OKI-T/3-W40P-C Murata Power Solutions Inc, OKI-T/3-W40P-C Datasheet - Page 5

• Manufacturer Part Number: OKI-T/3-W40P-C
• Description: CONV DC/DC 3A 15W 24VIN SMD
• Manufacturer: Murata Power Solutions Inc
• Series: Okami™ OKI-T/3-W40r
• Type: Point of Load (POL) Non-Isolatedr

Specifications of OKI-T/3-W40P-C

• Output: 0.75 ~ 5.5V
• Number Of Outputs: 1
• Power (watts): 15W
• Mounting Type: Surface Mount
• Voltage - Input: 16 ~ 40V
• Package / Case: 5-SMD Module
• 1st Output: 0.75 ~ 5.5 VDC @ 3A
• Size / Dimension: 0.82" L x 0.47" W x 0.34" H (20.8mm x 11.9mm x 8.5mm)
• Power (watts) - Rated: 15W
• Operating Temperature: -40°C ~ 85°C
• Efficiency: 88%
• Approvals: EN, IEC, UL
• Dc / Dc Converter O/p Type: Variable
• No. Of Outputs: 1
• Input Voltage: 16VDC To 40VDC
• Power Rating: 15W
• Output Voltage: 5.5V
• Output Current: 3A
• Supply Voltage: 24V
• Product: Non-Isolated / POL
• Output Power: 15 W
• Input Voltage Range: 16 V to 40 V
• Input Voltage (nominal): 24 V
• Output Voltage (channel 1): 0.7525 V to 5.5 V
• Output Current (channel 1): 3 A
• Package / Case Size: 11.9 mm x 20.8 mm x 8.5 mm
• Screening Level: Industrial
• Product Height (mm): 8.5mm
• Mounting Style: Surface Mount
• Pin Count: 5
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• 3rd Output: -
• 2nd Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Specifi cation Notes, Cont.:
(5)
(6)
(7)
(8)
(9)
(10) Regulation specifi cations describe the deviation as the line input voltage or output load current is varied
(11) Other input or output voltage ranges will be reviewed under scheduled quantity special order.
(12) Maximum PC board temperature is measured with the sensor in the center of the converter.
(13) Do not exceed maximum power specifi cations when adjusting the output trim.
(14) The maximum output capacitive loads depend on the the Equivalent Series Resistance (ESR) of the external
(15) Do not allow the input voltage to degrade lower than the input undervoltage shutdown voltage at all times.
(16) The outputs are not intended to sink appreciable reverse current.
(17) “Hiccup” overcurrent operation repeatedly attempts to restart the converter with a brief, full-current output.
Output Voltage Adustment
The output voltage may be adjusted over a limited range by connecting an
external trim resistor (Rtrim) between the Trim pin and Ground. The Rtrim
resistor must be a 1/10 Watt precision metal fi lm type, ±1% accuracy or
better with low temperature coeffi cient, ±100 ppm/oC. or better. Mount the
resistor close to the converter with very short leads or use a surface mount
trim resistor.
specifi ed limits of the output voltage or the converter’s maximum power
rating when applying these resistors. Also, avoid high noise at the Trim
input. However, to prevent instability, you should never connect any capaci-
tors to Trim.
Resistor Trim Equation:
R
In the tables below, the calculated resistance is given. Do not exceed the
Output Voltage
TRIM
to -Input Common. A logic gate may also be used by applying appropriate external voltages which do not
exceed +Vin.
Short circuit shutdown begins when the output voltage degrades approximately 2% from the selected
setting.
For Vout = 1V, Vin must not exceed 32V. For Vout = 0.75V, Vin must not exceed 24V.
Output noise may be further reduced by adding an external fi lter. At zero output current, the output may
contain low frequency components which exceed the ripple specifi cation. The output may be operated
indefi nitely with no load.
All models are fully operational and meet published specifi cations, including “cold start” at –40˚ C.
from a nominal midpoint value to either extreme.
output capacitor and, to a lesser extent, the distance and series impedance to the load. Larger caps will
reduce output noise but may change the transient response. Newer ceramic caps with very low ESR may
require lower capacitor values to avoid instability. Thoroughly test your capacitors in the application. Please
refer to the Output Capacitive Load Application Note.
Otherwise, you risk having the converter turn off. The undervoltage shutdown is not latching and will
attempt to recover when the input is brought back into normal operating range.
If the overcurrent condition still exists, the restart current will be removed and then tried again. This short
current pulse prevents overheating and damaging the converter. Once the fault is removed, the converter
immediately recovers normal operation.
3.3 V.
2.5 V.
2.0 V.
1.8 V.
1.5 V.
1.2 V.
1.0 V.
0.7525 V.
The On/Off Control Input should use either a switch or an open collector/open drain transistor referenced
(:) = _____________ – 1000
V
OUT
10500
– 0.7525V
Calculated Rtrim (KΩ)
∞ (open)
13.047
22.464
41.424
3.122
5.009
7.417
9.024
www.murata-ps.com
Adjustable Output 3-Amp DOSA-SMT DC/DC Converters
Soldering Guidelines
Murata Power Solutions recommends the specifi cations below when installing these
converters. These specifi cations vary depending on the solder type. Exceeding these
specifi cations may cause damage to the product. Your production environment
may differ therefore please thoroughly review these guidelines with your process
engineers.
Recommended Lead-free Solder Refl ow Profi le
250
200
150
100
High trace = normal upper limit
Low trace - normal lower limit
50
0
0
For Sn/Ag/Cu based solders:
Preheat Temperature
Time over Liquidus
Maximum Peak Temperature
Cooling Rate
For Sn/Pb based solders:
Preheat Temperature
Time over Liquidus
Maximum Peak Temperature
Cooling Rate
Reflow Solder Operations for surface-mount products (SMT)
30
<1.5° C/sec
60
27 May 2010
90
OKI-T/3-W40 Series
Preheating Zone
240 sec max
Soaking Zone
120
Peak Temp.
120 sec max
235-260° C
MDC_OKI-T/3-W40 Series.A02 Page 5 of 13
Time (sec)
Less than 1 ºC. per second
45 to 75 seconds
260 ºC.
Less than 3 ºC. per second
Less than 1 ºC. per second
60 to 75 seconds
235 ºC.
Less than 3 ºC. per second
150
180
email: [e-mail]
time above 217° C
Reflow Zone
45-75 sec
210
240
270
300