MAX8934A

PRODUCTION

Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring

Safely Charges a Li+ Cell Following JEITA-Recommended Safe Charging Methods

Data Sheet (Rev. 3) Product Selection Table
Part Models
2
1ku List Price
Starting From $2.86
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Part Details

  • Li+ Charger with Smart Power Selector, No External MOSFETs Needed
  • Monitors Battery Temperature and Adjusts Charge Current and Termination Voltage Automatically per JEITA Recommendations
  • Active-Low OT Flags System of a Hot Battery During Discharge
  • Ultra-Low IQ, Always-On 3.3V LDO
  • Common or Separate USB and Adapter Inputs
  • Automatic Adapter/USB/Battery Switchover
  • Load Peaks in Excess of Adapter Rating are Supported by Battery
  • Input OVP to 16V (DC) and 9V (USB)
  • 40mΩ SYS-to-BATT Switch
  • Thermal Regulation Prevents Overheating
  • 4.35V or 5.3V SYS Regulation Voltage
  • 1.5A (max) USB Input Current Limit (MAX8934D)
MAX8934A
Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring
MAX8934A-MAX8934E Block Diagram MAX8934A–MAX8934E Typical Operating Circuit MAX8934A–MAX8934E Pin Configuration
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Documentation

Data Sheet 1

Reliability Data 1

Technical Articles 2

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Hardware Ecosystem

Parts Product Life Cycle Description
Linear Battery Chargers 4
MAX8601
PRODUCTION Single-/Dual-Input 1-Cell Li+ Chargers with OVP Protection and Programmable Charge Timer
MAX8677A
PRODUCTION 1.5A Dual-Input, USB/AC Adapter Charger and Smart Power Selector
MAX8677C
PRODUCTION 1.5A Dual-Input USB/AC Adapter Charger and Smart Power Selector
MAX8934G
PRODUCTION Dual-Input Linear Charger, Smart Power Selector with Advanced Battery Temperature Monitoring
Product 1
MAX8903
2A 1-Cell Li+ DC-DC Charger for USB and Adapter Power
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Evaluation Kits

MAX8934AEVKIT

Evaluation Kit for the MAX8934A, MAX8934B, MAX8934C, MAX8934D, and MAX8934E

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Features and Benefits

  • Battery Temperature Monitor Adjusts Charge Current and Termination Voltage Automatically
    • Potentiometer Adjustment Available
    • 0603 Thermistor Footprint Available
    • Advanced Thermistor Configuration Available (R21, R22)
    • Thermistor Enable Input (THMEN)
  • Adjustable Input-Current Limit and Fast-Charge Current Limit
    • Fast-Charge Current Limit: 750mA and 1.5A (JU5)
    • USB Input-Current Limit: 475mA and 95mA (PEN1, PEN2)
    • DC Input-Current Limit Up to 2A (R2)
  • Status LED Indicators: Active-Low DOK, Active-Low UOK, Active-Low CHG, Active-Low DONE, Active-Low FLT, and Active-Low OT
  • USB Suspend Logic Input
  • 3.3V Always-On LDO
  • Fully Assembled and Tested

Product Details

The MAX8934A evaluation kit (EV kit) is a fully assembled and tested circuit for evaluating the MAX8934A dual-input linear charger and Smart Power Selector™ with advanced temperature monitoring.

The EV kit charges a single-cell lithium-ion (Li+) battery from either a DC input (AC adapter) or a USB 100mA/500mA source, and provides system power from the DC input, USB input, or battery. The DC input has a resistor-adjustable current limit up to 2A, while the USB input-current limit is logic programmable to 100mA/500mA. USB suspend mode is also supported. The charge current limit is adjustable from 300mA to 1.5A. The system load has priority over the charger, so charge current is reduced as necessary to prevent input overload. Charge current is also thermally regulated. Advanced battery temperature monitoring adjusts charge current and termination voltage automatically.

The EV kit comes standard with the MAX8934A installed, but can also be used to evaluate the MAX8934B, MAX8934C, MAX8934D, and MAX8934E by replacing the MAX8934A (U1) with the MAX8934_. Request a free sample of the MAX8934_ when ordering the EV kit.

Applications

  • Digital Still Cameras and Digital Video Cameras
  • Handheld Game Systems
  • PDAs, Palmtop, and Wireless Handhelds
  • Portable Media, MP3 Players, and PNDs
MAX8934AEVKIT
Evaluation Kit for the MAX8934A, MAX8934B, MAX8934C, MAX8934D, and MAX8934E

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