RDK-257 Power Integrations, RDK-257 Datasheet - Page 12

• Manufacturer Part Number: RDK-257
• Description: REFERENCE DESIGN LINKSWITCH-PH
• Manufacturer: Power Integrations
• Series: LinkSwitch®-PHr

Specifications of RDK-257

• Design Resources: RDR-257
• Current - Output / Channel: 330mA
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 36V
• Voltage - Input: 90 ~ 265VAC
• Utilized Ic / Part: LNK405EG
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 596-1424

Figure 12. RD-193 7 W Layout Example, Bottom Layer.
Quick Design Checklist
Maximum Drain Voltage
Verify that the peak V
operating conditions including start up and fault conditions.
Maximum Drain Current
Measure the peak drain current under all operation conditions
including start up and fault conditions. Look for signs of
transformer saturation (usually occurs at highest operating
ambient temperatures). Verify that the peak current is less that
stated for the Absolute Maximum Rating in the data sheet.
Thermal Check
At maximum output power, both minimum and maximum line
voltage and ambient temperature; verify that temperature
specifications are not exceeded for the LinkSwitch-PH,
transformer, output diodes, output capacitors and drain clamp
components.
Rev. C 11/10
LNK403-409EG/413-419EG
12
Bridge Rectifier
DS
does not exceed 725 V under all
S
S
BR1
R13
D7
R20
D1
Active Damper
VR2
MOSFET
C13
R12
B3
R17
R4
D6
F1
R18
D1
D5
R7
R5
R9
D3
D2
R6
www.powerint.com
Rectifier
Output
PI-5988-060110