MT6329A IC

Product Details
Product Details:

- Part Number: MT6329A (Related Variant: MT6329BA / MT6329A/B)

- Manufacturer: MediaTek Inc. (MTK)

- Companion SoC Platforms: MediaTek MT6575 (Single-Core Cortex-A9), MT6577 (Dual-Core Cortex-A9), MT6515

- Function: Master Power Management Integrated Circuit (PMIC) with Integrated Charger, Audio Amp & Backlight Driver

- Internal Architecture & Subsystems:

* 5 Step-Down DC-DC Synchronous Buck Converters (VCORE for CPU, VIO, VMEM, VPROC, VRF)

* 21 Low-Dropout Regulators (LDOs dedicated to Storage, Cameras, Baseband, Sensors, SIM)

* Complete Li-ion Battery Charger with pre-charge/trickle current control and up to 10V input overvoltage tolerance

* Integrated White LED (WLED) Boost Driver for LCD Display Backlight (controlled via I2C)

* Dual-Channel Class-AB / Class-D High-Efficiency Audio Power Amplifiers (0.7W into 8Ω stereo speaker output)

* Hardware Power Sequencing Controller, Watchdog Timer, and 32.768 kHz RTC Crystal Driver

- Package Type: TFBGA-155 (155-ball Thin Fine-Pitch Ball Grid Array)

- Stencil Compatibility: Amaoe MT2 (MTK Power Series BGA Stencil for MT6329 / MT6322 / MT6325) (0.12mm)

- Recommended Solder Paste: 183°C Leaded Solder Paste

Usage:

- Central System Power Hub: Transforms battery voltage (3.4V–4.3V) and external USB input into regulated supplies needed for the baseband processor, flash storage, display backlight, and audio.

- Target Devices & Compatible Models:

* Lenovo: Lenovo S890 (MT6329BA), Lenovo A789, Lenovo P700i, Lenovo A660

* Huawei: Huawei Ascend G330 (U8825D), Huawei Ascend G500 (U8836D), Huawei Y300 (MTK variants)

* Micromax / QMobile: Micromax Canvas 2 (A110 MT6577 batch), QMobile Noir A8, QMobile Noir A10

* ZTE / Alcatel: ZTE V970, Alcatel One Touch Idol (MT6577 variants)

- Common Fault Symptoms & Motherboard Diagnostics:

* Completely Dead Phone (0.00A on DC Supply):

- Handset does not respond to power button. Pressing power key registers 0.00A (open PWRKEY line, missing RTC 32.768 kHz clock, or blown master buck coil).

* No Backlight / Black Screen with Working Sound:

- Phone boots up, vibrates, and makes charging/startup sounds, but the LCD backlight does not turn on. Caused by a burnt internal WLED boost circuit inside MT6329A.

* No Charging / Fake Charging:

- Device fails to detect charger or draws less than 0.10A on an ammeter without battery percentage increasing, caused by damaged input charging FETs.

* Hang on Logo / Bootloop:

- Phone freezes at the brand boot logo due to fluctuating core voltage rails (VCORE / VMEM) during initial system loading.

* Audio Loss (Mute Loudspeaker & Mic):

- Total failure of audio playback from speakers or receiver that persists after replacing speakers, caused by a damaged internal Class-D audio amplifier stage.