LM3424BSTEVAL National Semiconductor, LM3424BSTEVAL Datasheet - Page 32

• Manufacturer Part Number: LM3424BSTEVAL
• Description: LM3424 Constant Current N-Channel Controller with Thermal Foldback for Driving LEDs; Qty per Container: 1/
• Manufacturer: National Semiconductor

www.national.com
6. OUTPUT CAPACITANCE
Solve for C
The closest capacitance totals 40 µF therefore Δi
Determine minimum allowable RMS current rating:
The chosen components from step 6 are:
7. PEAK CURRENT LIMIT
Solve for R
The closest standard resistor is 0.04 Ω therefore I
The chosen component from step 7 is:
8. SLOPE COMPENSATION
Solve for R
The chosen component from step 8 is:
O
LIM
SLP
:
:
:
LED-PP
LIM
is:
is:
32
9. LOOP COMPENSATION
ω
ω
T
To ensure stability, calculate ω
Solve for C
To attenuate switching noise, calculate ω
Assume R
The chosen components from step 9 are:
U0
P1
Z1
is approximated:
is approximated:
is approximated:
FS
CMP
= 10Ω and solve for C
:
P2
:
FS
:
P3
: