BUC20-48S2W [BOTHHAND]
Isolated DC-DC Converters;
| 型号： | BUC20-48S2W |
| 厂家： | 
BOTHHAND USA, LP. |
| 描述： | Isolated DC-DC Converters |
| 文件： | 总7页 (文件大小：789K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PRELIMINARY
Isolated DC-DC Converters
BUC20W Series -- 20 Watt
Bothhand USA
Features
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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
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Description
Shielded Metal Case with Insulated Baseplate
Lead Free Design, RoHS Compliant
6 pin DIP Package with Industry-Standard Footprint
Standard 2”X1” Package
The BUC20W Series are isolated 20W DC/DC converters.
Designed with highly efficiency, allow the operating
temperature range of these units to be -40°C to +85°C (with
derating) in a 6 pin DIP package with industry-standard
footprint. Further features include wide 4 : 1 input voltage
range, remote on/off control, trimmable output, short-circuit
protection, over voltage protection and over temperature
protection.
Customer Design Available
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 All specifications are typical at nominal input, full load and 25°C unless otherwise stated.
Output
Voltage
(V)
Capacitive
Load, max. (3)
(uF)
Eff .(2)
(%)
Output Current (mA)
Min. Load(1)
Input Current (mA)
Input Voltage
Range
Model
Number
Full. Load
No Load
Full Load
BUC20-24S0W
BUC20-24S1W
BUC20-24S2W
BUC20-24S3W
BUC20-24D1W
BUC20-24D2W
BUC20-24D3W
BUC20-48S0W
BUC20-48S1W
BUC20-48S2W
BUC20-48S3W
BUC20-48D1W
BUC20-48D2W
BUC20-48D3W
3.3
5.1
12
15
5
0
0
5500
4000
1670
1330
2000
835
70
86
38
49
91
45
95
25
38
40
37
39
42
43
945
1012
1006
990
84
88
87
88
88
87
87
86
89
89
89
90
89
88
33000
18000
3300
2200
8200
1000
900
150
80
0
9~36V
Nominal:24V
992
12
15
3.3
5.1
12
15
5
25
0
1006
1002
461
665
0
5500
4000
1670
1330
2000
835
33000
18000
3300
2200
8200
1000
900
0
500
90
55
0
491
18~75V
Nominal:48V
489
484
12
15
10
0
491
665
495
Rev:20130814A
Page 1 of 7
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PRELIMINARY
Isolated DC-DC Converters
BUC20W Series -- 20 Watt
Bothhand USA
Input Specifications
Input Voltage
24V nominal input
48V nominal input
9-36V
18-75V
Input filter
Pi Type
50V
Input surge voltage
(100ms max.)
24V nominal input
48V nominal input
100V
Input reflected ripple current
Start up time
Nominal Vin and full load
100mAp-p typ.
Nominal Vin and constant resistive load
Converter: ON
80ms typ.
Open or 3.5V＜Vr＜12V
Short (4) or 0V＜Vr＜0.7V
＜0.2 mA
Remote ON/OFF
Converter: OFF
Sourcing current of remote control pin
Nominal Vin
＜15 mA
Idle input current (at Remote OFF state) Nominal Vin
Environmental Specifications
Operating ambient temperature
Maximum case temperature
-40°C to +85°C (with derating)
+100°C
Storage temperature range
Relative humidity
-55°C to +105°C
95% RH max.
Temperature coefficient
0.02% / °C max.
Output Specifications
Output power
20.4 Watts max.
Voltage accuracy
Minimum load
Line regulation
Full load and nominal Vin
1%
See table
0.5%
LL to HL at full load
25% load to full load
Balanced load
Single
Dual
0.5%
Load Regulation
Ripple and Noise
0.5%
Unbalanced load 25% to 100% full load
20MHz bandwidth
3%
85mVp-p max.
(Measured with a 2.2uF/50V MLCC)
3.3Vout models
3.9V
Over voltage protection
(Zener Diode Clamp)
5.1Vout models
6.2V
12Vout models
15V
18V
15Vout models
Capacitive load
See table
Over load protection
% of full load at nominal input
50% load step change
di/dt=0.8A/ꢀs
110% min.
Short circuit protection
Transient response settling time
Hiccup, continuous (Auto Recovery)
300ꢀs typ.
(1.8ms for 3.3Vout)
Transient response over shoot
≤
5% of Vo
(≤ 8% for 3.3Vout)
Rev:20130814A
Page 2 of 7
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PRELIMINARY
Isolated DC-DC Converters
BUC20W Series -- 20 Watt
Bothhand USA
General Specifications
Efficiency
Nominal input
Input to output
500VDC
See table
1500VDC
Isolation voltage
10 9 Ohms min.
1200pF typ.
Isolation resistance
Isolation capacitance
Switching frequency
Reliability, calculated MTBF
300kHz typ.
1.06 × 10 6 Hrs
Physical Specifications
Case material
Nickel-coated copper
Non-conductive black plastic
Silicon rubber (UL94V-0)
2.0 × 1.0 × 0.4 Inch
Base material
Potting material
Dimensions
Weight
(50.8 × 25.4 × 10.2 mm)
32.0g (1.13oz) typ.
BUC20W Series
Power Derating Curve(5)
120
100
80
70
60
40
20
0
120
-40 -20
20
40 60 70 80 105
0
Ambient Temp.TA (℃)
BUC20-48S1W
Input voltage vs. Efficiency
BUC20-48S1W
Output Current vs. Efficiency
Input voltage (V)
Output Current (A)
Rev:20130814A
Page 3 of 7
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PRELIMINARY
Isolated DC-DC Converters
BUC20W Series -- 20 Watt
Bothhand USA
BUC20-48S1W
BUC20-48S1W
Transient Response at 50%~100% Max Load
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 BUC20-48S1W.
Mechanical Dimensions
Pin Assignment
Pin
1
Single
+Vin
-Vin
Dual
+Vin
-Vin
2
3
Remote On/Off
4
+Vout
-Vout
Trim
+Vout
Common
-Vout
5
6
Specifications subject to change without noticed.
Rev:20130814A
Page 4 of 7
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PRELIMINARY
Isolated DC-DC Converters
BUC20W Series -- 20 Watt
Bothhand USA
Test Configurations
All specifications are typical at nominal input, full load and 25°C unless otherwise stated.
A
A
DC
Power Supply
DC/DC
converter
Load
V
V
◎DC Power Supply: It offers a wide voltage and current range precisely.
◎Current meter (A): Accuracyꢁ 200μA ~ 200mA 4 ranges+(0.2% rdg + 2 digits)
2000mA ~ 20A 2 ranges+(0.3% rdg + 2 digits).
◎Voltage meter (V): Accuracyꢁ +(0.03% rdg + 4 digits).
◎ Load: At full load.
◎ ◎Wires: The resistance of the wires must be small.
1. Input voltage range: Narrow input voltage range（±10%）、wide input voltage range (2:1 and 4:1)。
EX: Narrow input voltage range（±10%）
5V nominal input
12V nominal input
24V nominal input
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4.5~5.5V
10.8~13.2V
21.6~26.4V
Wide input voltage range 2:1
5V nominal input
12V nominal input
24V nominal input
48V nominal input
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4.5~9V
9~18V
18~36V
36~75V
Wide input voltage range 4:1 (W)
24V nominal input
48V nominal input
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9~36V
18~75V
2. Input power :
Pin = Vin x Iin
Vin：Input voltage
Iin：Input current
3. Output power :
Pout = Vout x Iout
Vout：Output voltage
Iout：Output current
4. Efficiency :
Pout
Pin
x100%
Efficiency =
Pout: Output power
Pin: Input power
5. Voltage accuracy:
│Vout-Vout(nominal)│
Vout
x100%
Vout：Output voltage
Vout(nominal)：Nominal output voltage
Rev:20130814A
Page 5 of 7
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PRELIMINARY
Isolated DC-DC Converters
BUC20W Series -- 20 Watt
Bothhand USA
6. Line regulation: (1) Wide input voltage range and regulated output voltage series.
│Vout(LL)-Vout(HL)│
Vout(LL)
LL: Low Line input voltage
HL: High Line input voltage
x100%
(2) Narrow input voltage range（±10%）and unregulated output voltage series.
ΔVout
Line regulation=
ΔVin
ΔVout = Vout(+10%)-Vout(-10%) x100%
Vout
Vout(+10%)：Output voltage at Vin = 1.1xVin(nominal)&full load
Vout(-10%)：Output voltage at Vin = 0.9xVin(nominal)&full load
Vout：Output voltage at Vin = Vin(nominal)&full load
ΔVin = Vin(+10%)-Vin(-10%) x100%
Vin(nominal)
Vin(+10%)：Input voltage = 1.1xVin(nominal)
Vin(-10%)：Input voltage = 0.9xVin(nominal)
Vin(nominal)：Nominal Input voltage
7. Load regulation :
│Vout(FL)-Vout(NL)│ x100%
Vout(FL)
Vout(FL): Output voltage at full load
Vout(NL): Output voltage at 25% full load or 10% full load
8. Ripple and Noise: as shown below. The bandwidth is 0-20MHz.
Ripple&Noise
Noise
Ripple
Rev:20130814A
Page 6 of 7
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PRELIMINARY
Isolated DC-DC Converters
BUC20W Series -- 20 Watt
Bothhand USA
Output Ripple&Noise measurement test circuit: as shown below.
Copper strip
DC/DC
Oscilloscope
Load
Co
converter
Copper strip
Co: usually 0.47uF.
9. Temperature derating curve: The DC-DC converter will operate over a wider temperature range if less power is
drawn from the output and the device is already running. The temperature derating curve shows the operating
power-temperature range. As shown below.
120
100
80
70
60
40
20
0
120
-40 -20
20
40 60 70 80 105
0
Ambient Temp.TA (℃)
10. Switching frequency: The nominal operating frequency of the DC-DC converters.
11. Input to output isolation: The dielectric breakdown strength test between input and output circuits. This is the
isolation voltage the device is capable of withstanding for a specified time, usually 1 second or 1 minute.
Rev:20130814A
Page 7 of 7
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