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MAX8607
1MHz PWM Boost Converter for 1.5A White LED Camera Flash

Highest Current, White LED, Step-Up DC-DC for the Brightest Camera Flash Delivers 1.5A Regulated Current with Up to 84% Efficiency


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Description
FULL DATA SHEET (PDF, 588kB)
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The MAX8607 white LED boost converter is optimized for camera flash/strobe applications using high-current white LEDs. The MAX8607 integrates a 1MHz PWM boost converter, 1.5A low-dropout (LDO) current regulator, and logic control circuitry for a space-saving LED flash design. Two logic inputs control four modes of operation: shutdown mode reduces the quiescent current to 0.1µA (typ), movie mode supplies up to 360mA of LED current for continuous lighting, flash mode supplies up to 1.5A of LED current for short-duration lighting during an exposure, and disco mode supplies +5V (at up to 1A) to external circuits while driving the LED with a fixed 80mA current.

The internal 1MHz boost converter features an adaptive control scheme with an internal switching MOSFET and synchronous rectifier to improve efficiency and minimize external component count. The MAX8607 is available in a 14-pin, 3mm x 3mm TDFN package (0.8mm max height).

Key Features   Applications/Uses
  • Supports Lumileds and Other High-Power White LEDs
  • Independently Set Flash/Movie Currents
    • Flash-Mode Current Up to 1.5A
    • Movie-Mode Current Up to 360mA
  • Disco Mode with Fixed 5V (Up to 1A) and 80mA LED Current
  • 84% Efficiency (PLED / PBATT) at 1.1A
  • TA Derating Function for LED Thermal Protection
  • Output Overvoltage Protection (OVP)
  • Soft-Start Eliminates Inrush Current
  • 1MHz PWM Operation at All Loads
  • Small External Components
  • 2.7V to 5.5V Input Voltage Range
  • 0.1µA Shutdown Mode
  • 14-Pin, 3mm x 3mm TDFN Package

 
  • Camera Flashes/Strobes
  • Cell Phones/Smartphones
  • PDAs and Digital Cameras

    Key Specifications:   White LED Drivers
    Part Number Topology Max. No. of LEDs Configuration Dimming Control POUT (W) IMAX per LED (mA) Min. VIN (V) Max. VIN (V) ICC (max) (mA) Max. VOUT (V) Operating Freq. (kHz) Package Smallest Available Package (max w/pins) (mm2) Price**
    MAX8607  Inductor Based
    Linear Current Regulator
    1 Parallel Digital 6 1500 2.7 5.5 4 5.5 1000 TDFN-EP/14 10 $1.90 @ 1k
    See All White LED Drivers (46)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    Diagram
    MAX8607: Typical Operating Circuit
    Typical Operating Circuit

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    Document Ref.: 19-3783; Rev 1; 2007-03-29
    This page last modified: 2007-03-29


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