LM36274 Backlight Driver

LM36274 Lighting Integrated Circuit for Samsung Galaxy A12 and A21s

The LM36274 Backlight Driver is the integrated circuit responsible for controlling and powering the screen backlight LEDs in compatible Samsung mobile phones. This component is essential for resolving lighting faults where the device turns on and displays a visible image against the light, but the display remains completely dark. This is a direct replacement part for micro-soldering interventions on the mainboard.

Technical Specifications

• Component type: Integrated Circuit (IC) Backlight Driver
• Component reference: LM36274
• Internal reference: DI-LM36274
• Model compatibility: Samsung Galaxy A12, Samsung Galaxy A12s, Samsung Galaxy A21s
• Application: Screen backlight control and amplification
• Mounting type: SMD / BGA soldering on the mainboard

What Distinguishes This Model

The LM36274 circuit operates with the specific power lines required by the screens of the Samsung Galaxy A12, A12s and A21s models, ensuring stable voltage and current regulation in the backlight diodes. It is the appropriate option for technical benches carrying out board-level repairs in cases of short circuits or overvoltage on the lighting line.

Usage Tips

Replacing this component requires hot air soldering equipment and a microscope. It is recommended to apply appropriate flux during chip extraction and alignment, as well as to check beforehand that there are no short-circuited coils, switching diodes or capacitors on the backlight output line before soldering the new integrated circuit.

Frequently Asked Questions

In what situations should the LM36274 driver be replaced?

Replacement is indicated when the phone has sound and vibration, but the screen does not turn on the backlight, confirming that the fault is not with the screen itself nor with surrounding fuses and coils.

Is this integrated circuit suitable for the Samsung Galaxy A21s?

Yes, the LM36274 is fully compatible with the Samsung Galaxy A21s, as well as the Samsung Galaxy A12 and Galaxy A12s.