MAX1583

White LED Camera-Flash Boost Converter

First 24V, White-LED, Flash/Strobe Supply for Camera Phones

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Overview

Supports Up to Five LEDs for Strobe or Flash
Four Operational Modes
- Strobe: Up to 300mA
- Precharge: With POK Indicator
- Movie: Up to 100mA
- Shutdown: 0.01µA (typ) Quiescent Current
Input Current Limiting
- 1A (MAX1583X)
- 500mA (MAX1583Y)
- 250mA (MAX1583Z)
Small External Components
2.6V to 5.5V Input Range
24V Output Overvoltage Protection
80% Efficient (P_LED / P_IN) Movie Mode
Thermal-Shutdown Protection
10-Pin 3mm x 3mm TDFN Package

The MAX1583 white LED boost converter drives up to five white LEDs with a constant current to provide camera flash/strobe in cell phones, PDAs, DSCs, and other hand-held devices. The MAX1583 includes a 24V boost converter and a high-voltage LDO current regulator for high efficiency and long battery life. Two logic inputs control four modes of operation: shutdown mode (0.5µA max), movie mode for high-efficiency continuous lighting (programmable up to 100mA), precharge mode for charging a reservoir capacitor to 24V while the LEDs are off (POK output indicates a full reservoir capacitor), and strobe mode for firing the flash during an exposure with a regulated current programmable up to 300mA.

The MAX1583X, MAX1583Y, and MAX1583Z offer high, medium, and low current limits, respectively, to allow tradeoff between reservoir capacitor size and peak input current.

The MAX1583 is available in a 10-pin 3mm x 3mm TDFN package (0.8mm max height).

Applications

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

Documentation

Data Sheet 1

MAX1583: White LED Camera-Flash Boost Converter Data Sheet (Rev.1) 09/26/2005

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Charge Pumps 1
MAX1595	PRODUCTION	Regulated 3.3V/5.0V Step-Up/Step-Down Charge Pump
LED Drivers 12
MAX1570	PRODUCTION	White LED Current Regulator with 1x/1.5x High-Efficiency Charge Pump
MAX1910	PRODUCTION	1.5x/2x High-Efficiency White LED Charge Pumps
MAX1912		1.5x/2x High-Efficiency White LED Charge Pumps

MAX1573	PRODUCTION	White LED 1x/1.5x Charge Pump in UCSP and Thin QFN
MAX1574	PRODUCTION	180mA, 1x/2x, White LED Charge Pump in 3mm x 3mm TDFN
MAX1582		High-Efficiency Step-Up Converters for White LED Main and Subdisplay Backlighting
MAX1848	PRODUCTION	White LED Step-Up Converter in SOT23
MAX1561	PRODUCTION	High-Efficiency, 26V Step-Up Converters for Two to Six White LEDs
MAX1599	PRODUCTION	High-Efficiency, 26V Step-Up Converters for Two to Six White LEDs
MAX1553	PRODUCTION	High-Efficiency, 40V Step-Up Converters for 2 to 10 White LEDs
MAX1554	PRODUCTION	High-Efficiency, 40V Step-Up Converters for 2 to 10 White LEDs
MAX1698	PRODUCTION	High-Efficiency Step-Up Current Regulator for LEDs

Evaluation Kits

Evaluation Kit for the MAX1583

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Features and Benefits

Supports Up to 5 LEDs for Strobe/Flash
Four Operational Modes
- Strobe: Up to 300mA (Preset to 100mA)
- Precharge: With POK Indicator
- Movie: Up to 100mA (Preset to 20mA)
- Shutdown: 0.01µA (typ) Quiescent Current
Input Current Limiting
- 1A (MAX1583X)
- 500mA (MAX1583Y)
- 250mA (MAX1583Z)
24V Output Overvoltage Protection
80% Efficient (P_LED/P_IN) Movie Mode
Thermal-Shutdown Protection
10-Lead 3mm x 3mm TDFN Package
Surface-Mount Components
Fully Assembled and Tested

Product Details

The MAX1583 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board for evaluating the MAX1583 white LED flash boost converter. The EV kit accepts a 2.6V to 5.5V input voltage and drives up to five series white LEDs with a constant current to provide camera flash/strobe in cell phones, PDAs, DSCs, and other hand-held devices. The device's switching frequency is 1MHz, allowing tiny external components. Two logic inputs control four modes of operation: shutdown mode (0.5µA max), movie mode for high-efficiency continuous lighting (programmable up to 100mA), precharge mode for charging a reservoir capacitor to 24V while the LEDs are off (POK output indicates a full reservoir capacitor), and strobe mode for firing the flash during an exposure with a regulated current programmable up to 300mA (100mA with installed components). A pushbutton pulse generator is installed to simulate a 30ms flash pulse.

The EV kit comes with the MAX1583X (1A current limit) installed, but the entire MAX1583 family can be evaluated with minor component changes.