5

A1140-DS

Worcester, Massachusetts 01615-0036 (508) 853-5000

115 Northeast Cutoff, Box 15036

www.allegromicro.com

Allegro MicroSystems, Inc.

Sensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches

A1140/41/42/43

THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information

Characteristic

Symbol

Test Conditions

Min. Typ.

Max Units

Package Thermal Resistance

Package LH, minimum-K PCB (single-sided with

copper limited to solder pads)

110

–

–

ºC/W

Package LH, low-K PCB (double-sided with

228

–

–

ºC/W

Package UA, minimum-K PCB (single-sided with

copper limited to solder pads)

165

–

–

ºC/W

6

7

8

9

2

3

4

5

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

20

40

60

80

100

120

140

160

180

Power Derating Curve

Minimum-K PCB, Package LH

Low-K PCB, Package LH

Minimum-K PCB, Package UA

0

100

200

300

400

500

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

1700

1800

1900

20

40

60

80

100

120

140

160

180

Temperature (°C)

(R

65 ºC/W)

Minimum-K

PCB,

Package

UA

(R

θJA

= 228

ºC/W)

Minim

um-K

PCB,

Packa

ge LH

(R

110

ºC/W)

Low-K

PCB,

Pack

age

LH