Datasheet
Package Availability, Models, Samples & Pricing
General 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 4.5V to 75V. The internal PWM
controller is designed for adjustable switching frequencies of up to 2.0 MHz, thus enabling compact solutions. Additional
features include analog dimming, PWM dimming, over-voltage protection, under-voltage lock-out, cycle-by-cycle current limit,
and thermal shutdown.
The LM3429 comes in a low profile, thermally efficient TSSOP EP 14-lead package.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
|
LM3429MH | ABCD150XV1 | 0 | 3868 | 0 | 0 | 2595000 | 2 | 736338335
|
|
LM3429MHX | ABCD150XV1 | 0 | 3868 | 0 | 0 | 2595000 | 2 | 736338335
|
Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR.
The Long Term Failure Rates were calculated
at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress
temperature of 150°C to an application temperature of 55°C.
For more information on Reliability Metrics, please click here.
Reference Designs
Application Notes
| Title | Size in Kbytes |
Date |
 |
| AN-1986: Application Note 1986 LM3429 Boost Evaluation Board |
672
Kbytes |
3-Aug-09 |
Download |
| AN-1985: Application Note 1985 LM3429 Buck-Boost Evaluation Board |
705
Kbytes |
3-Aug-09 |
Download |
| AN-1969: Application Note 1969 LM3424 Boost Evaluation Board |
988
Kbytes |
22-Aug-09 |
Download |
| AN-1967: Application Note 1967 LM3424 Buck-Boost Evaluation Board |
1027
Kbytes |
22-Aug-09 |
Download |
More Application Notes
| Title | Size in Kbytes |
Date |
|
| AN-1982: Application Note 1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool |
63
Kbytes |
15-Jul-09 |
Download |
[Information as of 7-Nov-2009]
|
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