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AS1101 PDF 데이터시트 ( Data , Function )

부품번호 AS1101 기능
기능 (AS1101 - AS1104) Low-Dropout LED Drivers
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AS1101 데이터시트, 핀배열, 회로
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austriamicrosystems
AS1101, AS1102, AS1103, AS1104
Low-Dropout LED Drivers
Data Sheet
1 General Description
2 Key Features
The AS110x family are LED drivers providing matched
! LED Drivers for Parallel-Connected LEDs
current source bias for any color LED, including white
and blue. LED current is programmable using an exter-
nal resistor.
! Ultra-Low Voltage Drop: Less Than 150mV (for Li-
ion Battery Support)
! Analog and PWM Brightness Control
The AS1101 LED currents are typical 460 x ISET (per
LED) at an LED cathode voltage of 150mV and typical
650 x ISET at an LED cathode voltage of 1V.
! Up to 80mA per LED (AS1101)
! Up to 40mA per LED (AS1102, AS1103, AS1104)
! No Electromagnetic Interference, No Switching-
The AS1102, AS1103, and AS1104 LED currents are
Noise
typical 230 x ISET (per LED) at an LED cathode voltage
of 150mV and typical 325 x ISET at an LED cathode volt-
age of 1V where ISET is the current through the external
resistor connected to the CTRL pin.
! Current-Matching Requires No External Compo-
nents
! Active-Low Shutdown Mode (AS1101, AS1102,
and AS1103)
The AS110x family can drive up to 4 high-current LEDs.
! Low Shutdown-Current: Less Than 1µA
The AS1101, AS1102, and AS1104 incorporate a chip-
enable feature via pin ON. When the devices are dis-
abled, the supply current drops to less than 1µA.
The devices are pin-to-pin compatible to the FAN5611,
FAN5612 and FAN5614.
! SC70-6 Package (AS1101, AS1102, and AS1103)
! MSOP-8 Package (AS1104)
! Pin-to-Pin Compatible to FAN5611, FAN5612, and
FAN5614
The AS1101, AS1102, and AS1103 are available in a
3 Applications
6-pin SC70 package; the AS1104 is available in aD8a-tpainSheet4U.com
MSOP package.
The AS110x devices are ideal for LED displays and key-
board backlights, as well as lighting management units
for battery powered audio devices such as MP3 and CD
players, mobile and cordless phones, PDAs, portable
DVD players, and consumer electronics.
Figure 1. Typical Application Diagrams
DataShee
2 Diode Control with On/Off
VIN
3 Diode Control with On/Off
VIN
VSET(3V)
ENABLE
ISET
RSET
I1/I2 I3/I4
CTRL AS1101
ON GND
VSET(3V)
ENABLE
ISET
RSET
I3 I2 I1
CTRL AS1102
ON GND
4 Diode Control
VIN
VSET(3V)
ISET
RSET
I4 I3 I2
CTRL AS1103
GND
I1
4 Diode Control with On/Off
VIN
VSET(3V)
ENABLE
ISET
RSET
I4 I3 I2
CTRL AS1104
ON GND
I1
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AS1101 pdf, 반도체, 판매, 대치품
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AS1101, AS1102, AS1103, AS1104
Data Sheet
austriamicrosystems
Electrical Characteristics – AS1102, AS1103, AS1104
et4U.com
5.2 Electrical Characteristics – AS1102, AS1103, AS1104
Conditions: TAMB = 25°C (unless otherwise noted).
Table 4. Electrical Characteristics – AS1102, AS1103, AS1104
Parameter
Symbol
Conditions
Min Typ Max Units
ISET Range
ISET
VON = 3V
25 150 µA
Output Current Multiplication Ratio OCMR ISET = 25µA, VSAT = 150mV, VON = 3V 175 250 325
Output Current Multiplication Ratio OCMR ISET = 40µA, VSAT = 150mV, VON = 3V 170 240 310
Output Current Multiplication Ratio OCMR ISET = 75µA, VSAT = 150mV, VON = 3V 145 210 275
Output Current Multiplication Ratio OCMR ISET = 25µA, VSAT = 600mV, VON = 3V 215 310 405
Output Current Multiplication Ratio OCMR ISET = 40µA, VSAT = 600mV, VON = 3V 215 305 395
Output Current Multiplication Ratio OCMR ISET = 75µA, VSAT = 600mV, VON = 3V 205 295 385
Output Current Multiplication Ratio OCMR ISET = 25µA, VSAT = 1000mV, VON = 3V 235 335 435
Output Current Multiplication Ratio OCMR ISET = 40µA, VSAT = 1000mV, VON = 3V 230 330 430
Output Current Multiplication Ratio OCMR ISET = 75µA, VSAT = 1000mV, VON = 3V 220 315 410
LED-to-LED Current Matching Match
VON = 3V
-3 3 %
ISET in OFF Mode 1
ISET,OFF
VCTRL = 3V, VSAT = 3V, VON = 0V
0.1 1 µA
IIN in OFF Mode 2
IIN,OFF
VCTRL = 3V, VSAT = 3V, VON = 0V,
DataSheet4UT.AcMoBm= 25°C
VCTRL = 3V, VSAT = 3V, VON = 0V
0.1 1
µA
2
Peak Efficiency 3
EFF
VIN = 3V, VON = 3V
95
%
1. Not applicable to AS1103.
2. Not applicable to AS1103.
3. Efficiency = (VIN - VSAT) / VIN. Information parameter, guaranteed by design.
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AS1101 전자부품, 판매, 대치품
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AS1101, AS1102, AS1103, AS1104
Data Sheet
7 Application Information
Figure 4. Typical Application Diagrams
2 Diode Control with On/Off
VIN
VSET(3V)
ENABLE
ISET
RSET
I1/I2 I3/I4
CTRL AS1101
ON GND
austriamicrosystems
3 Diode Control with On/Off
VIN
VSET(3V)
ENABLE
ISET
RSET
I3
CTRL
ON
I2 I1
AS1102
GND
4 Diode Control
VIN
VSET(3V)
ISET
RSET
I4
CTRL
I3 I2 I1
AS1103
GND
4 Diode Control with On/Off
VIN
VSET(3V)
ENABLE
ISET
RSET
I4
CTRL
ON
I3 I2 I1
AS1104
GND
et4U.com
Figure 5. Performance Characteristics
DataSheet4U.com
90
80
70
60
50
40
30
20
10
0
0
AS1101 ILED vs ISET
20 40 60 80 100 120 140 160
ISET (µA)
45
40
35
30
25
20
15
10
5
0
0
AS1102 - AS1104 ILED vs ISET
20 40 60 80 100 120 140 160
ISET (µA)
AS1101 vs Res is tor
60
50
AS1101
40
30
20
Resistor
10
0
3.0
3.5
4.0
VIN (V)
4.5
DataSheet4U.com
5.0
AS1102 - AS1104 ILED vs VIN
60
50
LED Type 1
40
LED Type 2
30
20
10
0
3.0
3.5 4.0
VIN (V)
4.5
5.0
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