LM3447MTE/NOPB
ActivePHASE DIMMABLE, PRIMARY SIDE POWER REGULATED, PFC FLYBACK CONTROLLER FOR LED LIGHTING
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LM3447MTE/NOPB
ActivePHASE DIMMABLE, PRIMARY SIDE POWER REGULATED, PFC FLYBACK CONTROLLER FOR LED LIGHTING
Technical Specifications
Parameters and characteristics for this part
| Specification | LM3447MTE/NOPB |
|---|---|
| Applications | Lighting |
| Dimming | TRIAC |
| Internal Switch(s) | False |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | 14-TSSOP |
| Package / Case [custom] | 0.173 " |
| Package / Case [custom] | 4.4 mm |
| Supplier Device Package | 14-TSSOP |
| Topology | Flyback |
| Type | AC DC Offline Switcher |
| Voltage - Output | 19 V |
| Voltage - Supply (Max) [Max] | 17.5 V |
| Voltage - Supply (Min) [Min] | 7.5 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 1.61 | |
| 10 | $ 1.45 | |||
| 25 | $ 1.37 | |||
| 100 | $ 1.16 | |||
| Digi-Reel® | 1 | $ 1.61 | ||
| 10 | $ 1.45 | |||
| 25 | $ 1.37 | |||
| 100 | $ 1.16 | |||
| Tube | 1 | $ 1.61 | ||
| 10 | $ 1.45 | |||
| 25 | $ 1.37 | |||
| 100 | $ 1.16 | |||
| 250 | $ 1.09 | |||
| 500 | $ 0.96 | |||
| 1000 | $ 0.79 | |||
| 2500 | $ 0.74 | |||
| 5000 | $ 0.71 | |||
| Texas Instruments | SMALL T&R | 1 | $ 1.21 | |
| 100 | $ 1.00 | |||
| 250 | $ 0.72 | |||
| 1000 | $ 0.54 | |||
Description
General part information
LM3447 Series
The LM3447 is a versatile power factor correction (PFC) controller designed to meet the performance requirements of residential and commercial phase-cut dimmer compatible LED lamp drivers. The device incorporates a phase decoder circuit and an adjustable hold current circuit to provide smooth, flicker free dimming operation. A proprietary primary side control technique based on input voltage feedforward is used to regulate the input power drawn by the LED driver and to achieve line regulation over a wide range of input voltage. Valley switching operation is implemented to minimize switching loss and reduce EMI. An internal thermal foldback circuit is provided to protects the LEDs from damage based on the temperature sensed by a single external NTC resistor. Additional features include LED open circuit and short circuit protection, cycle-by-cycle FET over-current protection, burst mode fault operation using an internal 812ms fault timer and internal thermal shutdown.
The LM3447 is ideal for implementing dimmable, isolated single stage LED lamp drivers where simplicity, low-component count and small solution size are of primary importance. This device is currently available in a TSSOP 14-pin package.
The LM3447 is a versatile power factor correction (PFC) controller designed to meet the performance requirements of residential and commercial phase-cut dimmer compatible LED lamp drivers. The device incorporates a phase decoder circuit and an adjustable hold current circuit to provide smooth, flicker free dimming operation. A proprietary primary side control technique based on input voltage feedforward is used to regulate the input power drawn by the LED driver and to achieve line regulation over a wide range of input voltage. Valley switching operation is implemented to minimize switching loss and reduce EMI. An internal thermal foldback circuit is provided to protects the LEDs from damage based on the temperature sensed by a single external NTC resistor. Additional features include LED open circuit and short circuit protection, cycle-by-cycle FET over-current protection, burst mode fault operation using an internal 812ms fault timer and internal thermal shutdown.
Documents
Technical documentation and resources
