5662 ORIGINAL Mobile Phone IC
Upgrade Your Mobile Repair Efficiency
The 5662 ORIGINAL Mobile Phone IC is a premium component designed to bring your mobile devices back to life. Engineered for seamless performance, this IC ensures smooth functioning and top-tier quality, making it an ideal choice for repair specialists and DIY enthusiasts alike. 5662 ORIGINAL Mobile Phone IC
Exceptional Compatibility and Performance
Whether you’re dealing with damaged circuits or aiming to replace faulty parts, the 5662 ORIGINAL Mobile Phone IC offers reliable compatibility with various mobile phone models. Its durable design and precision make it a trusted solution for all your repair needs. 5662 ORIGINAL Mobile Phone IC
Why Choose the 5662 ORIGINAL IC?
Choose the 5662 ORIGINAL IC for consistent results and hassle-free installations. Designed to meet industry standards, this component brings unmatched reliability, efficiency, and longevity to every repair project. 5662 ORIGINAL Mobile Phone IC
In the world of mobile and tablet repair, the designation “5662” most commonly refers to the Backlight Driver IC, a critical component found in several high-end devices like the iPad Pro 10.5″, iPad 6 (2018), and certain iPhone models (XR/XS Max). 5662 ORIGINAL Mobile Phone IC
While multiple ICs share the “5662” part number (such as the TI DAC5662 or ON Semi NCP5662), the specific “original” component used in mobile logic boards for display illumination is a specialized high-efficiency boost converter. 5662 ORIGINAL Mobile Phone IC
Technical Overview: The 5662 Backlight IC
The 5662 IC is responsible for “boosting” the low battery voltage (typically $3.7\text{V} – 4.2\text{V}$) to the high voltage (up to $37\text{V}$) required to power the LED backlight string behind the LCD. It uses Pulse Width Modulation (PWM) to control brightness levels smoothly.
Full Specifications Table
| Parameter | Specification Details |
| Component Type | Step-Up (Boost) LED Driver IC |
| Primary Function | Mobile/Tablet Backlight Power Management |
| Input Voltage ($V_{IN}$) | $2.7\text{V}$ to $5.5\text{V}$ (Standard Lithium Battery Range) |
| Output Voltage ($V_{OUT}$) | Up to $37\text{V}$ (Supports up to 10 serial LEDs) |
| Switching Frequency | $1.1\text{MHz}$ (High frequency for compact inductor use) |
| Switch Current Limit | $1.3\text{A}$ (Typical) |
| Dimming Method | PWM to Constant Current (Frequency: $200\text{Hz}$ – $200\text{kHz}$) |
| Efficiency | Up to $86\%$ |
| Feedback Voltage ($V_{FB}$) | $300\text{mV}$ (Low reference for reduced power loss) |
| Shutdown Current | $< 1\mu\text{A}$ |
| Operating Temperature | $-40\text{°C}$ to $+85\text{°C}$ |
| Package Type | BGA (Ball Grid Array) or SOT23-6 / DFN (36-pin variants) |
| Common Marking | 5662, 5662 BQW |
Pin Configuration & Functionality
In the mobile repair context (specifically for Apple devices), this IC is often a 36-pin or similar high-density package. Key pins include:
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VIN: Direct connection to the battery or main power rail (VCC_MAIN).
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LX (Switch): Connected to the backlight inductor; this is where the “boost” occurs.
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FB (Feedback): Monitors the current through the LEDs to maintain constant brightness.
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EN/PWM: Receives the signal from the CPU to turn the light on/off or adjust brightness.
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OVP (Over Voltage Protection): Prevents the IC from burning out if the LED string is disconnected (e.g., a damaged screen flex).
Common Failures and Diagnostics
If you are searching for this IC, you are likely dealing with a “No Backlight” issue. Common symptoms of a failed 5662 IC include:
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“Image but no light”: You can see the Apple logo with a flashlight, but the screen is dark.
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Short Circuit: The device may not turn on at all if the IC has shorted $V_{IN}$ to ground.
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Flickering: Unstable PWM control due to thermal damage or liquid corrosion.
Comparison with other “5662” ICs
It is important not to confuse the mobile backlight IC with these industrial components:
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DAC5662 (Texas Instruments): A dual 12-bit Digital-to-Analog Converter (used in base stations, not phones).
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NCP5662 (ON Semi): A $2.0\text{A}$ Low Dropout (LDO) linear regulator (used for voltage stabilization).
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2SC5662 (Rohm): A high-frequency NPN transistor.
Summary for Repair Technicians
The 5662 is a high-precision component. When replacing it, ensure you use high-quality leaded solder paste and a professional hot air station, as the proximity to the CPU and RAM on most iPad/iPhone boards makes it a “high-risk” repair.
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