硅天下科技-Wearable Charge Management Solution Ext-MAX14676, MAX14676A

MAX14676, MAX14676A

Wearable Charge Management Solution

Extend Battery Life of Wearable Electronics

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说明

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.

负责人：张超

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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).

关键特性

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

应用

健身监测器

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