Mobile Phone IC For AL65 Original
The AL65 (often paired with its full part number AW9962EDNR) is a specialized Backlight LED Driver IC widely used in the display section of modern mobile devices. It primarily serves as a high-efficiency boost converter designed to drive the backlight LEDs of LCD panels in smartphones.
In mobile repair circles, the AL65 is a critical “6-pin” component known for resolving display light failures in popular mid-range models from brands like Oppo, Vivo, Huawei, and Xiaomi.
Technical Specifications: AL65 Light Control IC
| Feature | Specification Detail |
| Model / Part Number | AL65 (AW9962EDNR) |
| Component Type | LED Backlight Driver / Light Control IC |
| Package Type | SOT-23-6 or 6-Pin DFN (Ultra-compact) |
| Input Voltage ($V_{IN}$) | $2.7\text{V to } 5.5\text{V}$ (Typical battery voltage range) |
| Output Voltage ($V_{OUT}$) | Up to $38\text{V}$ (Boosted for LED strings) |
| Max LED Current | $\approx 20\text{mA}$ to $30\text{mA}$ per string |
| Operating Frequency | $1.0\text{MHz}$ to $1.2\text{MHz}$ (High-frequency switching) |
| Dimming Control | PWM (Pulse Width Modulation) / CABC Support |
| Efficiency | Up to $90\%$ |
| Protection Features | OVP (Over-Voltage), OTP (Thermal), SCP (Short Circuit) |
Core Functional Roles
The AL65 acts as the “powerhouse” for the phone’s display illumination. Its primary jobs include:
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Voltage Boosting: Mobile batteries typically provide around $3.7\text{V}$, but the series-connected LEDs behind an LCD screen require significantly higher voltage (often $15\text{V}$ to $25\text{V}$). The AL65 uses an external boost inductor and diode to pump the voltage to the required levels.
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Constant Current Regulation: To prevent screen flickering or LED burnout, the IC ensures a perfectly steady current flows through the LEDs regardless of battery fluctuations.
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Brightness Management: Through the CABC (Content Adaptive Backlight Control) or PWM pin, the IC receives signals from the CPU to dim or brighten the screen based on user settings or ambient light sensors.
Device Compatibility
The AL65 is a “universal” light IC found in a vast array of Android devices:
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Oppo: A5, A71, A11X, A72, A92s, A32, A52, A8.
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Vivo: Y93, Y91, Y11, Y12, Y15, Y17.
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Redmi/Xiaomi: Redmi 10, Note series (select variants).
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Motorola: Moto E7 Plus (frequently cited in repair solutions).
Common Failure Symptoms
Because it handles high voltages ($20\text{V}+$), the AL65 and its surrounding circuit are prone to failure, especially after water damage or a screen replacement.
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Black Screen (No Light): The phone vibrates and rings (indicating it is “alive”), but the screen remains completely dark. If you shine a flashlight at the screen and can see a faint image, the AL65 or its circuit is faulty.
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Flickering Backlight: The screen brightness jumps or “shivers,” often caused by a degrading AL65 or a failing boost capacitor.
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Overheating Near Display Connector: A shorted AL65 will cause a localized hot spot on the motherboard near the display ribbon cable connector.
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Blown Coil/Diode: Often, the AL65 survives, but the high-stress Boost Inductor (coil) or Schottky Diode in its path burns out, breaking the light circuit.
Professional Repair & Handling
The AL65 is a tiny, 6-legged chip that requires precision micro-soldering.
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Diagnostic Tip: Before replacing the IC, measure the voltage on the output capacitor. If it reads the same as the battery voltage (approx. $3.7\text{V}$) while the phone is on, the IC is not “boosting,” confirming it is likely dead.
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Heat Profile: Use a hot air station at $330\degree\text{C}$ to $350\degree\text{C}$. Ensure you protect nearby plastic connectors with Kapton tape.
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Orientation: Look for the Pin 1 dot. Reversing this IC can send high voltage into the CPU’s dimming line, permanently killing the motherboard
