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CAT32 Datasheet(PDF) 3 Page - Catalyst Semiconductor

No. de pieza CAT32
Descripción Electrónicos  CMOS White LED Driver
Download  14 Pages
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Fabricante Electrónico  CATALYST [Catalyst Semiconductor]
Página de inicio  http://www.catalyst-semiconductor.com
Logo CATALYST - Catalyst Semiconductor

CAT32 Datasheet(HTML) 3 Page - Catalyst Semiconductor

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CAT32
© Catalyst Semiconductor, Inc.
3
Doc. No. MD-5001 Rev. AD
Characteristics subject to change without notice
ABSOLUTE MAXIMUM RATINGS (1)
Parameter
Rating
Unit
VIN, LED, SHDN
¯¯¯¯¯ voltage
8
V
SW voltage
20
V
RSET voltage
1
V
Storage Temperature Range
-65 to +150
ºC
Junction Temperature
125
ºC
Lead Soldering Temperature (10 secs)
300
ºC
ESD Rating – Human Body Model
2000
V
RECOMMENDED OPERATING CONDITIONS
Parameter
Range
Unit
VIN
2 to 7
V
Ambient Temperature Range
-40 to +85
ºC
Inductor L1
6.8 ±20% typical
µH
Input Capacitor C1
4.7 ±20% typical
µF
Output Capacitor C2
1.0 ±20% typical
µF
ILED with 1 to 4 LEDs in series
0 to 20
mA
Typical application circuit with external components is shown on page 1.
ELECTRICAL OPERATING CHARACTERISTICS
Over recommended operating conditions unless otherwise specified. TA = 25ºC, VIN = 2V and V SHDN
¯¯¯¯¯ = 1.2V.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
IQ
Quiescent Current
VRSET = 0.2V
0.5
0.7
mA
IGND
Ground Current in Shutdown
VSHDN
¯¯¯¯¯ = 0V
0.05
1
µA
VLED
LED Pin Voltage
VIN < VOUT, ILED =15mA
120
180
mV
ILED
LED Current Adjust Range
5
40
mA
RSET = 562Ω
33
38
45
RSET = 750Ω
25
30
36
RSET = 1.5kΩ
12.5
15
17.5
ILED
Programmed LED Current
RSET = 4.53kΩ
5
mA
ILED
LED Pin Current Temperature Coefficient
ILED = 15mA
-0.01
mA/°C
VRSET
RSET Pin Voltage
RSET = 1.5kΩ
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
VIN = 2V, ISW = 100mA
0.7
1.2
RSW
Switch Resistance
VIN = 3V, ISW = 100mA
0.5
0.9
Switch Leakage Current
Switch Off, VSW = 5V
0.01
5
µA
Efficiency
Components shown on
Figure 1
83
%
Notes:
(1) These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods
may affect device reliability. All voltages are with respect to ground.


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