MAX17035, MAX17435, MAX17535 高

MAX17035, MAX17435, MAX17535 高频、低成本SMBus电池充电器

概述

The MAX17035/MAX17435/MAX17535 integrated multichemistry battery chargers IC simplify construction of accurate and efficient chargers. The MAX17035/MAX17435/MAX17535 provide SMBus™-programmable charge current, charge voltage, input current limit, relearn voltage, and digital readback of the IINP voltage. The MAX17035/ MAX17435/MAX17535 utilize a charge pump to control the adapter selection n-channel MOSFETs when the adapter is present. When the adapter is absent, the charge pump is shut down and a p-channel MOSFET selects the battery.

The MAX17035/MAX17435/MAX17535 provide up to 7A of charge current to 2, 3, or 4 lithium-ion (Li+) cells in series. The charge current, and input current-limit sense amplifiers have low offset errors and can use 10mΩ sense resistors. The MAX17035/MAX17435/MAX17535 fixed-inductor ripple architecture significantly reduces component size and circuit cost.

The MAX17035/MAX17435/MAX17535 provide a digital output that indicates the presence of the adapter, an analog output that indicates the adapter or battery current, depending upon the presence or absence of the adapter, and a digital output that indicates when the adapter current exceeds a user-defined threshold.

The MAX17035 operates with a switching frequency of 1.2MHz. The MAX17435 switches at 850kHz, and the MAX17535 switches at 500kHz.

The MAX17035/MAX17435/MAX17535 are available in a small, 4mm x 4mm x 0.75mm 24-pin, lead-free QFN package. An evaluation kit is available.

关键特性

Low-Cost SMBus Charger

High Switching Frequency (1.2MHz, 0.85MHz, 0.5MHz)

Internal Boost Switches

SMBus-Programmable Charge Voltage, Input Current Limit, Charge Current, Relearn Voltage, and Digital IINP Readback

Single-Point Compensation

Automatic Selection of System Power Source

• Adapter n-channel MOSFETs Driven by an Internal Dedicated Charge Pump
• Adapter Soft-Start

±0.4% Accurate Charge Voltage

±2.5% Accurate Input Current Limiting

±3% Accurate Charge Current

Monitor Outputs for

• AC Adapter Current (±2% Accuracy)
• Battery Discharge Current (±2% Accuracy)
• AC Adapter Presence

AC Adapter Overvoltage Protection

11-Bit Battery Voltage Setting

6-Bit, Charge-Current Setting/Input Current Setting

Improved IINP Accuracy at Low Input Current

应用/使用

 2至4节Li+电池供电设备
 笔记本电脑
 PDA与移动通信
 
Standard Application Circuit

高频低成本电池充电器integratedSMBus

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