RDR-131 Datasheet, PDF (13/24 Pages) Power Integrations, Inc. – Reference Design Report for 3 W Non- Isolated Constant Current LED Driver Using LNK306DN

7-Mar-07
RDR-131 LED Driver – LNK306DN
OUTPUT CAPACITOR
DELTA_V
MAX_ESR
I RIPPLE
0.12 Volts Target Output Voltage Ripple
467 m- Maximum Capacitor ESR (milli-Ohms)
Ohm
s
0.26 Amps Output Capacitor Ripple current
FEEDBACK COMPONENTS
RBIAS
RFB
CFB
C_SOFT_START
2.00 k- Bias Resistor. Use closest standard 1% value
Ohm
s
11.86 k- Feedback Resistor. Use closest standard 1% value
Ohm
s
10 uF Feedback Capacitor
39092 uF If the output Voltage is greater than 12 V, or total output
and system capacitance is greater than 100 uF, a soft
start capacitor between 1uF and 10 uF is recommended.
See AN-37 for details
Note: The feedback components in the spreadsheet were not used on the power supply
because a higher impedance was required by the CC feedback circuit.
Page 13 of 24
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