a6260slj-t Allegro MicroSystems, Inc., a6260slj-t Datasheet - Page 8

• Manufacturer Part Number: a6260slj-t
• Description: High Brightness Led Current Regulator
• Manufacturer: Allegro MicroSystems, Inc.

A6260
example, with R
Figure 3 shows how the nominal value of the thermal monitor
activation temperature varies with the voltage at THTH and with
a pull-down resistor, R
to 5V.
In extreme cases, if the chip temperature exceeds the overtem-
perature limit, T
will be disabled. The temperature will continue to be monitored
and the output re-activated when the temperature drops below the
threshold provided by the specified hysteresis, T
V
THTH
JF
TH
, both the sink regulator and the source switch
connected to 5 V, V
=
1
TH
.
124
, to GND or with a pull-up resistor, R
+
(
V
R
−
1
.
124
THTH
)
×
will be:
5
+
R
5
Jhys
TH
.
High Brightness LED Current Regulator
(4)
TH
,
Figure 3. T
300
250
200
150
100
50
0
50
JM
R
versus R
TH
pull-up to 5 V
70
TH
(pull-up or –down), and V
90
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
T
R
JM
TH
(°C)
pull-down to GND
110
THTH
130
150
1.4
1.3
1.2
1.1
1.0
0.9
0.8
8