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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

Product Details

Key Features

Parametric specs for LED Drivers
VIN (V) (min) 2.7
VIN (V) (max) 5.5
Max. No. of LEDs 1
# LED Channels 1
Regulation Topology Inductor Based
Linear
Battery Input 1-Cell Li+
LED Configuration Parallel
ILED per Channel (A) (max) 1.5
Dimming Control Digital
POUT (W) 6
ICC (mA) (max) 4
LED String Volt. (V) (max) 5.5
Switching Frequency (kHz) 1000
Package/Pins TDFN/14
Budgetary
Price (See Notes)
2.5
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Simplified Block Diagram

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Parameters

Parametric specs for LED Drivers
VIN (V) (min) 2.7
VIN (V) (max) 5.5
Max. No. of LEDs 1
# LED Channels 1
Regulation Topology Inductor Based
Linear
Battery Input 1-Cell Li+
LED Configuration Parallel
ILED per Channel (A) (max) 1.5
Dimming Control Digital
POUT (W) 6
ICC (mA) (max) 4
LED String Volt. (V) (max) 5.5
Switching Frequency (kHz) 1000
Package/Pins TDFN/14
Budgetary
Price (See Notes)
2.5

Key Features

  • 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

Applications/Uses

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

Description

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).

Simplified Block Diagram

MAX8607: Typical Operating Circuit MAX8607: Typical Operating 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 .