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LM3433SQ/NOPB

IC LED DRIVER CTRLR DIM 24WQFN

Product Category: LED Drivers & Power Supply
Mfr. Part #
LM3433SQ/NOPB
Manufacturer: Texas Instruments
Package: 24-WFQFN Exposed Pad
Lead Free Status /RoHS Status:
Data Sheet: LM3433SQ/NOPB Datasheet
Inventory: In Stock

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Mfr. Part #: LM3433SQ/NOPB

Specifications
Product Details

Specifications

Manufacturer Texas Instruments

Product Category LED Drivers

Series LM3433

Type DC DC Controller

Packaging Alternate Packaging

Mounting-Style SMD/SMT

Width 4 mm

Package-Case 24-WFQFN Exposed Pad

Frequency 1MHz

Operating-Temperature -40Â°C ~ 125Â°C (TJ)

Mounting-Type Surface Mount

Output-Type Constant Current

Applications Backlight

Supplier-Device-Package 24-WQFN (4x4)

Number-of-Outputs 1 Output

Rated Output Current -

Internal-Switch-s No

Topology Step-Down (Buck)

Supply Voltage 5.8V

Voltage-Supply-Min 3V

Voltage-Output -

Dimming PWM

Maximum Operating Temperature + 125 C

Operating temperature range - 40 C

Operating-Frequency 1 MHz

Input-Voltage 3 V to 5.8 V

Output-Current 6 A

Supply-Current-Max 1 mA

Package-Case LLP EP

High-Level-Output-Current 30 A

Product Details

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 iluminating 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 ilumination, 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 24-pin WQFN package.

Features

â—Operating Input Voltage Range of -9V to -14V w.r.t. LED Anode
â—Control Inputs Referenced to the LED Anode
â—Output Current Greater than 6A
â—Greater than 30kHz PWM Frequency Capable
â—Negative Output Voltage Capability Allows LED Anode to be Tied Directly to Chassis for Maximum Heat Sink Eficacy
â—No Output Capacitor Required
â—Up to 1MHz Switching Frequency
â—Low lg, 1mA Typical
â—Soft Start
â—Adaptive Programmable ON Time Allows for Constant Ripple Current
â—24-pin WQFN Package

Applications

â—LCD Backlighting
â—Projection Systems
â—Solid State Lighting
â—Automotive Lighting

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Mfr. Part #: LM3433SQ/NOPB