DKB2PH3 Series 2 Watt
isolated DC-DC Converters
Features
7pin SIP Package with Industry-Standard Footprint
Input / Output Isolation Voltage: 3kVDC
High Efficiency
Lead Free Design, RoHS Compliant
Operating temperature: -40°C to +105°C
Meet Safety Standard / Approval: IEC / EN60950-1
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)
Output Current
(mA) (1)
Full Load
DKB2-05S0PH3
3.3
400
DKB2-05S1PH3
5
DKB2-05SAPH3
Input Current (mA)
Typ.
No Load Full Load
Eff .(%) (2)
Typ.
Capacitive Load,
max. (3) (uF)
338
78
68
400
500
80
47
9
220
477
83
33
DKB2-05S2PH3
12
166
475
84
22
DKB2-05S3PH3
15
133
475
84
22
24
83
475
84
10
25
80
475
84
10
DKB2-05D0PH3
±3
±200
338
78
33/33
DKB2-05D1PH3
±5
±200
500
80
22/22
DKB2-05DAPH3
±9
±110
477
83
10/10
DKB2-05D2PH3
±12
±83
475
84
10/10
DKB2-05D3PH3
±15
±66
475
84
10/10
DKB2-05D5PH3
±24
±42
475
84
4.7/4.7
DKB2-12S0PH3
3.3
400
143
77
68
DKB2-12S1PH3
5
400
208
80
47
DKB2-12SAPH3
9
220
199
83
33
DKB2-12S2PH3
12
166
198
84
22
15
133
198
84
22
24
83
198
84
10
DKB2-12D0PH3
±3.3
±200
143
77
33/33
DKB2-12D1PH3
±5
±200
208
80
22/22
DKB2-12DAPH3
±9
±110
199
83
10/10
DKB2-12D2PH3
±12
±83
198
84
10/10
DKB2-12D3PH3
±15
±66
198
84
10/10
Model
Number
Input Voltage
Range(V)
DKB2-05S5PH3
DKB2-05SLPH3
4.5-5.5
Nominal:5
DKB2-12S3PH3
DKB2-12S5PH3
10.8-13.2
Nominal:12
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35
15
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Page 1 of 7
DKB2PH3 Series 2 Watt
isolated DC-DC Converters
DKB2-15S0PH3
3.3
Output Current
(mA) (1)
Full Load
400
DKB2-15S1PH3
5
400
167
80
47
DKB2-15SAPH3
9
220
159
83
33
DKB2-15S2PH3
12
166
158
84
22
15
133
158
84
22
24
83
158
84
10
DKB2-15D0PH3
±3.3
±200
114
77
33/33
DKB2-15D1PH3
±5
±200
167
80
22/22
DKB2-15DAPH3
±9
±110
159
83
10/10
DKB2-15D2PH3
±12
±83
158
84
10/10
DKB2-15D3PH3
±15
±66
158
84
10/10
DKB2-24S0PH3
3.3
400
71
77
68
DKB2-24S1PH3
5
400
104
80
47
DKB2-24SAPH3
9
220
99
83
33
DKB2-24S2PH3
12
166
99
84
22
15
133
99
84
22
24
83
99
84
10
DKB2-24D0PH3
±3.3
±200
71
77
33/33
DKB2-24D1PH3
±5
±200
104
80
22/22
DKB2-24DAPH3
±9
±110
99
83
10/10
DKB2-24D2PH3
±12
±83
99
84
10/10
DKB2-24D3PH3
±15
±66
99
84
10/10
Model
Number
Input Voltage
Range(V)
DKB2-15S3PH3
DKB2-15S5PH3
13.5-16.5
Nominal:15
DKB2-24S3PH3
DKB2-24S5PH3
21.6-26.4
Nominal:24
Output
Voltage
(V)
Input Current (mA)
Typ.
No Load Full Load
114
12
8
Eff .(%) (2)
Typ.
Capacitive Load,
max. (3) (uF)
77
68
Input Specifications
5V nominal input
Input filter
4.5-5.5V
12V nominal input
10.8-13.2V
15V nominal input
13.5-16.5V
24V nominal input
21.6-26.4V
Capacitor
Environmental Specifications
Operating ambient temperature
Maximum case temperature
Storage temperature range
Relative humidity
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-40°C to +105°C
+125°C
-55°C to +125°C
95% RH max.
A0 (19/04)
Page 2 of 7
DKB2PH3 Series 2 Watt
isolated DC-DC Converters
Output Specifications
Output power
2Watts max.
Voltage accuracy
Nominal Vin and full load
3.3Vdc
5Vdc
9Vdc
12Vdc
15Vdc
24Vdc
25Vdc
Voltage balance
Dual output
Minimum load
±1% max.
10% load of full load
Line regulation
For Vin change of 1%
Load regulation
Nominal Vin and 10%-100% load
3.3Vdc
5Vdc
9Vdc
12Vdc
15Vdc
24Vdc
25Vdc
±1.2% Typ.
15% Typ.
13% Typ.
9% Typ.
8% Typ.
7% Typ.
6% Typ.
6% Typ.
100mVp-p Typ.
150mVp-p Max.
See table
Ripple and Noise (20MHz Bandwidth)
Maximum capacitive load
Output short circuit protection
3.135-3.399V
4.75-5.15V
8.73-9.18V
11.64-12.24V
14.55-15.30V
23.52-24.36V
24.50-25.37V
DKB2-24SXPH3/DKB2-24DXPH3
Other models
Temperature coefficient
3S Max.
Continuous, Automatic recovery
±0.03%/°C Typ.
General Specifications
Efficiency
Nominal input and full load
Isolation voltage
Input to output
Isolation resistance
500VDC
Isolation capacitance
Switching frequency
Reliability, calculated MTBF
See table
3000VDC (60 second)
1000MΩ min.
30pF typ.
150kHz typ.
300kHz max.
2×10
6
Hrs
Physical Specifications
Case material
Plastic (UL94 V-0)
Potting material
Epoxy (UL94 V-0)
Dimensions
Weight
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19.6× 10.1× 7.0 mm
2.5g Typ.
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Page 3 of 7
DKB2PH3 Series 2 Watt
isolated DC-DC Converters
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. Specifications subject to change without notice.
5. This series of products do not support CC mode, CR mode is recommended.
6. In case of long input lines or hot plug-in requirements, we recommended to use an external low ESR capacitor
(22uF) near to the converter’s input pins.
Power Derating Curve
Power Derating Curve
Output Power (%)
120
100
80
60
40
20
0
-40
-20
0
20
40
60
85
80
105
100
120
Ambient Temp.TA ()
Mechanical Dimensions
Single
output
A_LS-2WR2
DKB2-05S1PH3
DATE CODE
Dual output
B_LS-2WR2
DKB2-05D1PH3
DATE CODE
Pin Assignment
Pin Single Dual
1
+Vin
2
-Vin
+Vin
-Vin
5
-Vout
-Vout
6
No pin
Common
7
+Vout
+Vout
Unit: mm (inch)
Pin section tolerances:±0.1(±0.004)
General tolerances:±0.5(±0.02)
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A0 (19/04)
Page 4 of 7
DKB2PH3 Series 2 Watt
isolated DC-DC Converters
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
4.5~9V
12V nominal input
9~18V
24V nominal input
18~36V
48V nominal input
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
x100%
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Vout:Output voltage
Vout(nominal):Nominal output voltage
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Page 5 of 7
DKB2PH3 Series 2 Watt
isolated DC-DC Converters
6. Line regulation:
Narrow input voltage range(±10%)and unregulated output voltage series.
│
│
Line regulation=
Ä Vout
Ä Vin
Ä Vout = 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
Ä Vin = 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
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A0 (19/04)
Page 6 of 7
DKB2PH3 Series 2 Watt
isolated DC-DC Converters
Output Ripple&Noise measurement test circuit: as shown below.
Copper strip
DC/DC
converter
Co
Load
Oscilloscope
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.
Output Power (%)
120
100
80
60
40
20
0
-40
-20
0
20
40
60
85
80
105
100
120
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.
12. Input souce impedance: The power module should be connected to low ac-impedance input souce.
Highly inductive souce impedances can affect the stability of the power module. In applications where power is
supplied over long lines and output loading is high , it maybe necessary to use a capacitor at the input to ensure
startup. Capacitor mounted close to the power module helps ensure stability of the unit , it is commended to use
a good quality low Equivalent Series Resistance ( ESR < 0.1Ω at 100KHz ) capacitor of a 22uF for the power
module.
DC
Power Supply
Cin
DC/DC
converter
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Load
A0 (19/04)
Page 7 of 7
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