LM3424BSTEVAL National Semiconductor, LM3424BSTEVAL Datasheet - Page 33
![no-image](/images/manufacturer_photos/0/4/469/national_semiconductor_sml.jpg)
LM3424BSTEVAL
Manufacturer Part Number
LM3424BSTEVAL
Description
LM3424 Constant Current N-Channel Controller with Thermal Foldback for Driving LEDs; Qty per Container: 1/
Manufacturer
National Semiconductor
Datasheet
1.LM3424BSTEVAL.pdf
(50 pages)
- Current page: 33 of 50
- Download datasheet (2Mb)
10. INPUT CAPACITANCE
Solve for the minimum C
To minimize power supply interaction a 200% larger capaci-
tance of approximately 20 µF is used, therefore the actual
Δv
selection is limited, four 4.7 µF X7R capacitors are chosen.
Determine minimum allowable RMS current rating:
The chosen components from step 10 are:
11. NFET
Determine minimum Q1 voltage rating and current rating:
A 100V NFET is chosen with a current rating of 32A due to
the low R
The chosen component from step 11 is:
12. DIODE
Determine minimum D1 voltage rating and current rating:
A 100V diode is chosen with a current rating of 12A and V
600 mV. Determine P
The chosen component from step 12 is:
IN-PP
is much lower. Since high voltage ceramic capacitor
DS-ON
= 50 mΩ. Determine I
D
:
IN
:
T-RMS
and P
T
:
D
=
33
13. INPUT UVLO
Solve for R
The closest standard resistor is 150 kΩ therefore V
Solve for R
The closest standard resistor is 21 kΩ making V
The chosen components from step 13 are:
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:
UV2
UV1
OV2
OV1
:
:
:
:
TURN-ON
www.national.com
TURN-OFF
HYS
HYSO
is:
:
is:
:
Related parts for LM3424BSTEVAL
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![LM342](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
3-Terminal Positive Regulators
Manufacturer:
National Semiconductor
Datasheet:
![MC1408P8](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
National Semiconductor [8-Bit D/A Converter]
Manufacturer:
National Semiconductor
Datasheet:
![CS1301](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
National Semiconductor [Media Coprocessor]
Manufacturer:
National Semiconductor
Datasheet:
![LM4832N](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound
Manufacturer:
National Semiconductor
Datasheet:
![LM4832M](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound
Manufacturer:
National Semiconductor
Datasheet:
![LM4546](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
AC97 Rev 2 Codec with Sample Rate Conversion and National 3D Sound
Manufacturer:
National Semiconductor
![LP2981AIM5X-2.7](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Manufacturer:
National Semiconductor
Datasheet:
![LP3988IMFX-2.6](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Manufacturer:
National Semiconductor
Datasheet:
![LPV321M7X](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
General Purpose, Low Voltage, Low Power, Rail-to-Rail Output Operational Amplifiers
Manufacturer:
National Semiconductor
Datasheet:
![ADC0882CCN](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
8-bit 20 MSPS flash A/D converter.
Manufacturer:
National Semiconductor
Datasheet:
![LM837N](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Low Noise Quad Operational Amplifier
Manufacturer:
National Semiconductor
Datasheet:
![DS3650J](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Quad Differential Line Receivers
Manufacturer:
National Semiconductor
Datasheet:
![DS3662J](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Quad High Speed Trapezoidal? Bus Transceiver
Manufacturer:
National Semiconductor
Datasheet:
![DS7820A](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Dual Line Receiver
Manufacturer:
National Semiconductor
Datasheet: