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4.5V to 60V, Synchronous Step-Down Li-Ion Battery Charger Controller

Wide Input Voltage, High-Efficiency, Switching Super Cap Battery Charger

Product Details

Key Features

Parametric specs for Battery Chargers
Charging VIN (V) (max) 60
Max. ICHG (A) 1-20
Cell Chemistry Li-Ion
Li-Polymer
LiFePO4
# Lithium Ion Cells 12
Protected VIN (V) (max) 60
Charger (V) 1.25 to 56
Oper. Temp. (°C) -40 to +125
Package/Pins TQFN-CU/24
Budgetary
Price (See Notes)
2.81
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Simplified Block Diagram

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Parameters

Parametric specs for Battery Chargers
Charging VIN (V) (max) 60
Max. ICHG (A) 1-20
Cell Chemistry Li-Ion
Li-Polymer
LiFePO4
# Lithium Ion Cells 12
Protected VIN (V) (max) 60
Charger (V) 1.25 to 56
Oper. Temp. (°C) -40 to +125
Package/Pins TQFN-CU/24
Budgetary
Price (See Notes)
2.81

Key Features

  • Optimized Feature-Set for Li-Ion Batteries Including Li-Polymer, LiFePO4 and Li-Titanate
    • ±4% Charging Current Regulation Accuracy
    • ±6% Charging Current Monitor Accuracy (ISMON) ,
    • ±1% Voltage Regulation Accuracy
    • Programmable Constant Current (CC) Mode Charging Current (ILIM)
    • Charge Termination on Full Battery Detection with Taper Current Threshold and Taper Timer
    • Wide 4.5V to 60V Input-Voltage Range
    • Adjustable Output-Voltage Range from 1.25V up to (VDCIN - 2.1V)
    • 125kHz to 2.2MHz Adjustable Frequency with External Clock Synchronization (RT/SYNC)
  • Reliable Operation in Adverse Environmental Conditions
    • Input Short-Circuit Protection (GATEN)
    • Safety Timer Feature (TMR)
    • Deeply Discharged Battery Detection and Preconditioning (DDTH)
    • Battery Temperature Sensing and Charge when Within Temperature of Range (TEMP)
    • Cycle-by-Cycle Overcurrent Limit
    • Programmable EN/UVLO Threshold
    • Status Output Monitoring Using Open-Drain Outputs (FLG1 and FLG2)
    • Overtemperature Protection
    • Complies with CISPR 32 (EN55032) Class B Conducted and Radiated Emissions
    • Wide -40°C to +125°C Ambient Operating Temperature Range/ -40°C to +150°C Junction Temperature Range

Applications/Uses

  • Battery Backup for Lighting, Security Cameras, and Control Panels
  • Building and Home-Automation Backup Power
  • Industrial Battery Charging and Energy Storage
  • Portable Industrial and Medical Equipment
  • Power Tools and Handheld Terminals

Description

The Himalaya series of voltage regulator ICs, power modules, and chargers enable cooler, smaller, and simpler power supply solutions. The MAX17703 is a high-efficiency, high-voltage, synchronous, step-down, Himalaya Li-ion battery-charger controller designed to operate over an input-voltage range of a 4.5V to 60V. The MAX17703 operates over a wide -40°C to +125°C temperature range and offers a complete charging solution for Li-ion batteries with a ±4% accurate constant current. The output voltage is programmable from 1.25V up to (VDCIN - 2.1V) with ±1% regulation accuracy.

The device uses an external nMOSFET to provide input supply-side short-circuit protection, preventing battery discharge.

The device charges the battery in constant current (CC) and constant voltage (CV) states and terminates in a top-up-charge state after the taper timer is elapsed. The device resumes charging automatically when the battery voltage falls below the recharge voltage threshold. Detection and preconditioning of deeply discharged batteries are enabled by a deep discharge detection comparator.

The MAX17703 is available in a 24-pin 4mm x 4mm TQFN package with an exposed pad.

Simplified Block Diagram

MAX17703: Simplified Application Circuit MAX17703: Simplified Application Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.