BVA25 Series 20130814A

Isolated DC-DC Converters
BVA25 Series -- 25 /30Watt
Bothhand USA
Features
Wide 2 : 1 Input Voltage Range(9~18V,18~36V,36~75V)
High Efficiency up to 92%
Remote On/Off
Input / Output Isolation Voltage: 1.5K VDC
Extended Operating Temperature Range: -40°C to +85°C
Output Short Circuit Protection:
Description
Hiccup, continuous & Auto Recovery
Over Voltage Protection: Clamp Mode
Over Temperature Protection
Shielded Metal Case with Insulated Baseplate
Lead Free Design, RoHS Compliant
The BVA25 Series are isolated 25W DC/DC converters.
Designed with highly efficiency, allow the operating
temperature range of these units to be -40°C to +85°C in
a 50.8×40.6×10.2mm shielded metal case. Further
features include wide 2 : 1 input voltage range, remote
on/off control, short-circuit protection , over voltage
protection and over temperature protection.
Industry Standard Pinout
Applications
Adjustable Output Voltage
Customer Design Available
Safety Standard / Approval : IEC / EN 60950-1
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
(2) Capacitive
Output Current (mA)
Input Current (mA)
Eff .
Voltage
max.
(%) Load,
(3)
Min. Load (1)
Full. Load
No Load
Full Load
(V)
(uF)
BVA25-12S0
3.3
16
5500
49
1939
82
39000
BVA25-12S1
5
0
5000
58
2604
84
22000
12
10
2500
23
2976
88
5600
15
15
2000
24
2976
88
3900
BVA25-12D2
±12
±2
±1250
36
2976
88
2800
BVA25-12D3
BVA25-24S0
±15
±25
±1000
39
2941
89
1200
3.3
0
5500
52
945
84
39000
BVA25-24S1
5
0
5000
61
1255
87
22000
12
14
2500
15
1437
91
5600
15
5
2000
64
1437
91
3900
BVA25-24D2
±12
0
±1250
72
1437
91
2800
BVA25-24D3
±15
0
±1000
68
1437
91
1200
BVA25-48S0
BVA25-48S1
3.3
0
5500
15
473
84
39000
5
0
5000
23
628
87
22000
12
0
2500
18
718
91
5600
BVA25-12S2
BVA25-12S3
BVA25-24S2
BVA25-24S3
BVA25-48S2
BVA25-48S3
9~18V
Nominal:12V
18~36V
Nominal:24V
36~75V
Nominal:48V
15
0
2000
19
718
91
3900
BVA25-48D2
±12
0
±1250
20
718
91
2800
BVA25-48D3
±15
0
±1000
16
710
92
1200
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Rev:20130814A
Page 1 of 7
Isolated DC-DC Converters
BVA25 Series -- 25 /30Watt
Bothhand USA
Input Specifications
Input voltage
12V nominal input
9-18V
24V nominal input
18-36V
48V nominal input
36-75V
Input filter
Pi type
12V input
25V
Input surge voltage
24V input
50V
(100ms max.)
48V input
100V
Input reflected ripple current
Nominal Vin and full load
Start up time
Nominal Vin and constant resistive load
Remote ON/OFF
68mAp-p typ.
80ms typ.
Open or 3.5V<Vr<12V
Converter: ON
Short
Converter: OFF
(4)
or 0V<Vr<0.7V
Sourcing current of remote control pin
Nominal Vin
<0.2 mA
Idle input current (at Remote OFF state)
Nominal Vin
<12 mA
Environmental Specifications
-40°C to +85°C (with derating)
Operating ambient temperature
+100°C
Maximum case temperature
-55°C to +105°C
Storage temperature range
95% RH max.
Relative humidity
±0.02% / °C max.
Temperature coefficient
Output Specifications
30 Watts max.
Output power
Voltage accuracy
Full load and nominal Vin
±1%
See table
Minimum load
Line regulation
LL to HL at full load
25% load to full load
Load Regulation
Balanced load
±1%
Single
±1%
Dual
±1%
Unbalanced load 25% to 100% full load
Ripple and Noise
±3%
20MHz bandwidth
85mVp-p max.
3.3Vout models
3.9V
Over voltage protection
5Vout models
6.2V
(Zener Diode Clamp)
12Vout models
15V
15Vout models
18V
Capacitive load
Over load protection
See table
% of full load at nominal input
150% typ.
115°C typ.
Thermal shutdown
Short circuit protection
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Hiccup, continuous(Auto Recovery)
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Rev:20130814A
Page 2 of 7
Isolated DC-DC Converters
BVA25 Series -- 25 /30Watt
Bothhand USA
50% load step change
Transient response settling time
360µs typ.
(2.6ms for 3.3Vout)
Transient response over shoot
di/dt=0.8A/µs
≤ ±5% of Vo
Efficiency
Nominal input
See table
Isolation voltage
Input to output
General Specifications
Isolation resistance
1500VDC
9
500VDC
10 Ohms min.
Isolation capacitance
1200pF typ.
Switching frequency
300kHz typ.
6
Reliability, calculated MTBF
1.28 × 10 Hrs
Physical Specifications
Case material
Nickel-coated copper
Base material
Non-conductive black plastic
Silicon rubber (UL94 V-0)
Potting material
2.00 × 1.60 × 0.40 Inch
Dimensions
(50.8 × 40.6 × 10.2 mm)
Weight
48g (1.69oz) typ.
BVA25 Series
(5)
Output Power (%)
Power Derating Curve
Ambient Temp.TA (℃)
BVA25-48S1
Output Current vs. Efficiency
Efficiency (%)
Efficiency (%)
BVA25-48S1
Input voltage vs. Efficiency
Input voltage (V)
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Output Current (A)
Rev:20130814A
Page 3 of 7
Bothhand USA
Isolated DC-DC Converters
BVA25 Series -- 25 /30Watt
BVA25-48S1
BVA25-48S1
Transient Response at 50%~100% Max Load
Loop Gain & Phase at Vi=48V,Full Load
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 BVA25-48S1.
Mechanical Dimensions
Pin
1
2
3
4
5
6
7
Pin Assignment
Single
Dual
+Vin
+Vin
-Vin
-Vin
Remote On/Off Remote On/Off
No pin
+Vout
-Vout
Trim
+Vout
Common
-Vout
Trim
Unit: mm [inch]
Tolerance:±0.5[0.02]
Specifications subject to change without notice.
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Rev:20130814A
Page 4 of 7
Isolated DC-DC Converters
BVA25 Series -- 25 /30Watt
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
V
V
Load
◎DC Power Supply: It offers a wide voltage and current range precisely.
◎Current meter (A): Accuracy 200μA ~ 200mA 4 ranges+(0.2% rdg + 2 digits)
2000mA ~ 20A
2 ranges+(0.3% rdg + 2 digits).
◎Voltage meter (V): Accuracy +(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 4.5~5.5V
12V nominal input 10.8~13.2V
24V nominal input 21.6~26.4V
Wide input voltage range 2:1
5V nominal input 12V nominal input 24V nominal input 48V nominal input 4.5~9V
9~18V
18~36V
36~75V
Wide input voltage range 4:1 (W)
24V nominal input 9~36V
48V nominal input 18~75V
2. Input power :
Pin = Vin x Iin
Vin:Input voltage
Iin:Input current
Pout = Vout x Iout
Vout:Output voltage
Iout:Output current
3. Output power :
4. Efficiency :
Efficiency =
Pout
Pin
x100%
Pout: Output power
Pin: Input power
5. Voltage accuracy:
│
│Vout-Vout(nominal)│
Vout
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x100%
Vout:Output voltage
Vout(nominal):Nominal output voltage
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Rev:20130814A
Page 5 of 7
Isolated DC-DC Converters
BVA25 Series -- 25 /30Watt
││││
││││
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.
Δ Vout
Line regulation=
Δ Vin
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 :
│ x100%
│Vout(FL)-Vout(NL)│
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
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Rev:20130814A
Page 6 of 7
Isolated DC-DC Converters
BVA25 Series -- 25 /30Watt
Bothhand USA
Output Ripple&Noise measurement test circuit: as shown below.
Copper strip
DC/DC
converter
Co
Oscilloscope
Load
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
Output Power (%)
drawn from the output and the device is already running. The temperature derating curve shows the operating
power-temperature range. As shown below.
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.
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Rev:20130814A
Page 7 of 7
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