CL320/CL325/CL330
3-Channel Linear LED Drivers
Features
• ±6% Current Accuracy when V
OUT
is between 4V
and 15V
• 90V Standoff Voltage
• Separate Enable Pins for each Channel for PWM
Dimming
• Overtemperature Protection
• 8-Lead SOIC (with Heat Slug) Package
General Description
The CL320/CL325/CL330 are designed to drive three
strings of LEDs at a constant current of 20 mA, 25 mA
and 30 mA, respectively.
The drive current is fixed, with a ±6% tolerance over a
V
OUT
range of 4V to 15V. Separate enable pins for
each channel allow for PWM dimming, three-step linear
dimming or individual disconnection of faulty LED
strings.
Overtemperature protection circuitry shuts down all
three channels when the nominal die temperature
reaches 135°C. Normal operation resumes when the
die temperature drops by 30°C.
The CL320/CL325/CL330 are available in the 8-lead
SOIC (with heat slug) package and require a single
ceramic bypass capacitor which may be shared among
several drivers.
Applications
• LCD Backlighting
• Indicator Lamps
Package Type
8-lead SOIC
with heat slug
(Top view)
OUT3
OUT2
OUT1
VIN
GND
Underside plate
is ground
EN3
EN2
EN1
See
Table 2-1
for pin information.
2017 Microchip Technology Inc.
DS20005599A-page 1
CL320/CL325/CL330
Functional Block Diagram and Typical Application Circuit
6.5 - 90V
C
IN
100 nF
8
7
6
5
VIN
OUT1
V
DD
OUT2
OUT3
REG
Host
Controller
1
2
3
EN1
EN2
EN3
GND
4
CL320/CL325/CL330
DS20005599A-page 2
2017 Microchip Technology Inc.
CL320/CL325/CL330
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings†
Supply Voltage, V
IN
................................................................................................................................ –0.5V to +100V
Output Voltage, V
OUT
.............................................................................................................................–0.5V to +100V
Enable Voltage, V
EN
................................................................................................................................. –0.5V to +6.5V
Minimum Operating Junction Temperature, T
J
(Note
1)
.......................................................................................–40°C
Storage Temperature, T
S
.....................................................................................................................–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.
Note 1:
Maximum junction temperature internally limited
RECOMMENDED OPERATING CONDITIONS
Electrical Specifications:
All voltages with respect to GND pin
Parameter
Supply Voltage
Output Voltage
Enable Toggling Frequency
Operating Junction
Temperature
V
IN
Capacitor
Sym.
V
IN
V
OUT
f
EN
T
J
C
IN
Min.
6.5
4
0
–40
—
Typ.
—
—
—
—
100
Max.
90
15
90
100
—
—
Unit
V
V
kHz
°C
nF
EN = 0
EN = 1
Conditions
ELECTRICAL CHARACTERISTICS
Electrical Specifications:
Over recommended operating conditions. T
A
= 25°C unless otherwise noted.
Parameter
V
IN
Supply Current
Output Current, Off
CL320
Sym.
I
IN
I
OUT(OFF)
Min.
—
—
—
—
18.8
18
—
Output Current, On
CL325
I
OUT(ON)
23.5
22.5
—
CL330
28.2
27
Enable Voltage, On
Enable Voltage, Off
Enable Input Capacitance
V
EN(ON)
V
EN(OFF)
C
EN
—
2.4
—
Typ.
220
2.2
4
—
20
20
—
25
25
—
30
30
—
—
5
Max.
250
2.3
10
21.2
21.2
22
26.5
26.5
27.5
31.8
31.8
33
0.8
—
10
V
V
pF
mA
Unit
µA
mA
µA
EN
1-3
= 1
EN
1-3
= 0
EN
X
= 1
EN
X
= 0, V
OUT
= 0V–4V
EN
X
= 0, V
OUT
= 4V–15V
EN
X
= 0, V
OUT
= 15V–90V
EN
X
= 0, V
OUT
= 0V–4V
EN
X
= 0, V
OUT
= 4V–15V
EN
X
= 0, V
OUT
= 15V–90V
EN
X
= 0, V
OUT
= 0V–4V
EN
X
= 0, V
OUT
= 4V–15V
EN
X
= 0, V
OUT
= 15V–90V
Conditions
2017 Microchip Technology Inc.
DS20005599A-page 3
CL320/CL325/CL330
ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Specifications:
Over recommended operating conditions. T
A
= 25°C unless otherwise noted.
Parameter
Enable Low Input Current
Enable High Input Current
Enable on Delay
Output Current Rise Time
Enable Off Delay
Output Current Fall Time
Sym.
I
ENL
I
ENH
t
ON
t
RISE
t
OFF
t
FALL
Min.
—
—
—
—
—
—
Typ.
—
—
2
1
440
170
Max.
1
1
2.4
1.2
800
250
Unit
µA
µA
µs
µs
ns
ns
V
EN
= 0V
V
EN
= 5V
Conditions
TEMPERATURE SPECIFICATIONS
Parameter
TEMPERATURE RANGE
Operating Junction Temperature
Storage Temperature
Overtemperature Limit
Overtemperature Hysteresis
PACKAGE THERMAL RESISTANCE
8-lead SOIC (with heat slug)
Note 1:
JA
—
84
—
°C/W
Note 1
Mounted on JEDEC test PCB (2s 2p)
T
J
T
S
T
LIM
T
HYST
–40
–65
+120
—
—
—
+135
30
—
+150
+150
—
°C
°C
°C
°C
Sym.
Min.
Typ.
Max.
Unit
Conditions
DS20005599A-page 4
2017 Microchip Technology Inc.
CL320/CL325/CL330
Timing Waveforms
V
EN(OFF)
V
EN(ON)
t
ON
t
RISE
90%
IOUT
10%
I
OUT(ON)
I
OUT(ON)
90%
10%
t
OFF
t
FALL
EN
Temperature Effects
1.05
Current (normalized to 25
O
C)
1.00
0.95
0.90
0.85
0.80
-50
-40
0
25
50
100
120
O
150
Junction Temperature ( C)
2017 Microchip Technology Inc.
DS20005599A-page 5
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