BOTHHAND USA
Isolated DC-DC Converters
BUB20W Series -- 20 Watt
Features
Wide 4 : 1 Input Voltage Range(9~36V,18~75V)
High Efficiency up to 90%
Remote On/Off
Input / Output Isolation Voltage: 1.5K Vdc
Extended Operating Temperature Range: -40°C to+85°C
Output Short Circuit Protection:
Hiccup, continuous & Auto Recovery
Over Voltage Protection: Clamp Mode
Shielded Metal Case with Insulated Baseplate
Description
The BUB20W Series are isolated 20W DC/DC converters.
Designed with highly efficiency, allow the operating
Lead Free Design, RoHS Compliant
temperature range of these units to be -40°C to +85°C (with
6 pin DIP Package with Industry-Standard Footprint
derating) in a 6 pin DIP package with industry-standard
Standard 2”X1” Package
footprint. Further features include wide 4 : 1 input voltage
range, remote on/off control, trimmable output, short-circuit
Customer Design Available
protection and over voltage protection.
Applications
These converters are well suitable for battery operated
equipment, measurement equipment, telecom, wireless
network, Industry control system, everywhere where isolated,
tightly regulated voltages and compact size are required.
Technical Specification
Model
Number
Input Voltage
Range
All specifications are typical at nominal input, full load and 25°C unless otherwise stated.
Output
Voltage
(Vdc)
Output Current (mA)
Min. Load
(1)
Full. Load
Input Current (mA)
No Load
Full Load
Capacitive
Eff .
(2)
Load, max.
(3)
(%)
(uF)
BUB20-24S0W
BUB20-24S1W
9~36V
BUB20-24S3W Nominal:24VDC
BUB20-24D1W
BUB20-24D2W
BUB20-24D3W
BUB20-48S0W
BUB20-48S1W
18~75V
BUB20-48S3W Nominal:48VDC
BUB20-48D1W
BUB20-48D2W
BUB20-48D3W
BUB20-48S2W
BUB20-24S2W
3.3
5.0
12
15
±5
±12
±15
3.3
5.0
12
15
±5
±12
±15
0
0
53
18
0
33
33
0
0
53
18
0
28
33
5500
4000
1670
1330
±2000
±835
±665
5500
4000
1670
1330
±2000
±835
±665
42
67
23
23
66
25
29
17
31
8
8
28
9
11
937
997
1005
996
998
990
996
469
498
491
486
489
487
486
85
88
87
87
88
88
88
85
88
89
89
89
90
89
19760
16000
3360
2080
9760
1760
880
19760
16000
3360
2080
9760
1760
880
sales@bothhandusa.com
BOTHHAND USA
Isolated DC-DC Converters
BUB20W Series -- 20 Watt
Input Specifications
Input Voltage
24V nominal input
48V nominal input
Input filter
Input surge voltage
(100ms max.)
Input reflected ripple current
Start up time
Remote ON/OFF
Sourcing current of remote control pin
Idle input current (at Remote OFF state)
24V nominal input
48V nominal input
Nominal Vin and full load
Nominal Vin and constant resistive load
Converter: ON
Converter: OFF
Nominal Vin
Nominal Vin
(4)
9-36Vdc
18-75Vdc
Pi Type
50Vdc
100Vdc
60mAp-p max.
76ms typ.
Open or 3.5V＜Vr＜12V
Short
or 0V＜Vr＜0.7V
＜0.2
mA
＜12
mA
Environmental Specifications
Operating ambient temperature
Maximum case temperature
Storage temperature range
Relative humidity
Temperature coefficient
-40°C to +85°C (with derating)
+105°C max.
-55°C to +125°C
95% RH max.
±0.02% / °C max.
Output Specifications
Output power
Voltage accuracy
Minimum load
Line regulation
Load Regulation
LL to HL at full load
25% load to full load
Balanced load
Single
Dual
Full load and nominal Vin
20 Watts max.
±1%
See table
±1.0%
±1.0%
±0.5%
±5%
80mVp-p max.
3.9V
6.2V
15V
18V
See table
% of full load at nominal input
110% min.
Hiccup, continuous (Auto Recovery)
Unbalanced load 25% to 100% full load
Ripple and Noise
20MHz bandwidth
3.3Vout models
Over voltage protection
(Zener Diode Clamp)
5.1Vout models
12Vout models
15Vout models
Capacitive load
Over load protection
Short circuit protection
Transient response settling time
50% load step change
700µs max.
(1.4ms for 3.3Vout)
Transient response over shoot
di/dt=0.8A/µs
≤ ±5% of Vo
(≤ ±6% for 3.3Vout)
sales@bothhandusa.com
BOTHHAND USA
Isolated DC-DC Converters
BUB20W Series -- 20 Watt
General Specifications
Efficiency
Isolation voltage
Isolation resistance
Isolation capacitance
Switching frequency
Reliability, calculated MTBF
Nominal input
Input to output
500Vdc
9
See table
1500Vdc
10 Ohms min.
1050pF typ.
330kHz typ.
1.35 × 10 Hrs
Nickel-coated copper
Non-conductive black plastic
Silicon rubber (UL94V-0)
2.0 × 1.0 × 0.4 Inch
(50.8 × 25.4 × 10.2 mm)
32.0g (1.13oz) typ.
6
Physical Specifications
Case material
Base material
Potting material
Dimensions
Weight
BUB20W Series
Power Derating Curve(5)
120
100
Output Power (%)
80
60
40
20
0
-40
-20
0
20
40
60
Natural convection with heatsink
Natural convection without heatsink
71
78
80
105
100
120
Ambient Temp.TA (℃)
℃
BUB20-48S1W
Input voltage vs. Efficiency
Efficiency (%)
Efficiency (%)
BUB20-48S1W
Output Current vs. Efficiency
Input voltage (V)
Output Current (A)
sales@bothhandusa.com
BOTHHAND USA
Isolated DC-DC Converters
BUB20W Series -- 20 Watt
BUB20-48S1W
Transient Response at 50%~100% Max Load
BUB20-48S1W
Loop Gain & Phase at Vi=48V,Full Loa
Note
1. Io below this value will not damage these converters, however, they may not meet all listed specifications.
2. Typical value, tested at nominal input and full load.
3. For each output.
4. Short to -Vin (Pin 2).
5. Based on BUB20-48S1W.
Mechanical Dimensions
Pin Assignment
Single
Dual
+Vin
+Vin
-Vin
-Vin
+Vout
+Vout
Trim
Common
-Vout
-Vout
Remote On/Off
(optional)
Pin
1
2
3
4
5
6
Unit: mm [inch]
Tolerance:±0.5[0.02]
Specifications subject to change without noticed.
sales@bothhandusa.com
BOTHHAND USA
Isolated DC-DC Converters
BUB20W Series -- 20 Watt
Heat-sink (Option)
Material:
Weight:
Aluminum
10g (0.35oz)
Note:
The product label on converter has to be
removed before mounting the heat-sink.
For volume orders, converters will be supplied
with heat-sink already mounted. Please contact
factory for quotation.
Separate heat-sinks are only available for
prototypes and small quantity orders.
Specifications subject to change without notice.
sales@bothhandusa.com
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