CL520/CL525
Fixed Constant-Current Linear LED Driver
Features
General Description
•
•
•
•
•
•
The CL520 and CL525 are fixed-current linear
regulators designed for driving LEDs at 20 mA and
25 mA, respectively. With a maximum rating of 90V,
these devices are able to withstand transients without
the need for additional transient protection circuitry.
The CL520/CL525 are ideally suited for applications
employing single or multiple LEDs.
20 mA ±10% Constant-Current Driver for CL520
25 mA ±10% Constant-Current Driver for CL525
1V Dropout
4.75V to 90V Supply Range
90V Maximum Rating for Transient Immunity
Temperature Compensated
The devices’ minimum dropout voltage of 1V
accommodates extra LEDs, permits lower supply
voltages and provides more efficient operation.
Applications
• Specialty Lighting
• Low-Voltage Signage
The CL520/CL525 are offered in TO-252 (D-PAK) and
TO-92 packages.
Package Types
3-lead TO-252 (D-PAK)
(Top view)
3-lead TO-92
(Top view)
GND
GND
VDD
GND
OUT
VDD
OUT
See Table 2-1 and Table 2-2 for pin information.
2018 Microchip Technology Inc.
DS20005805A-page 1
CL520/CL525
Functional Block Diagram
DS20005805A-page 2
2018 Microchip Technology Inc.
CL520/CL525
Typical Application Circuit
VIN
4.75 – 90V
100nF
IOUT
VDD
OUT
Control
CL520/CL525
GND
2018 Microchip Technology Inc.
DS20005805A-page 3
CL520/CL525
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings†
Supply Voltage, VDD ............................................................................................................................... –0.5V to +100V
Output Voltage, VOUT ............................................................................................................................ –0.5V to +100V
Junction Temperature, TJ .................................................................................................................... –40°C to +135°C
Storage Temperature, TS .................................................................................................................... –65°C to +150°C
† Notice: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the
device. This is a stress rating only, and functional operation of the device at those or any other conditions above those
indicated in the operational sections of this specification is not intended. Exposure to maximum rating conditions for
extended periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS
Electrical Specifications: All voltages with respect to GND pin
Parameter
Sym.
Min.
Typ.
Max.
Unit
Supply Voltage
VDD
4.75
—
90
V
Voltage at OUT Pin
VOUT
1
—
90
V
TJ
–40
—
+125
°C
CDD
100
—
—
nF
Operating Junction Temperature
VDD Bypass Capacitor
Note 1:
Conditions
Note 1
Thermal considerations may limit voltage to less than 90V.
DC ELECTRICAL CHARACTERISTICS
Electrical Specifications: Over normal recommended operating conditions unless otherwise specified. All voltages
with respect to GND pin.
Parameter
Sym.
Min.
Typ.
Max.
Unit
IDD
—
—
1
mA
18
20
22
mA
1V < VOUT < 90V
—
—
22
mA
VOUT < 1V
22.5
25
27.5
mA
1V < VOUT < 90V
—
—
27.5
mA
VOUT < 1V
Current into OUT Pin with VDD Pin Open IOUT(OFF)
—
—
10
µA
VDD = open
Voltage at VDD to Shut Off LED Current
VDD(OFF)
—
—
1
V
IOUT < 10 µA
VDD Applied On-Time
tON
—
—
100
µs
VDD Removed Off-Time
tOFF
—
—
100
µs
Current into VDD Pin
CL520
Current into OUT Pin
IOUT
CL525
DS20005805A-page 4
Conditions
2018 Microchip Technology Inc.
CL520/CL525
TEMPERATURE SPECIFICATIONS
Parameter
Sym.
Min.
Typ.
Max.
Unit
Operating Junction Temperature
TJ
–40
—
125
°C
Maximum Junction Temperature
TJ(ABSMAX)
—
—
+135
°C
TS
–65
—
+150
°C
3-lead TO-252 (D-PAK)
JA
—
81
—
°C/W Note 1
3-lead TO-92
JA
—
132
—
°C/W Note 1
Conditions
TEMPERATURE RANGE
Storage Temperature
PACKAGE THERMAL RESISTANCE
Note 1: Mounted on JEDEC test PCB (2s 2p)
Current
(Normalized to 25OC at VOUT = 1.0V)
IOUT vs. Temperature
1.02
1.00
VOUT = 90V, 100 ms, 10% duty pulse
VOUT = 1.0V
0.98
0.96
0.94
0.92
-40
-50
0
25
50
100
120
150
O
Junction Temperature ( C)
2018 Microchip Technology Inc.
DS20005805A-page 5
CL520/CL525
2.0
PIN DESCRIPTION
The pin details of CL520/CL525 3-lead TO-252
(D-PAK) and 3-lead TO-92 are listed in Table 2-1 and
Table 2-2, respectively. Refer to Package Types for
the location of pins.
TABLE 2-1:
TO-252 (D-PAK) PIN FUNCTION TABLE
Pin Number
Pin Name
1
VDD
Supply voltage. Bypass locally with a 100 nF capacitor to ground.
2
GND
Circuit common (not for external connection)
3
OUT
Constant-current output (sink)
4
GND
Circuit common
TABLE 2-2:
Description
TO-92 PIN FUNCTION TABLE
Pin Number
Pin Name
1
VDD
Supply voltage. Bypass locally with a 100 nF capacitor to ground.
2
OUT
Constant-current output (sink)
3
GND
Circuit common
DS20005805A-page 6
Description
2018 Microchip Technology Inc.
CL520/CL525
3.0
APPLICATION INFORMATION
3.1
CL520 Application Circuits
VIN
VIN
4.75 – 90V
100nF
(Note 1)
VDD
100nF
OUT (Note 2)
IOUT
VDD
20mA
OUT (Note 2)
Control
20mA
Control
GND
(Note 1)
GND
Note
1:
Single or multiple LED(s) depend on the VIN supply
voltage.
2:
Limit to pulse operation with suitable duty cycle at
high voltages across OUT and GND pins to keep the
device power dissipation and junction temperature
below the maximum limit. e.g., 10% duty cycle pulse
operation when the voltage across OUT and GND
pins is 90V.
FIGURE 3-1:
CL520 Switched LED.
VIN
VDD
VLED(TOTAL) + 4.75V ≤ VIN ≤ VLED(TOTAL) + 90V
ILED = IOUT + IDD
Note
1:
Single or multiple LED(s) depend on the VIN supply
voltage.
2:
Limit to pulse operation with suitable duty cycle at
high voltages across OUT and GND pins to keep the
device power dissipation and junction temperature
below the maximum limit. e.g., 10% duty cycle pulse
operation when the voltage across OUT and GND
pins is 90V.
FIGURE 3-3:
LEDs.
CL520 Ground-Referenced
(Note 1)
OUT (Note 2)
VDD
Control
20mA
GND
Note
1:
Single or multiple LED(s) depend on the VIN supply
voltage.
2:
Limit to pulse operation with suitable duty cycle at
high voltages across OUT and GND pins to keep the
device power dissipation and junction temperature
below the maximum limit. e.g., 10% duty cycle pulse
operation when the voltage across OUT and GND
pins is 90V.
FIGURE 3-2:
CL520 Separate LED
Supply (VOUT may be higher or lower than VDD.).
2018 Microchip Technology Inc.
DS20005805A-page 7
CL520/CL525
3.2
CL525 Application Circuits
VIN
VIN
4.75 – 90V
100nF
(Note 1)
VDD
100nF
IOUT
25mA
Control
OUT (Note 2)
VDD
OUT (Note 2)
25mA
Control
GND
(Note 1)
GND
Note
1:
Single or multiple LED(s) depend on the VIN supply
voltage.
2:
Limit to pulse operation with suitable duty cycle at
high voltages across OUT and GND pins to keep the
device power dissipation and junction temperature
below the maximum limit. e.g., 10% duty cycle pulse
operation when the voltage across OUT and GND
pins is 90V.
FIGURE 3-4:
CL525 Switched LED.
VLED(TOTAL) + 4.75V ≤ VIN ≤ VLED(TOTAL) + 90V
ILED = IOUT + IDD
Note
1:
Single or multiple LED(s) depend on the VIN supply
voltage.
2:
Limit to pulse operation with suitable duty cycle at
high voltages across OUT and GND pins to keep the
device power dissipation and junction temperature
below the maximum limit. e.g., 10% duty cycle pulse
operation when the voltage across OUT and GND
pins is 90V.
FIGURE 3-6:
LEDs.
CL525 Ground-Referenced
VIN
VDD
(Note 1)
VDD
OUT (Note 2)
25mA
Control
GND
Note
1:
Single or multiple LED(s) depend on the VIN supply
voltage.
2:
Limit to pulse operation with suitable duty cycle at
high voltages across OUT and GND pins to keep the
device power dissipation and junction temperature
below the maximum limit. e.g., 10% duty cycle pulse
operation when the voltage across OUT and GND
pins is 90V.
FIGURE 3-5:
CL525 Separate LED
Supply (VOUT may be higher or lower than VDD.).
DS20005805A-page 8
2018 Microchip Technology Inc.
CL520/CL525
4.0
PACKAGING INFORMATION
4.1
Package Marking Information
TO-252 (D-PAK)
XXXX
XXXXX e3
YYWWNNN
Example
CL
520K4 e3
1819534
CL
525K4 e3
1810321
3-lead TO-92
Example
Example
XXXXXX
XXXX e3
YWWNNN
CL520
N3 e3
814321
CL525
N3 e3
823567
Legend: XX...X
Y
YY
WW
NNN
e3
*
Note:
Example
Product Code or Customer-specific information
Year code (last digit of calendar year)
Year code (last 2 digits of calendar year)
Week code (week of January 1 is week ‘01’)
Alphanumeric traceability code
Pb-free JEDEC® designator for Matte Tin (Sn)
This package is Pb-free. The Pb-free JEDEC designator ( e3 )
can be found on the outer packaging for this package.
In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line, thus limiting the number of available
characters for product code or customer-specific information. Package may or
not include the corporate logo.
2018 Microchip Technology Inc.
DS20005805A-page 9
CL520/CL525
Note: For the most current package drawings, see the Microchip Packaging Specification at www.microchip.com/packaging.
DS20005805A-page 10
2018 Microchip Technology Inc.
CL520/CL525
Note: For the most current package drawings, see the Microchip Packaging Specification at www.microchip.com/packaging.
2018 Microchip Technology Inc.
DS20005805A-page 11
CL520/CL525
NOTES:
DS20005805A-page 12
2018 Microchip Technology Inc.
CL520/CL525
APPENDIX A:
REVISION HISTORY
Revision A (December 2018)
• Converted Supertex Doc# DSFP-CL520/CL525 to
Microchip DS20005805A
• Changed the maximum junction temperature in
the Absolute Maximum Ratings from 150°C to
135°C
• Changed the package marking format
• Made minor text changes throughout the document.
2018 Microchip Technology Inc.
DS20005805A-page 13
CL520/CL525
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, contact your local Microchip representative or sales office.
PART NO.
Device
XX
Package
Options
Devices:
Packages:
Environmental:
Media Types:
-
X
-
Environmental
X
Media Type
CL520
=
Fixed Constant-Current Linear LED Driver
CL525
=
Fixed Constant-Current Linear LED Driver
K4 =
3-lead TO-252 (DPAK)
N3 =
3-lead TO-92
G =
a) CL520K4-G:
Fixed Constant-Current Linear
LED Driver, 3-lead TO-252
(DPAK) Package, 2000/Reel
b) CL520N3-G:
Fixed Constant-Current Linear
LED Driver, 3-lead TO-92
Package,1000/Bag
c) CL525K4-G:
Fixed Constant-Current Linear
LED Driver, 3-lead TO-252
(DPAK) Package, 2000/Reel
d) CL525N3-G:
Fixed Constant-Current Linear
LED Driver, 3-lead TO-92
Package,1000/Bag
Lead (Pb)-free/RoHS-compliant Package
(blank)
=
2000/Reel for a K4 Package
(blank)
=
1000/Bag for an N3 Package
DS20005805A-page 14
Examples:
2018 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices:
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
•
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
•
Microchip is willing to work with the customer who is concerned about the integrity of their code.
•
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
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OTHERWISE, RELATED TO THE INFORMATION,
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© 2018, Microchip Technology Incorporated, All Rights Reserved.
ISBN: 978-1-5224-3978-3
== ISO/TS 16949 ==
2018 Microchip Technology Inc.
DS20005805A-page 15
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DS20005805A-page 16
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08/15/18
