Rainbow Electronics MAX1583 - Manual

General Description
The MAX1583 white LED boost converter drives up to
five white LEDs with a constant current to provide cam-
era 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 light-
ing (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 and Smart Phones
PDAs and Digital Still Cameras
Features
♦ 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
MAX1583
White LED Camera-Flash
Boost Converter
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-3135; Rev 0; 1/04
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
EVALUATION KIT
AVAILABLE
PART TEMP RANGE PIN-PACKAGE
MAX1583XETB -40 °C to +85°C 10 TDFN 3mm x 3mm
MAX1583YETB -40 °C to +85°C 10 TDFN 3mm x 3mm
MAX1583ZETB -40 °C to +85°C 10 TDFN 3mm x 3mm
8
9
10
OUT
LED
LX
3
2
1
MOV
IN
GND
7 EN2 4 STB
6 EN1 5 POK
TDFN
(3mm x 3mm)
MAX1583
TOP VIEW
Pin Configuration
PART CURRENT LIMIT TOP MARK
MAX1583XETB 1A ACJ
MAX1583YETB 500mA ACK
MAX1583ZETB 250mA ACL
Selector Guide
MAX1583
V IN
2.6V TO 5.5V
LED
EN2
EN1
POK
GND
IN
LX
OUT
STB
MOV
I LED UP TO
300mA
EN1
0
0
1
1
SHUTDOWN
EN2
1
0
1
0
PRECHARGE
MOVIE
STROBE
Typical Operating Circuit