regulators are ideally suited to replace 78xx linear regulators
and are pin compatible.
Patent Protection
PART NUMBER SYSTEM
K78LXX-1000R2
Output Current
Output Voltage
Product Series
RoHS
SELECTION GUIDE
Model
K78L01-1000R2
K78LX2-1000R2
K78L02-1000R2
K78L03-1000R2
K78L05-1000R2
Input Voltage(VDC)
Nominal
Range
12
12
12
12
12
4.75-18
4.75-18
4.75-18
4.75-18
6.5-18
Ouput Voltage
(VDC)
1.5
1.8
2.5
3.3
5.0
Ouput Current
(mA)
1000
1000
1000
1000
1000
Efficiency (%,max)
Vin(Min)
Vin (Max)
76
78
83
86
91
72
75
80
83
88
INPUT
SPECIFICATIONS
Item
No-load Input Power
Reverse Polarity Input
Input Filter
Test Conditions
Input voltage range
Min.
--
Typ.
--
Forbidden
Max.
0.27
Unit
W
Capacitance Filter（10μF）
OUTPUT SPECIFICATIONS
Item
Output Voltage accuracy
Line Regulation
Load Regulation
Switching Frequency
Output Current Limit
Temperature Drift
Ripple & Noise*
Over Temperature Protection
Short circuit input power
Short circuit protection
Max. Capacitive Load
--
-40℃½+85
℃
20MHz bandwidth(refer to figure 4)
IC inside
Input Voltage Range
Test Conditions
100% load，input voltage range
Input voltage range
From 10% to 100% full load
100% load, input Voltage Range
Min.
--
--
--
350
--
--
--
--
--
Typ.
±2
±0.4
±0.5
400
--
--
20
--
0.3
Max.
±3
±0.75
±1.0
450
2800
±0.025
35
160
1.8
Unit
%
KHz
mA
%/°C
mVp-p
℃
W
Continuous, automatic recovery
--
1000
µF
Note:* Ripple and noise tested by
“parallel
cable” method. See detailed operation instructions at Testing of Power Converter section, application notes.
The copyright and authority for the interpretation of the products are reserved by MORNSUN
K78LXX-1000R2
A/0-2012
COMMON SPECIFICATIONS
Item
MTBF
Case material
Dimensions
Weight
--
Test Conditions
MIL-HDBK-217F@25℃
Min.
1000
Typ.
--
Max.
--
Unit
K hours
Plastic (UL94-V0)
11.60*7.50*10.20
2.0
--
mm
g
ENVIRONMENTAL SPECIFICATIONS
Item
Storage Humidity
Operating Temperature
Storage Temperature
The Max. Case Temperature
Lead Temperature
Cooling
Operating temperature curve range
1.5mm from case for 10 seconds
Test Conditions
Non condensing
Power derating(above 55℃)
Min.
--
-40
-55
--
--
Typ.
--
--
--
--
--
Max.
95
85
125
100
300
Unit
%
°C
Free air convection
EMC SPECIFICATIONS
EMI
CE
RE
ESD
RS
EFT
EMS
Surge
CS
Voltage dips、short and
interruptions immunity
CISPR22/EN55022
CISPR22/EN55022
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
IEC/EN 61000-4-29
CLASS B
CLASS B
（External
Circuit Refer to Figure1-②）
（External
Circuit Refer to Figure1-②）
perf. Criteria B
perf. Criteria A
perf. Criteria B
（External
Circuit Refer to Figure 1-①）
perf. Criteria B
（External
Circuit Refer to Figure 1-①）
perf. Criteria A
perf. Criteria B
Contact
±4KV
10V/m
±2KV
±2KV
3Vr.ms
0%-70%
EMC RECOMMENDED CIRCUIT
Recommended external circuit parameters:
FU SE
V in
+
MOV
GN D
TVS
C1
C0
LDM1
LD M2
+ Vin
EUT
+ Vout
GN D
LOAD
Components
FUSE
MOV
LDM1
TVS
C0
C1
Standard Parameter
Choose according to
practical input current
10D560
82μH
SMCJ36A
470μF/25V
4.7μF/50V
①
②
(Figure 1) EMC Recommended Circuit
Note: In Figure 1,part
①
is EMS recommended external circuit, part
②
is EMI recommended external
circuit. Choose according to requirements.
EMC RECOMMENDED CIRCUIT PCB LAYOUT
（图
2）
EMC TEST WAVEFORM(CLASS B APPLY CIRCUIT)
K78L05-1000R2 CE (Positive line)
The copyright and authority for the interpretation of the products are reserved by MORNSUN
K78L05-1000R2 CE (Negative line)
K78LXX-1000R2
A/0-2012
TYPICAL APPLICATION CIRCUIT
+Vin
C1
GND
(Figure 3)
1
K78LXX-1000R2
3
+Vout
C2
GND
2
EXTERNAL CAPACITOR TABLE
Model
K78L03-1000R2
K78L05-1000R2
C1
(Ceramic
Capacitor)
10μF/25V
C2
(Ceramic
Capacitor)
10μF/6.3V
10μF/10V
Note：
1. General apply to the application-environment, C1 and C2 can be added in the circuit, and they should be placed as near as the products' footprints.
2. The capacitance of C1,C2 sees external capacitor table, it can be increased properly if required, and tantalum or low ESR electrolytic capacitors may also suffice.
3.
Cannot use in parallel for output and hot swap for input.
TEST CONFIGURATIONS (TA=25°C)
1.Efficiency and Output Voltage Ripple Test
25.4mm
25.4mm
12.7mm
+Vin
1
C1
2
C2
Ceramic Tantalum
Sco pe
GN D
C op pe r strip
(Figure 4)
2.Start-up and Load Transient Response Test
5 0 .8 m m
+Vin
1
C1
D C/D C
3
Con ve rter
2
C2
Copper strip
Vout
2.54 mm
Scope
GND
Copper strip
(Figure 5)
OUTPUT RIPPLE REDUCTION
+Vin
1
C1
DC/DC
3
Converter
2
Vout
L
C2
2 2
μ
F
GND
To reduce output ripple, it is recommended to add a LC filter in output port.
L: Recommended parameter 10μH ~ 47μH.
(Figure 6)
TYPICAL
DERATING CURVE
Operating Temperature(
C
)
The copyright and authority for the interpretation of the products are reserved by MORNSUN
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