Diodes AH41 User Manual

BIPOLAR HALL-EFFECT POSITION SENSORS AH41

Data Sheet

General Description

The AH41 is an integrated Hall-effect latched sensor designed for electronic commutation of brushless DC motor applications. The device includes an on-chip Hall voltage generator for magnetic sensing, a comparator that amplifiers the Hall voltage, and a Schmitt to provide switching hysteresis for noise rejection and open-collector output. An internal bandgap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range.

A north pole of sufficient strength will turn the output ON. In the absence of a magnetic field, the output is OFF.

This IC is available in TO-92S-3 package.

Features

On-chip Hall Sensor

•

• Wide Operating Voltage Range: 4V to 24V

• Internal Bandgap Regulator for Temperature Compensation

• Maximu m Output Sink Current: 50mA

• Low Profile TO-92S-3

• Operating Temperature: -40˚C to 1 50˚C

• ESD Rating: 2000V (Human Body Model)

300V (Machine Model)

Application

• Brushless DC Motor

TO-92S-3

Figure 1. Package Type of AH 41

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Data Sheet

BIPOLAR HALL-EFFECT POSITION SENSORS AH41

Pin Configuration

Z3 Package (TO-92S-3)

Figure 2. Pin Configuration of AH41 (Front View)

Pin Description

Pin Number Pin Name Function

1 VCC Power supply pin 2 GND Ground pin 3 OUTPUT Output pin. It is low during the N magnetic field

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Data Sheet

BIPOLAR HALL-EFFECT POSITION SENSORS AH41

Functional Block Diagram

Figure 3. Functional Block Diagram of AH41

Ordering Information

AH41 -

Circuit Type

Package Z3: TO-92S-3

G1: Green

Magnetic Characteristics A: 30 to 75 Gauss B: 5 to 105 Gauss

Package Temperature Range Part Number Marking ID Packing Type

TO-92S-3

BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant and green.

-40 to 150°C

AH41Z3-AG1 AH41 Bulk AH41Z3-BG1 AH41 Bulk

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Data Sheet

BIPOLAR HALL-EFFECT POSITION SENSORS AH41

Absolute Maximum Ratings (Note 1)

Parameter Symbol Value Unit

Supply Voltage VCC Output OFF Voltage VCE 30 V Output Sink Current (Continuous C ur rent) I Power Dissipation (TA=25°C) Storage Temperature T Junction T emperature TJ 150 ESD (Machine Model) 300 V ESD (Human Body Model) 2000 V

50 mA

OUT

400 mW

P

D

-65 to 150

STG

-24 to 28

V

°C °C

Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability.

Recommended Operating Conditions (T

=25°C)

A

Parameter Symbol Min Max Unit

Supply Voltage VCC 4 24 V Operating T emperat ure TOP -40 150

°C

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Data Sheet

BIPOLAR HALL-EFFECT POSITION SENSORS AH41

Electrical Characteristics

V

=12V, TA =25°C, unless otherwise specified.

CC

Parameter Symbol Conditions Min Typ Max Unit

Supply Voltage VCC 4 24 V Supply Current ICC V Output Leakage Current IOL V Output Saturation Voltage V

I

SAT

Rise Time tr

Fall Time tf

=4V to 24V 6 9 mA

CC

=14V 0.1 10

CE

=20mA 110 300 mV

OUT

=820Ω

R

L

C

=20pF

L

=820Ω

R

L

C

=20pF

L

200

100

µA

ns

Magnetic Characteristics (T

Parameter Symbol Grade Min Typ Max Unit

Operating Point

Releasing Point

Hysteresis

B

OP

B

RP

B

HYS

=25°C)

A

A B A B

V

OUT

30 75

Gauss

5 105

-75 -30 Gauss

-105 -5 80 110 140 Gauss

High

Turn off

B

HYS

Turn on

V

SAT

Nov 2010 Rev. 1. 2 BCD Semiconductor Manufacturing Limited

B

RP

0

Magnetic Flux Density (Gauss)

B

OP

5

Low

SN

Data Sheet

BIPOLAR HALL-EFFECT POSITION SENSORS AH41

Test Circuit

V

S

Marking Side

CC

AH41

(Front View)

GND OUTPUTVCC

1

2 3

V

N

RL820Ω

C

L

20pF

OUT

Figure 4. Basic Test Circuit of AH41

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Data Sheet

BIPOLAR HALL-EFFECT POSITION SENSORS AH41

Typical Performance Characteristics

7

6

5

4

3

Supply Current (mA)

2

1

TA=25oC

10

8

6

4

Supply Current (mA)

2

VCC=12V

0

03691215182124

Supply Voltage(V)

Figure 5. Supply Current vs. Supply Voltage Figure 6. Supply Current vs. Ambient Temperature

0

-40 -20 0 20 40 60 80 100 120 140

Ambient Temperature (oC)

400

200

300

200

(Gauss)

100

HYS

/B

0

RP

/B

OP

B

-100

-200

-300 4 8 12 16 20 24

Supply Voltage (V)

B

OP

B

RP

B

HYS

150

100

(Gauss)

HYS

50

/B

RP

/B

OP

0

B

-50

-100

-40-200 20406080100120140

Ambient Temperature (oC)

B

OP

B

RP

B

HYS

Figure 7. BOP/BRP/B

vs. Supply Voltage Figure 8. BOP/BRP/B

HYS

vs. Ambient Temperature

HYS

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Data Sheet

BIPOLAR HALL-EFFECT POSITION SENSORS AH41

Typical Performance Characteristics (Continued)

200

150

100

Saturation Voltage (V)

50

0

-40-200 20406080100120140

Ambient Temperature (oC)

VCC=12V

I

=10mA

OUT

I

=20mA

OUT

Figure 9. Saturation Voltage vs. Ambient Temperature

Nov 2010 Rev. 1. 2 BCD Semiconductor Manufacturing Limited

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Data Sheet

BIPOLAR HALL-EFFECT POSITION SENSORS AH41

Mechanical Dimensions

TO-92S-3 Unit: mm(inch)

° °

Nov 2010 Rev. 1. 2 BCD Semiconductor Manufacturing Limited

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