KC24RT Series
CONSTANT CURRENT GREAT POWER LED DRIVER
FEATURES
l
SMD Package, simple and
convenient
l
High efficiency up to 96%
l
Ultra wide range voltage input and
output
l
Constant current mode, great power
output
l
AC-DC, EMC recommended circuit
l
PWM dimming & Analogue dimming
l
Remote ON/OFF, Continuous short
circuit protection
l
RoHS and UL Compliance
RoHS
PRODUCT PROGRAM
Input Voltage(V)
Model
Normal
KC24RT-300
KC24RT-350
KC24RT-500
KC24RT-600
KC24RT-700
24
24
24
24
24
Range
5.5-48
5.5-48
5.5-48
5.5-48
5.5-48
Voltage
(VDC)
3.3-36
3.3-36
3.3-36
3.3-36
3.3-36
Current
(mA)
0-300
0-350
0-500
0-600
0-700
Output
Dimming
control
PWM+Analogue
PWM+Analogue
PWM+Analogue
PWM+Analogue
PWM+Analogue
Efficiency
(%)
96
96
96
96
96
SPECIFICATIONS
Item
Utmost input voltage
Recommended input voltage
Input filter
Output voltage range
Input-Output voltage drop
Output current range
Output current accuracy
Output current stability
Internal power dissipation
Temperature coefficient
Efficiency at full load
Ripple & Noise (Vp-p)
Short circuit protection
Operating temperature range
300mA / 350mA
500mA/ 600mA/ 700mA
Test condition
≤10
seconds
Min.
5
5.5
Max.
55
24
48
Capacitor(1μF)
36
4
±
2
Vin=48V, Vo=3.3V~36V
Vin=24V,5LEDS
-40
°C
to+71
°C
ambient
±5
±1
700
±
0.015
96
120
Typ.
Units
VDC
APPLICATIONS
The KC24RT is a series of step-down
constant current source designed for driving
high power LEDs. It features high efficiency,
wide input voltage range, high operating
temperature, PWM and analogue dimming,
remote ON/OFF control, and SMD package
which facilitates the installation. It is widely
used in LED illumination areas such as
decorative
backlight,
light,
special
control
light,
commercial
light,
streetlight,
Vin=48V
3.3
Vin=5.5~48V,1~10LEDs
2
See the product program
VDC
%
mW
%/°C
%
mV
Continuous,
automatic recovery
-40
-40
-55
85
71
125
100
in-house light and car light, etc.
MODEL SELECTION
KC24RT-350
O u tp u t C u rre n t
P ac ka g e S tyl e
In p u t Vo l ta g e
P rod u ct S eri e s
Storage temperature range
Maximum case temperature
Maximum capacitive Load
Operating frequency range
MTBF
MIL-HDBK-217F(+25°C)
Case Material
Dimensions
Weight
PWM Dimming and ON/OFF Control (leave open if not used)
ON
Remote ON/OFF
OFF(shutdown)
Remote pin current
Vc=5V
Vin=24V, V
c
<0.6V
Quiescent input current
(shutdown)
PWM frequency
°C
1000
μF
320
370
420 kHz
2,000,000
Hours
Epoxy Resin (UL94-V0)
23.86*18.10*8.00
mm
6
g
Open or 2.8V<Vc<6V
Vc<0.6V
1
mA
400
μA
200
Hz
MORNSUN Science & Technology Co.,Ltd.
Address: No. 5, Kehui St. 1, Kehui
development center, Science Ave.,
Guangzhou Science City, Luogang
district, Guangzhou,P.R.China.
Tel: 86-20-38601850
Fax:86-20-38601272
E-mail:
info@mornsun.cn
Http://www.mornsun-power.com
Analogue dimming (leave open if not used)
Input voltage range
Vin=5.5-48V
0-15V
Output current range
Vin=5.5-48V
0%-100%
Full on
0.2V±50mV
Control voltage range
Full off
4.5V±200mV
Driving current
Vc=5V
0.6mA(max)
EMC
EMI conducted
EN55015 power port ( Refer to Figure 6)
RFI conducted
EN55015 CISPR22 class B ( Refer to Figure 6)
ESD
IEC/EN 61000-4-2 level 2 contact
±4KV
perf. Criteria B ( Refer to Figure 6)
R/S
IEC/EN 61000-4-3 level 3 (10V/m)
perf. Criteria A
EFT
IEC/EN 61000-4-4 level 2 (±1KV)
perf. Criteria B ( Refer to Figure 6)
Surge
IEC/EN 61000-4-5 level 2 (±1KV)
perf. Criteria B ( Refer to Figure 6)
C/S
IEC/EN 61000-4-6 level 3 (10Vr.ms)
perf. Criteria A
Specifications subject to change without notice.
KC24RT -XXX
2012.02.26-A/4
Page 1 of 5
The copyright and authority for the interpretation of the products are reserved by
MORNSUN
INPUT VS OUTPUT
Input
voltage
(VDC)
48
36
24
20
15
12
5.5
48
36
24
20
15
12
5.5
48
36
24
20
15
12
5.5
Output
voltage
range(VDC)
3.3-36.0
3.3-32.0
3.3-21.0
3.3-17.0
3.3-13.2
3.3-10.0
3.3-4.0
3.3-36.0
3.3-32.0
3.3-21.0
3.3-17.0
3.3-13.2
3.3-10.0
3.3-4.0
3.3-36.0
3.3-32.0
3.3-21.0
3.3-17.0
3.3-13.2
3.3-10.0
3.3-4.0
Output
constant
current (mA)
300
300
300
300
300
300
300
500
500
500
500
500
500
500
700
700
700
700
700
700
700
Output
power
(W Max)
10.80
9.60
6.30
5.10
3.96
3.00
1.20
18.00
16.00
10.50
8.50
6.60
5.00
2.00
25.20
22.40
14.70
11.90
9.24
7.00
2.80
Input
voltage
(VDC)
48
36
24
20
15
12
5.5
48
36
24
20
15
12
5.5
Output voltage
range(VDC)
3.3-36.0
3.3-32.0
3.3-21.0
3.3-17.0
3.3-13.2
3.3-10.0
3.3-4.0
3.3-36.0
3.3-32.0
3.3-21.0
3.3-17.0
3.3-13.2
3.3-10.0
3.3-4.0
Output constant current (mA)
350
350
350
350
350
350
350
600
600
600
600
600
600
600
Output power
(W Max)
12.60
11.20
7.35
5.95
4.62
3.50
1.40
21.60
19.20
12.60
10.20
7.92
6.00
2.40
TYPICAL APPLICATION CIRCUITS
(Analogue D im)
(Analogue Dim)
16
10
10
+Vi n
GND
16
9
+Vout
+Vin
9
+Vout
KC24RT-XXX
1
7
Last LED
KC24RT-XXX
8
-Vout 1st LED
GND
1
7
(PWM Dim/ON/OFF)
8
-Vout
1st LED
Last LED
(PWM D im/ ON /OFF)
(Figure 1)
Figure 2.
Series Application
(Figure 2) Parallel-series Application
If it is necessary to protect LED in actual application, you could connect a PTC to the input of every channel or all channels, as shown in
Note: The negative output terminal can’t connect GND, or the module may be damaged.
DIGITAL DIMMING CONTROL
PWM Digital Control Signal
1
0
Output Current
1
0
1
0
Output Current(LED appears bright)
1
0
PWM Digital Control Signal
1
0
Output Current(LED appears dim)
PWM Digital Control Signal
For the rated frequency PWM dimming, the output current of driver matters to the pulse width of the PWM signal, and the numerate please refer to
the following formula:
I
o_set
=
(DT-0.6)
T
I
o_norm
Io_set refers to the expected output current value.
Io_norm refers to the rated output current
D refers to the pulse width of the PWM signal
T refers to the cycle of the PWM signal
Note: The formula only supplies as a reference, and the output current may be a little deviation with different load. The Ton(min) of PWM signal
must be greater than 0.7ms, or the driver can’t be operated normally. It is natural for the driver to generate an audibly noise in dimming
process, because the frequency of the control circuit is within human audibly range (20Hz~20KHz). In order to avoid the human eye can
observe the LED flashes, the PWM dimming frequency is recommended to set above 100Hz.
The copyright and authority for the interpretation of the products are reserved by
MORNSUN
Specifications subject to change without notice.
KC24RT -XXX
2012.02.26-A/4
Page 2 of 5
ANALOGUE DIMMING CONTROL AND APPLICATION EXAMPLE
16
1
5K1
KC24RT-XXX
8
10
7
Last LED
Analogue dimming circuit
GND
0-10V
On/Off
(Optional)
1st LED
5K6
Output Current
+Vin
9
100%
Analogue Input Voltage
0%
0.2V
1V
2V
3V
4V
5V
15V
Voltage Control(0-15V max)
(Figure 3)
(Figure 4) Analogue input voltage VS output
EMC RECOMMENDED CIRCUIT
( An a lo g u e D im)
1.25mH
+
SMCG51
+Vin
470
μ
F
16
1.0
μ
F
10
9
+Vout
2.2
μ
F
KC24RT-XXX
1
7
1.0
μ
F
GND
8
-Vout
1st LED
(P W M Dim /O N /O FF)
(Figure 5) EMI/RFI conducted EN55022 recommended circuit
LCM
Last LED
+
Vin
Tvs
C0
C1
C2
DIM
*
R1
VIN
VO +
+Vout
Load
KC24RT
DIM
C3
GND
GND
VO-
-Vout
1
Note:
1. DIM pin is the module’s PWM dimming pin as shown in Figure 6.
2. While adding circuit
②
,it may extend the PWM dimming output reaction time.
EMI/EMC standard：
Item
EMI
conducted
ESD
Surge
EFT
Standard
EN 55015
IEC
61000-4-2:2001
IEC
61000-4-5:2004
IEC
61000-4-4:2004
Level
Power
port
Level 2
Level 2
Level 2
Predicate
Qualification
B
B
B
Remark
Add external circuit
①
±4KV
Add external circuit
②
±1KV
Add external circuit
①
±1KV
Add external circuit
①
2
(Figure 6) EMI/EMC recommended circuit
Recommended parameter：
Components
Tvs
LCM
C0
C1
C2
C3
R1
Specifications
SMCJ48A,1500W（Bringtking）
6.8μH
CD43（CEAIYA）
470μF/50V（CapXon）
4.7μF/50V
2.2μF/50V
470pF/100V
1210 (TORCH)
1210 (TORCH)
0805 (TORCH)
680Ω 0805(can replaced by
inductance or magnetic bead)
The copyright and authority for the interpretation of the products are reserved by
MORNSUN
Specifications subject to change without notice.
KC24RT -XXX
2012.02.26-A/4
Page 3 of 5
AC INPUT RECOMMENDED CIRCUIT
(Analogue Dim)
10
AC IN
5VAC
~
32VAC
0.1
μ
F
Optional
+ 16
+
100
μ
F~330
μ
F
-
+
-
- 1
7
9
+Vout
KC24RT-XXX
8
1st LED
Last LED
AC IN
(PWM Dim/ON/OFF)
(Figure 7) AC input recommended circuit
-Vout
TYPICAL TEMPERATURE CURVE
Temperature Derating Graph
RECOMMENDED REFLOW SOLDERING PROFILE
250
Peak.Temp 240 C
10 Sec Max
220 C
60 Sec Max
(>220 C)
200
Temperature ( C)
150
100
50
0
Time (sec. )
Operating Temp.(
C
)
Remark: The curve applies only to the hot air reflow soldering.
CHARACTERISTICS CURVE
Vin=24V
100
90
E ffic ienc y(% )
KC24RT-300
KC24RT-350
KC24RT-500
KC24RT-600
KC24RT-700
80
70
60
50
40
30
20
0
3
6
9
12
15
Output Voltage(V)
18
0
3
6
9
12
15
18
Output voltage(V)
21
24
27
30
KC24RT-300
KC24RT-350
KC24RT-500
KC24RT-600
KC24RT-700
Vin=12V
100
90
E fficien cy (% )
80
70
60
50
40
30
20
100
90
Vin=36V
Efficiency(%)
KC24RT-300
KC24RT-350
KC24RT-500
KC24RT-600
KC24RT-700
Vin=48V
100
90
80
70
60
50
40
30
20
0
3
6
9 12 15 18 21 24 27 30 33 36
Output voltage(V)
KC24RT-300
KC24RT-350
KC24RT-500
KC24RT-600
KC24RT-700
E fficie ncy(% )
80
70
60
50
40
30
20
0
3
6
9
12
15
18
21
24
27
30
33
36
Output voltage(V)
The copyright and authority for the interpretation of the products are reserved by
MORNSUN
Specifications subject to change without notice.
KC24RT -XXX
2012.02.26-A/4
Page 4 of 5
OUTLINE DIMENSIONS & PIN CONNECTIONS
Note:
1. Operation under minimum output voltage will not damage the converter; However, they may not meet all specification listed.
2. All specifications measured at Ta=25°C, humidity<75%, nominal input voltage and rated output load unless otherwise specified.
3. Only typical models listed, other models may be different, please contact our technical person for more details.
4. In this datasheet, all the test methods of indications are based on corporate standards.
The copyright and authority for the interpretation of the products are reserved by
MORNSUN
Specifications subject to change without notice.
KC24RT -XXX
2012.02.26-A/4
Page 5 of 5
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