120V AC input and 24.5V output LED Driver

(ACTIVE) PMP7770

Description & Features

Technical Documents

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Description

It is an offline AC-DC LED driver. It has TRIAC dimming capability. It is basically a low side buck which has valley filled PFC. It takes an input voltage of 120V AC. This circuit uses LM3445 which is an adaptive constant off-time AC/DC buck (step-down) constant current controller designed to be compatible with Traic dimmers.

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Bill of Materials (BOM)

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Parametrics
 PMP7770.1
(Output Voltage 1)
Vin (Min) (V)120
Vin (Max) (V)120
Vout (Nom) (V)24.5
Iout (Max) (A)1
Output Power (W)24.5
Isolated/Non-IsolatedNon-Isolated
Input TypeAC
TopologyBuck- PFC

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM3445  Triac Dimmable Offline LED Driver  LED drivers  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM3445 Download Download
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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views
PDF 833 09 Jan 2012 4
Design files (2)
Title Abstract Type Size (KB) Date Views
PDF 96 09 Jan 2012 4
PDF 169 09 Jan 2012 6

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