Datasheet
Package Availability, Models, Samples & Pricing
| Part Number | Package | Factory Lead Time | Models | Samples &
Electronic
Orders | Budgetary Pricing | Std
Pack
Size | Package
Marking
Format |
| Type | Pins | Spec. | MSL
Rating | Peak
Reflow | RoHS
Report | CAD
Symbols | Weeks | Qty | Qty | $US each |
| LM3433EVALKIT | evaluation board | Obsolete | N/A
|
| 1+ | $300.00 | 1 | - |
| 8 weeks | N/A |
| LM3433SQ-36AEV | Evaluation Board for the LM3433 10A to 40A LED Driver | Full production | N/A
|
| 1+ | $200.00 | 1 | - |
| 8 weeks | N/A |
| LM3433SQ-14AEV | LM3433 4A to 20A LED Driver Evaluation Board | Full production | N/A
|
| 1+ | $117.00 | 1 | - |
| 6 weeks | N/A |
| LM3433SQ | LLP | 24 | NOPB | 1 | 260 | RoHS |
N/A |
Full production | N/A
| 
| 1K+ | $2.50 | reel
of
1000 | NS
UZXYTT
L3433SQ |
| 6 weeks | N/A |
| LM3433SQX | LLP | 24 | NOPB | 1 | 260 | RoHS |
N/A |
Full production | N/A
|
| 1K+ | $2.50 | reel
of
4500 | NS
UZXYTT
L3433SQ |
| 6 weeks | N/A |
General Description
The LM3433 is an adaptive constant on-time DC/DC buck (step-down) constant current controller (a true current source). The
LM3433 provides a constant current for illuminating high power LEDs. The output configuration allows the anodes of multiple
LEDs to be tied directly to the ground referenced chassis for maximum heat sink efficacy. The high frequency capable architecture
allows the use of small external passive components and no output capacitor while maintaining low LED ripple current. Two
control inputs are used to modulate LED brightness. An analog current control input is provided so the LM3433 can be adjusted
to compensate for LED manufacturing variations and/or color temperature correction. The other input is a logic level PWM control
of LED current. The PWM functions by shorting out the LED with a parallel switch allowing high PWM dimming frequencies. High
frequency PWM dimming allows digital color temperature control, interference blanking, field sequential illumination, and
brightness control. Additional features include thermal shutdown, VCC under-voltage lockout, and logic level shutdown mode. The LM3433 is available in a low profile LLP-24 package.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
|
LM3433SQ | ABCD150 | 0 | 31520 | 0 | 0 | 3739000 | 1 | 1060951459
|
|
LM3433SQX | ABCD150 | 0 | 31520 | 0 | 0 | 3739000 | 1 | 1060951459
|
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.
Application Notes
| Title | Size in Kbytes |
Date |
 |
| AN-1736: Application Note 1736 LM3433 HB LED Driver Evaluation Kit |
1011 Kbytes |
4-Feb-08 |
Download |
| AN-1937: Application Note 1937 LM3433 10A to 40A LED Driver Evaluation Board |
1559 Kbytes |
25-Mar-09 |
Download |
| AN-1793: Application Note 1793 LM3433 4A to 20A LED Driver Evaluation Board |
701 Kbytes |
25-Aug-08 |
Download |
AN-1793 (Chinese): Application Note 1793 LM3433 4A to 20A LED Driver Evaluation Board
|
591 Kbytes |
|
 |
More Application Notes
| Title | Size in Kbytes |
Date |
|
| AN-1679: Application Note 1679 LED Backlighting Solution with LM3430 and LM3432 |
2763 Kbytes |
18-Sep-07 |
Download |
| AN-1907: Application Note 1907 LM3423 Buck-Boost Configuration Evaluation Board |
879 Kbytes |
8-Dec-08 |
Download |
| AN-1764: Application Note 1764 LM3431 Evaluation Board |
588 Kbytes |
10-Jan-08 |
Download |
AN-1764 (Chinese): Application Note 1764 LM3431 Evaluation Board
|
983 Kbytes |
|
|
| AN-1529: Application Note 1529 LM3430 Evaluation Board |
2770 Kbytes |
21-Aug-07 |
Download |
AN-1529 (Chinese): Application Note 1529 LM3430 Evaluation Board
|
789 Kbytes |
|
|
[Information as of 3-Jul-2009]
|
RoHS Compliance Information