LM3424BKBSTEVAL/NOPB National Semiconductor, LM3424BKBSTEVAL/NOPB Datasheet - Page 9

• 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

14. OUTPUT OVLO
Solve for R
The closest standard resistor is 499 kΩ therefore V
Solve for R
The closest standard resistor is 15.8 kΩ making V
The chosen components from step 14 are:
Typical Waveforms
T
A
= +25°C, V
OV2
OV1
IN
:
:
TP1 switch node voltage (V
= 24V and V
STANDARD OPERATION
LED current (I
O
= 21V.
LED
)
SW
)
TURN-OFF
HYSO
30096882
is:
:
9
15. SOFT-START
Solve for t
If t
Solve for C
The chosen component from step 15 is:
SU
is less than t
SU
SS
:
:
200Hz 50% PWM DIMMING
TP5 dim voltage (V
TSU
LED current (I
, solve for t
SU-SS-BASE
LED
DIM
)
)
:
www.national.com
30096883