Supertex inc.
Linear, Fixed Constant Current
LED Driver
Features
►
20mA ±10% constant current drive
►
1.0V dropout
►
90V rating for transient immunity
►
Temperature compensated
►
4.75 - 90V supply range
CL520
General Description
The
CL520 is a fixed, linear current regulator designed for
driving LEDs at 20mA. With a maximum rating of 90V, it is able
to withstand transients without the need for additional transient
protection circuitry. It is ideally suited for applications employing
single or multiple LEDs.
The minimum dropout voltage of 1.0V accomodates extra
LEDs, permits lower supply voltages, and provides more
efficient operation.
The CL520 is offered in TO-252(D-PAK) and TO-92 packages.
Applications
►
Specialty lighting
►
Low voltage signage
Typical Application Circuit
V
IN
4.75 – 90V
100nF
VDD
20mA
OUT
20mA
Control
CL520
GND
Doc.# DSFP-CL520
A052013
Supertex inc.
www.supertex.com
CL520
Ordering Information
Part Number
CL520K4-G
CL520N3-G
CL520N3-G P002
CL520N3-G P003
CL520N3-G P005
CL520N3-G P013
CL520N3-G P014
Package Options
TO-252 (D-PAK)
TO-92
TO-92
TO-92
TO-92
TO-92
TO-92
Packing
2000/Reel
1000/Bag
2000/Reel
2000/Reel
2000/Reel
2000/Reel
2000/Reel
OUT
VDD
GND
Pin Configurations
VDD
GND
OUT
TO-252 (D-PAK)
TO-92
-G denotes a lead (Pb)-free / RoHS compliant package
Refer to ‘P0xx’ Tape & Reel Specs for P002, P003, P005, P013, and P014
TO-92 Taping Specifications and Winding Styles
Product Marking
Si YYWW
CL520K4
LLLLLLL
YY = Year Sealed
WW = Week Sealed
L = Lot Number
= “Green” Packaging
Absolute Maximum Ratings
Parameter
Supply voltage, V
DD
Output voltage, V
OUT
Operating junction temperature
Storage temperature
Value
-0.5V to +100V
-0.5V to +100V
-40°C to +125°C
-65°C to +150°C
Package may or may not include the following marks: Si or
TO-252 (D-PAK)
Si
C L
5 2 0
YYWW
YY = Year Sealed
WW = Week Sealed
= “Green” Packaging
Absolute Maximum Ratings are those values beyond which damage to the
device may occur. Functional operation under these conditions is not implied.
Continuous operation of the device at the absolute rating level may affect
device reliability. All voltages are referenced to device ground..
Package may or may not include the following marks: Si or
TO-92
Typical Thermal Resistance
Package
TO-252 (D-PAK)
TO-92
θ
ja
81
O
C/W*
132
O
C/W*
* Mounted on JEDEC test PCB (2s 2p)
Recommended Operating Conditions
(all voltages with respect to GND pin)
Sym
V
DD
V
OUT
T
J
C
DD
Parameter
Supply voltage
Voltage at OUT pin
1
Junction temperature
V
DD
bypass capacitor
Min
4.75
1.0
-40
100
Typ
-
-
-
-
Max
90
90
125
-
Units
V
V
o
Conditions
---
---
---
C
nF
Doc.# DSFP-CL520
A052013
2
Supertex inc.
www.supertex.com
CL520
Electrical Characteristics
Sym
I
DD
I
OUT
I
OUT(OFF)
V
DD(OFF)
t
ON
t
OFF
Parameter
Current into VDD pin
Current into OUT pin
Current into OUT pin with VDD pin open
Voltage at VDD to shut off LED current
VDD applied on time
VDD removed off time
(Over recommended operating conditions. T
A
= 25
O
C unless otherwise specified.
All voltages with respect to GND pin)
Min
-
18
-
-
-
-
-
Typ
-
20
-
-
-
-
-
Max
1.0
22
22
10
1.0
100
100
Units Conditions
mA
mA
µA
V
µs
µs
---
1.0V < V
OUT
< 90V
V
OUT
<1.0V
V
DD
= open
I
OUT
< 10µA
---
---
Temperature Effects
Current
(Normalized to 25
O
C at V
OUT
= 1.0V)
1.02
1.00
0.98
V
OUT
= 90V, 100ms
V
OUT
= 1.0V
0.96
0.94
0.92
-40
-50
Junction Temperature (
O
C)
0
25
50
100
120
150
Application Circuits
Switched LED
V
IN
4.75 – 90V
100nF
VDD
Seperate LED Supply
V
DD
(V
OUT
may be higher or lower than V
DD
.)
I
OUT
OUT
20mA
V
IN
OUT
20mA
VDD
Control
Control
GND
GND
Doc.# DSFP-CL520
A052013
3
Supertex inc.
www.supertex.com
CL520
Application Circuits
Ground Referenced LEDs
V
IN
100nF
VDD
20mA
OUT
Control
V
LED
+ 4.75V ≤ V
IN
≤ V
LED
+ 90V
I
LED
= I
OUT
+ I
DD
GND
Pin Description
Pin #
TO-252
D-PAK
(K4)
1
3
4
TO-92
(N3)
1
2
3
Name
Description
Supply voltage for the CL520. Bypass locally with a 100nF capacitor to
ground.
Constant current output (sink).
Circuit common.
VDD
OUT
GND
Doc.# DSFP-CL520
A052013
4
Supertex inc.
www.supertex.com
CL520
3-Lead TO-252 D-PAK Package Outline (K4)
b3
E
E1
L3
θ1
D1
D
H
A
c2
4
1
2
3
Note 1
L4
L5
b2
View B
e
b
Front View
Rear View
Side View
Gauge
Plane
L2
θ
L
L1
A1
Seating
Plane
View B
Note:
1. Although 4 terminal locations are shown, only 3 are functional. Lead number 2 was removed.
Symbol
Dimen-
sion
(inches)
MIN
NOM
MAX
A
.086
-
.094
A1
.000*
-
.005
b
.025
-
.035
b2
.030
-
.045
b3
.195
-
.215
c2
.018
-
.035
D
.235
.240
.245
D1
.205
-
.217*
E
.250
-
.265
E1
.170
-
.182*
.090
BSC
e
H
.370
-
.410
L
.055
.060
.070
.108
REF
.020
BSC
L1
L2
L3
.035
-
.050
L4
.025*
-
.040
L5
.045
-
.060
θ
0
O
-
10
O
θ1
0
O
-
15
O
JEDEC Registration TO-252, Variation AA, Issue E, June 2004.
* This dimension is not specified in the JEDEC drawing.
Drawings not to scale.
Supertex Doc. #:
DSPD-3TO252K4, Version E041309.
Doc.# DSFP-CL520
A052013
5
Supertex inc.
www.supertex.com
ADI Reference Circuit
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