MAX1535C
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MAX1535C

Highly Integrated Level 2 SMBus Battery Chargers

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Part Details
Features
  • Compliant with Level 2 Smart-Battery-Charger Specifications Rev 1.1
  • Intel SMBus 2-Wire Serial Interface
  • ±0.5% Charge-Voltage Accuracy
  • 11-Bit Charge-Voltage Resolution
  • ±3% Input Current-Limit Accuracy
  • Use Small (10mΩ) Current-Sense Resistors
  • 8A Maximum Charge Current
  • 6-Bit Input and Charge-Current Resolution
  • 8V to 28V Input Voltage Range
  • 175s Charge Safety Timer
  • Automatic Selection of System Power Source
  • Charge Any Battery Chemistry (Li+, NiCd, NiMH, Lead Acid, etc.)
Additional Details
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The MAX1535B/MAX1535C/MAX1535D are highly integrated, multichemistry battery chargers that simplify construction of advanced smart chargers with a minimum number of external components. They use Intel's system management bus (SMBus™) to control the charge voltage, charge current, and the maximum current drawn from the AC adapter. High efficiency is achieved through use of a constant off-time step-down topology with synchronous rectification.

In addition to support of the Smart-Battery-Charger Specifications Rev 1.1, the MAX1535B/MAX1535C/MAX1535D include additional features. The maximum current drawn from the AC adapter is programmable to avoid overloads when supplying the load and the battery charger simultaneously. This enables the user to reduce the cost of the AC adapter. The MAX1535B/MAX1535C/MAX1535D provide a digital output that indicates the presence of an AC adapter. Based on the presence or absence of the AC adapter, the MAX1535B/MAX1535C/MAX1535D automatically select the appropriate source for supplying power to the system by controlling two external p-channel MOSFETs. Under system control, the MAX1535B/MAX1535C/MAX1535D allow the battery to undergo a relearning or conditioning cycle in which the battery is completely discharged through the system load and then recharged.

The MAX1535B/MAX1535C/MAX1535D are capable of charging 2, 3, or 4 lithium-ion (Li+) cells in series, providing charge currents as high as 8A. The DC-DC converter in the MAX1535B/MAX1535C/MAX1535D uses a high-side p-channel switch with an n-channel synchronous rectifier. The charge current and input current-limit sense amplifiers have low input-offset errors and can use small-value sense resistors (0.01Ω, typ).

The MAX1535B/MAX1535C/MAX1535D are available in a 5mm x 5mm, 32-pin, thin QFN package and operate over the extended -40°C to +85°C temperature range. An evaluation kit is available to reduce design time.

Applications

  • Notebook and Subnotebook Computers
  • Portable Equipment with Rechargeable Batteries
  • Tablet PCs

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX1535BEVKIT

Evaluation Kit/Evaluation System for the MAX1535B

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MAX1535BEVKIT

Evaluation Kit/Evaluation System for the MAX1535B

Evaluation Kit/Evaluation System for the MAX1535B

Features and Benefits

  • 0.5% Battery Voltage Accuracy
  • 3% Battery Charge-Current Accuracy
  • Input Current-Limiting Set Point through SMBus Command
  • Up to 8A Battery Charge Current
  • Automatic Selection of System Power Source
  • +8V to +25V Input Voltage Range
  • Charges Li+, NiCd, NiMH Battery Chemistries
  • SMBus-Compatible 2-Wire Serial Interface
  • Includes Windows 95-/98-/2000-/XP-Compatible Software and Demo PC Board
  • Fully Assembled and Tested
  • Product Detail

    The MAX1535B evaluation kit (EV kit) is an efficient, multichemistry battery charger. It uses the Intel® System Management Bus (SMBus™) to control the battery regulation voltage, charger current output, and input current-limit set point.

    The MAX1535B EV kit can charge one, two, three, or four series Li+ cells with a current up to 8A.

    The MAX1535B evaluation system (EV system) consists of a MAX1535B EV kit and the Maxim SMBUSMON board. The MAX1535B EV kit includes Windows® 95-/98-/2000-/XP-compatible software to provide a user-friendly interface.

    Applications

    • Notebook and Subnotebook Computers
    • Portable Equipment with Rechargeable Batteries
    • Tablet PCs

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