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W-52 Folha de dados(PDF) 3 Page - Copal Electronics

Nome de Peças W-52
Descrição Electrónicos  CMOS White LED Driver
Download  11 Pages
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Fabricante Electrônico  COPAL [Copal Electronics]
Página de início  http://www.nidec-copal-electronics.com/e
Logo COPAL - Copal Electronics

W-52 Folha de dados(HTML) 3 Page - Copal Electronics

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3
Table 2. ABSOLUTE MAXIMUM RATINGS
Parameter
Rating
Unit
VIN, LED, SHDN voltage
8
V
SW voltage
20
V
RSET voltage
1
V
Storage Temperature Range
65 to +150
C
Junction Temperature
125
C
Lead Soldering Temperature (10 secs)
300
C
ESD Rating – Human Body Model
2000
V
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
Table 3. RECOMMENDED OPERATING CONDITIONS
Parameter
Range
Unit
VIN
2to7
V
Ambient Temperature Range
40 to +85
C
Inductor L1
6.8 20% typical
H
Input Capacitor C1
4.7 20% typical
F
Output Capacitor C2
1.0 20% typical
F
ILED with 1 to 4 LEDs in series
0to20
mA
NOTE:
Typical application circuit with external components is shown on page 2.
Table 4. ELECTRICAL OPERATING CHARACTERISTICS
(Over recommended operating conditions unless otherwise specified. TA =25 C, VIN = 2 V and VSHDN = 1.2 V.)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
IQ
Quiescent Current
VRSET = 0.2 V
0.5
0.7
mA
IGND
Ground Current in Shutdown
VSHDN =0V
0.05
1
A
VLED
LED Pin Voltage
VIN <VOUT, ILED =15mA
120
180
mV
ILED
LED Current Adjust Range
5
40
mA
ILED
Programmed LED Current
RSET = 562
33
38
45
mA
RSET = 750
25
30
36
RSET = 1.5 k
12.5
15
17.5
RSET = 4.53 k
5
ILED
LED Pin Current Temperature Coefficient
ILED =15mA
0.01
mA/ C
VRSET
RSET Pin Voltage
RSET = 1.5 k
100
mV
Shutdown Pin Logic High Level
0.85
V
Shutdown Pin Logic Low Level
0.25
V
fSW
Boost Converter Frequency
0.8
1.2
1.6
MHz
ISWL
Switch Current Limit
400
550
780
mA
RSW
Switch Resistance
VIN =2V, ISW = 100 mA
0.7
1.2
VIN =3V, ISW = 100 mA
0.5
0.9
Switch Leakage Current
Switch Off, VSW =5V
0.01
5
A
Efficiency
Components shown on Figure 1
83
%


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