Diodes AH276Q User Manual

A



Green

H276Q

COMPLEMENTARY OUTPUT HALL EFFECT LATCH

Description

AH276 are integrated Hall sensors with output drivers, mainly

designed for electronic commutation of brush-less DC Fan. This IC

internally includes the regulator, protecting diode, Hall plate, amplifier,

comparator, and a pair of complementary open-collector outputs (DO,

DOB).

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

DO will turn on (low), and meanwhile DOB will turn off (high). Each

output is latched until B is lower than release point (Brp), and then

DO, DOB transfer each state.

For DC fan application, sometimes need to test power reverse

connection condition. Internal diode only protects chip-side but not for

coil-side. If necessary, add one external diode to block the reverse

current from coil-side.

Features

 On-chip Hall sensor with two different sensitivity and hysteresis

settings for AH276

 Built-in protecting diode only for chip reverse power connecting

 -20°C to +85°C operating temperature

 Lead Free Package: SIP-4L

 SIP-4L: Available in “Green” Molding Compound (No Br, Sb)

 Lead-Free Finish; RoHS Compliant (Notes 1 & 2)

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

Notes: 1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied.

2. See http://www.diodes.com/quality/lead_free.html 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.

Pin Assignments

( Top View )

276

12 43

Applications

 Dual-coil Brush-less DC Motor

 Dual-coil Brush-less DC Fan

 Revolution Counting

 Speed Measurement

1 : Vcc

2 : DO

3 : DOB

4 : GND

Typical Applications Circuit

AH276Q

Document number: DS31066 Rev. 6 - 2

Brush-less DC Fan

1 of 6

www.diodes.com

September 2013

© Diodes Incorporated

A





Pin Descriptions

Pin Name P/I/O Pin # Function

VCC

DO O 2 Output Pin

DOB O 3 Output Pin

GND P 4 Ground

P 1 Power Supply Input

Functional Block Diagram

1

Vcc

REG.

H276Q

DO

2

Hall Plate

Amp

Absolute Maximum Ratings (@T

Symbol Parameter Rating Unit

VCC

V

RCC

B Magnetic Flux Density Unlimited

Io

Ts Storage Temperature Range -65 ~ +150

PD Package Power Dissipation (SIP-4L) 550 mW

TJ



JA

JC

Note: 3. PD shall be within Safety Operation Area.

Supply Voltage 20 V

Reverse VCC Polarity Voltage -20 V

Output “on” Current
(Note 3)

Maximum Junction Temperature +150

Thermal Resistance Junction-to-Ambient (SIP-4L) 227

Thermal Resistance Junction-to-Case (SIP-4L) 49

= +25°C, unless otherwise specified.)

A

Continuous 0.4

Peak (Start Up) 0.7

T

A

T

J

Tc

DOB

GND

3

4

A Hold 0.5

C

C

C/W

C/W

AH276Q

Document number: DS31066 Rev. 6 - 2

JA

JC

2 of 6

www.diodes.com

September 2013

© Diodes Incorporated

A

Recommended Operating Conditions (@T

Symbol Parameter Conditions Min Max Unit

VCC

TA

Note: 4. The output DO/DOB is switching as magnetic field change (S>300G, N<-300G).

Electrical Characteristics (@T

Symbol Parameter Conditions Min Typ Max Unit

VZ

V

CE(SAT)

I

CEX

ICC

Output Zener Breakdown — 35 — V

Output Saturation Voltage

Output Leakage Current

Supply Current

Magnetic Characteristics (Note 5) (@T

A grade

Symbol Characteristic Min Typ Max Unit

Bop Operate Point 10 — 50 Gauss

Brp Release Point -50 — -10 Gauss

B grade

C grade

Note: 5. Magnetic characteristics are for design information, which will vary with supply voltage, operating temperature and after soldering.

Bhy Hysteresis — 75 — Gauss

Symbol Characteristic Min Typ Max Unit

Bop Operate Point 5 — 70 Gauss

Brp Release Point -70 — -5 Gauss

Bhy Hysteresis — 75 — Gauss

Symbol Characteristic Min Typ Max Unit

Bop Operate Point — — 100 Gauss

Brp Release Point -100 — — Gauss

Bhy Hysteresis — 75 — Gauss

Supply Voltage (Note 4) Operating 3.5 20 V

Operating Ambient Temperature Operating -20 +85

= +25°C, unless otherwise specified.)

A

= +25°C, VCC = 14V, unless otherwise specified.)

A

DO

= +25°C, unless otherwise specified.)

A

VCC = 14V, IL = 400mA

VCE = 14V, VCC = 14V

VCC = 20V, Output Open

—

—

7 16 25 mA

0.6 0.9 V

<0.1 10 µA

DOB

H276Q

C

( off-state )

Vcc

Turn off

( Output Voltage )

N

( Magnetic flux density B )

AH276Q

Document number: DS31066 Rev. 6 - 2

Bhy

Brp Bop

0

Turn on

( on-state )

Vsat

( Output Voltage )

( on-state )

S

www.diodes.com

N

3 of 6

( off-state )

Turn on

Bhy

Turn oFF

Vsat

Brp Bop

0

( Magnetic flux density B )

Vcc

S

September 2013

© Diodes Incorporated

A

Performance Characteristics

H276Q

TA (C)

PD (mW)

TA (C)

PD (mW)

P

D (mW)

Ordering Information

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

Power Dissipation Curve

600

500

400

300

200

100

0

0 25 50 75 100 125 150

85

T

A (°C)

Part Number

AH276Q-PL-B-A P SIP-4L 1000 -B A

AH276Q-PL-B-B P SIP-4L 1000 -B B

AH276Q-PL-B-C P SIP-4L 1000 -B C

AH276Q-PG-B-A P SIP-4L 1000 -B A

AH276Q-PG-B-B P SIP-4L 1000 -B B

AH276Q-PG-B-C P SIP-4L 1000 -B C

Note: 6. Please refer to page 3 (Magnetic Characteristics table).

AH276Q

Document number: DS31066 Rev. 6 - 2

Package

Code

Packaging

Quantity Part Number Suffix

4 of 6

www.diodes.com

Bulk

Magnetic

Characteristics

September 2013

© Diodes Incorporated

A

Marking Information

Part Number

( Top View )

276Q

Y WW X

Y

: Year : 0~9

WW

: Week : 01~52, "52" represents

52 and 53 week

X : Internal Code : a~z : Lead Free

A~Z : Green

H276Q

SIP-4L

Package Outline Dimensions (All dimensions in mm.)

Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for latest version.

a1

a2

B

A

C

H

J

K

E

I

D

F

L

SIP-4

Dim Min Max

A 5.12 5.32
B 4.10 4.30
C 3.55 3.75
D 0.38 0.44
E 0.35 0.41
F 1.24 1.30
H 1.32 1.52

I 1.45 1.65
J 0.00 0.2
K 13.00 15.5
L 0.63 0.83

a1
a2 4° 7°

All Dimensions in mm

3

5°

Active Area Depth

AH276Q

Document number: DS31066 Rev. 6 - 2

0.7mm

Marking side

www.diodes.com

1.1士0.1mm

5 of 6

1.95士0.1mm

1234

Sensor Location

September 2013

© Diodes Incorporated

A

H276Q

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.

This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.

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.

Copyright © 2013, Diodes Incorporated

www.diodes.com

IMPORTANT NOTICE

LIFE SUPPORT

AH276Q

Document number: DS31066 Rev. 6 - 2

6 of 6

www.diodes.com

September 2013

© Diodes Incorporated