MAX8685

Xenon Photoflash Charger with IGBT Driver and Voltage Monitor

Fastest Charge-Time Photoflash Capacitor Charger with Voltage Monitor

Data Sheet (Rev. 4)
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Part Details

  • 2s to Charge 100µF to 300V
  • Integrated IGBT Driver
  • Voltage-Monitor Output*
  • Short-/Open-Circuit Protection
  • Controlled Inrush Current
  • Programmable Input Current Limit Up to 2A (MAX8685A) or 2.6A (MAX8685F)*
  • Programmable Input Voltage-Overload Protection*
  • Extended Battery Life with Input-Voltage Monitoring*
  • Internal 2.6A Switch
  • Robust Architecture Allows Use of Low-Cost Transformers
  • High Accuracy Not Dependent on Transformer Turns Ratio
  • Automatic Refresh Mode Draws Minimal Quiescent Current
  • Charge-Done Indicator
  • 3mm x 3mm, 14-Pin TDFN Package (MAX8685A/MAX8685F)
  • 2mm x 3mm, 8-Pin TDFN Package (MAX8685C/MAX8685D)
MAX8685
Xenon Photoflash Charger with IGBT Driver and Voltage Monitor
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Documentation

Data Sheet 1

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Hardware Ecosystem

Parts Product Life Cycle Description
LCD/CCD/OLED Bias 1
MAX8614
PRODUCTION Dual-Output (+ and -) DC-DC Converters for CCD
Product 2
MAX8622
Fast-Charge-Time Xenon Flash Charger for Digital Still Cameras and Camera Phones
MAX1567
Obsolete Six-Channel, High-Efficiency, Digital Camera Power Supplies
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Evaluation Kits

MAX8685CEVKIT

Evaluation Kit for the MAX8685C

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Features and Benefits

  • Charges 35µF to 300V
  • EV Kit Includes Xenon Flash Tube, IGBT, and Trigger Transformer
  • No Inrush Current
  • Short-Circuit Protection
  • Robust Architecture Allows Use of Low-Cost Transformers
  • High Accuracy Not Dependent on Transformer Turns Ratio
  • Automatic Refresh Mode Draws Minimal Quiescent Current
  • Charge-Done Indicator
  • Fully Assembled and Tested

Product Details

The MAX8685C evaluation kit (EV kit) is a fully assembled and tested printed-circuit board (PCB) for evaluating the MAX8685C/MAX8685D xenon flash charger family. The MAX8685C EV kit operates from a 2.5V to 5.5V supply and charges a 35µF capacitor to 300V. Battery voltages as low as 1.5V can be used to supply the inductor primary current. The MAX8685C/MAX8685D offer fixed peak primary current limits of 1A and 1.6A, respectively. An LED indicator on the EV kit lights up when the initial charging cycle is complete.

Applications

  • Cell-Phone Cameras
  • Digital Cameras
  • Film Cameras
  • Personal Media Players

MAX8685AEVKIT

Evaluation Kit for the MAX8685A

Buy Now View Details

Features and Benefits

  • Charges 35µF to 300V
  • EV Kit Includes Xenon Flash Tube, IGBT, and Trigger Transformer
  • Voltage-Monitor Output
  • No Inrush Current
  • Short-Circuit Protection
  • Programmable Input Current Limit Up to 2A
  • Programmable Input Voltage-Overload Protection
  • Robust Architecture Allows Use of Low-Cost Transformers
  • High Accuracy Not Dependent on Transformer Turns Ratio
  • Automatic Refresh Mode Draws Minimal Quiescent Current
  • Charge-Done Indicator
  • Fully Assembled and Tested

Product Details

The MAX8685A evaluation kit (EV kit) is a fully assembled and tested printed-circuit board (PCB) for evaluating the MAX8685A xenon flash charger. The MAX8685A EV kit operates from a 2.5V to 5.5V supply and charges a 35µF capacitor to 300V. Battery voltages as a low as 1.5V can be used to supply the inductor primary current. The MAX8685A features an undervoltage input monitor (UVI). UVI monitors the battery voltage and suspends switching if the input voltage drops below a programmed threshold. The MAX8685A also features a voltage-monitor output that provides a scaled replica of the output voltage. The current limit on the MAX8685A EV kit is set to 2A (2.6A for the MAX8685F), and is easily adjusted by adding a resistor. An LED indicator on the EV kit lights up when the initial charging cycle is complete.

Applications

  • Cell-Phone Cameras
  • Digital Cameras
  • Film Cameras
  • Personal Media Players
MAX8685CEVKIT
Evaluation Kit for the MAX8685C
MAX8685AEVKIT
Evaluation Kit for the MAX8685A

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