LM3429 N-Channel Controller for Constant Current LED Drivers | TI.com

LM3429 (ACTIVE) N-Channel Controller for Constant Current LED Drivers

 

Recommended alternative parts

  • TPS92691  -  Multi-topology LED driver controller with high-side and low-side current sense, precision dimming and continuous LED monitoring

Description

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.

Features

  • LM3429-Q1 is AEC-Q100 Grade 1 Qualified for
    Automotive Applications
  • VIN Range From 4.5 V to 75 V
  • Adjustable Current Sense Voltage
  • High-Side Current Sensing
  • 2-Ω, 1-A Peak MosFET Gate Driver
  • Input Undervoltage Protection
  • Overvoltage Protection
  • PWM Dimming
  • Analog Dimming
  • Cycle-by-Cycle Current Limit
  • Programmable Switching Frequency
  • Low Profile 14-lead HTSSOP Package
  • Thermal Shutdown

WEBENCH® Designer LM3429

  V in Lower V in Upper
4.5 ≤  V  V ≤ 75.0
Ambient Temp  °C ≤ 125°C
Light Output (optional)  Lumens

Parametrics

Compare all products in General lighting LED drivers Email Download to Excel
Part number Order Input voltage (type) Vin (Min) (V) Vin (Max) (V) Iout (Max) (A) Vout (Min) (V) Vout (Max) (V) Regulated outputs (#) Topology Dimming method Power factor correction (Min) Type Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Vref (V) UVLO thresholds on/off (V) Features Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
LM3429 Order now DC/DC     4.5     75     5     3     72     1     Boost
Boost Controller
Buck-Boost    
Analog
PWM    
    Controller
Inductive    
100     2000     1.6     1.24     4.17 / 4.08     Adjustable Switch Frequency
Enable/Shutdown
Thermal Shutdown    
-40 to 125     HTSSOP | 14     14HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 14)    
LM3429-Q1 Order now DC/DC     4.5     75     5     3     72     1     Boost Controller
Buck-Boost Controller
Sepic Controller    
Analog
PWM    
  Inductive     100     2000     1.6       4.17 / 4.08     Adjustable Switch Frequency
Enable/Shutdown
Thermal Shutdown    
-40 to 125     HTSSOP | 14     14HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 14)