LM3433SQ/NOPB National Semiconductor, LM3433SQ/NOPB Datasheet - Page 7

• Manufacturer Part Number: LM3433SQ/NOPB
• Description: IC LED DRIVER HIGH BRIGHT 24-LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: HBLED Driverr

Specifications of LM3433SQ/NOPB

• Constant Current: Yes
• Topology: PWM, Step-Down (Buck)
• Number Of Outputs: 1
• Internal Driver: No
• Type - Primary: Automotive, Backlight
• Type - Secondary: High Brightness LED (HBLED)
• Frequency: 1MHz
• Voltage - Supply: 3 V ~ 5.8 V
• Mounting Type: Surface Mount
• Package / Case: 24-LLP
• Operating Temperature: -40°C ~ 125°C
• Internal Switch(s): No
• Efficiency: 92%
• For Use With: LM3433SQ-36AEV - BOARD EVALUATION FOR LM3433SQ
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Current - Output / Channel: -
• Other names: LM3433SQTR

I
Top trace: EN input, 2V/div, DC
Middle trace: V
Bottom trace: I
T = 100µs/div
I
Top trace: DIM input, 2V/div, DC
Bottom trace: I
T = 10µs/div
LED
LED
30kHz PWM Dimming Waveform Showing Inductor Ripple
= 6A nominal, V
= 6A nominal, V
LED
LED
EE
input current, 2A/div, DC
, 2A/div, DC
, 2A/div, DC
IN
IN
= 3.3V, V
= 3.3V, V
V
SENSE
Startup Waveform
(ADJ = 1.0V)
EE
EE
vs. Temperature
Current
= -12V, V
= -12V
LED
= 3V, SS = open
30031567
30031566
30031525
7
I
Top trace: EN input, 2V/div, DC
Middle trace: V
Bottom trace: I
T = 100µs/div
LED
= 6A nominal, V
Average LED Current vs. DIM Duty Cycle
LED
EE
(30kHz dimming, I
input current, 2A/div, DC
, 2A/div, DC
IN
= 3.3V, V
Shutdown Waveform
EE
= -12V, V
LED
LED
= 6A nominal)
= 3V, SS = open
30031568
30031520
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