LM 36274 ORIGINAL Mobile Phone IC

Exceptional Performance for Your Mobile Devices

The LM 36274 ORIGINAL Mobile Phone IC is engineered for seamless and reliable operation in your mobile devices. It ensures optimal performance, making it an essential component for improved functionality and durability. LM 36274 ORIGINAL Mobile Phone IC

Top-Quality Original IC

Precision-manufactured, this original mobile phone IC represents cutting-edge technology and unwavering quality standards. It is designed for compatibility with a wide range of mobile models, offering enhanced efficiency and dependable performance.

Durability You Can Trust

Built with longevity in mind, the LM 36274 Mobile Phone IC provides excellent resistance to wear and tear, ensuring your mobile device continues to perform at its best over time. Experience the difference of a genuine mobile phone IC that combines quality with superior engineering.

The LM36274 is a highly integrated power management solution primarily used as a Backlight Driver and LCD Bias Supply in modern smartphones. It is a critical component for ensuring high-quality display performance, managing the power for the screen’s LEDs (backlight) and providing the specific voltages required for the LCD panel itself. LM 36274 ORIGINAL Mobile Phone IC

Below are the detailed specifications and technical parameters for the original LM36274 IC.

📱 LM36274 Core Technical Specifications

Feature	Specification
Manufacturer	Texas Instruments (TI)
Function	4-Channel WLED Driver + Integrated LCD Bias
Input Voltage Range ( $V_{IN}$ )	2.7V to 5.0V
Backlight Output Voltage ( $V_{OUT}$ )	Up to 29V (Max)
LCD Bias Outputs	Dual Output ( $\pm 4V$ to $\pm 6.5V$ )
Maximum Bias Current	Up to 80 mA per output
Efficiency	Up to 92% (Peak)
Package Type	DSBGA-24 (Ball Grid Array)
Package Size	Approx. 2.44 mm × 1.67 mm
Interface / Control	$I^2C$ and PWM (Pulse Width Modulation)

🛠️ Detailed Functional Breakdown

1. Backlight Driver (WLED)

The LM36274 is designed to drive up to four parallel LED strings. This is essential for large, high-resolution smartphone screens that require uniform lighting.

Dimming Control: 11-bit exponential and linear dimming. LM 36274 ORIGINAL Mobile Phone IC
Current Precision: 0.2% matched LED current between strings (prevents uneven brightness). LM 36274 ORIGINAL Mobile Phone IC
Switching Frequency: Up to 1050 kHz (High frequency allows for smaller external inductors). LM 36274 ORIGINAL Mobile Phone IC

2. LCD Bias Power

Modern LCDs require both positive and negative voltages to operate the liquid crystals.

Positive Bias: Generated via an LDO (Low Dropout Regulator).
Negative Bias: Generated via an Inverting Charge Pump.
Resolution: Output is programmable in 50-mV steps, allowing fine-tuning for specific display panels.

3. Application & Compatibility

This IC is widely found in the motherboards of several popular smartphone brands. It is often the primary suspect when a phone has a “black light” (display works but is too dark to see) or “no graphics” issue.

Common Compatible Models:

Samsung: Galaxy A12, A21s, M40, A02, A217. LM 36274 ORIGINAL Mobile Phone IC
Huawei/Honor: Nova 2, Nova 4, Honor 10 Lite, Honor 20i. LM 36274 ORIGINAL Mobile Phone IC
Xiaomi: Redmi Note 8, Redmi Note 8 Pro. LM 36274 ORIGINAL Mobile Phone IC

📋 Maximum Ratings & Electrical Characteristics

Parameter	Minimum	Maximum	Unit
Operating Temperature	-40	+85	°C
Storage Temperature	-65	+150	°C
LED Current per Channel	60	30,000	µA
Inductor Range	4.7	15	µH
Switch Current Limit	—	2.5	A

💡 Maintenance & Repair Tips

If you are replacing this IC during a mobile repair, keep the following in mind:

Soldering: Since it is a BGA (24-pin) chip, you must use a precision hot air station. Recommended temperature for removal is usually around 330°C to 350°C depending on your equipment.
Orientation: Look for the small dot (Pin 1 indicator) on the IC and the motherboard to ensure correct placement.
Symptom Checklist: If the screen flickers or the backlight is completely dead but the phone still vibrates/makes sounds, the LM36274 or its surrounding coils and diodes are likely at fault.

LM 36274 ORIGINAL Mobile Phone IC