A1146 Allegro MicroSystems, A1146 Datasheet - Page 5

• Manufacturer Part Number: A1146
• Description: (A1145 / A1146) Ultrasensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches
• Manufacturer: Allegro MicroSystems

A1145
A1146
THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information
Package Thermal Resistance
*Additional thermal information available on Allegro Web site.
Characteristic
and
Symbol
1900
1800
1700
1600
1500
1400
1300
1200
1100
1000
900
800
700
600
500
400
300
200
100
R
0
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
θJA
9
8
7
6
5
4
3
2
20
20
Power Dissipation versus Ambient Temperature
Ultrasensitive Two-Wire Chopper-Stabilized
40
40
Package LH, 1-layer PCB with copper limited to solder pads
Package LH, 2-layer PCB with 0.463 in.
connected by thermal vias
Package UA, 1-layer PCB with copper limited to solder pads
2-layer PCB, Package LH
(R
1-layer PCB, Package UA
1-layer PCB, Package LH
(R
(R
θJA
θJA
θJA
60
60
= 110 ºC/W)
= 165 ºC/W)
= 228 ºC/W)
Power Derating Curve
80
Temperature (°C)
80
Temperature (ºC)
100
100
120
Unipolar Hall Effect Switches
120
Test Conditions*
140
140
160
160
2
of copper area each side
180
180
V
115 Northeast Cutoff, Box 15036
V
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
CC(min)
CC(max)
Value Units
228
165
110
ºC/W
ºC/W
ºC/W
5