Analog Power Inc. Analog Power Target Markets & Applications - - PowerPoint PPT Presentation

Analog Power Inc.

Analog Power Confidential

Analog Power Target Markets & Applications

• Consumer Electronics
• Notebook Computers
• Desktop/Servers
• Battery Packs & Chargers
• Industrial & Motor Control
• Communication, PoE
• Mobile Phone Handset
• HDDs, Data Storage
• LCD Monitors & TV
• LED lighting

Analog Power Confidential

Analog Power Advantages

• Worldwide presence, strong sales support especially in

Asia

• Packaging – industry standard AND new packages e.g.

DFN1.6x1.6 - small & cost effective –

• Cost effective silicon manufacturing – multiple foundries
• Multi-sourced manufacturing to reduce risk, provide

flexibility for upsides, and to remain competitive, customer gets good supply

• Exciting product line with good fit for high growth markets

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Application: Power Bank

• MOSFETs used to make 5V from Li Ion cells

– DC DC Boost converter – Needs small low RDS 30V FETs with RDS ratings at 2.5V

• Also use MOSFETs for cell

protection like battery packs

• Examples of suitable MOSFETs:

Part Configuration VDS Max V VGS Max V RDS(on) m Ohm @ VGS = ID Max A Package 4.5V 2.5V AM7306NA Single N 30 8 5 6.9 22 DFN3X3 AM7408NA Single N 30 8 5 6.9 26 SOIC-8PP AM7336N Single N 30 8 9 11 16.2 DFN3X3 AM4430N Single N 30 12 13.5 20 13 SO-8 AM2338NE Single N 30 8 31 36 5.2 SOT-23

• VDS rating = 20/30V, RDS rating at 2.5V+, low on resistance

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Application: Battery Powered Electronics

Examples: wireless barcode scanner, portable DVD/media player, high end camera, medical instruments e.g. portable ultrasound, blood pressure

• Battery powered means three things:

– Power management (battery life) is important: Loadswitches – Battery voltages need to be converted into say 3.3V : DC/DC Conversion – Battery charging needs to be controlled: Power routing

• All of these use MOSFETs

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DC/DC Conversion

• Electronics today use many

different voltages, 1.2V, 1.8V, 3.3V, 5V

– All voltages must be made from battery voltage using DC/DC conversion – Most common circuit is synchronous buck (step down) – Synchronous buck circuit as shown uses two MOSFETs and is very common circuit and the same topology is used for controlling the charging of batteries – Step up or boost converters also used and are common for driving white LEDs or to make say 12V from a single Li Ion cell (as also used in Power bank)

Synchronous Buck Converter also used for battery charging Boost converter as used for driving white LEDs

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MOSFETs for 6 - 20V Buck Converters

Load Current IOUT (A) MOSFET Part Type VDS Max V VGS Max V RDS(on) m Ohm @ VGS = Package 10V 4.5V

<2A Q1 AM1430N Single N 30 20 58 82 SC-70-6 Q1 AMB430N Single N 30 20 24 37 DFN1.6X1.6-6PP Q2 AM7330N Single N 30 20 22 30 DFN3X3 2<IOUT<5A Q1 & Q2 AMS932N Dual N 30 20 9 15 DFN3X3 Q1 AM7330N Single N 30 20 22 30 DFN3X3 Q2 AM7308NA Single N 30 20 9 15 DFN3x3

6 -20V In 1 to 3.3V Out Q1 Q2 Convert battery voltage to the CPU (etc) voltage VIN typically 6V to 20V, (2 to 4 Li Ion cells)

• Board space is often critical
• Efficiency important, low Qg is important
• If VIN > 2 X VOUT Q2 should be lower RDS than Q1
• Q1 MOSFET rated current = ~IOUT
• Q2 rated current = ~2 x IOUT
• For Low VIN, VGSmax = 12V FETs may be best choice

Examples

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MOSFETs for Boost Converters

Convert battery voltage to a higher voltage for circuit needs or White LED

• MOSFET VDS rating > ~1.5 x VOUT
• 100V MOSFETs most common
• Switching losses tend to be high due to higher voltage
• Input current > output current, high ripple current
• RDS and QG both very important

Load Current IOUT (A)

VOUT V

Part Type VDS Max V VGS Max V RDS(on) m Ohm @ VGS = Package 10V 4.5V

<0.5A <40 AMA460N Single N 60 20 27 33 DFN2x2 60 AMA410N Single N 100 20 92 99 DFN2x2 60 AM3470N Single N 100 20 170 185 TSOP-6 0.5<IOUT<2 A <40 AMA460N Single N 60 20 27 33 DFN2x2 60 AM7102NA Single N 100 20 22 30 DFN3X3 60 AM7410N Single N 100 20 15 19 DFN5X6

6 -20V In 12 – 80V Out Examples

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Application: Network Switches & Communications Equipment

End products include

– Switches, Enterprise WiFi access points

Applications:

• Point of Load DC/DC conversion

– Power is often routed on a board as 12V and converted down to the right voltage at the load, this is called Point of Load, or PoL

• 48V to 12V or 3.3V conversion

– PoE: Power is sent via networking cables and must be converted from 48V to 12V (and then to 3.3V at PoL) or 3.3V – Central office telecom equipment, line cards: Power is routed at 48V and must be converted locally

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MOSFETs for PoL

Load Current IOUT (A) MOSFET Part Type VDS Max V VGS Max V RDS(on) m Ohm @ VGS = Package 10V 4.5V

<5A Q1 AM1430N Single N 30 20 58 82 SC-70-6 Q1 AMB430N Single N 30 20 24 37 DFN1.6X1.6-6PP Q2 AMA430N Single N 30 10.5 18 30 DFN2X2 5<IOUT<15A Q1 & Q2 AMS932N Dual N 30 20 9 15 DFN3X3 Q1 AMA430N Single N 30 10.5 18 30 DFN2X2 Q2 AM7302N Single N 30 20 4 6 DFN3X3

12V In 1 to 3.3V Out Q1 Q2 Convert 12V to the right voltage for the CPU etc locally Allows more precise control of voltage at CPU and lower losses in the PC board due to lower current

• Board space is often critical
• Efficiency moderately important
• Q2 should be lower RDS than Q1
• Q1 MOSFET rated current = ~IOUT
• Q2 rated current = ~2 x IOUT

Examples

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PoE Applications

Active Clamp PWM Synchronous Rectifier

TI Reference Schematic for PoE PD power supply:

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MOSFETs for PoE PWM Applications

Part VDS Max V RDS(on) m Ohm @ VGS = ID Max A Package 10V 4.5V

AM4390N 1 150 625 900 1.9 SO-8 AM3490N 1 150 700 1200 1.1 TSOP-6 AMR490N 2 150 240 260 3.8 SOIC-8PP AM7498N 150 360 370 3.1 SOIC-8PP AM7150N 150 255 290 3.6 DFN3X3 AM4392N 150 255 290 2.9 SO-8 AM20N15-250D 150 280 355 11 TO-252 AM4470N 200 3 295 335 2.7 SO-8 AM7200N 200 3 400 450 3 SOIC-8PP

15W and 25W PD

Notes: 1 AM4390N and AM3490N are best suited for 15W applications only 2 AMR490N is a new product with high efficiency and is a great product to suggest as the best choice 3 AM4392N is a good choice to replace Si4848DY and FDS2672 and a good cost effective choice 4 Most designs use 150-V MOSFETs but occasionally 200V FETs are preferred

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PoE Active Clamp MOSFET

• VDS should be the same as the main PWM FET – typically 150V,

clamp FET is usually a P-Channel, but can be N-Channel

• Because the average current is much lower, a higher on-resistance

and smaller package is usually used, e.g. SOT-23 or DFN3x3

• Analog Power has the best range of small package 150V/200V P/N

for this application in the industry

Part VDS Max V N / P RDS(on) m Ohm @ VGS = ID Max A Package 10V 4.5V

AM7001P

• 200

P 1050 1100* 1.6 DFN3x3 AM2391P

• 150

P 1200 1300 0.9 SOT-23 AM7151P

• 150

P 500 530 3 DFN3x3 AM2390N 150 N 700 1200 1.1 SOT-23 AM3490N 150 N 700 1200 1.1 TSOP-6 AM5350N 150 N 700 1200 1.3 DFN2x3 AM7000N 200 N 295 340 3 DFN3x3

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Synchronous Rectification PoE and Other Transformer Based Circuits

Diode Version Synchronous Rectification Version When transformer supplies power Current flows through D1

Q1 Q2

When primary MOSFET is off (no power from transformer) Current flows through D2 When transformer supplies power Current flows through Q1 When primary MOSFET is off (no power from transformer) current flows through Q2 MOSFETs can conduct using built-in diode, but are turned on as MOSFETs and give much lower voltage drop and therefore higher efficiency The simple gate drive circuit shown here is usually replaced with a more complicated circuit that includes clamps and delays

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Synchronous Rectification MOSFETs

• Voltage rating depends on the output voltage of the power supply

and should be about 8x the output voltage, some designs use ~6x

– 3.3V output needs 30V MOSFET, 5V output 50V, 12V output 80/100V

• Low RDS needed to give low voltage drop

Examples of Analog Power MOSFETs for this application:

Part VDS Max V VGS Max V RDS(on) m Ohm @ VGS = ID Max A Package 10V 4.5V

AM4362N 30 20 6 8 19 SO-8 AM7302N 30 20 4 6 24.2 DFN3x3 AM7466N 60 20 6 7 20 SOIC-8PP AM7468N 60 20 17 21 15 SOIC-8PP AM4462N 60 20 22 26 9.7 SO-8 AM7462N 60 20 22 26 13 SOIC-8PP AM7380N 80 20 35 40 12 DFN3x3 AM7482N 80 20 11 13 18 SOIC-8PP AM7480N 80 20 26 36 15 SOIC-8PP AM7414NA 100 20 12 14 17 SOIC-8PP

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Summary of Applications & Benefits

End Product MOSFET Applications Battery Pack cell protection switches fuse blowing circuit Power Bank DC/DC conversion cell protection switches fuse blowing circuit Radio Control electronic speed control servo battery chargers/battery packs Cordless Tools electronic speed control battery chargers/ packs EBike electronic speed control battery packs Communications PoL DC/DC 48V In DC/DC Synchronous Rectification PoE PWM MOSFET Active Clamp Synchronous Rectification Battery Equipment DC/DC conversion load switch DC/DC conversion

Analog Power:

• The best range of ultra-small low on-resistance MOSFETs

– DFN3x3, SOT-23, SC-70, DFN2x2 etc

• The best range of cost effective low low RDS(on) MOSFETs (e.g. 1.5mW) for

high current applications eg cordless drill and E-bike

• The best range of application specific MOSFETs e.g. DFN2x5 for battery pack