MAX14676, MAX14676A

Wearable Charge Management Solution

Extend Battery Life of Wearable Electronics

 

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概述

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說明

The MAX14676/MAX14676A are battery-charge-management solutions ideal for low-power wearable applications. These devices include a linear battery-charger with a Smart Power Selector™, ModelGauge™ fuel gauge, and several power-optimized peripherals. They feature an ultra-low-power buck regulator with a quiescent current of 900nA (typical) and 74% efficiency with 10μA output.

 

The battery charger features Smart Power Selector operation, allowing operation with dead battery. It limits input current based on a register setting. If the charger power source is unable to supply the entire system load, the smart power control circuit will supplement the system load with current from the battery.

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The MAX14676/MAX14676A embed a Maxim proprietary ModelGauge fuel gauge to provide an accurate estimate of the available capacity for rechargeable lithium batteries.

 

The MAX14676/MAX14676A include a synchronous high-efficiency step-down converter. The device features a fixed-frequency PWM mode for tighter regulation, and a burst mode for increased efficiency during light-load operation.

 

The MAX14676/MAX14676A have a boost regulator and three programmable current sinks that can be used to drive a variety of LED configurations. The boost converter is controlled independently from the current sinks, and they can be also used separately.

 

The MAX14676/MAX14676A feature a power switch controller that allows the device to be turned on and off by a pushbutton. This controller also provides a delayed reset signal and voltage sequencing.

 

These devices are available in a 42-bump, 0.5mm pitch, 3.497mm x 3.118mm wafer-level package (WLP).

關(guān)鍵特性

Extend System Use Time Between Battery Charging

1.8V Low-IQ 200mA Buck Regulator

0.9μA (typ) Quiescent Current

Automatic Burst or Forced-PWM Modes

ModelGauge with Accurate State-of-Charge

Easy-to-Implement Li+ Battery Charging

Smart Power Selector

28V Tolerant Input

Thermistor Monitor

Minimize Power-Management Footprint though High Integration

3.2V Low-IQ 100mA LDO

2.0V Always-On 50μA LDO

+5V Safe Output LDO

6.6V Low-IQ 120μA Charge Pump

Support a Wide Variety of Display Options

5V to 17V Output Boost Converter

3-Channel Adjustable High-Voltage Current Sinks

Optimize System Control

Pushbutton to Enable Ultra-Low-Power Mode and Power-On Voltage Sequencing

I2C Control

應(yīng)用

健身監(jiān)測器

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便攜式醫(yī)療設(shè)備

可穿戴電子產(chǎn)品

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