BOTHHAND USA
Isolated DC-DC Converters
BOB8W Series -- 8 Watt
Features
Wide 4 : 1 Input Voltage Range(9~36V,18~75V)
Remote On/Off
High Efficiency up to 86%
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
Lead Free Design, RoHS Compliant
24pin DIP Package with Industry-Standard Footprint
Customer Design Available
Description
The BOB8W Series are isolated 8W DC/DC converters.
Designed with highly efficiency, allow the operating
temperature range of these units to be -40°C to +85°C in
a 24 pin DIP package with industry-standard footprint.
Further features include wide 4 : 1 input voltage range,
remote on/off control, short-circuit 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
BOB8-24S0W
BOB8-24S1W
9~36V
BOB8-24S3W Nominal:24Vdc
BOB8-24D1W
BOB8-24D2W
BOB8-24D3W
BOB8-48S0W
BOB8-48S1W
18~75V
BOB8-48S3W Nominal:48Vdc
BOB8-48D1W
BOB8-48D2W
BOB8-48D3W
BOB8-48S2W
BOB8-24S2W
All specifications are typical at nominal input, full load and 25°C unless otherwise stated.
Output Current (mA)
Min. Load
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Full. Load
No Load
3.3
5
12
15
±5
±12
±15
3.3
5
12
15
±5
±12
±15
2000
1500
665
535
±800
±335
±265
2000
1500
665
535
±800
±335
±265
30
45
15
16
17
20
20
13
21
6
6
5
6
7
343
386
410
413
422
418
409
172
190
205
206
211
207
204
84
85
85
85
83
85
85
84
86
85
85
83
85
85
20200
14400
2300
1530
6700
1000
760
22200
13000
2000
1330
6900
1100
760
Input Current (mA)
Full Load
(1)
Capacitive
Eff .
Load, max.
(%)
(2)
(uF)
Output
Input Voltage
Voltage
Range
(Vdc)
sales@bothhandusa.com
BOTHHAND USA
Isolated DC-DC Converters
BOB8W Series -- 8 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 input
48V input
Nominal Vin and full load
Nominal Vin and constant resistive load
Converter: ON
Converter: OFF
Nominal Vin
Nominal Vin
(3)
9-36Vdc
18-75Vdc
Pi Type
50Vdc
100Vdc
200mAp-p typ.
75ms typ.
Open or 3.5V＜Vr＜12V
Short
or 0V＜Vr＜0.7V
＜0.2
mA
＜6
mA
Environmental Specifications
Operating ambient temperature
Maximum case temperature
Storage temperature range
Relative humidity
Temperature coefficient
-40°C to +85°C (with derating)
+100°C
-55°C to +105°C
5% to 95% RH
±0.02% / °C max.
Output Specifications
Output power
Voltage accuracy
Minimum load
Line regulation
LL to HL at full load
25% load to full load
Load Regulation
Balanced load
Single
Dual
Full load and nominal Vin
8 Watts max.
±1%
See table
±0.5%
±1%
±1%
±5%
50mVp-p max.
3.9V
6.2V
15V
18V
See table
% of full load at nominal input
150% typ.
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)
5Vout models
12Vout models
15Vout models
Capacitive load
Over load protection
Short circuit protection
Transient response settling time
Transient response over shoot
50% load step change
di/dt=0.8A/µs
450µs typ.
≤ ±5% of Vo
sales@bothhandusa.com
BOTHHAND USA
Isolated DC-DC Converters
BOB8W Series -- 8 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.
260pF typ.
300kHz typ.
2.11 × 10 Hrs
Nickel-coated copper
Non-conductive black plastic
Silicon rubber (UL94V-0)
1.25 × 0.80 × 0.40 Inch
(31.75 × 20.32 × 10.16 mm)
18g (0.62oz) typ.
6
Physical Specifications
Case material
Base material
Potting material
Dimensions
Weight
BOB8W Series
120
Power Derating Curve
(4)
Output Power (%)
100
80
60
40
20
0
-40
-20
0
20
40
60
79
80
100
120
Ambient Temp.TA (℃)
℃
BOB8-48S1W
Input voltage vs. Efficiency
95
90
85
80
75
70
65
60
55
18
24
30
36
42
48
54
60
66
75
95
90
85
80
75
70
65
60
55
0.15
0.3
0.45
BOB8-48S1W
Output Current vs. Efficiency
Efficiency (%)
Efficiency (%)
0.6
0.75
0.9
1.05
1.2
1.35
1.5
sales@bothhandusa.com
BOTHHAND USA
Isolated DC-DC Converters
BOB8W Series -- 8 Watt
Input voltage (V)
Output Current (A)
BOB8-48S1W
Transient Response at 50%~100% Max Load
BOB8-48S1W
Loop Gain & Phase at Vi=48V,Full Load
Note
1. Typical value, tested at nominal input and full load.
2. For each output.
3. Short to -Vin (Pin 2,3).
4. Based on BOB8-48S1W.
Mechanical Dimensions
Pin Assignment
Single
Dual
Remote On/Off
-Vin
-Vin
-Vin
-Vin
No function
Common
No function
-Vout
+Vout
+Vout
-Vout
Common
+Vin
+Vin
+Vin
+Vin
Pin
1
2
3
9
11
14
16
22
23
Unit: mm [inch]
Tolerance:±0.5[0.02]
Specifications subject to change without notice.
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