E-CMOS EC4211 Constant current linear led driver Datasheet

Constant Current Linear LED Driver
EC4211
FEATURES
GENERAL DESCRIPTION
• Constant LED Current for Varying Input Voltage
The EC4211 is a constant current linear LED driver
for replace discrete solutions in AC/DC power
application (up to 265V). The device is to drive a
constant current of ±5% variation by an external
resistor for different LED strings. The solution
eliminates the need of individual components by
combining them into a single package, which
results in a significant reduction of both system cost
and board space. For higher current application,
multiple EC4211s can also be used in parallel such
as 40mA, 80mA or 160mA. The EC4211 is selfprotected against over temperature and over
current. Internal thermal foldback function regulates
LED driver current automatically to limit die
temperature during high power operation or high
ambient temperature conditions. These features
provide maximum system protection for the
demanding lighting applications. The EC4211 is
available in a space saving SOP-8L package,
DFN-8L package or TO252-5L package, and the
operating temperature is from –40°C to +125°C.
• Adjusted Current Operation
• Low Quiescent Current
• Simplifies Circuit and System Designs
• Compact Component Count
• Provided Higher Current by Parallel
• Temperature Compensated Constant Current
• Over Current Protection
• Over Temperature Protection
• LED Current Programmable Thermal Foldback
for thermal Protection
• SOP-8L Package or DFN-8L Package or
TO252-5L Package
APPLICATIONS
• LED Driver
• Lighting Applications
• Lamp Indicators
• Candle Light
• Low Cost solution
• Constant Current Source
TYPICAL APPLICATION CIRCUIT
Current
Set Point
RGAIN (Optional)
REXT
120Vac
60Hz
+
ILED<60mA
VLED(total)=120V
-
Fig. 1 Simplified Application Circuit
E-CMOS Corp. (www.ecmos.com.tw)
3D03N Rev. F003
Page 1of 8
Constant Current Linear LED Driver
EC4211
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
VIN Supply Voltage................................................... 500V
REXT, RGAIN Operation Voltages…................................ 6V
Operating Temperature………………… -40°C to +125°C
Storage Temperature…………………… -55°C to +150°C
Maximum Die Temperature………………………. +150°C
Lead Temperature……………………………….… +260°C
ESD HBM Voltage……………………………....…… 2.5kV
ESD MM Voltage……………………………………… 300V
3
RGAIN 1
VIN 2
NC 3
REXT 4
8 VLED RGAIN 1
Thermal
PAD
(SOP-8L)
7 VLED
VIN 2
6 VLED
NC 3
5 VLED
REXT 4
8 VLED
Thermal
PAD
DFN-8L
Thermal PAD
7 VLED
(TO252-5L)
6 VLED
5 VLED
1
2
3
4
5
REXT NC VLED VIN RGAIN
Note:
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.
Ordering Information
Part No.
Package Type
Marking Information
EC4211NNMHR
SOP-8L
EC4211
YYWW
LLLLLT
EC4211NNF2R
DFN-8L
EC4211
LLLLL
YYWWT
EC4211NNA5R
TO252-5L
EC4211
YYWW
LLLLLT
Remark
YYWW :Date Code
LLLLL:Lot No
T:internal tracking code
ELECTRICAL CHARACTERISTICS
TA = 25°C unless otherwise specified
PARAMETER
Electrical Characteristic
VIN
CONDITIONS
Operation Voltage
ILED
Current Regulation (Note 1)
ILED(MAX)
Maximum Current Regulation
IQ
VREF
VDROP(MAX)
Quiescent Current
Reference Voltage (Note 3)
Maximum Dropout Voltage (Note 4)
VIN=120Vdc, REXT=15Ω, VLED=100V
VIN=220Vdc, REXT=30Ω, VLED=200V
VDROP≦16V (Note 2)
VIN=20Vdc, REXT=Open
MIN
TYP
MAX
UNIT
15
38.16
19.16
40.17
20.17
265
42.18
21.18
60
V
mA
mA
mA
170
µA
V
V
170
0.6
VIN= 265Vac, REXT=30Ω, VLED=220V
Thermal Characteristic
△VREF(T)
TA
PD
VREF Temperature Coefficient
RΘJA
Thermal Resistance
TA=-40°C ~125°C
Operating Temperature
Total Power Dissipation (Operation)
0.01
-40
SOP-8L Package
DFN-8L Package
TO252-5L Package
125
1
75
33.2
68
Protection
OCP
Over Current Protection
150
OTP
Over Temperature Protection
150
TFP
Thermal Foldback Protection (Note 5)
90
Note:
1. ILED=0.6/REXT+IQ
2. VDROP=VIN-VLED-0.6, PD<1W (No heat sink)
3. VREF=V(REXT)-VLED
4. The current regulation is for a instantaneous AC line input current only, not to exceed thermal characteristics of package.
5. ILED(TFP)=ILED-V(RGAIN)/RGAIN
E-CMOS Corp. (www.ecmos.com.tw)
%/℃
℃
W
℃/W
℃/W
℃/W
mA
℃
℃
3D03N Rev. F003
Page 2of 8
Constant Current Linear LED Driver
EC4211
FUNCTION DIAGRAM
VIN
RGAIN
Control
Circuits
Protection
Circuits
REXT
VLED
Fig. 2 Detailed Block Diagram
PIN DESCRIPTIONS
TO252-5L Package
PIN
1
2
3
4
5
Symbol
REXT
NC
VLED
VIN
RGAIN
Description
An external resistor between REXT and VLED pin sets different current regulation for LED strings.
No internal mechanically connection. Leave this pin open.
The LED strings are connected from this pin to ground.
Input supply voltage.
Programmable thermal foldback protection for current regulation to limit die temperature during high power
operation or high ambient temperature conditions.
DFN-8L / SOP-8L Package
PIN
1
2
3
4
5, 6, 7, 8
Symbol
RGAIN
VIN
NC
REXT
VLED
Description
Programmable thermal foldback protection for current regulation to limit die temperature during high power
operation or high ambient temperature conditions.
Input supply voltage.
No internal mechanically connection. Leave this pin open.
An external resistor between REXT and VLED pin sets different current regulation for LED strings.
The LED strings are connected from these pins to ground.
E-CMOS Corp. (www.ecmos.com.tw)
3D03N Rev. F003
Page 3of 8
EC4211
Constant Current Linear LED Driver
ELECTRICAL CHARACTERISTICS (TA = 25°C, unless otherwise specified)
VREF vs. TEMPERATURE
0.620
22
VIN=16.5Vdc
REXT=30
RGAIN=Open
21.5
0.615
OUTPUT CURRENT (mA)
VIN=16.5Vdc
REXT=30
RGAIN=Open
0.610
0.605
0.600
0.595
21
20.5
20
19.5
19
18.5
0.590
-40
-25
-10
5
20
35
50
65
80
95
-40
110 125
-25
-10
5
VREF vs. INPUT VOLTAGE
0.7
20
35
50
65
80
95
110 125
TEMPERATURE (℃ )
TEMPERATURE (℃ )
OUTPUT CURRENT vs. REXT
100
90
0.6
80
0.5
70
REXT=30
RGAIN=Open
0.4
REXT(Ω)
VREF (V)
0.3
VIN=16.5Vdc
RGAIN=Open
60
50
40
30
0.2
20
0.1
10
0
0
0
10
20
30
40
INPUT VOLTAGE (V)
50
0
60
VIN=16.5Vdc
REXT=30
20
30
40
50
60
70
80
QUIESCENT CURRENT
vs. TEMPERATURE
200
RGAIN=20k
180
QUIESCENT CURRENT (uA)
20
15
RGAIN=10k
10
10
OUTPUT CURRENT (mA)
THERMAL FOLDBACK
vs. TEMPERATURE
25
OUTPUT CURRENT (mA)
VREF (V)
OUTPUT CURRENT
vs. TEMPERATURE
5
VIN=16.5Vdc
REXT=Open
RGAIN=Open
160
140
120
100
80
0
0
15
30
45
60
75
90
105
120
135
-40 -25
-10
5
20
35
50
65
80
95
110 125
TEMPERATURE (℃ )
TEMPERATURE (℃ )
E-CMOS Corp. (www.ecmos.com.tw)
3D03N Rev. F003
Page 4of 8
EC4211
Constant Current Linear LED Driver
ELECTRICAL CHARACTERISTICS (Continuted)
TRANSIENT RESPONSE
TRANSIENT RESPONSE
VIN=220Vac
REXT=24
RGAIN=Open
VIN=120Vac
REXT=10
RGAIN=Open
TRANSIENT RESPONSE
vs. THERMAL FOLDBACK
OVER CURRENT PROTECTION
VIN=130Vac
REXT=8.2
RGAIN=15k
VIN=60Vdc
REXT=Short
RGAIN=Open
OVER TEMPERATURE PROTECTION
VIN=130Vac
REXT=Short
RGAIN=Open
E-CMOS Corp. (www.ecmos.com.tw)
3D03N Rev. F003
Page 5of 8
EC4211
Constant Current Linear LED Driver
LED Lighting EC4211 Application Circuit Schematic
4
5
F1
AC
D1
1
Current
Set Point
REXT
RV1
RGAIN (Optional)
TO252-5
BR1
3
+
VLED
ILED
-
Fig. 3 Typical Application Circuit
110VAC 4W LED Lighting Demo Board Part List
COMPONENT
VALUE
PACKAGE
U1
BR1
F1
RV1
D1
REXT
RGAIN
VLED
EC4211
B10S
1A
221KD14 (140VAC)
1N4003
8.5
7.5k
120V
TO252-5L
SMD
DIP
DIP
DIP
0603
0603
NA
220VAC 4W LED Lighting Demo Board Part List
COMPONENT
VALUE
PACKAGE
U1
BR1
F1
RV1
D1
REXT
RGAIN
VLED
EC4211
B10S
1A
431KD14 (275VAC)
1N4003
24
7.5k
240V
TO252-5L
SMD
DIP
DIP
DIP
0603
0603
NA
Note:
1. RV1 is for Surge Protection.
2. D1 is for Hi-POT protection.
E-CMOS Corp. (www.ecmos.com.tw)
3D03N Rev. F003
Page 6of 8
Constant Current Linear LED Driver
EC4211
OUTLINE DIMENSIONS (Dimensions shown in millimeters)
TO252-5L Package
SOP-8L Package
E-CMOS Corp. (www.ecmos.com.tw)
3D03N Rev. F003
Page 7of 8
Constant Current Linear LED Driver
EC4211
DFN-8L Package
E-CMOS Corp. (www.ecmos.com.tw)
3D03N Rev. F003
Page 8of 8
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