Page 3 - MPD MD300ERW Datasheet
P. 3



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Typical Connection





















For applications that require meeting EMC standards, the diagram above 6. Recommended values for components are: 7. The drawings below show typical board layouts for the EMC/
illustrates a typical connection of the MD300xERW series. The units Component EMI circuit shown above (one for single output models and
do not require external components to operate as specifi ed. Some notes 5 VIN 12 VIN 24 VIN 48 VIN one for dual output units).
on this diagram (starting with the input circuit) are: MOV --- --- S14K35 S14K60 8. In many applications simply adding input/output
1. An external fuse should be used in all power module applications. LDM1 --- --- 56 µH 56 µH capacitors will enhance the input surge protection
The recommended fuse is shown in the model chart on page 2. TVS SMCJ13A SMCJ28A SMCJ48A SMCJ90A and reduce output ripple suffi ciently. The value of
2. To protect against a surge, an external MOV is recommended on the C1 680 µF/16V 680 µF/25V 330 µF/50V 330 µF/100V the input capacitor can range from 10 µF to 100 µF,
input. A suggested value is given in the table at right. depending on the needs of the application. The output
C2 4.7 µF/50V 4.7 µF/50V 4.7 µF/50V 4.7 µF/100V
3. To protect against voltage spikes, it is recommended that a TVS be capacitor would typically be 100 µF.
used on the input. A suggested value is given in the table at right. LDM2 12 µH 12 µH 12 µH 12 µH 9. The capacitor CS provides additional output fi ltering.
4. The capacitor CS is required to meet all specifi cations on single output C3 4.7 µF/50V 4.7 µF/50V 4.7 µF/50V 4.7 µF/100V If used, a value of 10 µF to 20 µF is recommended. This
units. CY 1nF/2 kV 1nF/2 kV 1nF/2 kV 1nF/2 kV
5. The output fi ltering capacitor (C4) is a high frequency, low resistance capacitor is not required for specifi ed operation.
CS 10 µF - 22 µF
electrolytic capacitor. Care must be taken in choosing this capacitor
not to exceed the capacitive load specifi cation for the unit. Voltage C4 100 µF 100 µF 100 µF 100 µF
derating of capacitors should be 80% or above.
Typical Board Layout: With External Filter/Surge Components for Single Output Unit























Typical Board Layout: With External Filter/Surge Components for Dual Output Unit





















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