AH337-PL-A Datasheet AH337-PL-B, AH337-PG-A, AH337-PL-A | P1-P3

AH337

Document number: DS31050 Rev. 10 - 3

1 of 9

www.diodes.com

January 2018

AH337

SINGLE PHASE HALL EFFECT SWITCH

Description

AH337 is a unipolar Hall-Effect sensor for contactless switching

applications. The device includes an on-chip Hall voltage generator

for magnetic sensing, an amplifier that amplifies the Hall voltage, a

Schmitt trigger to provide switching hysteresis for noise rejection, and

an open-collector output. The band-gap regulator allows a wide

operating voltage range.

When the magnetic flux density (B) is larger than operate point (Bop),

output is switched on (OUT pin is pulled low). The output state is held

on until a magnetic flux density falls below Brp. When B is less than

Brp, the output is switched off.

The AH337 is available in SIP-3 (Ammo Pack), SIP-3 (Bulk Pack) and

SC59 packages.

Features

• Unipolar Hall-Effect Sensor

• 4.2V to 28V DC Operating Voltage

• Temperature Compensation

• Open Drain Pre-Driver

• 25mA Maximum Output Sink Current

• Operating Temperature: -40C to +125C

• SIP-3 (Ammo Pack), SIP-3 (Bulk Pack) and SC59 Packages

(SC59 Is Commonly Known as SOT23 in Asia)

• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

• Halogen and Antimony Free. “Green” Device (Note 3)

Pin Assignments

(Top View)

1.

Vdd

2.

GND

3.

OUT

SIP-3

1. Vdd

GND 2.

3. OUT

(Top View)

SC59

Applications

• VCD/DVD Loader, CD/DVD ROM

• Cover Detector

• Speed Measurement

• Home Appliances

• Home Safety

Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.

2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and

Lead-free.

3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

Typical Applications Circuit

AH337

4.2V ~28V

Output

Vdd

GND

L

R

NOT RECOMMENDED FOR NEW DESIGN

USE AH3377

SIP-3 (Bulk Pack)

AH337

Document number: DS31050 Rev. 10 - 3

2 of 9

www.diodes.com

January 2018

AH337

Pin Descriptions

Functional Block Diagram

Regulator

Hall

plate

Amp

2

GND

OUT3

2

V

dd

1

Absolute Maximum Ratings (@T

A

= +25°C, unless otherwise specified.)

Symbol

Characteristics

Values

Unit

V

dd

Supply Voltage

30

V

B

Magnetic Flux Density

Unlimited

V

DS

Output OFF Voltage

30

V

I

d

Output “ON” Current

Continuous

25

mA

T

S

Storage Temperature Range

-65 to +150

C

T

J(MAX)

Maximum Junction Temperature

+150

C

P

D

Package Power Dissipation

SIP-3 (Ammo Pack)

550

mW

SIP-3 (Bulk Pack)

550

mW

SC59

230

mW

Recommended Operating Conditions (@T

A

= +25°C, unless otherwise specified.)

Symbol

Parameter

Conditions

Min

Max

Unit

Vdd

Supply Voltage (Note 4)

Operating

4.2

28

V

T

A

Operating Ambient Temperature

Operating

-40

+125

C

Notes: 4. The output of IC will be switched after the supply voltage is over 4.2V, but the magnetic characteristics won't be normal until the supply is over 4.5V.

Pin Name

P/I/O

Pin #

Description

Vdd

P

1

Positive Power Supply

GND

P

2

Ground

OUT

O

3

Output Pin

NOT RECOMMENDED FOR NEW DESIGN

USE AH3377

AH337

Document number: DS31050 Rev. 10 - 3

3 of 9

www.diodes.com

January 2018

AH337

Electrical Characteristics (@T

A

= +25°C, V

dd

= 12V, unless otherwise specified.)

Symbol

Characteristic

Test Conditions

Min

Typ

Max

Unit

V

DS (SAT)

Output Saturation Voltage

I

OUT

= 10mA, B > Bop

-

300

400

mV

I

off

Output Leakage Current

B < Brp

-

< 0.1

10

µA

I

dd

Supply Current

Output Open

-

2

4

mA

Magnetic Characteristics (T

A

= +25C, V

dd

= 4.5V to 28V, Note 5)

Symbol

Parameter

Min

Typ

Max

Unit

Bops (South Pole to Brand Side)

Operation Point

90

120

150

Gauss

Brps (South Pole to Brand Side)

Release Point

30

60

90

Gauss

Bhy (|Bopx|-|Brpx|)

Hysteresis

-

60

-

Gauss

Notes: 5. Magnetic characteristics may vary with supply voltage, operating temperature and after soldering.

Performance Characteristics

Marking side

S

SIP-3 (Bulk Pack)

N

Marking side

S

SC59

N

B

hy

V

SAT

V

dd

( Output Voltage )

Brp Bop0

( Magnetic flux density B )

Output

Turn off

Turn on

( off - state )

( on -state )

SIP-3 (Ammo Pack)

NOT RECOMMENDED FOR NEW DESIGN

USE AH3377

AH337-PL-A

AH337-PL-A

Products related to this Datasheet