VR-78H Series
MOTIEN
TECHNOLOGY
0.4A - 0.5A Output Current, Non-Isolated DC/DC converter
Features
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3 Pin SIL, Full SMD Technology
Non isolated, No need for heatsinks
Low Quiescence Current at no load
High voltage input range, up to 72V
Continuous Short Circuit Protection
Pin-out compatible with LM78XX three terminals positive Regulator
Efficiency up to 95%
Low ripple and noise
T
he VR-78H series is a family of cost effective 1.65~6.0W single output buck DC-DC converters. These converters are encapsulated in a
non-conductive black plastic package 3-pin SIL case, continuous short circuit protection with automatic restart, good line / load
regulation and ultra low quiescence current. Devices are filled up with flame retardant resin .Input voltages of 9~72, 14~72, 17~72, 21~72,
and 36~72 with output voltage of 3.3, 5, 6.5, 7.2, 9 , 12 and 15Vdc. High performance features include high efficiency operation up to 95%.
All specifications typical at Ta=25°C, nominal input voltage and full load unless otherwise specified
PHYSICAL SPECIFICATIONS
OUTPUT SPECIFICATIONS
Voltage accuracy
Output Current(Full Load)
Line regulation
Load regulation
Ripple & noise (20 MHz bandwidth)(1)
Short Circuit Protection
Temperature coefficient
Capacitor load (2)
±3%
See table
±1%
(From 10% to 100% Load) ±1%
(From 10% to 100% Load) 75mVpk-pk
Indefinite(Automatic Recovery)
±0.02%/°C
See table
Case Material
Pin Material
Potting Material
Weight
Dimensions
EMC CHARACTERISTICS(5)
Radiated Emissions
Conducted Emissions
ESD
RS
EFT
Surge
CS
PFMF
INPUT SPECIFICATIONS
Input Voltage Range
Input Current (No-Load)
Input Current (Full-Load)
Input Filter
Input Reflected Ripple Current (3)
See table
See table
See table
Capacitors
35mApk-pk
EN55022
EN55022
IEC61000-4-2
IEC61000-4-3
IEC61000-4-4
IEC61000-4-5
IEC61000-4-6
IEC61000-4-8
CLASS B
CLASS B
Perf. Criteria A
Perf. Criteria A
Perf. Criteria A
Perf. Criteria A
Perf. Criteria A
Perf. Criteria A
ABSOLUTE MAXIMUM RATINGS (6)
GENERAL SPECIFICATIONS
Efficiency
Switching Frequency (4)
Humidity
Reliability Calculated MTBF (MIL-HDBK-217 F)
Non-conductive Black Plastic(UL94V-0 rated)
C5191R-H Solder-coated
Silicon (UL94V-0 rated)
2.2g
0.46”x0.29”x0.40”
These are stress ratings. Exposure of devices to any of these
conditions may adversely affect long-term reliability.
Input Surge Voltage(100mS)
75 Vdc, max.
Soldering Temperature
260°C, max.
See table
120-800kHz
95% rel H
>4.5Mhrs
(1.5mm from case 10 sec. max.)
ENVIRONMENT SPECIFICATIONS
Operating Temperature
-40°C~85°C (See Derating Curve)
Maximum Case Temperature
105°C
Storage Temperature
-40°C~125°C
Nature Convection
Cooling
NOTE
1. Ripple/Noise measured with 20MHz bandwidth.
2. Tested by minimal Vin and constant resistive load.
3. Measured Input reflected ripple current with a simulated source inductance of 12uH.
4. The switching frequency is different according to output voltage models.
5. Input filter components (C1, C2, L) are used to help meet EMI & EMS requirement for the module.
These components should be mounted as close as possible to the module; and all leads should be minimized to decrease radiated noise.
6. Do not operate the unit(s) exceeding the absolute maximum rating, over rating causes damage to the units.
7. Operation under no-load conditions will not damage these devices, however they may not meet all listed specifications.
The information and specifications contained in this data sheet are believed to be correct at time of publication. However, MOTIEN Technologies accepts no responsibility for
consequences arising from printing errors or inaccuracies. Specifications are subject to change without notice. No rights under any patent accompany the sale of any such product(s)
or information contained herein.
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VR-78H Series
0.4A - 0.5A Output Current, Non-Isolated DC/DC converter
PART NUMBER STRUCTURE
Derating Curve
VR - 78H 3R3
100%
OUTPUT POWER
Series Name
For 78H Regulator I.C. Pin Out
High voltage input range
Output Voltage
3R3 - 3.3V
05 - 5V
6R5 - 6.5V
7R2 - 7.2V
09 - 9V
12 - 12V
15 - 15V
75%
S.O.A.
50%
40%
25%
-40
-20
0
20
40
60
80
85
100
120
AMBIENT TEMPERATURE(°C)
MODEL SELECTION GUIDE
MODEL NUMBER
VR-78H3R3
VR-78H05
INPUT
Voltage Range
(Vdc)
9-72
INPUT Current (mA)
Full Load
No-Load
(Max)
Vin(Min)
Vin(Max)
3.0
224.00
31.00
OUTPUT
Voltage
Current
(Vdc)
(mA)
3.3
500
EFFICIENCY
Vin (Min) Vin (Max)
@FL(%)
@FL(%)
82
75
Capacitor
Load(uF)
100
9-72
3.0
316.00
44.00
5.0
500
88
80
100
VR-78H6R5
9-72
3.0
397.00
55.00
6.5
500
91
83
100
VR-78H7R2
14-72
3.0
283.00
60.00
7.2
500
91
84
100
VR-78H09
14-72
3.0
350.00
73.00
9.0
500
92
86
100
VR-78H12
17-72
3.0
376.00
94.00
12
500
94
89
100
VR-78H15
21-72
3.0
301.00
94.00
15
400
95
89
100
TYPICAL OPERATING CONDITIONS
Switching Frequency vs. Load
Switching Frequency
800
700
The switching frequency is different according
to output voltage models.
Operation under no load will not damage these
devices, however they may not meet all
specifications.
A minimum load of 10mA is recommended.
Vo=15V
600
Frequency (KHz)
Vo=12V
500
400
Vo=9.0V
300
Vo=7.2V
Vo=6.5V
Vo=5.0V
200
100
50
10
10
Vo=3.3V
50
100
200
300
400
Output Current (mA) (Vin=24V-72V)
500
EMC COUNTERMEASURES
EMC Countermeasures
DC/DC Converter
L
+Vin
Input filter components (C1, C2, L) are used to
help meet EMI & EMS requirement for the module.
These components should be mounted as close
as possible to the module; and all leads should be
minimized to decrease radiated noise.
+Vout
Gnd
VR-78HXX
Load
C2
C1
C1
L
C2
220uF,100V
12uH
220uF,100V
The models listed above is just for standard type. If you need the special specification product, please contact our service member by telephone presented in shortform cover or e-mail
to : sales@motien.com.tw
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VR-78H Series
0.4A - 0.5A Output Current, Non-Isolated DC/DC converter
TEST CONFIGURATIONS
STANDARD APPLICATION CIRCUIT
VR-78HXX
+Vin
+Vout
+Vin
ON
C1
OFF
L1
DC/DC
CONVERTER
Current
probe
C2
+Vout
C1
(1ms)
-Vin
-Vout
-Vin
1. If Vin>50V, in order to protect the converter
during power-up, add an external capacitor of
C1=3.3uF/100V is required.
2. C2=100uF(Optional)
-Vout
Input reflected ripple current is measured through
a source inductor L1(12uH) and a source capacitor
C1=47uF at nominal input and full load.
APPLICATION EXAMPLES
High efficiency, isolated, dual unregulated outputs, one economic way to build up isolated dual output
Isolated dual outputs
+Vin
Wide input range
C1: Optional
C1
C2: Required(further decoupling
filtering may be necessary
between the two converters)
+Vout
VR-78HXX
DC
C2
Com
DC
-Vin
-Vout
Isolated (up to 6KV), wide input range regulated output
High isolation voltage
+Vin
Wide input voltage range
Point-of-load Architecture
+Vout
VR-78HXX
DC
Improved loading / line regulation
C1
C2
DC
-Vin
-Vout
C1: Required(further decoupling filtering may be necessary between the two converters)
C2: Optional
MECHANICAL SPECIFICATIONS
11.68
(0.46)
9.65
(0.38)
DC-DC CONVERTER
VR-78H05
7.50
(0.29)
PIN CONNECTIONS
Printed Face
10.15
(0.40)
MOTIEN
XXXX
0.50
(0.02)
1
2
3
4.10
(0.16)
2.54
(0.10)
5.08
(0.20)
PIN NUMBER
SINGLE
1
+V Input
2
GND
3
+V Output
0.50
(0.02)
7.50
(0.29)
0.25
(0.01)
2.00
(0.08)
0.50
(0.02)
MOTIEN
Notes : All dimensions are typical in millimeters ( inches ).
1. Pin diameter: 0.5±0.05 ( 0.02±0.002 )
2. Pin pitch and length tolerance: ±0.35 ( ±0.014 )
3. Pin to case tolerance: ±0.5 ( ±0.02 )
4. Case Tolerance: ±0.5 ( ±0.02 )
ISO 9001 . ISO 14001 . IECQ QC080000
DRAWING:
No. 9, Keji 2nd Rd., Tainan Technology Industrial Park, Tainan City 70955, Taiwan
Te l : 886-6-384 2366 (Rep.)
Fax: 886-6-384 2399
Website : www.motien.com.tw Email : sales@motien.com.tw
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Last Update : May.08.2014