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Myalarm V-LED1 Manual de usuario Pagina 2

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MAX1916
Low-Dropout, Constant-Current
Triple White LED Bias Supply
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond 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 in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Note 1: Limits are 100% production tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed through
correlation using statistical quality control (SQC) methods.
Note 2: Dropout Voltage is defined as the LED_ to GND voltage at which current sink into LED_ drops 20% from the value at
V
LED
= 1V.
Note 3: Dropout Voltage is defined as the LED_ to GND voltage at which current sink into LED_ drops 10% from the value at
V
LED
= 1V.
EN, SET, LED1, LED2, LED3 to GND ..................... -0.3V to +6V
Continuous Power Dissipation (T
A
= +70°C)
6-Pin Thin SOT23 (derate 9.1mW/°C above +70°C) ... 727mW
Operating Temperature Range ......................... -40°C to +85°C
Storage Temperature Range ........................... -65°C to +150°C
Lead Temperature (soldering, 10s)................................... 300°C
ELECTRICAL CHARACTERISTICS
(V
EN
= 3.3V, V
LED1
= V
LED2
= V
LED3
= 1V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Voltage Range V
EN
EN is the power-supply input 2.5 5.5 V
V
EN
rising 2.2 2.47 V
Undervoltage Lockout
Threshold
V
UVLO
Hysteresis 85 mV
SET Input Current Range I
SET
5 260 µA
SET to LED_ Current Ratio I
LED
/I
SET
, I
SET
= 42µA 207 230 253 A/A
SET Bias Voltage V
SET
I
SET
= 42µA 1.154 1.215 1.276 V
T
A
= -40°C to +25°C 0.01 1
SET Leakage Current
in Shutdown
EN = GND,
V
SET
= 3.3V
T
A
= -40°C to +85°C5
µA
LED_-to-LED_ Current Matching I
SET
= 42µA0.35%
Maximum LED_ Sink Current I
LED
_
Each LED_ 60 mA
I
SET
= 22µA (Note 2) 100 180
I
SET
= 42µA (Note 3) 200 360
LED_ Dropout Voltage
I
SET
= 84µA (Note 3) 230 410
mV
LED_ Leakage Current
in Shutdown
V
LED1
= V
LED2
=
V
LED3
= 5.5V, EN =
GND, each LED_
T
A
= +25°C 0.01 1 µA
Input High Voltage V
IH
V
EN
> V
IH
for enable 2.5
Input Low Voltage V
IL
V
EN
< V
IL
for disable 2.2
V
V
EN
= 2.5V to 5.5V, EN is the power-supply
input
40 100
EN Input Bias Current I
EN
V
EN
= 0.4V T
A
= +25°C 0.05 1
µA
Thermal Shutdown Temperature 170 °C
Thermal Shutdown Hysteresis 10 °C
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