LM3424BKBSTEVAL/NOPB National Semiconductor, LM3424BKBSTEVAL/NOPB Datasheet - Page 32

• Manufacturer Part Number: LM3424BKBSTEVAL/NOPB
• Description: BOARD EVAL BUCK BOOST LM3424
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM3424BKBSTEVAL/NOPB

• Current - Output / Channel: 1A
• Outputs And Type: 1, Non-Isolated
• Features: Dimmable
• Voltage - Input: 10 ~ 70 V
• Utilized Ic / Part: LM3424
• Core Chip: LM3424
• Topology: Buck-Boost
• No. Of Outputs: 1
• Dimming Control Type: PWM / Analog
• Development Tool Type: Hardware - Eval/Demo Board
• Mcu Supported Families: LM3424 Family
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Other names: LM3424BKBSTEVAL

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
: