Firmenblog über Mingjiada Supply Maxim MAX77650 And MAX77651 Battery Chargers For Small Li+Power Supply

Mingjiada Supply Maxim MAX77650 And MAX77651 Battery Chargers For Small Li+Power Supply

As small lithium-ion battery-powered products—such as TWS earphones, smartwatches, fitness trackers, hearing aids, smart sensors and portable medical devices—continue to evolve towards lighter, thinner designs, longer battery life and lower standby power consumption, the demand for power management solutions featuring high integration, compact size and ultra-low quiescent current is growing.

Shenzhen Mingjiada Electronics Co., Ltd. — a long-standing supplier of [Maxim] MAX77650/MAX77651 ultra-low-power power management ICs (PMICs) — offers a series of devices that integrate a single-cell Li+ battery linear charger, a three-output SIMO buck-boost regulator and GPIO functions, making them suitable for space-constrained, small Li+ battery-powered products. Mingjiada Electronics supplies the MAX77650/MAX77651 and offers stock enquiries, sample procurement and BOM fulfilment services.

Product Overview
The MAX77650/MAX77651 are ultra-low-power PMICs designed for small, single-cell lithium-ion battery applications. Compared to solutions using discrete chargers and multiple DC/DC converters, this series integrates charge management, multiple power outputs and system control functions into a compact package, helping to reduce the number of external components, minimise PCB footprint and lower system standby power consumption.
Their core architecture utilises a SIMO (Single Inductor, Multiple Output) buck-boost regulator, which generates multiple output voltages using a single inductor, thereby reducing the number of inductors required in traditional multi-output power supply solutions. This makes them suitable for wearable and portable devices where size and height are critical considerations. The devices incorporate a linear charger for managing the charging of small Li+ batteries, and allow configuration of charging parameters, output voltages and GPIO functions via an I²C interface. Specific model variations and parameters should be verified against the official Maxim/ADI data sheets.

Key Features
Integrated single-cell Li+ battery linear charger: Suitable for products powered by small-capacity lithium-ion batteries, simplifying charging circuit design;
Three-output SIMO buck-boost regulator: Single-inductor, multi-output architecture reduces the number of inductors, facilitating miniaturisation;
Ultra-low quiescent current: Suitable for wearables, IoT and portable devices requiring long standby times and low-power operation;
I²C programmable configuration: Allows flexible setting of output voltage, charging parameters and system functions;
Integrated GPIO: Facilitates system status control, interrupts and peripheral management;
Small package size and minimal external components: Helps reduce PCB layout space and lower BOM complexity;
Optimised for small Li+ battery products: suitable for applications with stringent requirements regarding size, power consumption and battery life.

Typical Applications
The MAX77650/MAX77651 are suitable for a wide range of small, single-cell lithium-ion battery-powered products, including:
TWS (True Wireless Stereo) earphones and charging cases;
Smartwatches, smart bracelets and fitness trackers;
Wearable products such as hearing aids and ear-worn devices;
IoT sensor nodes and smart tags;
Portable medical devices and health monitoring devices;
Small consumer electronics and space-constrained portable instruments.
For small Li-ion battery systems requiring a ‘charger + multiple low-voltage power supplies + low standby power consumption’, the MAX77650/MAX77651 provide a highly integrated power management solution, reducing the number of discrete components and simplifying system design.

Models supplied by Mingjiada Electronics:
MAX77650AEWV
MAX77650BEWV
MAX77650CEWV
MAX77650MEWV
MAX77651AEWV
MAX77651BEWVA

Mingjiada Electronics is a long-standing supplier of Maxim/ADI power management devices, offering stock enquiries, sample procurement, small-batch orders and bulk supply services for the MAX77650 and MAX77651 battery chargers/PMICs. For further product information on the MAX77650/MAX77651 or to enquire about sample prices, please visit the Mingjiada Electronics website (https://www.integrated-ic.com/) for further supply details.