LM3429BSTEVAL/NOPB National Semiconductor, LM3429BSTEVAL/NOPB Datasheet - Page 7

• Manufacturer Part Number: LM3429BSTEVAL/NOPB
• Description: BOARD EVAL FOR BOOST LM3429
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM3429BSTEVAL/NOPB

• Current - Output / Channel: 1A
• Outputs And Type: 1, Non-Isolated
• Features: Dimmable
• Voltage - Input: 10 ~ 26 V
• Utilized Ic / Part: LM3429
• Core Chip: LM3429
• Topology: Buck-Boost
• No. Of Outputs: 1
• Dimming Control Type: PWM / Analog
• Development Tool Type: Hardware - Eval/Demo Board
• Mcu Supported Families: LM3429 Family
• Msl: MSL 1 - Unlimited
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption
• Voltage - Output: -
• Other names: *LM3429BSTEVAL; *LM3429BSTEVAL/NOPB; LM3429BSTEVAL

9. NFET
Determine minimum Q1 voltage rating and current rating:
A 100V NFET is chosen with a current rating of 40A due to
the low R
The chosen component from step 9 is:
10. 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 10 is:
11. INPUT UVLO
Since PWM dimming will be evaluated a three resistor net-
work will be used. Assume R13 = 10 kΩ and solve for R5:
The closest standard resistor is 1.43 kΩ therefore V
is:
DS-ON
= 50 mΩ. Determine I
D
:
T-RMS
and P
T
:
TURN-ON
D
=
7
Solve for R4:
The closest standard resistor is 16.9 kΩ making V
The chosen components from step 11 are:
12. OUTPUT OVLO
Solve for R18:
The closest standard resistor is 750 kΩ therefore V
Solve for R11:
The closest standard resistor is 15.8 kΩ making V
The chosen components from step 12 are:
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HYS
TURN-OFF
HYSO
:
is:
: