LM3424MH/NOPB National Semiconductor, LM3424MH/NOPB Datasheet - Page 35

• Manufacturer Part Number: LM3424MH/NOPB
• Description: IC LED DVR BUCK/BOOST 20-TSSOP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: High Power, Constant Currentr

Specifications of LM3424MH/NOPB

• Constant Current: Yes
• Topology: Flyback, PWM, SEPIC, Step-Down (Buck), Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: No
• Type - Primary: Automotive
• Type - Secondary: High Brightness LED (HBLED)
• Frequency: 2MHz
• Voltage - Supply: 4.5 V ~ 75 V
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP Exposed Pad, 20-eTSSOP, 20-HTSSOP
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 1A
• Internal Switch(s): Yes
• Efficiency: 96%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Other names: LM3424MH

Applications Information
The following designs are provided as reference circuits. For a specific design, the steps in the Design Procedure section should
be performed. In all designs, an RC filter (0.1 µF, 10Ω) is recommended at VIN placed as close as possible to the LM3424 device.
This filter is not shown in the following designs.
DESIGN #2 - BOOST Application
Features
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Input: 8V to 28V
Output: 9 LEDs at 1A
65°C - 100°C Thermal Foldback
PWM Dimming up to 30kHz
700 kHz Switching Frequency
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