LM3429MH/NOPB
ActiveSIMPLE N-CHANNEL CONTROLLER FOR CONSTANT CURRENT LED DRIVERS
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LM3429MH/NOPB
ActiveSIMPLE N-CHANNEL CONTROLLER FOR CONSTANT CURRENT LED DRIVERS
Technical Specifications
Parameters and characteristics for this part
| Specification | LM3429MH/NOPB |
|---|---|
| Dimming | Analog, PWM |
| Frequency | 2 MHz |
| 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-PowerTSSOP |
| Package / Case [x] | 0.173 in |
| Package / Case [y] | 4.4 mm |
| Supplier Device Package | 14-HTSSOP |
| Topology | SEPIC, Step-Down (Buck), Step-Up (Boost) |
| Type | DC DC Controller |
| Voltage - Supply (Max) [Max] | 75 V |
| Voltage - Supply (Min) [Min] | 4.5 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tube | 1 | $ 1.97 | |
| 10 | $ 1.77 | |||
| 94 | $ 1.45 | |||
| 282 | $ 1.37 | |||
| 564 | $ 1.31 | |||
| LCSC | Piece | 1 | $ 3.15 | |
| 10 | $ 3.09 | |||
| 30 | $ 3.04 | |||
| 94 | $ 2.65 | |||
| Texas Instruments | TUBE | 1 | $ 2.11 | |
| 100 | $ 1.85 | |||
| 250 | $ 1.30 | |||
| 1000 | $ 1.04 | |||
Description
General part information
LM3429-Q1 Series
The LM3429 is a versatile high voltage N-channel MosFET controller for LED drivers. It can be easily configured in buck, boost, buck-boost and SEPIC topologies. This flexibility, along with an input voltage rating of 75V, makes the LM3429 ideal for illuminating LEDs in a very diverse, large family of applications.
Adjustable high-side current sense voltage allows for tight regulation of the LED current with the highest efficiency possible. The LM3429 uses Predictive Off-time (PRO) control, which is a combination of peak current-mode control and a predictive off-timer. This method of control eases the design of loop compensation while providing inherent input voltage feed-forward compensation.
The LM3429 includes a high-voltage startup regulator that operates over a wide input range of 4.5 V to 75 V. The internal PWM controller is designed for adjustable switching frequencies of up to 2 MHz, thus enabling compact solutions. Additional features include analog dimming, PWM dimming, overvoltage protection, undervoltage lock-out, cycle-by-cycle current limit, and thermal shutdown.
Documents
Technical documentation and resources
