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Name: LM3630ATMX
Brand: Texas Instruments
SKU: LM3630ATMX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

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Texas Instruments LM3630ATMX

Part No.:: LM3630ATMX

Manufacturer:: Texas Instruments

Package:: 12-WFBGA, DSBGA

Datasheet:: LM3630ATMX.pdf

Description:: IC LED DRVR RGLTR PWM 12DSBGA

In Stock:: 3411

Quantity:: Add To Cart

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LM3630ATMX Specifications

Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®
Series:
-
ProductStatus:
Active
Type:
DC DC Regulator
Topology:
Step-Up (Boost)
InternalSwitch(s):
Yes
NumberofOutputs:
2
Voltage-Supply(Min):
2.3V
Voltage-Supply(Max):
5.5V
Voltage-Output:
-
Current-Output/Channel:
28.5mA
Frequency:
-
Dimming:
PWM
Applications:
Backlight
OperatingTemperature:
-40°C ~ 85°C (TA)
MountingType:
Surface Mount

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LM3630ATMX information

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LM3630ATMX Typical application Circuitry

LM3630ATMX

The LM3630ATMX chip is a highly versatile and efficient dual LED driver designed for backlighting applications in mobile phones, tablets, and other portable devices. This chip is particularly noted for its ability to provide precise brightness control, enhancing the user experience in various lighting conditions.

Functionality: The LM3630ATMX excels in driving LEDs with a high degree of efficiency and precision. It supports a wide input voltage range and offers two independently controlled LED output channels, making it ideal for dual display or backlighting applications.

Applications: This chip finds its use in diverse scenarios, including smartphone backlighting, tablet screens, and other portable device displays, where consistent and controlled illumination is paramount.

Parameters: Key features include a wide input voltage range, integrated boost converter for LED supply, independent dimming control for two LED channels, and programmable dimming curves to tailor the lighting effect as per application needs.

Circuit Design for a Smartphone Backlight:

1. Power Supply Connection: Ensure the LM3630ATMX's V_IN pin is connected to a stable power source, typically between 2.7V and 5.5V, to match the device's operational voltage range.

2. Boost Converter Configuration: Connect an inductor between the LX and V_OUT pins and a Schottky diode from V_OUT to V_IN. This setup boosts the input voltage to a higher level, sufficient to drive the LEDs.

3. LED Channels Setup: Attach the anode of the first set of LEDs to the OVP pin and the cathode to LED1 pin; repeat this step for the second set using LED2 pin. This configuration allows for independent control of two LED banks.

4. Brightness Control: To adjust the brightness, utilize the I2C interface connecting SDA and SCL pins to the microcontroller. This enables software-based brightness adjustment, offering smooth dimming transitions.

5. External Components: Incorporate capacitors at the input and output stages for filtering and stability. A capacitor close to the V_IN pin minimizes input noise, while one near the V_OUT pin stabilizes the output voltage.

6. Thermal Management: Given the chip's power dissipation, it's crucial to consider thermal management. Implementing a heat sink or ensuring adequate PCB layout for heat dissipation can prevent overheating.

7. Fault Protection: Integrate a current-limiting resistor at the LED output and a diode across the inductor to protect against reverse current and voltage spikes, ensuring the longevity of the chip and connected LEDs.

8. Programming and Configuration: Utilize the LM3630ATMX's I2C interface for programming the device. This includes setting the LED current, dimming mode, and operating frequency, providing flexibility in tailoring the backlight according to specific application requirements.

Designing with the LM3630ATMX requires attention to detail, especially in power management, thermal considerations, and precise control over the LED driving mechanism. By adhering to the outlined circuit configuration and considering the highlighted design considerations, developers can harness the full potential of this chip in creating efficient and controlled backlighting solutions for portable devices.

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6. What is the process for return or replacement of LM3630ATMX?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the LM3630ATMX we delivered, we will accept the replacement or return of the LM3630ATMX only when all of the below conditions are fulfilled:

(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of LM3630ATMX.

(3)The PartNo is unused and only in the original unpacked packaging.

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(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations