Diodes ZXBM2004 User Manual

Description

The ZXBM2004 is a 2-phase, Brushless Direct Current (BLDC) motor control pre-driver with variable PWM speed control suitable for fan and blower motors.

For system flexibility, motor speed can be controlled by changing SPD pin voltage which can be either from Thermistor network, external voltage or PWM signal.

To help protect the motor coil, the ZXBM2004 provides Rotor Lock Protection which shuts down the output drive if rotor lock is detected. The device automatically re-starts when the rotor lock is removed.

NEW PRODUCT

A Tachometer output is provided by open-drain Frequency Generator (FG) Pin which allows external interface to monitor motor rotation or speed. The FG output is the magnetic change frequency.

The ZXBM2004 is available in small space saving low prof ile U-QFN3030-16 and QSOP-16 packages.

Features

• Supports two-phase BLDC motor control

• Operating voltage: 4.7V to 18V

o Can be extended with external regulator

• PWM speed control via external Thermister, DC voltage or PWM signals

• Reference voltage output

• Built-in Hall amplifier allows direct connection of Hall

element

• Rotor Lock Protection (Lock detection, output shutdown and automatic re-start)

• Rotor lock detect (RD) output

• Minimum speed setting

• Frequency generator (FG) output for speed measurements

• Low noise

• Space saving low profile U-QFN3030-16 and QSOP-16

packages

• “Green” Molding Compound

ZXBM2004

TWO PHASE VARIABLE SPEED

MOTOR CONTROL PRE-DRIVER

Pin Assignments

(Top View)

Ph1 Ph2

NC FG

V

CC

V+OP Ph1 Ph2 N/C FG RD C

LCK

1

H+

H-

N/C

ThRef

SPD

C

PWM

S

MIN

GND

ZXBM2004

QSOP-16

(Top View )

CC

V+OP

V

H+

H-

NC

ThRef

SPD

C

PWM

MIN

S

GND

U-QFN3030-16

C

LCK

RD

Applications

• Desktop PC and Servers fans and blowers

• Instrumentation fans

• Central heating blowers

• Automotive instrument cooling and climate control

• Extractor fans

• General motors and pumps

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Typical Application Circuit

NEW PRODUCT

ZXBM2004

TWO PHASE VARIABLE SPEED

MOTOR CONTROL PRE-DRIVER

Pin Descriptions

Pin Name Description

H+ Hall input to non-inverting input of internal operational amplifier

H- Hall input to inverting input of internal operational amplifier

ThRef Reference output voltage

SPD

C

PWM

S

MIN

GND Supply return ground pin C

LCK

RD FG Frequency Generator output to provide a tachometer signal

Ph1

Ph2

V+OP

VCC

ZXBM2004

Document number: DS33433 Rev. 5 - 2

Speed control pin; The control signal voltage should be bet ween 3V to 1V for 0% to 100 % (full speed) speed control

PWM frequency setting pin: Connect a capacitor from this pin to ground (0V) to set PWM frequency. Capacitor of 0.1nF will give PWM frequency of 24kHz typical.

Minimum speed setting pin: Voltage between 3V to 1V on this pin sets the minimum speed between 0% to full speed. Lowest minimum speed achieved depends on the motor coil design.

Rotor lock detect and auto re-start timing pin: Connect a capacitor from this pin to ground to set the lock detect and restart timing.

Rotor lock detect pin: Open collector output to indicate rotor lock detection Connect a pull-up resistor from the pin to the pull-up supply rail

Phase-1 low-side external power switch drive output pin: Darlington emitter follower output with active pull down to give source/sink current of 80mA/16mA

Phase-2 low-side external power switch drive output pin: Darlington emitter follower output with active pull down to give source/sink current of 80mA/16mA

Phase output supply voltage pin: The pin allows to optimiz e the supply to output drive depending on whether external power switch is Bipolar switch or MOSFET

Power supply pin

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Functional Block Diagram (Note 1)

Supply Voltage

NEW PRODUCT

V

Speed Control Voltage

SPD

ThRef

C

PWM

SPD

SMIN

PWM Osc

Set Min

Speed

D1

Vref

ZXBM2004

TWO PHASE VARIABLE SPEED

MOTOR CONTROL PRE-DRIVER

D2

V

CC

Phase Drive & Control

V+OP

Set Phase Drive Current Limit

Vcc

Ph1 Lo

Vcc

Ph2 Lo

L1

L2

Locked

Rotor

Detect

Hall Amp

GND

Speed & Lock Detect

RD

FG

Vcc

Hall Bias

Hall

C

LCK

H+

H-

Notes: 1. The ZXBM2004 has an open-collector FG and RD. Typically a pull-up resistor of 10kΩ is recommended from FG or RD pin to the supply voltage.

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ZXBM2004

Absolute Maximum Ratings (T

Symbol Characteristics Values Unit

V

Note: 2. Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings only; functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time.

NEW PRODUCT

3. U-QFN3030-16 dissipation is based on a two-layer 2oz. copper 2”x 2” FR4 substrate PCB with thermal vias to the bottom layer.

CCMAX

I

CCMAX

P

DMAX

TA

T

STG

Supply voltage -0.6 to +20 V IC input current 100 mA

Power Dissipation (Note 4)

Operating ambient temperature -40 to +110 Storage Temperature Range -55 to +150

Recommended Operating Conditions (T

Symbol Parameter Conditions Min Max Unit

VCC TA

Supply Voltage Operating Operating Temperature Range Operating

Electrical Characteristics (T

Symbol Characteristics Conditions Min Typ. Max Unit

ICC

Supply Current No Load (Note 4) - 5.5 7.5 mA VIN Hall amplifier input voltage Diff peak to peak 40 mV VCM

V

VOH

V V

IOH

I

PWMC

I

PWMD

V V

F

Notes: 4. Measure with pins H+, H-, C

5. Measured when opposing Phase Output is Low

Hall amplifier common mode voltage 0.5

Hall amplifier input offset voltage ±7 mV

OFS

IBS

Hall amplifier bias current 400 700 nA

Ph1 and Ph2 output high voltage

Ph1 and Ph2 output low voltage

OLA

Ph1 and Ph2 output low voltage

OLB

Ph1 and Ph2 output source current 80 mA

IOL

Ph1 and Ph2 output sink current 16 mA

C C

C

THH

C

THL

PWM

6. Measured when opposing Phase Output is High

charge current

PWM

discharge current

PWM

high threshold voltage

PWM

low threshold voltage

PWM

PWM frequency

LCK

and C

= 25°C, unless otherwise noted, Note 2)

A

QSOP-16 500 U-QFN3030-16 (Note 3) 1500

= 25°C)

A

= 25°C, V

A

CC

= 12V)

I

= 80mA V

OH

=16mA (Note 5)

I

OH

I

= 50uA (Note 6)

OH

4.5 7.85 µA 38 65 µA 3 V 1 V C

= 0.1nF

PWM

and all other signal pins open circuit

PWM

TWO PHASE VARIABLE SPEED

MOTOR CONTROL PRE-DRIVER

4.7

-40

-2.2

CC

Vcc -1.8 V

0.4 0.6 V

24 kHz

18.0 V

+110

V

-1.5

CC

mW

oC

o

C

o

C

V

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Electrical Characteristics (cont.) (T

Symbol Characteristics Conditions Min Typ. Max Unit

V

ThRef reference output voltgae

ThRef

I

ThRef output current 1 mA

SPDL SPDH ISPD

S

C C

input current V

MIN

SPD voltage minimum 100% PWM drive 1 V SPD voltage maximum 0% PWM drive 3 V SPD voltage maximum

charge current

LCK

discharge current

LCK

high threshold voltage low threshold voltage

Lock condition On:Off ratio 1:12

FG Low level output current 5 mA FG Low level output voltage

FGOL

RD Low level output current 5 mA RD Low level output current

RDOL

tCD

Commutation delay 7.5 µs

NEW PRODUCT

OThRef

I

ISMIN

V

I

LCKC

I

LCKD

V

CLCKTHH CLCK

V

CLCKTHL CLCK

I

FGOL

V

I

RDOL

V

= 25°C, V

A

ZXBM2004

TWO PHASE VARIABLE SPEED

MOTOR CONTROL PRE-DRIVER

= 12V)

CC

I

= 100µA

OThRef

= 2V, SPD=open

IN

V

= 2V

IN

2.8 3.8 µA

4.6 054 µA 3 V 1 V

I

= 5mA

FGOL

I

= 5mA

RDOL

2.88 2.96 3.10 V

-0.25 -0.3 µA

0.8 2 µA

0.5 V

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Functional Descriptions

H+ and H- Hall Inputs

The rotor position is detected by a Hall sensor, with the output applied to the H+ and H-pins. This sensor can be either a 4 pin 'naked' Hall device or of the 3 pin buffered switching t ype. For a 4 pin dev ice the di fferential Ha ll output signal is co nnec ted to the H+ and H-pins. For a buffered Hall sensor the Hall device output is attached to the H+ pin, with a pull-up attached if

needed, whilst the H-pin has an external potential divider attached to hold the pin at half V H-, Ph2 is the active drive.

ThRef - Output Reference Voltage

This is a reference voltage of nominal 3V. It is designed for the abil ity to 'source' and therefore it will not 'sink' any current from a higher voltage. The current drawn from the pin by the minim um speed potential divider to pin S

setting network should not exceed 1mA in total at maximum temperature.

NEW PRODUCT

SPD - Speed Control Input

The voltage applied to the SPD pin provides control over motor spee d by varying the Pulse Width Modulated (PWM) drive ratio at the Ph1 and Ph2 outputs. The control signal takes the form of a voltage input of range 3V to 1V, representing 0% to 100% drive respectively.

If variable speed control is not required this pin can be left with an external potential divider to set a fixed sp eed or tied to ground to provide full speed i.e. 100% PWM drive.

If required this pin can also be used as an enable pin. The application of a voltage >3.0V will force the PWM drive fully off, in effect disabling the drive.

S

– Minimum Speed Setting

MIN

A voltage can be set on S pin such that internally SPD voltage cannot rise above S

speed it therefore restricts the lower speed range of the fan. If this feature is not required the pin is left tied to ThRef so no minimum speed will be set.

If the fan is being controlled from an external voltage source onto the SPD pin then either this feature should not be used or if it is required then a resistor greater than 1kΩ should be placed in series with the SPD pin.

C

– Output PWM Frequency Setting

PWM

This pin has an external capacitor attached to set the PWM frequency for the Phase drive outputs. A cap acitor value of 0.1nF will provide a PWM frequency of typically 24kHz. The C

()()

PWM

T

=

Where: C = (C

V

THH

I

PWMC

T

As these threshold voltages are nominally set to V

PWM

T +=

PWM

I

and V

C2

THLTHH

PWMC

I

PWM

and I is in ms

PWMDPWMC

I

+15) in pF

THL

PWMD

C2

pin via a potential divider between the ThRef and Gnd. This voltage is monitored by the SPD

MIN

voltage. As a higher voltage on the SPD pin represents a lower

MIN

timing period (T

PWM

THLTHH

CVV

×−

+

are the C

are the charge and discharge currents in µA.

PWMD

I

PWM

CVV

×−

pin threshold voltages

= 3V and V

THH

= 1V the equations can be simplified as follows:

THL

TWO PHASE VARIABLE SPEED

MOTOR CONTROL PRE-DRIVER

. When H+ is high in relation to

CC

and any voltage

MIN

) is determined by the following equation:

PWM

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ZXBM2004

Functional Description (cont.)

- Locked Rotor Timing Capacitor

C

LCK

Should the fan stop rotating for any reason, i.e. an obstruction i n the fan blade or a seized bearing, the n the device will ent er a Rotor Locked condition. In this condition after a predetermined time (T will be disabled. After a further delay (T attempt to re-start the fan. This cycle of (T

GND – Supply Return

This is the device supply ground return pin and will generally be the most negative suppl y pin to the fan.

RD - Rotor Lock Detect Output

NEW PRODUCT

This pin is the Locked Rotor status output as referred to in the C and low when it is running.

This is an open collector drive giving an active pull down with the high level being provide d b y an external pull up resistor.

) the controller will re-enable the Phase drive for a defined period (TON) in an

OFF

) and (TON) will be repeated indefinitely or until the fan re-starts.

OFF

timing section above. It is high when the rotor is stopped

LCK

TWO PHASE VARIABLE SPEED

MOTOR CONTROL PRE-DRIVER

) the RD pin will go high and the Phase outputs

LOCK

Hall

V

THH

C

LCK

V

THL

T

Lock

T

Off

On

RD

FG

FR and RD Timing Diagram

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ZXBM2004

Functional Descriptions (cont.)

FG -Frequency Generator (tachometer) Output

This is the Frequency Generator output and is a buffered signal from the Hall sensor. This is an open collector drive giving an active pull down with the high level being provi ded by an external pull up resistor.

Ph1 and Ph2 Output Drives

This pair of outputs drives the external devices. These outputs provide both the commutation and PWM waveforms. The outputs are of the Darlington emitter follower type with an active pull-down to help faster switch off when using bipolar devices. When in the high state the outputs will provide up to 80mA of drive into the base or gates of external tra nsistors as shown in the Typical Application circuit following.

When in the low state the active Phase drive is capable of sinking u p to 16mA when driving low to aid turn off times during

NEW PRODUCT

PWM operation. When the Phase is inactive the output is held low by an internal pull-down resistor.

V+OP Phase Outputs Supply Voltage

This pin is the supply to the Phase outputs and will be connected differently dependant upon external transistor type . For bipolar devices this pin will be connected by a resistor to the V transistor base so its value is chosen accordingly. For MOSFET devices the pin will connect directly to the V

V

– Supply Voltage

CC

This is the device internal circuitry supply voltage. For 5V to 12V fans this can be supplied directly from the Fan Motor suppl y. For fans likely to run in excess of the 18V maximum rating f or the device t his will be s upplied from an external regulat or such as a Zener diode.

pin. The resistor is used to control the current into the

CC

TWO PHASE VARIABLE SPEED

MOTOR CONTROL PRE-DRIVER

CC

pin.

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ZXBM2004

Application Note

The ZXBM2004 is primarily controlled by a voltage o n the SPD pin. A voltage of 1V represents a 100% PWM at the P hase Outputs and in turn represents full speed. 3V on the SPD pin conversely repres ents 0% PWM. The motor can therefore be controlled simply by applying a control voltage onto the SPD pin with the minimal use of external components.

This voltage control method easily lends itself to control by other signal types. For example if a Thermistor is applied to the SPD pin a varying voltage can be generated at the SPD pin as the resistance of the Thermistor varies with temperature.

A common form of control of fans is by a PWM signal derived from a central processor or controller. This signal can be converted into a voltage and that voltage adjusted as necessar y to compensate for motor none linearity, inclusion of the Minimum speed feature etc.

Full applications details and further examples of ho w to control the ZXBM2004 are av ailable in the App lications Notes AN41, AN42 and AN43.

NEW PRODUCT

TWO PHASE VARIABLE SPEED

MOTOR CONTROL PRE-DRIVER

Fig 1. 12V Typical Circuit for Thermistor Controlled Speed

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Application Note (cont.)

NEW PRODUCT

ZXBM2004

TWO PHASE VARIABLE SPEED

MOTOR CONTROL PRE-DRIVER

Fig. 2 Typical Circuit for External PWM Controlled Speed (Single MOSFET)

Fig. 3 Typical Circuit for 48V Input and External PWM Control

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Application Note (cont.)

NEW PRODUCT

ZXBM2004

TWO PHASE VARIABLE SPEED

MOTOR CONTROL PRE-DRIVER

Fig. 4 Typical Circuit for Constant Speed Operation

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ZXBM2004

Application Note (cont.)

External Drive Transistors

Diodes offers a range of devices that are ideally suited to interface between the ZXBM2004 controller and the motor. T he following tables show a selection of products. If your needs are not covered by this selection then please refer to the more comprehensive listings that can be found on the Diodes website: www.didoes.com

MOSFETS

BV

NEW PRODUCT

Part Number Type

Power switch

ZXMN10A09K N 100 7.7 0.085 TO252-3L ZXMN10A25K N 100 6.4 0.125 TO252-3L ZXMN10A25G N 100 4.0 0.125 SOT223 ZXMN10A11G N 100 2.4 0.35 SOT223 ZXMN10A08DN8 2 x N 100 2.1 0.25 SO8 ZXMN10B08E6 N 100 1.9 0.230 SOT23-6

ZXMN10A07Z N 100 1.4 0.7 SOT89 ZXMN6A09K N 60 11.2 0.04 TO252-3L

ZXMN6A25K N 60 10.7 0.05 TO252-3L DMN6068LK3 N 60 8.5 0.068 TO252-3L ZXMN6A09G N 60 7.5 0.04 SOT223 ZXMN6A25G N 60 6.7 0.05 SOT223 ZXMN7A11K N 60 6.1 0.120 TO252-3L ZXMN6A09DN8 2 x N 60 5.6 0.04 SO8 DMN6068SE N 60 5.6 0.068 SOT223 ZXMN6A08G N 60 5.3 0.08 SOT223 ZXMN6A25DN8 2 x N 60 4.7 0.055 SO8 ZXMN6A11Z N 60 3.6 0.120 SOT89 ZXMN6A07Z N 60 2.2 0.250 SOT89 ZXMN6A07F N 60 1.4 0.250 SOT23

DSS

( V )

ID

( A )

TWO PHASE VARIABLE SPEED

MOTOR CONTROL PRE-DRIVER

R

@ VGS = 10V

DS(on)

\( Ω )

Package

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Application Note (cont.)

Bipolar Transistors

Part Number Type

Power switch

FZT855 NPN 150 4 65 @ 0.5/50 SOT223 FMMT624 NPN 125 1 150 @ 0.5/50 SOT23 ZX5T853G NPN 100 6 125 @ 2/100 SOT223 ZXTN19100CZ NPN 100 5.25 65 @ 1/100 SOT89 ZXTN25100BFH NPN 100 3 135 @ 0.5/10 SOT23

NEW PRODUCT

ZXTN25100DFH NPN 100 2.5 170 @ 0.5/10 SOT23 FCX493 NPN 100 1 300 @ 0.5/50 SOT89 FCX1053A NPN 75 3 200 @ 1/10 SOT89 ZXTN19060CG NPN 60 7 155 @ 1/10 SOT223 ZX5T851G NPN 60 6 135 @ 2/50 SOT223 DXT2010P5 NPN 60 5 70 @ 1/10 PowerDI5 FCX493A NPN 60 1 500 @ 1/50 SOT89 FCX619 NPN 50 3 260 @ 2/50 SOT89 FMMT619 NPN 50 2 220 @ 2/50 SOT23 FCX619 NPN 50 3 260 @ 2/50 SOT89

Drive buffer and level shift

FMMT493 NPN 100 1 300 @ 0.5/50 SOT23 FMMT493A NPN 60 1 250 @ 0.5/50 SOT23 ZXTN2038F NPN 60 1 250 @ 0.5/50 SOT23 DSS4160 NPN 60 1 140 @ 0.5/50 SOT563

ZXBM2004

TWO PHASE VARIABLE SPEED

MOTOR CONTROL PRE-DRIVER

V

CEO

( V )

IC

( A )

V

( mV @ A/mA )

CE(sat)

@IC/IB

Package

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UM P

OWER

U

P

O

R

Thermal Performance Characteristics

(1) Package Type: QSOP-16

NEW PRODUCT

0.6

0.5

0.4

(W)

0.3

0.2

MAXIM

0.1

ZXBM2004

TWO PHASE VARIABLE SPEED

MOTOR CONTROL PRE-DRIVER

0

AMBIENT TEMPERATURE (°C)

QSOP16 Derating Curve

80 100 120 140 1800 204060

(2) Package Type: U-QFN3030-16 (Note 7)

0.6

0.5

0.4

(W) WE

0.3

M

0.2

MAXIM

0.1

0

AMBIENT TEMPERATURE (°C)

QSOP16 Derating Curve

80 100 120 140 1800204060

Note: 7. U-QFN3030-16 dissipation is based on a two-layer 2oz. copper 2”x2” FR4 substrate PCB with thermal vias to the bottom layer.

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A

Ordering Information

ZXBM2004

TWO PHASE VARIABLE SPEED

MOTOR CONTROL PRE-DRIVER

ZXBM2004XTC

PackingPackage

Q16:

QSOP-16

J

16 : U-QFN3030-16

Device

NEW PRODUCT

ZXBM2004Q16TC QSOP-16 2500/Tape & Reel TC

ZXBM2004JA16TC U-QFN3030-16 3000/Tape & Reel TC

Notes: 8. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf

9. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. No purposely added lead. Halogen and Antimony free. Please visit our website at http://www.diodes.com/products/lead_free.html

Packaging

(Note 8 & 9)

TC : 13" Tape & Reel

13” Tape and Reel

Quantity Part Number Suffix

Marking Information

(1) Package type: QSOP-16

Part Number Package Identification Code

ZXBM2004Q16TC QSOP-16

ZXBM

2004

(2) Package type: U-QFN3030-16

(Top View)

XX

: Identification Code

Y

XX YWZ

: Year : 0 ~ 9

W

: Week : A ~ Z : 1 ~ 26 week;

a ~ z : 27 ~ 52 week: z represents

52 and 53 week

Z

: A ~ Z : Internal Code

Part Number Package Identification Code

ZXBM2004JA16TC U-QFN3030-16 24

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A

Package Outline Dimensions (All Dimensions in mm)

(1) Package type: QSOP-16

Z

D

E1/

2

E

1

NEW PRODUCT

PIN 1

A

2

A

1

D

E/2

E

e

b

h

4

x

︵

︶

θ1

c

SEE DETAIL 'A

︵4

x

︶

θ1

2

θ

L

1

ZXBM2004

TWO PHASE VARIABLE SPEED

MOTOR CONTROL PRE-DRIVER

QSOP-16

Dim Min Max Typ

1.55 1.73 -

1

0.10 0.25 -

2

1.40 1.50 -

b

'

R

1

R

θ

GAUGE PLANE SEATING PLANE

L

2

0.20 0.30 -

c

0.18 0.25 -

D

4.80 5.00 -

E

5.79 6.20 -

E1

3.81 3.99 -

e h L

L1 L2

R

R1 ZD

θ

θ1 θ2

0.635 BSC

0.254 0.508 -

0.41 1.27 -

1.03 REF

0.254 BSC

0.0762 - -

0.23 REF 0° 8° 5° 15° 0° - -

ll Dimensions in mm

(2) Package type: U-QFN3030-16

A3

A

A1

SideView

D

e

(Pin #1 ID)

D2

0.450

E2

0

0.20

R

E

L (16x)

ZXBM2004

Document number: DS33433 Rev. 5 - 2

Z (8x)

b (16x)

BottomView

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U-QFN3030-16

Dim Min Max Typ

A 0.55 0.65 0.60 A1 0 0.05 0.02 A3 — — 0.15

b 0.18 0.28 0.23

D 2.95 3.05 3.00 D2 1.40 1.60 1.50

E 2.95 3.05 3.00 E2 1.40 1.60 1.50

e — — 0.50

L 0.35 0.45 0.40

Z — — 0.625

All Dimensions in mm

February 2012

V

A

V

X

Suggested Pad Layout

(1) Package type: QSOP-16

NEW PRODUCT

Y1

X1

Y (16x)

C

X (16x)

ZXBM2004

TWO PHASE VARIABLE SPEED

MOTOR CONTROL PRE-DRIVER

Dimensions

C X

X1

Y

Y1

ll Dimensions in mm

alue

(in mm)

0.635

0.350

4.795

0.1.450

6.400

(2) Package type: U-QFN3030-16

C

G1

X1

X (16x)

Y1

G

Y (16x)

Dimensions

C G

G1

1

Y

Y1

All Dimensions in mm

alue

(in mm)

0.500

0.150

0.350

1.800

0.600

1.800

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Taping Orientation

For QSOP-16 and U-QFN3030-16

NEW PRODUCT

ZXBM2004

TWO PHASE VARIABLE SPEED

MOTOR CONTROL PRE-DRIVER

Notes: 10. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf.

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ZXBM2004

TWO PHASE VARIABLE SPEED

MOTOR CONTROL PRE-DRIVER

NEW PRODUCT

IMPORTANT NOTICE

DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).

Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages.

Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.

Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks.

LIFE SUPPORT

Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:

A. Life support devices or systems are devices or systems which:

1. are intended to implant into the body, or

2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user.

B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected

to cause the failure of the life support device or to affect its safety or effectiveness.

Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.

www.diodes.com

ZXBM2004

Document number: DS33433 Rev. 5 - 2

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www.diodes.com

February 2012