LM3431EVAL National Semiconductor, LM3431EVAL Datasheet - Page 5

• Manufacturer Part Number: LM3431EVAL
• Description: BOARD EVAL FOR LM3431 LED DRIVER
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM3431EVAL

• Current - Output / Channel: 140mA
• Outputs And Type: 4, Non-Isolated
• Features: Dimmable
• Voltage - Input: 8 ~ 18V
• Utilized Ic / Part: LM3431
• Kit Contents: Board, Datasheet
• Svhc: No SVHC (15-Dec-2010)
• Kit Features: Designed To Drive 4 Parallel Strings Of 8 Series LEDs At 140mA Per String From An Input 8V To 18V
• Mcu Supported Families: LM3431
• Rohs Compliant: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Voltage - Output: -
• Lead Free Status / Rohs Status: Supplier Unconfirmed

Typical Evaluation Board Performance
Unless otherwise specified, the following conditions apply: Vin = 12V, Ta = 25°C, LED array = 4 parallel strings of 8 LEDs at 140mA
per string. LED part number: Nichia NFSW036BT.
FIGURE 3. Maximum Contrast Ratio vs. Dimming
FIGURE 4. Power-On Startup Waveforms
FIGURE 5. Fault Delay Waveforms
(one LED open)
Frequency
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FIGURE 7. Typical Dimming Waveforms
FIGURE 8. Boost Switching Waveforms
FIGURE 6. Efficiency vs. Input Voltage
(1kHz at 1% duty)
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