KC24H-R series is a high-power LED driver design for the step-down constant current source. With high efficiency, wide input voltage range,
high-temperature environment, functional and so on. Contains a PWM dimming, analog dimming and remote shutdown capabilities.
They can be widely used in Backlight and 12V, 24V, 36V automotive lighting, landscape lighting, special lighting controls, commercial
lighting, street lighting, home lighting and other lighting systems.
Selection Guide
Input
Model
KC24H-300R(X1/X2/X3)
KC24H-350R(X1/X2/X3)
KC24H-500R(X1/X2/X3)
KC24H-600R(X1/X2/X3)
KC24H-700R(X1/X2/X3)
24(5.5-48)
Nominal
(range)
Input Voltage
(VDC)
Input Current (mA)
(Typ.)(5LEDs)
237
276
395
474
553
3.3-36
Output
Output Voltage
Output Current
(VDC)
(mA)
0-300
0-350
0-500
0-600
0-700
95
1000
Efficiency
(%, Typ),
Full Load
Max.
Capacitive
Load(uF)
Notes:
1. For the product model without a suffix such as KC24H-300R, this product is a 4-pin product without the functions of analogue dimming and PWM dimming.
2. For the product model with a suffix X1 such as KC24H-300RX1, this product is a 5-pin product only with the function of analogue dimming.
3. For the product model with a suffix X2 such as KC24H-300R X2, this product is a 5-pin product only with the function of PWM dimming.
4. For the product model with a suffix X3 such as KC24H-300R X3, this product is a 6-pin product with the functions of analogue dimming and PWM dimming.
Input Specifications
Item
Input Voltage Limit
Recommended Input Voltage
Min. Input-output Voltage Drop
Internal Power Dissipation
Reverse Polarity Input
Input Filter
Input voltage range
Vin=24V, 5LEDs
Operating Conditions
≤10
seconds
Min.
5
5.5
2
--
Typ.
--
24
--
--
Forbid
Capacitor Filter
Max.
55
46
4
0.7
W
VDC
Unit
Output Specifications
Item
Operating Conditions
Io:300mA
Io:350mA
Output Power
Io:500mA
Io:600mA
Io:700mA
Output Current Accuracy
Output Current Stability
Temperature Drift Coefficient
Ripple & Noise*
Over-temperature Protection
Output Short Circuit Protection
Io:300-600mA
Io:700mA
Vin=46V，Vo=3.3V~36V
-40
°C
~+71
°C
20MHz bandwidth(Vin=46V, 1~ 10 LEDs)
Min.
--
--
--
--
--
--
--
--
--
--
Typ.
--
--
--
--
--
±3
±5
±3
--
--
Max.
10.8
12.6
18
21.6
25.2
±5
±7
±5
± 0.015
100
Unit
W
%
%/
°
C
mVp-p
Self-recovery after cooling
Continuous, self-recovery
2014.02.28-A/3
Page 1 of 6
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
LED Driver
KC24H-R Series
Note: *Parallel line test method is adopted to test the ripple and noise. Test with X1 probe, please see
DC-DC Converter Application Notes
for specific
operation methods.
General Specifications
Item
Operating Temperature
Storage Temperature
Operating Humidity
Storage Humidity
Case Temperature Rise
Lead Temperature
Operating Frequency*
MTBF
Thermal Impedance
MIL-HDBK-217F@25℃
Ta=25°C
Welding spot is 1.5mm away from the casing, 10 seconds
Operating Conditions
300mA / 350mA
500mA/ 600mA/ 700mA
Min.
-40
-40
-55
--
--
--
--
550
1000
--
Typ.
--
--
--
--
--
--
--
645
--
60
Max.
85
71
125
95
95
65
300
750
--
--
Unit
℃
%
℃
KHz
K hours
°
C
/W
Note:* When the mode works in the high-voltage input-area and 1LED load, its operating frequency will range from 100KHz to 400KHz.
PWM Dimming and Remote on/off Control
Item
Input Voltage Range
Analogue
Dimming
Output Current Range
Control Voltage Range
Driving Current
ON
PWM
Dimming&
Remote
Turn-off
OFF
Turn-off-mode Static Input Current
Isink
Isourse
PWM Dimming Frequency*
Note: *Refer to “PWM Dimming Control” on page five.
Operating Conditions
Vin=5.5-46V
Vin=5.5-46V
Full on
Full off
Vc=5V
Min.
Typ.
0-15V
Max.
0%-100%
0.2V±50mV
Unit
4.5V±200mV
--
--
Vc<0.6V
0.2
mA
Open or 2.8V<Vc<6V
Vin=24V, Vc <0.6V
Vc=5V, Vin=24V, 5LEDs
Vc<0.6V, Vin=24V, 5LEDs
--
--
--
--
400
--
1
--
--
1
--
200
μA
mA
μA
Hz
Physical
Specifications
Black flame-retardant and heat-resistant plastic (UL94-V0)
22.80*10.20*9.50 mm
4.3g(Typ)
Free air convection
Casing Material
Package Dimensions
Weight
Cooling method
EMC
EMI
Specifications
Conducted Disturbance
Radiated Emission
Electrostatic
Discharge
KC24H-xxxR(X1)
KC24H-xxxRX2/X3
EN55015
power port/CISPR22
CLASS B
CLASS B (see Fig. 5 for recommended circuit)
(see Fig. 5 for recommended circuit)
perf. Criteria B
perf. Criteria B
perf. Criteria A
perf. Criteria B
perf. Criteria B
perf. Criteria A
EN55015 /CISPR22
IEC/EN 61000-4-2
IEC/EN 61000-4-2
IEC/EN 61000-4-3
IEC/EN 61000-4-4
IEC/EN 61000-4-5
IEC/EN 61000-4-6
Contact ±6KV
Contact ±2KV(see Fig. 5 for recommended circuit)
10V/m
±1KV (see Fig. 5 for recommended circuit)
±1KV (see Fig. 5 for recommended circuit)
3Vr.ms
EMS
Radiation Immunity
EFT
Surge Immunity
Conducted Disturbance Immunity
2014.02.28-A/3
Page 2 of 6
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
LED Driver
KC24H-R Series
Product Characteristic Curve
Temperature Derating Curve
Output Current (mA)
500~700
300~350
300~350
-40
0
40
71 85
120
Operating Temperature(℃)
Fig. 1
Vin=12V
100
95
Efficiency(%)
KC24H-500R
Vin=24V
100
KC24H-700R
KC24H-500R
90
85
80
75
0
3
KC24H-700R
Efficiency(%)
KC24H-350R
90
KC24H-350R
80
70
Output Voltage(V)
6
9
12
3
6
9
12
15
18
21
Output voltage(V)
Vin=36V
100
KC24H-700R
KC24H-500R
Vin=48V
100
Efficiency(%)
KC24H-700R
90
Efficiency(%)
KC24H-350R
90
80
70
60
50
KC24H-500R
80
70
60
50
0
3
6
9
12
15
18 21 24 27
Output voltage(V)
30
33
36
KC24H-350R
3
6
9
12
15
18
21
24
27
30
33
36
Output voltage(V)
Design Reference
1. Input/output relationship
Input
voltage(VDC)
46
36
24
20
15
12
5.5
46
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
Constant
Output power
output current
(W Max)
(mA)
300
300
300
300
300
300
300
500
500
500
500
500
500
500
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
Input
voltage(VDC)
46
36
24
20
15
12
5.5
46
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
Constant
output 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
2014.02.28-A/3
Page 3 of 6
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
LED Driver
KC24H-R Series
Constant
Output power
output current
(W Max)
(mA)
700
700
700
700
700
700
700
25.20
22.40
14.70
11.90
9.24
7.00
2.80
Output
voltage
range(VDC)
--
--
--
--
--
--
--
Constant
output current
(mA)
--
--
--
--
--
--
--
Input
voltage(VDC)
46
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
Input
voltage(VDC)
--
--
--
--
--
--
--
Output power
(W Max)
--
--
--
--
--
--
--
2. Typical application circuit
( Analo gu e Dim )
(Ana lo gue Dim)
3
+Vin
GND
4
KC24 H-xxxRX 3
5
+Vout
6
-Vout 1st LE D
2
Last LE D
+Vin
4
3
5
+Vout
KC 24H-xxxRX 3
1
GND
1
6
-Vout
2
PTC
PTC
1st LED
Last LED
( PWM D im/ ON/ OFF)
(PWM Dim/ ON/ OFF)
Fig. 2 Application circuits in series
Fig. 3 Application circuits in series and parallel
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
Figure 4.
Note: The negative output terminal can’t connect GND, or the module may be damaged.
3. Recommended AC input circuit
(Analogue Dim)
AC IN
D4
D1
Components
C1
C2
D1, D2, D3, D4
3
4
+
-
D3
5
+Vout
5VAC
~
32VAC
AC IN
C1
C2
KC24H-xxxRX3
1
2
+
D2
-
6
1st LED
Last LED
Specification
X1 Safety capacitor,
0.1μF /300VAC (QIYA)
100μF /63V Electrolytic capacitor,
Φ10×16(Flat
surface)NCC
Rectifier diode
1N4007 1A/1000V D0-41(PANJIT)
(PWM Dim/ON/OFF)
-Vout
Fig. 4
4. EMC solution-recommended circuit
L1
+Vin
Tvs
GND
①
C5
Last LED
Components
4
C3
DI M
*
R1
C6
Specification
SMC51A,1500W（ON）
CD53-82μH（CEAIYA）
470μF/100V（NCC）
225K/50V 1210 X7R (TORCH)
104K/50V 0805 X7R (TORCH)
105K/50V 1210 X7R (TORCH)
choose or no）
102K/2000V 1210 (TDK)（
470pF/100V 0805 (TORCH)
680Ω 0805(can replaced by
inductance or magnetic bead)
5 +Vout
Tvs
L1
1st LED
C1
C2
2
1
KC2 4H- xx xRX 3
C4
6 -Vout
C1
C2
C3
C4
C5
C6
R1
Fig.5 Recommended EMC circuit
Note: Add circuit
①
may let the ESD level of PWM-control pin reach to
±6KV.
2014.02.28-A/3
Page 4 of 6
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
LED Driver
KC24H-R Series
5. PWM dimming control
PWM Control Signal
1
0
Output Current
1
0
1
0
Output Current(LED turned on)
1
0
PWM Control Signal
1
0
Output Current(LED turned off)
PWM Control Signal
For PWM dimming signals with a certain frequency, the output current of the driver is related to the duty ratio of PWM signal. Refer to the
formula for the calculation method:
I
o_set
=
(DT-0.8)
Where, Io_set represents required output current (mA); D represents the duty ratio (%) of PWM signal; T represents the period (ms) of PWM
signal; and Io_norm represents the rated output value (mA) of the driver.
Note: The above formula is for reference only; and deviation of output current may exist due to various loads. The min. conducted time of PWM signal shall not
be less than 0.8ms, or the product will be in abnormal operation; in case of low voice from the driver during PWM dimming, it is normal since the PWM
dimming frequency is within the auditory frequency range of human ears (20Hz-20KHz in general). To prevent seeing flash of the LED by human eyes, it is
suggested to set the PWM dimming frequency between 100-200Hz.
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