MI 8A/ A3s/ A3/ A5 Light IC Original Mobile Phone IC

Superior Quality Mobile Phone IC

The MI 8A/ A3s/ A3/ A5 Light IC Original Mobile Phone IC is designed to provide consistent and reliable performance for your mobile device. Built with precision and tested for authenticity, this IC ensures your phone’s optimal functionality. MI 8A/ A3s/ A3/ A5 Light IC Original Mobile Phone IC

Ensures Device Longevity

This original mobile phone IC not only restores but also ensures your device retains its longevity. Perfectly suited for MI 8A, A3s, A3, and A5 models, it seamlessly integrates with the hardware, delivering consistent results. MI 8A/ A3s/ A3/ A5 Light IC Original Mobile Phone IC

Genuine and Dependable

Our Light IC is 100% original and tailored to meet your mobile phone’s requirements. Say goodbye to glitches and power issues, as this IC offers dependable performance every single time. MI 8A/ A3s/ A3/ A5 Light IC Original Mobile Phone IC

In the world of mobile repair, the “Light IC” (Backlight Driver IC) is a critical component responsible for converting low battery voltage into the high voltage (typically 15V to 35V) required to illuminate the LED backlight of the LCD screen. MI 8A/ A3s/ A3/ A5 Light IC Original Mobile Phone IC

For models like the Xiaomi Mi 8A, Mi A3, and Oppo A3s/A5/A7, several specific ICs are commonly used. The most frequent “Original” component identified for these specific models is the LK marked IC (often a variant of the TPS or LM series) or the PMI632 which handles both power management and light functions in newer Xiaomi devices. MI 8A/ A3s/ A3/ A5 Light IC Original Mobile Phone IC

Full Specifications: Mi 8A / A3s / A3 / A5 Light IC

The following table summarizes the technical parameters for the LK / 12-Pin Series and the PMI632 power management chips commonly found in these devices. MI 8A/ A3s/ A3/ A5 Light IC Original Mobile Phone IC

Specification	LK / 12-Pin Backlight IC (Commonly used in A3s/A5)	PMI632-902 (Power/Light IC for Mi 8A/Redmi 8)
Component Type	Asynchronous Boost Converter (LED Driver)	Power Management IC (PMIC) with Integrated Backlight
Part Marking	LK (12-Pin)	PMI632 902-00
Pin Count	12-Pin BGA / WLCSP	80-Pin BGA (Approx)
Input Voltage Range	$2.7V$ to $5.5V$	$3.7V$ to $4.4V$ (Standard Li-ion)
Output Voltage	Up to $35V$ (Boost)	Variable (Supports LCD Bias + Backlight)
Current Output	$20mA$ to $30mA$ per string	Regulated based on display requirement
Switching Frequency	$1.0MHz$ to $1.2MHz$	Internal Oscillator
Function	Backlight illumination & Dimming control	Power, Charging, and Backlight Driver
Thermal Protection	Integrated Thermal Shutdown at 150°C	Integrated Over-temperature Protection
Package Size	Approx $2mm \times 2.5mm$	Large BGA Chip

Compatibility Overview

These ICs are often interchangeable across specific brands due to standardized PCB designs for budget and mid-range smartphones.

LK (12-Pin) Compatibility:
- Oppo: A3s (CPH1803), A3 (CPH1837), A5 (CPH1809), A7.
- Realme: Realme 2, Realme C1.
- Xiaomi: Note 8, Note 9 (certain variants).
PMI632-902 Compatibility:
- Xiaomi: Mi 8A, Redmi 8, Redmi 8A, Redmi Note 8, Redmi 7.
- Samsung: Galaxy A11, A01 (some regions).

Critical Components in the Light Section

When replacing a Light IC, it is rarely just the chip that fails. For a successful repair on these models, you must also check the Backlight Circuitry Trio:

The Boost Coil: A large square component (usually $2.2\mu H$ or $4.7\mu H$ ) that stores energy to boost voltage. If it is burnt or “leaking,” the new IC will fail immediately.
The Schottky Diode: Only allows current to flow in one direction toward the LCD. If shorted, the phone will have “no light.”
Filter Capacitors: High-voltage capacitors (typically $50V$ rated) that smooth the output. A shorted cap here is the #1 cause of “Black Screen” issues.

Repair Guidelines & Safety

Heat Setting: When removing these original ICs, use a hot air rework station set between 330°C and 350°C with a low air-flow setting to avoid “popcorning” the PCB or blowing away nearby SMD components. MI 8A/ A3s/ A3/ A5 Light IC Original Mobile Phone IC
Alignment: Look for the Direction Dot (Pin 1 marker) on the corner of the IC. Installing it backwards will cause a permanent short-circuit. MI 8A/ A3s/ A3/ A5 Light IC Original Mobile Phone IC
Diagnosis Tip: Before replacing the IC, measure the voltage at the LCD Connector (V-LED+). If you see battery voltage ( $3.7V$ to $4.2V$ ) but no boost ( $15V+$ ), the IC or Coil is likely faulty.