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LM3421 Datasheet(PDF) 44 Page - Texas Instruments |
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LM3421 Datasheet(HTML) 44 Page - Texas Instruments |
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44 / 65 page  CO D1 ROV2 ROV1 RSNS RFS CFS COV 8V ± 28V 1A ILED Q2 OVP nDIM LM3421 AGND VIN PGND DDRV DAP GATE EN COMP VIN CSH RCT IS HSP RPD VCC HSN L1 CBYP RLIM Q1 CCMP RCSH RT RUV2 RUV1 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 RHSN RHSP Q3 PWM RUVH CT CIN D2 LM3421, LM3421-Q1 LM3423, LM3423-Q1 SNVS574D – JULY 2008 – REVISED SEPTEMBER 2011 www.ti.com 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, 10 Ω) is recommended at VIN placed as close as possible to the LM3421/23 device. This filter is not shown in the following designs. DESIGN #2 - LM3421 BOOST Application Features • Input: 8V to 28V • Output: 9 LEDs at 1A • PWM Dimming up to 30kHz • 700 kHz Switching Frequency 44 Submit Documentation Feedback Copyright © 2008–2011, Texas Instruments Incorporated Product Folder Links: LM3421 LM3421-Q1 LM3423 LM3423-Q1 |
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