EPR-89 Datasheet, PDF (15/32 Pages) Power Integrations, Inc. – Engineering Prototype Report for 2.0 W CV Adapter using LNK362P

08-Nov-2005
EP-89 6.2 V, 322 mA Adapter
TRANSFORMER SECONDARY DESIGN
PARAMETERS
Lumped parameters
ISP
ISRMS
IRIPPLE
CMS
AWGS
DIAS
ODS
INSS
VOLTAGE STRESS
PARAMETERS
1.44 Amps
0.63 Amps
0.54 Amps
125 Cmils
29 AWG
0.29 mm
0.66 mm
0.19 mm
VDRAIN
- Volts
PIVS
FEEDBACK
COMPONENTS
Recommended
Bias Diode
R1
R2
40 Volts
1N4003 -
1N4007
500 -
1000
ohms
200 - 820 ohms
TRANSFORMER SECONDARY DESIGN
PARAMETERS (MULTIPLE OUTPUTS)
1st output
VO1
IO1
PO1
VD1
NS1
ISRMS1
IRIPPLE1
PIVS1
Recommended
Diodes
Pre-Load
Resistor
CMS1
AWGS1
DIAS1
ODS1
6.20 Volts
0.32 Amps
2.00 Watts
0.75 Volts
13.00
0.63 Amps
0.54 Amps
40.03 Volts
UF4001,
SB150
2 k-Ohms
126.56 Cmils
29.00 AWG
0.29 mm
0.66 mm
Peak Secondary Current
Secondary RMS Current
Output Capacitor RMS Ripple Current
Secondary Bare Conductor minimum circular mils
Secondary Wire Gauge (Rounded up to next larger standard
AWG value)
Secondary Minimum Bare Conductor Diameter
Secondary Maximum Outside Diameter for Triple Insulated
Wire
Maximum Secondary Insulation Wall Thickness
For Clampless designs, the Peak Drain Voltage is highly
dependent on Transformer capacitance and leakage
inductance. Please verify this on the bench and ensure that it
is below 650 V to allow 50 V margin for transformer variation.
Output Rectifier Maximum Peak Inverse Voltage
Recommended diode is 1N4003. Place diode on return leg of
bias winding for optimal EMI. See LinkSwitch-XT Design
Guide
CV bias resistor for CV/CC circuit. See LinkSwitch-XT Design
Guide
Resistor to set CC linearity for CV/CC circuit. See LinkSwitch-
XT Design Guide
Main Output Voltage (if unused, defaults to single output
design)
Output DC Current
Output Power
Output Diode Forward Voltage Drop
Output Winding Number of Turns
Output Winding RMS Current
Output Capacitor RMS Ripple Current
Output Rectifier Maximum Peak Inverse Voltage
Recommended Diodes for this output
Recommended value of pre-load resistor
Output Winding Bare Conductor minimum circular mils
Wire Gauge (Rounded up to next larger standard AWG
value)
Minimum Bare Conductor Diameter
Maximum Outside Diameter for Triple Insulated Wire
Page 15 of 32
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