iW3616 and iW3617 Calculator V1.0
W3616/3617 DESIGN CALC For Phase-Cut (TRIAC) Dimmable
COMMENT
Design Specification, 120VAC or 230VAC
Design Specification, 50Hz or 60Hz
Design Specification
Design Specification
Design Specification, typically +-10%
Design Specification, typically +-3Hz
Useful information
Useful information
Useful information
COMMENT
TYP = 1250k ohm
TYP = 3750k ohm
10% accuracy is ok
Recommend to use 85%~90%% of max value
PASS: CHECK OK
COMMENT
Higher Inductance, lower frequency, more turns needed
Design Spec, from inductor core datasheet
More turns, less flux density, higher DCR
PASS: CHECK OK
PASS: CHECK OK
PASS: CHECK OK
Useful information
COMMENT
Recommend to use 13005 BJT
Recommend to use fast recovery diode
TORS
COMMENT
Recommend to use 433V rated or above
Useful information
Useful information
Recommend to use 25V rated or above
Recommend to use 23V rated or above
COMMENT
This will impact FET/Diode voltage ratings
Higher Inductance, lower frequency, more turns needed Design spec, from transformer core datasheet
More turns, less flux density, higher DCR
WARNING: This may saturate the transformer
FAIL: VinTon LIMIT VIOLATED
PASS: CHECK OK
ERROR: frequency is too high/low!
COMMENT
Recommend to use low input capacitance FET
This is for good efficiency
Recommend to use schottky diode
This is for good efficiency
COMMENT
May need to tweak this value after bring up
Useful information, before LDO circuit
Description
Name
Unit
Value
Target boost frequency at AC peak
f_boost_set
kHz
45
CALCULATOR
immable
Ver.1.0
ADVANCED OPTION IN BOOST
Description
Name
Unit Value
Flyback Input Cap Ripple (no dimmer)
V_ripple_target_max
V
15
Description Name
Unit Value
Target Flyback frequency (nominal)
f_flyback_set kHz 100Vsense bottom resistor
Rfvsense_bottom
k ohm 2.4CV voltage as % of max VLED (>100%)
VLED_CV
%
110
ADVANCED OPTION IN CAPACITORS
ADVANCED OPTION IN FLYBACK