.6 V |
| VIN = 3.6 V |
| IOUT = 0 mA | VIN = 5.5 V |
| EN = 1 | VIN = 5.5 V | IOUT = 100 mA |
| IOUT = 75 mA |
| VIN = 5.5 V |
| No load |
| VIN = 5.5 V |
| VIN = 5.5 V |
| IOUT = 150 mA |
| IOUT = 200 mA | VIN = 5.5 V |
| EN = 0 | VIN = 5.5 V | IOUT = 100 mA |
| VIN = 5.5 V |
7 Detailed Description
7.1 Overview
The LM2776 CMOS charge-pump voltage converter inverts a positive voltage in the range of 2.7 V to 5.5 V to the corresponding negative voltage of −2.7 V to −5.5 V. The LM2776 uses three low-cost capacitors to provide up to 200 mA of output current.
7.2 Functional Block Diagram
7.3 Feature Description
7.3.1 Input Current Limit
The LM2776 contains current limit circuitry that protects the device in the event of excessive input current and/or output shorts to ground. The input current is limited to 400 mA (typical at VIN = 5.5 V) when the output is shorted directly to ground. When the LM2776 is current limiting, power dissipation in the device is likely to be quite high. In this event, thermal cycling is expected.
7.3.2 PFM Operation
To minimize quiescent current during light load operation, the LM2776 allows PFM or pulse-skipping operation. By allowing the charge pump to switch less when the output current is less than 40 mA, the quiescent current drawn from the power source is minimized. The frequency of pulsed operation is not limited and can drop into the sub-1-kHz range when unloaded. As the load increases, the frequency of pulsing increases until it transitions to constant frequency. The fundamental switching frequency of the LM2776 is 2 MHz.
7.3.3 Output Discharge
In shutdown, the LM2776 actively pulls down on the output of the device until the output voltage reaches GND. In this mode, the current drawn from the output is approximately 1.85 mA.
7.3.4 Thermal Shutdown
The LM2776 implements a thermal shutdown mechanism to protect the device from damage due to overheating. When the junction temperature rises to 150°C (typical), the part switches into shutdown mode. The LM2776 releases thermal shutdown when the junction temperature of the part is reduced to 130°C (typical).
Thermal shutdown is most often triggered by self-heating, which occurs when there is excessive power dissipation in the device and/or insufficient thermal dissipation. LM2776 power dissipation increases with increased output current and input voltage. When self-heating brings on thermal shutdown, thermal cycling is the typical result. Thermal cycling is the repeating process where the part self-heats, enters thermal shutdown (where internal power dissipation is practically zero), cools, turns on, and then heats up again to the thermal shutdown threshold. Thermal cycling is recognized by a pulsing output voltage and can be stopped be reducing the internal power dissipation (reduce input voltage and/or output current) or the ambient temperature. If thermal cycling occurs under desired operating conditions, thermal dissipation performance must be improved to accommodate the power dissipation of the LM2776.
7.3.5 Undervoltage Lockout
The LM2776 has an internal comparator that monitors the voltage at VIN and forces the device into shutdown if the input voltage drops to 2.4 V. If the input voltage rises above 2.6 V, the LM2776 resumes normal operation.
7.4 Device Functional Modes
7.4.1 Shutdown Mode
An enable pin (EN) pin is available to disable the device and place the LM2776 into shutdown mode reducing the quiescent current to 1 µA. In shutdown, the output of the LM2776 is pulled to ground by an internal pullup current source (approx 1.85 mA).
7.4.2 Enable Mode
Applying a voltage greater than 1.2 V to the EN pin places the device into enable mode. When unloaded, the input current during operation is 120 µA. As the load current increases, so does the quiescent current. When enabled, the output voltage is equal to the inverse of the input voltage minus the voltage drop across the charge pump.
8 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.
8.1 Application Information
The LM2776 CMOS charge-pump voltage converter inverts a positive voltage in the range of 2.7 V to 5.5 V to the corresponding negative voltage of −2.7 V to −5.5 V. The device uses three low-cost capacitors to provide up to 200 mA of output current. The LM2776 operates at 2-MHz oscillator frequency to reduce output resistance and voltage ripple under heavy loads. With an operating current of only 100 µA (operating efficiency greater than 91% with most loads) and 1-µA typical shutdown current, the LM2776 provides ideal performance for battery-powered systems.
8.2 Typical Application - Voltage Inverter
Figure 18. Voltage Inverter
8.2.1 Design Requirements
Example requirements for typical voltage inverter applications:
| DESIGN PARAMETER | EXAMPLE VALUE |
|---|---|
| Input voltage range | 2.7 V to 5.5 V |
| Output current | 0 mA to 200 mA |
| Boost switching frequency | 2 MHz |
8.2.2 Detailed Design Requirements
The main application of LM2776 is to generate a negative supply voltage. The voltage inverter circuit uses only three external capacitors with an range of the input supply voltage from 2.7 V to 5.5 V.
The LM2776 contains four large CMOS switches which are switched in a sequence to invert the input supply voltage. Energy transfer and storage are provided by external capacitors. Figure 19 shows the voltage conversion scheme. When S1 and S3 are closed, C1 charges to the supply voltage VIN. During this time interval, switches S2 and S4 are open. In the second time interval, S1 and S3 are open; at the same time, S2 and S4 are closed, C1 is charging C2. After a number of cycles, the voltage across C2 is pumped to VIN. Because the anode of C2 is connected to ground, the output at the cathode of C2 equals −(VIN) when there is no load current. The output voltage drop when a load is added is determined by the parasitic resistance (Rds(on) of the MOSFET switches and the equivalent series resistance (ESR) of the capacitors) and the charge transfer loss between capacitors.
Figure 19. Voltage Inverting Principle
The output characteristics of this circuit can be approximated by an ideal voltage source in series with a resistance. The voltage source equals − (VIN). The output resistance ROUT is a function of the ON resistance of the internal MOSFET switches, the oscillator frequency, the capacitance and ESR of C1 and C2. Because the switching current charging and discharging C1 is approximately twice as the output current, the effect of the ESR of the pumping capacitor C1 is multiplied by four in the output resistance. The output capacitor C2 is charging and discharging at a current approximately equal to the output current, therefore, its ESR only counts once in the output resistance. A good approximation of ROUT is:
where
- RSW is the sum of the ON resistance of the internal MOSFET switches shown in Figure 19.
High-capacitance, low-ESR ceramic capacitors reduce the output resistance.
8.2.2.1 Efficiency
Charge-pump efficiency is defined as
where
- IQ (VIN) is the quiescent power loss of the device.
8.2.2.2 Power Dissipation
LM2776 power dissipation (PD) is calculated simply by subtracting output power from input power:
Power dissipation increases with increased input voltage and output current. Internal power dissipation self-heats the device. Dissipating this amount power/heat so the LM2776 does not overheat is a demanding thermal requirement for a small surface-mount package. When soldered to a PCB with layout conducive to power dissipation, the thermal properties of the SOT package enable this power to be dissipated from the LM2776 with little or no derating, even when the circuit is placed in elevated ambient temperatures when the output current is 200 mA or less.
8.2.2.3 Capacitor Selection
The LM2776 requires 3 external capacitors for proper operation. TI recommends urface-mount multi-layer ceramic capacitors. These capacitors are small, inexpensive, and have very low ESR (≤ 15 mΩ typical). Tantalum capacitors, OS-CON capacitors, and aluminum electrolytic capacitors generally are not recommended for use with the LM2776 due to their high ESR, as compared to ceramic capacitors.
For most applications, ceramic capacitors with an X7R or X5R temperature characteristic are preferred for use with the LM2776. These capacitors have tight capacitance tolerance (as good as ±10%) and hold their value over temperature (X7R: ±15% over –55ºC to 125°C; X5R: ±15% over –55°C to 85°C).
Capacitors with a Y5V or Z5U temperature characteristic are generally not recommended for use with the LM2776. These types of capacitors typically have wide capacitance tolerance (80%, …20%) and vary significantly over temperature (Y5V: 22%, –82% over –30°C to 85°C range; Z5U: 22%, –56% over 10°C to 85°C range). Under some conditions, a 1-µF-rated Y5V or Z5U capacitor could have a capacitance as low as 0.1 µF. Such detrimental deviation is likely to cause Y5V and Z5U capacitors to fail to meet the minimum capacitance requirements of the LM2776.
Net capacitance of a ceramic capacitor decreases with increased DC bias. This degradation can result in lower capacitance than expected on the input and/or output, resulting in higher ripple voltages and currents. Using capacitors at DC bias voltages significantly below the capacitor voltage rating usually minimizes DC bias effects. Consult capacitor manufacturers for information on capacitor DC bias characteristics.
Capacitance characteristics can vary quite dramatically with different application conditions, capacitor types, and capacitor manufacturers. It is strongly recommended that the LM2776 circuit be thoroughly evaluated early in the design-in process with the mass-production capacitors of choice. This helps ensure that any such variability in capacitance does not negatively impact circuit performance.
The voltage rating of the output capacitor must be 10 V or more. For example, a 10-V 0603 1-µF is acceptable for use with the LM2776, as long as the capacitance does not fall below a minimum of 0.5 µF in the intended application. All other capacitors must have a voltage rating at or above the maximum input voltage of the application. Select the capacitors such that the capacitance on the input does not fall below 0.7 µF, and the capacitance of the flying capacitor does not fall below 0.2 µF.
8.2.2.4 Output Capacitor and Output Voltage Ripple
The peak-to-peak output voltage ripple is determined by the oscillator frequency, the capacitance and ESR of the output capacitor COUT:
In typical applications, a 1-µF low-ESR ceramic output capacitor is recommended. Different output capacitance values can be used to reduce ripple shrink the solution size, and/or cut the cost of the solution. But changing the output capacitor may also require changing the flying capacitor and/or input capacitor to maintain good overall circuit performance.
NOTE
In high-current applications, TI recommends a 10-µF, 10-V low-ESR ceramic output capacitor. If a small output capacitor is used, the output ripple can become large during the transition between PFM mode and constant switching. To prevent toggling, a 2-µF capacitance is recommended. For example, a 10- µF, 10-V output capacitor in a 0402 case size typically only has 2-µF capacitance when biased to 5 V.
High ESR in the output capacitor increases output voltage ripple. If a ceramic capacitor is used at the output, this is usually not a concern because the ESR of a ceramic capacitor is typically very low and has only a minimal impact on ripple magnitudes. If a different capacitor type with higher ESR is used (tantalum, for example), the ESR could result in high ripple. To eliminate this effect, the net output ESR can be significantly reduced by placing a low-ESR ceramic capacitor in parallel with the primary output capacitor. The low ESR of the ceramic capacitor is in parallel with the higher ESR, resulting in a low net ESR based on the principles of parallel resistance reduction.
8.2.2.5 Input Capacitor
The input capacitor (CIN) is a reservoir of charge that aids a quick transfer of charge from the supply to the flying capacitors during the charge phase of operation. The input capacitor helps to keep the input voltage from drooping at the start of the charge phase when the flying capacitors are connected to the input. It also filters noise on the input pin, keeping this noise out of sensitive internal analog circuitry that is biased off the input line.
Much like the relationship between the output capacitance and output voltage ripple, input capacitance has a dominant and first-order effect on input ripple magnitude. Increasing (decreasing) the input capacitance results in a proportional decrease (increase) in input voltage ripple. Input voltage, output current, and flying capacitance also affects input ripple levels to some degree.
In typical applications, a 1-µF low-ESR ceramic capacitor is recommended on the input. When operating near the maximum load of 200 mA, a minimum recommended input capacitance after taking into the DC-bias derating is 2 µF or larger. Different input capacitance values can be used to reduce ripple, shrink the solution size, and/or cut the cost of the solution.
8.2.2.6 Flying Capacitor
The flying capacitor (C1) transfers charge from the input to the output. Flying capacitance can impact both output current capability and ripple magnitudes. If flying capacitance is too small, the LM2776 may not be able to regulate the output voltage when load currents are high. On the other hand, if the flying capacitance is too large, the flying capacitor might overwhelm the input and output capacitors, resulting in increased input and output ripple.
In typical high-current applications, TI recommends 0.47-µF or 1-µF 10 V low-ESR ceramic capacitors for the flying capacitors. Polarized capacitors (tantalum, aluminum electrolytic, etc.) must not be used for the flying capacitor, as they could become reverse-biased during LM2776 operation.
8.2.3 Application Curve
Figure 20. Output Impedance vs Input Voltage
9 Power Supply Recommendations
10 Layout
10.1 Layout Guidelines
The high switching frequency and large switching currents of the LM2776 make the choice of layout important. Use the following steps as a reference to ensure the device is stable and maintains proper LED current regulation across its intended operating voltage and current range:
- Place CIN on the top layer (same layer as the LM2776) and as close to the device as possible. Connecting the input capacitor through short, wide traces to both the VIN and GND pins reduces the inductive voltage spikes that occur during switching which can corrupt the VIN line.
- Place COUT on the top layer (same layer as the LM2776) and as close to the VOUT and GND pins as possible. The returns for both CIN and COUT must come together at one point, as close to the GND pin as possible. Connecting COUT through short, wide traces reduce the series inductance on the VOUT and GND pins that can corrupt the VOUT and GND lines and cause excessive noise in the device and surrounding circuitry.
- Place C1 on the top layer (same layer as the LM2776) and as close to the device as possible. Connect the flying capacitor through short, wide traces to both the C1+ and C1– pins.
10.2 Layout Example
Figure 21. LM2776 Layout Example
11 器件和文档支持
11.1 器件支持
11.1.1 Third-Party Products Disclaimer
TI'S PUBLICATION OF INFORMATION REGARDING THIRD-PARTY PRODUCTS OR SERVICES DOES NOT CONSTITUTE AN ENDORSEMENT REGARDING THE SUITABILITY OF SUCH PRODUCTS OR SERVICES OR A WARRANTY, REPRESENTATION OR ENDORSEMENT OF SUCH PRODUCTS OR SERVICES, EITHER ALONE OR IN COMBINATION WITH ANY TI PRODUCT OR SERVICE.
11.2 接收文档更新通知
要接收文档更新通知，请导航至德州仪器 TI.com.cn 上的器件产品文件夹。请单击右上角的通知我 进行注册，即可收到任意产品信息更改每周摘要。有关更改的详细信息，请查看任意已修订文档中包含的修订历史记录。
11.3 社区资源
下列链接提供到 TI 社区资源的连接。链接的内容由各个分销商“按照原样”提供。这些内容并不构成 TI 技术规范，并且不一定反映 TI 的观点；请参阅 TI 的 《使用条款》。
-
TI E2E™ 在线社区 TI 的工程师对工程师 (E2E) 社区。此社区的创建目的在于促进工程师之间的协作。在 e2e.ti.com 中，您可以咨询问题、分享知识、拓展思路并与同行工程师一道帮助解决问题。
-
设计支持 TI 参考设计支持 可帮助您快速查找有帮助的 E2E 论坛、设计支持工具以及技术支持的联系信息。
11.4 商标
E2E is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
11.5 静电放电警告
这些装置包含有限的内置 ESD 保护。 存储或装卸时，应将导线一起截短或将装置放置于导电泡棉中，以防止 MOS 门极遭受静电损伤。
11.6 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.
12 机械、封装和可订购信息
以下页面包括机械、封装和可订购信息。这些信息是指定器件的最新可用数据。这些数据发生变化时，我们可能不会另行通知或修订此文档。如欲获取此产品说明书的浏览器版本，请参阅左侧的导航栏。
重要声明
德州仪器(TI) 及其下属子公司有权根据 JESD46 最新标准, 对所提供的产品和服务进行更正、修改、增强、改进或其它更改， 并有权根据 JESD48最新标准中止提供任何产品和服务。客户在下订单前应获取最新的相关信息, 并验证这些信息是否完整且是最新的。所有产品的销售都遵循在订单确认时所提供的TI 销售条款与条件。
TI 保证其所销售的组件的性能符合产品销售时 TI 半导体产品销售条件与条款的适用规范。仅在 TI 保证的范围内，且 TI 认为有必要时才会使用测试或其它质量控制技术。除非适用法律做出了硬性规定，否则没有必要对每种组件的所有参数进行测试。
TI 对应用帮助或客户产品设计不承担任何义务。客户应对其使用 TI 组件的产品和应用自行负责。为尽量减小与客户产品和应用相关的风险，客户应提供充分的设计与操作安全措施。
TI 不对任何 TI 专利权、版权、屏蔽作品权或其它与使用了 TI 组件或服务的组合设备、机器或流程相关的 TI 知识产权中授予 的直接或隐含权限作出任何保证或解释。TI所发布的与第三方产品或服务有关的信息，不能构成从 TI 获得使用这些产品或服 务的许可、授权、或认可。使用此类信息可能需要获得第三方的专利权或其它知识产权方面的许可，或是 TI 的专利权或其它知识产权方面的许可。
对于 TI 的产品手册或数据表中 TI 信息的重要部分，仅在没有对内容进行任何篡改且带有相关授权、条件、限制和声明的情况 下才允许进行复制。TI 对此类篡改过的文件不承担任何责任或义务。复制第三方的信息可能需要服从额外的限制条件。
在转售 TI 组件或服务时，如果对该组件或服务参数的陈述与 TI 标明的参数相比存在差异或虚假成分，则会失去相关 TI 组件或服务的所有明示或暗示授权，且这是不正当的、欺诈性商业行为。TI 对任何此类虚假陈述均不承担任何责任或义务。
客户认可并同意，尽管任何应用相关信息或支持仍可能由 TI 提供，但他们将独力负责满足与其产品及在其应用中使用 TI 产品相关的所有法律、法规和安全相关要求。客户声明并同意，他们具备制定与实施安全措施所需的全部专业技术和知识，可预见故障的危险后果、监测故障及其后果、降低有可能造成人身伤害的故障的发生机率并采取适当的补救措施。客户将全额赔偿因 在此类安全关键应用中使用任何 TI 组件而对 TI及其代理造成的任何损失。
在某些场合中，为了推进安全相关应用有可能对 TI 组件进行特别的促销。TI 的目标是利用此类组件帮助客户设计和创立其特有的可满足适用的功能安全性标准和要求的终端产品解决方案。尽管如此，此类组件仍然服从这些条款。
TI 组件未获得用于 FDA Class III（或类似的生命攸关医疗设备）的授权许可，除非各方授权官员已经达成了专门管控此类使 用的特别协议。
只有那些 TI 特别注明属于军用等级或“增强型塑料”的 TI 组件才是设计或专门用于军事/航空应用或环境的。购买者认可并同 意，对并非指定面向军事或航空航天用途的 TI组件进行军事或航空航天方面的应用，其风险由客户单独承担，并且由客户独 力负责满足与此类使用相关的所有法律和法规要求。
TI 已明确指定符合 ISO/TS16949 要求的产品，这些产品主要用于汽车。在任何情况下，因使用非指定产品而无法达到 ISO/TS16949要求，TI不承担任何责任。
产品
- 数字音频: www.ti.com.cn/audio
- 放大器和线性器件: www.ti.com.cn/amplifiers
- 数据转换器: www.ti.com.cn/dataconverters
- DLP® 产品: www.dlp.com
- DSP - 数字信号处理器: www.ti.com.cn/dsp
- 时钟和计时器: www.ti.com.cn/clockandtimers
- 接口: www.ti.com.cn/interface
- 逻辑: www.ti.com.cn/logic
- 电源管理: www.ti.com.cn/power
- 微控制器 (MCU): www.ti.com.cn/microcontrollers
- RFID 系统: www.ti.com.cn/rfidsys
- OMAP应用处理器: www.ti.com/omap
- 无线连通性: www.ti.com.cn/wirelessconnectivity
应用
- 通信与电信: www.ti.com.cn/telecom
- 计算机及周边: www.ti.com.cn/computer
- 消费电子: www.ti.com/consumer-apps
- 能源: www.ti.com/energy
- 工业应用: www.ti.com.cn/industrial
- 医疗电子: www.ti.com.cn/medical
- 安防应用: www.ti.com.cn/security
- 汽车电子: www.ti.com.cn/automotive
- 视频和影像: www.ti.com.cn/video
德州仪器在线技术支持社区: www.deyisupport.com
邮寄地址： 上海市浦东新区世纪大道1568 号，中建大厦32 楼邮政编码： 200122
Copyright© 2016, 德州仪器半导体技术（上海）有限公司
