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PDF AS1111 Data sheet ( Hoja de datos )
| Número de pieza | AS1111 | |
| Descripción | Low-Dropout LED Drivers | |
| Fabricantes | ams | |
| Logotipo |  |
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AS1111
Low–Dropout LED Drivers
General Description
The AS1111A/AS1111B/AS1111C are LED drivers designed to
match current source bias for any color LED, including white
and blue. The devices can drive up to 4 high-current LEDs, and
the LED current is programmable using an external resistor
(RSET).
The AS1111A LED currents are 460 x ISET (per LED, typ) at an LED
cathode voltage (VSAT) of 150mV and 650 x ISET (typ) at a VSAT
of 1V, where ISET is the current through RSET connected to pin
CTRL.
The AS1111B & AS1111C LED currents are
230 x ISET (per LED, typ) at a VSAT of 150mV and 325 x ISET (typ)
at a VSAT of 1V.
All AS1111 versions incorporate a chip-enable feature via pin
EN. When the devices are disabled, the supply current drops
down to less than 1μA. The AS1111A and AS1111B are available
in a 6-pin WL-CSP package with 0.4mm pitch. The AS1111C is
available in an 8-pin MLPD (2x2mm) package with 0.5mm pitch.
Ordering Information and Content Guide appear at end of
datasheet.
Figure 1:
Added Value of Using AS1111
Key Benefits & Features
The benefits and features of AS1111, Low–Dropout LED Drivers
are listed below:
High efficient
Benefits
Supports a variety of end applications
Extended battery life
Suitable for EMF sensitive environment
Small PCB area
Cost effective, small package
Features
• Ultra Low Voltage Drop: less than 150mV
• Analog and PWM Brightness Control
• Up to 80mA per LED (AS1111A)
• Up to 40mA per LED (AS1111B, AS1111C)
• Active-Low Shutdown Mode
• Low Shutdown Current: less than 1μA
• No electromagnetic interference
• No switching noise
• Less external components needed
• 6-pin WL-CSP with 0.4mm pitch
• 8-pin MLPD (2x2mm) with 0.5mm pitch
ams Datasheet
[v1-06] 2015-Apr-07
Page 1
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1 page  
AS1111 − Absolute Maximum Ratings
Absolute Maximum Ratings
Figure 5:
Absolute Maximum Ratings
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. These are stress
ratings only. Functional operation of the device at these or any
other conditions beyond those indicated under Electrical
Characteristics is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device
reliability.
Symbol
Parameter
Min Max Units
Comments
Electrical Parameters
Supply Voltage to
Ground
5V pins
Input Current
(latch-up immunity)
ESDHBM
Electrostatic Discharge
HBM
-0.3 5.0
V
Applicable for pins:
I1, I2, I3, I4, I1/I2, I3/I4, CTRL, EN
-100 100
mA Norm: JEDEC JESD78
Electrostatic Discharge
±2 kV Norm: JEDEC JESD22-A114F
TA
RTHJA (1)
Temperature Ranges and Storage Conditions
Operating Temperature -40
85
°C
Junction to Ambient
Thermal Resistance
60 °C/W MLPD
95 °C/W WL-CSP
TJ
TSTRG
Junction Temperature
Storage Temperature
Range
125
-55 125
°C WL-CSP
°C
TBODY
RHNC
MSL
Package Body
Temperature
Relative Humidity
non-condensing
Moisture Sensitivity
Level (WL-CSP & MLPD)
260
5 85
1
°C Norm: IPC/JEDEC J-STD-020 (2)
%
Represents an unlimited floor life
time
Note(s) and/or Footnote(s):
1. Junction-to-ambient thermal resistance is very dependent on application and board-layout. In situations where high maximum
power dissipation exists, special attention must be paid to thermal dissipation during board design.
2. The reflow peak soldering temperature (body temperature) is specified according to IPC/JEDEC J-STD-020 “Moisture/Reflow
Sensitivity Classification for Non-hermetic Solid State Surface Mount Devices.”
ams Datasheet
[v1-06] 2015-Apr-07
Page 5
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5 Page 
AS1111 − Typical Operating Characteristics
Figure 14:
LED Current vs. Temperature, VLED = -0.25V, ISET = 50μA
Figure 15:
LED Current vs. SET Current
ams Datasheet
[v1-06] 2015-Apr-07
Page 11
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| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet AS1111.PDF ] | |
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