Powermanagement /电源管理

Presentation on theme: "Powermanagement /电源管理"— Presentation transcript:

1 Powermanagement /电源管理
Edward Ku Phone: Phone: a leap ahead in Standard Linear

2 电源管理的投资组合 音频和电源管理 Audio Management LDO Audio Amp ADC DAC 电荷泵 背光灯 充电器
DCDC Audio Amp ADC DAC 电荷泵 背光灯 充电器 触摸屏 RTC 监管 ANC Equalizer 微型电源管理单元 Austriamicrosystems power management product portfolio. Micro Power Management Unit (PMU) consists of several integrated DCDCs and LDOs. Power Mangement Units contains a lot more functionality including Chargers, Backlight, RTCs, Supervisory,… Audio Management contains Audio ADCs & DACs, Active noise cancelling, Audio Amps. Audio and Power Management is the complete system. 电源管理

3 高性能聚集 超低能量功耗 最低噪声 高级的性能 焦点
Austriamicrosystems power management products focus on three points: Low power consumption, which is reflected in very good efficiencies, low quiescent currents, power save modes, low operating currents and low shut down currents. This alltogether benefits the customer in terms of long battery life time, engergy efficiency and significantly reduced heat dissipation. Low Noise: the power management products are optimzed to achieve high performance also in terms of low noise performance (as high PSRR, line and load regulation, low introduced noise) This enables the customer to get best performing supply for RF modules, sensors, analog amplifiers, ADCs and measurement equipment. Advanced Features: our power management solutions provide additional functionality as low battery detection, power ok signalling, battery feedthrough, battery disconnect, etc… Saving the customer additional components as comparators and external transistors.

4 低功耗 0.4V 0.4V

5 AMS有突出性能的元器件如果被正确的选择应用：
超低功耗 => 超长使用寿命 AMS有突出性能的元器件如果被正确的选择应用： 平均单节AA电池鼠标： AS1323 Vs MAX17222 80%时间: 80µA 20%时间: 11mA 6months with 1 cell 18months with 2 cells 1年的电池寿命 还有多+400h Energy efficiency has become an important selling criteria to end applicatons. Also for line powered applications, which are always on (e.g. W-Lan router, STP, SSD, TV,…), energy consumption has become important. To make this issue transparent the example of wirless mouse is given here. Battery life time has become a key selling proposition. As it is the case in wireless mouse business, where the only last differentiation lies in the battery life time. Vendors explicitly advertise on this (see Logitech). This is an example how excellent efficiency yields an increased battery life time.

6 Lowest Noise => Increase Range
对房屋设计产品而言： LDO 滤波 8m 滤波 12m +50% 范围 较少的元件 High Regulation Performance gives big advantages in terms of optimal supply. Noise sensitive application as RF modules, sensors, analog amplifiers, ADCs and measurement equipment require a very clean supply. e.g. the distance of a wireless link strongly relates to the supply of the RF module. In this example the customer used an additional external filter to improve the regulation performance, but still the range was only in a range 8m.

7 灵活的性能: 低电池和电源ok 降低系统成本 >0.20USD! Power ok: 启动其他系统的系统元件
Comparator Comparator 降低系统成本 >0.20USD! DCDC Power ok: 启动其他系统的系统元件 Clever Features as low battery monitoring, power ok, battery feed through or disconnect are already integrated in SL Power Management The benefit to the customer is that external components and space can be saved. In this example two comparators are required to implement the low battery functionality, which is used in case of power failure to shut down system components in a correct way and save data. For the power ok functionality also an external comparator can be used to signal the valid supply to the system, in order to power up other components in a correct and save way (power sequencing). With LBI (AS1331) and PoK function(AS1340, AS1341, AS1362, AS1343,…) already integrated in the PM a cost saving of at least 0.20USD can be achieved and the PCB space as well. 低电池: 关闭系统进行节省

8 引言 任何产品的应用都需要电源管理！ The nice thing about power management is that every application has a supply and therefore powermangement is needed! But it is important to ask!! e.g. when you sell the attractive and sexy Rotary Encoder it is not enough to close the deal on this only. Just ask one more question: How is it going to be supplied? The power managment market is one of the fastest growing market in the analog semiconductor. Nearly every battery and now also line powered application runs a DCDC or LDO.

9 限制对数标度The Trap with the logarithmic scale!
线性标度 对数标度 This graphs are taken from the Ritech DCDC RT8010 datasheet.

10 效率对比 节电模式 非节电模式 Power Save Modes improve the efficiency at light loads. As you can see on the right figure efficiency drops significantly without power save mode when output current is low. The reason for this is that at light loads the DCDC still switches at a fixed frequency, although it is not necessary. Since every switching cycle produces internal losses the goal of the power save mode reduce switching only to the necessary ones.

11 效率不仅是单一的数据 Current 100mA 5% 10mA t 方案 1: 整 体 效 率 = 93% 方案 2: = 58%
Efficiency is not only a single number on the first page of the datasheet! Efficiency needs to take into account the load conditions over time! In this example we consider an application that consumes 10mA for a certain period of time (e.g. 95%) and then goes into an active stage for 5% of the time e.g. for measurements. When we look at the efficiency graph given on the right we see that both operation points are pretty ok (Efficiency at 10mA is 91% and for 100mA it is even 93%). As a rough estimation the overall efficiency can be calculated. For simplicity we do not distinguish between input and output current. So lets assume currents as inputs to the DCDC. Overall Efficiency = (100mA*DutyCycle(100mA)*Efficiency(100mA)+ 10mA*Duty Cycle(10mA)*Efficiency(10mA)) (100mA*Duty Cycle(100mA)+ 10mA*Duty Cycle(1mA)) So the exact efficiency number is in this case 93%. But let‘s consider a DCDC like RT8010 (see slide 9), where the efficiency drops significantly at light loads. In this case the overall efficiency will be strongly determined by the lower light load efficiency. Doing the math's the efficiency is 58%. As a conclusion it is important to figure out how a system works. As in this example both cases the efficiency given in the datasheet are up to 93%, but the final efficiency in the datasheet is different! t 方案 1: 整 体 效 率 = 93% 方案 2: = 58%

12 AS1323 1.6µA IQ Boost Converter
Key features Benefits 1.6µA 超低静态电流 0.75V to 2V 输入电压 100mA 单节AA电池 输出断开在shutdown状态 增加电池寿命 特别是轻负载应用 最低 1.6µA IQ 应用领域 AS1323 is a hysteretic, 1.6µA quiescent current, DC-DC step-up converter in a small TSOT 5-pin package. The AS1323 delivers 100mA from a single AA cell input and can provide fixed output voltages of 2.7V, 3.0V and 3.3V. The AS1323 operates from a voltage between 0.75V and 2V. The minimum start-up voltage of 0.95V The AS1323 needs only 1.6µA quiescent current and offers a shutdown mode drawing less than 200nA of current, which makes AS1323 optimal for light load applications. Additionally, the AS1323 features a true output disconnect while in shutdown. The AS1323 does not need an external diode and has been designed to operate with physically small external components. Typical external components are two capacitors and a 10µH inductor. The AS1323 is available in a 5-pin TSOT23 package for the industrial temperature range of -40°C to +85°C. Low Power <10mA 单电池应用: as Soap Dispensers, Presenters,无线鼠标, 遥控装置l,.. Minimum Start-Up Voltage [max] Minimum Supply Voltage [typ] better 6% 21% Shutdown Current [max] Quiescent Current [max] 16% 60% 看附录 1.13$ 1k

13 AS1323 竞争优势 最大负载时的效率仅为 85% Outweigh / Explain away: AS1323 优化轻负载!
始终考虑的整体效率。如果应用是一个变动负荷，那么可能是时间的最大值。电流真正需要的是有限的。 See Appendix AS1323输入电压限制在2V ，输出是固定的2.7V ， 3V和3.3V Outweigh / Explain away: 单电池应用是他的目标市场。 AS1323 is optimized for light load applications and single cell input voltage range. Therefore the efficiency at higher loads as 100mA is weaker. In case that efficiency at higher load is required the AS1329 can be used. Always consider the overall efficiency (see slides about efficiency) The input voltage range is limited to 2V, so single cell applications (1.5V battery) is the target application.

14 AS1331 300mA Buck-Boost 转换 NEW ! NEW ! BUCK-BOOST 主要特点 Benefits
1.8 to 5.5V 输入电压 2.5 to 3.3V 输出电压 Up to 90% 效率 低电池检测 / POK 延长使用寿命 较少的外围元件 BUCK-BOOST 应用领域 Supplies that varies significantly as Li-Ion, Li cell battery Super-Caps 多电源应用 (USB or电池) AS1331 implements a 4-switch architecture to deliver efficiencies of up to 90% while the quiescent current is reduced down to as low as 22µA, thereby maximizing efficiency. The AS1331 offers an adjustable output voltage range from 2.5 to 3.3V from an input voltage range of 1.8 to 5.5V. To reduce external part count as well as PCB space fixed output voltage variants of 2.5, 3.0 and 3.3V with ±3% accuracy are also available. Furthermore the AS1331 offers 300mA of output current. Buck Boost converters are used when the desired output voltage is in between the input voltage range. So in cases where the input voltage varies quite significantly the best result in terms of efficiency is obtained with an buck boost converter. e.g. when a Li-ion battery is fully charged the input voltage is 4.2V or higher, in discharge condition the voltage can get down to 2.7V and in future even lower. When the desired supply voltage is e.g. 3.3V a buck boost converter is the optimal solution. Multi supply applications where the system is supplied by two sources, depending on availability. USB (5V) powered and battery powered systems. Other applications: e.g. Supercap discharge, improvement of supplies (+/-10%  +/-3%) The AS1331 additionally offers a battery monitoring circuitry which can also be used for power-ok signaling. 1.29$ 1k

15 AS1331 竞争优势 AS1331 是滞后的 Outweigh / Explain away:
滞后概念中的一大优势条件的静态电流，因此表现在效率上。 固定频率是更具吸引力在噪声敏感应用中。但更昂贵。 在许多供应概念LDOs的使用，不管怎么说让其摆脱噪音。 AS1331 有输出电压 2.5V to 3.3V Outweigh / Explain away: 因为最流行的电源值是3.3V，这适合多种应用。 AS1331 uses the hysteretic principle to deliver efficiencies of up to 90% while the quiescent current is reduced down to as low as 22µA, thereby maximizing efficiency. Fixed frequency concepts do not achieve such low quiescent currents and therefore suffer a worse efficiency at light loads. The output voltage range of AS1331 is limited to 2.5V to 3.3V. But since the most interesting supplies for Buck Boost are in the 3V range that does not limit the market. (Remember! Buck Boosts are used for Vout, which are in the middle of the input voltage range)

16 AS1324 600mA, 1.5MHz Buck 96% 效率 主要特点 有益于 600mA 输出电流 2.7 to 5.5V 输入电压
超过 96%效率 TSOT23-5 Package 具有成本效益的方案 较少的外部元件 96% 效率 应用领域 AS1324 is a DCDC Step down converter with efficiencies up to 96%. It features an adjustable output voltage, which can be set with external resistor divider between 0.6V to 5.5V. But also fixed output voltage variants(1.2V, 1.5V and 1.8V) are available saving the external resistor divider. AS1324 is very powerful and can deliver an output current of up to 600mA from a input voltage between 2.7V to 5.5V, which makes the device ideal for single Li-Ion cell or triple AA cell supplies. The 1.5MHz fixed switching frequency minimizes PCB footprint by allowing the use of tiny, low profile inductors and capacitors. This constant frequency switching results in low, predictable output noise that can be easily filtered. Additionally the AS1324 offers high output voltage accuracy as well as a low output voltage ripple. Additionally the integrated automatic power save mode increases efficiency in light load conditions, consuming only 30µA of quiescent current. The reduced power consumption substantially increases battery life in many applications. Moreover, the AS1324 offers a 100nA typical shutdown mode combined with an output disconnect feature. 手持式仪器（三星） 固态硬盘 (Ritek, Asustek) 供应: 3 cells, Li-Ion battery, 5V rail 0.59$ 1k

17 SATA接口SSD 模块– 最佳效率 AS1324 AS1324 AS1324 可选择AS1324 当系统必须 64GB SSD
SSD Controller AS1324 VREF 1.8V VIN 5V SATA 接口 Flash Memory AS1324 VDD 3.3V, 500mA for 8 32Gbits SSD (Solid State Drives) devices are an emerging market and is currently in their early state. AS1324 offers +10% better efficiency at 600mA than RT8010 (see appendix slide) Flash Memory VDD 3.3V, 500mA for 8 32Gbits AS1324 可选择AS1324 当系统必须 64GB SSD

18 DC/DC降压转换路线图 DC/DC 直流/直流降压转换器优化的SSD Q1/10 Q3/09 Q3/09 Now Now AS1334
Dual DCDC 1A and 0.3A DCDC 2A Output current DCDC 1.5A Output current AS1334 Q1/10 Q3/09 DCDC 0.650A Output current Q3/09 AS1324 Now DCDC 0.6A Output current The DCDC Development pipeline for SSD drives is already well defined and brings more powerful DCDCs (up to 2A) and higher integrated ones as DUAL DCDCs. Now

19 AS1324 竞争优势 这是有竞争力的产品在市场上，同时有较低 的价格在市场上. Outweigh / Explain away:
亚洲主要供应商提供极低成本DCDC 。但一般比较性能（稳定性，效率，分机。部件， .. ） 比Richtek高+10% 效率 See Appendix 其他DCDC 提供跟高的效率 Outweigh / Explain away: 效率要求低在电阻器，这就需要更多的领域，其中驱动器的成本。因此，效率和小形式因素始终是一个权衡。

20 AS1358/59/61/62 RF LDO 主要特点 有益于 92dB PSRR @ 1kHz 9µVrms超低输出噪声
150/300mA 输出电流 Power OK 信号 TSOT23 Package 提高射频连接灵敏度 不需要额外滤波 增加 RF 距离 滤波 12m 超低 噪声LDO 应用领域 AS1358/59 regulators offer optimal solution for low-noise applications requiring highest performance AS1358/59/61/62 family is optimized to deliver outstanding noise performance of less than 9µVRMS and up to 92dB PSRR 1kHz typ). The AS1358/59/61/62 family operates from a 2 to 5.5V supply, which suits is perfectly for dual or triple standard-cell and single Li-Ion battery powered applications. With a low dropout voltage of 70mV 150mA and an extremely low current of only 40µA battery life time can be maximized. "AS1358/59/61/62 are the LDOs of choice for powering circuits that require a low-noise supply, such as RF modules, wireless base stations, sensors and PA bias supplies The AS1358/59/61/62 family offers pre-programmed output voltages in the range between 1.4 to 4.5V with an output voltage accuracy of excellent 1% 300mA). An additional feature of the AS1361/62 is a power-ok output that signals when the output voltage drops out of regulation. Furthermore, the devices offer over-temperature and over-current protection. The AS1358/59 are available in a TSOT23 package with a 3x3mm footprint GPS 接收机 (车辆跟踪) WLAN(无线局域网) ISM 波段收音机电台(433MHz,869MHz) 2.4GH无线电 (Zigbee, 蓝牙) 0.34$ 1k

21 AS1358 竞争优势 MAX 提供 TDFN 2x2 package Outweigh / Explain away:
AS1358有TSOT23封装，适合用于低噪声性能。 如果大小确实是一个问题可提到微型大小的LDO AS1369 （ 1x1mm ） LP5900 是提供 6.5µVrms Outweigh / Explain away: 其实这已经是一个过度，而不是需要的射频。 诺基亚规格30μVrms LDO设计始终是一个贸易平衡问题。例如LP5900输入电压范围为2.5V至5.5V 与AS1358 2V至5.5V PSRR性能没有1359好

22 竞争优势 - LDOs 我们是排第一，在LDO在支持 尺寸 AMS LDOs 提供优良的性能 内部有尺寸不超过1mm²小的DIE
节能 最低压降电压 – 45mV 较低静态电流 – 1.5µA 性能 低噪声 – 9µVRMS 出色的 PSRR – 92dB 1mm 1.4mm AS13985 AS1369 更长电池寿命 增加距离 改进传感器数据

23 凌特在 DCDC 转换IC 优点 技术优势 数据准确 弱点 价格昂贵 AMS机会 由于成本优势 AMS 产品 是可以客户接受的 AMS威胁
工程师对凌特的LCTS性能 非常满意 以至于不想换掉 LTC is clearly the premium supplier in DCDC and LDO business. Their solutions are technical leading edge and high performance. The main opportunity to attack LTC is to make the ams cost advantage obvious to the customer. Therefore purchasers can become our coach. Engineers are probably very well satisfied with the technical performance of LTC and do not want to change.

24 德州仪器公司在DCDC转换 优点 技术优势 数据准确 弱点 不够灵活 AMS的机会 AMS 可以提供为你量身定制的解决方案 AMS的威胁
TI 已经准备转战低价格市场 TI 能够提供“一览子交易” Over the past years TI has become a major analog player. Their new PM ICs are high performance and technically excellent. We also see that TI is willing to fight also on price level especially at high volume accounts. Due to their broad product portfolio package deals are common. As being a big supplier TI focus on high volume applications and therefore does not customize their products to specific applications.

25 亚洲 DCDC 和 LDOs 供应商 优点 非常便宜 弱点 产品性能比较差 数据仅用于 25° 产品支持 供应链 See Appendix
AMS的机会 通过更好的产品性能销售 AMS的压力 客户要求以最低的价格得到最好的解决方案 Asian PM supplier are extremely aggressive on pricing. The lowest market prices always comes from Asian suppliers. The products they are offering suffer from poor performance even though the datasheet says something different. Some products are only specified for room temperature. Main target customers are the low cost applications in consumer market. The typical customer has the “just good enough” requirement and does not value performance.

26 Thank you