Diodes AH3761 User Manual

AH3761

HIGH SENSITIVITY HALL EFFECT LATCH

Features

• 3V to 28V DC operation voltage

• Chopper stabilized

• Wide operating voltage range

• Built-in power reverse protection

• Built-in voltage overshoot protection

• Output short circuit protection

• Open drain pre-driver

• SIP3 and SC59 (Commonly known as SOT23 in Asia)

: Available in “Green” Molding Compound (No Br, Sb)

• Lead Free Finish/RoHS Compliant (Note 1)

Application

• Brush-less DC Motor Commutation

• RPM Detection

• Consumer and industrial position sensor

• Flow meters

Typical Application Circuit

Vdd

General Description

AH3761 is an integrated Hall effect latched sensor designed for electronic commu ta tion of brush-less DC motor app l ic a ti on s . The device includes an on-chip Hall voltage generator for magnetic sensing, a comparator that amplifies the Hall voltage, and a schmitt trigger to provide switching hysteresis for noise rejection, and open drain output. An internal bandgap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range.

If a magnetic flux density larger than threshold Bop, DO is turned on (low). The output state is held until a magnetic flux density reversal falls below Brp causing DO to be turned off (high).

R

1

AH3761

3

Output

2

GND

AH3761 Rev. 1 1 of 9 SEPTEMBER 2009

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Ordering Information

AH3761

HIGH SENSITIVITY HALL EFFECT LATCH

A H 3 7 6 1 - X G - X

Package

P : SIP3

W : SC59

Green

G : Green

A : Ammo Box (Note 3) B : Bulk (Note 4)

7 : Tape & Reel

Packing

Device

AH3761-PG-A AH3761-PG-B P SIP3 1000 -B NA NA NA NA

AH3761-WG-7 W SC59 NA NA 3000/Tape & Reel -7 NA NA

Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html

2. 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.

3. Ammo Box is for SIP3 Spread Lead.

4. Bulk is for SIP3 Straight Lead.

Package

Code

P SIP3 NA NA NA NA 4000/Box

Packaging

(Note 2)

Bulk 7” Tape and Reel Ammo Box

Quantity

Part

Number

Suffix

Quantity

Part

Number

Suffix

Quantity

Part

Number

Suffix

-A

Pin Assignments

(1) SIP3 (2) SC59

( Top View )

OUT

3.

2.

GND

GND 2.

3.

OUT

1.Vdd

1.

Vdd

Pin Descriptions

Pin Name P/I/O Pin # Description

Vdd P 1 Positive Powe r Supply GND P 2 Ground OUT O 3 Output Pin

AH3761 Rev. 1 2 of 9 SEPTEMBER 2009

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T

)

Block Diagram

Vdd

Cancellation

AH3761

HIGH SENSITIVITY HALL EFFECT LATCH

Power sw itch

To All S u b c irc uits

Dynamic Offset

Sample and Hold

Low-Pass Filter

VOU

Amp

Control

Current

Limit

GND

Absolute Maximum Ratings (at T

= 25oC)

A

Symbol Characteristics Values Unit

Vdd Supply Voltage 30 V

Vrdd Reverse Battery Voltage -30 V

B Magnetic Flux Density Unlimited

VDS Output OFF Voltage 30 V

I

Output “On” Current (Peak) 100 mA

O(peak

TST Storage Temperature Range -65~+150

T

Maximum Junction Temperature 150

J(MAX

PD Package Power Dissipation

θ

JC

Thermal Resistance Junction to case

SIP3 550 mW SC59 230 mW SIP3 227 SC59 543

Recommended Operating Conditions

Symbol Characteristic Conditions Min Typ. Max Unit

Vdd Supply Voltage Operating 3 24 28 V

TA Operating Ambient Temperature Operating -40 - 125

°C °C

°C/W °C/W

°C

AH3761 Rev. 1 3 of 9 SEPTEMBER 2009

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r

f

AH3761

HIGH SENSITIVITY HALL EFFECT LATCH

Electrical Characteristics (T

=+ 25°C, Vdd =24V, Note 7)

A

Symbol Characteristic Test Conditions Min Typ. Max Unit

Vo(sat) Output Saturation Voltage Iout =20mA, B>Bop - 300 500 mV

Ioff Output Leakage Current VO =24V, B<Bop - < 0.1 10 u A

Idd Supply Current Output Open - 4 6 mA

t

f

c

Output Rising Time Output Falling Time Chopping Fre qu e ncy - 300 - KHz

RL=10KΩ, CL =16pF RL =10KΩ, CL =16pF

- 340 - ns

- 20 - ns

IOM Output Current Limit B>Bop (Note 5) 50 70 90 mA

t

ST

Notes: 5. The device will shut down operating after the output current IO is over the output current limit I up operating after resetting the supply voltage Vdd.

6. I

7. Typical data is at T

Start-up time of IC Vdd>3V, B>Bop (Note 6) - 47 - us

for 160us (typically). The device will re-start

OM

initial power on time, the output state is kept in “High” in this start-up time of IC.

n

=+25°C, Vdd=24V and is design information only.

A

Magnetic Characteristics (T

=+ 25°C, Vdd =3V t o 28V, Note 8 )

A

(1mT=10Gauss)

Symbol Parameter Min Typ. Max Unit

Bop Operate Point 5 30 60 Gauss

Brp Release Point -60 -30 -5 Gauss

Bhys Hysteresis - 60 - Gauss

Notes: 8. Magnet ic cha racterist ics are for design information, which will vary with supply voltage, operating temperature and after soldering.

Output

V

dd

Marking side

S

Marking side

(off-state)

Turn off Turn on

Bhy

(Output Voltage)

N

(SC59)

N

(SIP3)

V

SAT

Brp Bop0

(Magnetic Flux Density B)

AH3761 Rev. 1 4 of 9 SEPTEMBER 2009

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(on-state)

V

SAT

Performance Characteristics

(1) SIP3

TA (°C)

PD (mW)

TA (°C)

PD (mW)

P

(mW )

D

600 500 400 300 200

25 50 60 70 80 85 90 95 100

550 440 396 352 308 286 264 242 220

105 110 115 120 125 130 135 140 150

198 176 154 132 110 88 66 44 0

Pow er Dissipation Curve

AH3761

HIGH SENSITIVITY HALL EFFECT LATCH

100

0

0 25 50 75 100 125 150

-40

(2) SC59 (Commonly known as SOT23 in Asia)

TA (°C)

PD (mW)

P

25 50 60 70 80 90 100 110 120 125 130 140 150

230 184 166 147 129 110 92 74 55 46 37 18 0

(m W )

D

300

200

100

Power Dissipation Curve

T

A (°C )

0

0 25 50 75 100 125 150

-40

T

(°C )

A

AH3761 Rev. 1 5 of 9 SEPTEMBER 2009

Marking Information

(1) SIP3

( Top View )

Part Number

(2) SC59 (Commonly known as SOT23 in Asia)

3761

Y WW X

AH3761

HIGH SENSITIVITY HALL EFFECT LATCH

: Year : 0~9

Y

WW

: Week : 01~52, "52" represents

52 and 53 week

X

: Internal Code : A~Z : Green

( Top View )

XX : Identification code

: Year 0~9

Y

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

XX Y W

X

W

a~z : 27~52 week; z represents

52 and 53 week

: A~Z : Green

X

Part Number Package Identification Code

AH3761 SC59 P8

AH3761 Rev. 1 6 of 9 SEPTEMBER 2009

HIGH SENSITIVITY HALL EFFECT LATCH

Package Information (All Dimensions in mm)

(1) P ackage Type: SIP3 for Bulk only

0.51mm NOM

AH3761

2.00 +/-

0.10mm

1.15 +0.10mm/ -0.20mm

BRANDED SURFACE

Active Area Depth Sensor Location

Package Dimension

123

AH3761 Rev. 1 7 of 9 SEPTEMBER 2009

Package Information (Continued)

(2) Package Type: SIP3 for Ammo Pack-only

AH3761

HIGH SENSITIVITY HALL EFFECT LATCH

(3) SC59 (Commonly known as SOT23 in Asia)

O

1.00/

1.30

0.013/0.10

0.35/0.50

TOP VIEW

1.90

2.90/3.10

0.95

2.70/

1.50/

1.70

3.00

0.35/0.55

0.10/0.20

0O/8

AH3761 Rev. 1 8 of 9 SEPTEMBER 2009

AH3761

HIGH SENSITIVITY HALL EFFECT LATCH

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Diodes Incorporated do es not warrant or accept an y liabilit y whatsoever in re spect of any product s purchased through unaut horized sales channel. Should Customers purchase or use Diod es Incorporated products for any unintend ed or unauthorized application, Custom ers shall indemnify and hold Diodes Incorpor ated and its repres entatives harmless agai nst all claims, damages , expenses, and atto rney fees arising out of, directly or indi re ct l y, any c l a im of person al i nj u ry or death ass oci a t e d with suc h uni nte nde d or un authorized application.

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Diodes Incorporated products are specific ally not authorized for use as critical components in life support devic es or systems without the express written approval of t he Chief Execut ive 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 c omponent in a lif e support devi ce or system whose failure t o perform can be reaso nably expected

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

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IMPORTANT NOTICE

LIFE SUPPORT

AH3761 Rev. 1 9 of 9 SEPTEMBER 2009

Diodes AH3761 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual