MAX1582ETC Maxim Integrated Products, MAX1582ETC Datasheet

MAX1582ETC

Manufacturer Part Number

MAX1582ETC

Description

LED Drivers High Efficiency 26V Step-Up Converter fo

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX1582ETCT.pdf (10 pages)

Specifications of MAX1582ETC

Number Of Segments

Operating Supply Voltage

2.6 V to 5.5 V

Maximum Power Dissipation

1349 mW

Maximum Operating Temperature

+ 85 C

Mounting Style

SMD/SMT

Package / Case

TQFN EP

Minimum Operating Temperature

- 40 C

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MAX1582ETC+T

Manufacturer:

SIRENZA

Quantity:

1 632

Current page: 1 of 10
Download datasheet (243Kb)

The MAX1582/MAX1582Y drive up to six white LEDs in

series with a constant current to provide display back-

lighting for two (main and sub-) displays in cell phones

and other handheld devices. This configuration elimi-

nates the need for ballast resistors and expensive fac-

tory calibration. The proprietary dual-output, step-up

pulse-width modulation (PWM) converter includes a low

maximum battery life.

The MAX1582/MAX1582Y utilize 1MHz current-mode

PWM control to allow small input and output capacitors

and a small inductor, while minimizing ripple on the input

supply and avoiding interference to sensitive circuitry in

the equipment. Integrated overvoltage protection (27V

for the MAX1582 and 18V for the MAX1582Y) eliminates

the need for an external zener diode to protect the IC

from open circuit. Flexible dimming control utilizes either

an analog control signal or direct digital PWM control

without external RC filtering. This also increases dimming

accuracy at low brightness levels. The PWM dimming

signal can be any frequency from 200Hz to 200kHz. Soft-

start eliminates inrush current during startup.

The MAX1582/MAX1582Y are available in tiny 4

chip-scale (UCSP™) and 12-pin thin QFN packages.

19-2783; Rev 2; 8/05

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.

DSON

DIRECT PWM

2.2μF

ANALOG OR

0.022μF

DIMMING

2.6V TO 5.5V

for White LED Main and Subdisplay Backlighting

INPUT

Cell Phones with One or Two Displays

Smart Phones, Palmtops, and Wireless

Handhelds

Other Handheld Devices with Dual Displays

n-channel MOSFET switch for high efficiency and

Typical Application Circuit

V+

CTRL

EN1

EN2

COMP

MAX1582

________________________________________________________________ Maxim Integrated Products

22μH

GND

PGND

General Description

OUT1

OUT2

0.1μF

High-Efficiency Step-Up Converters

Applications

2 TO 4 LEDS

2 TO 3 LEDS

7.5Ω

MAIN

SUB-

DISPLAY

♦ Accurate Current Regulation for Uniform

♦ Lights Up Two LED Sections for Main and

♦ Up to 84% Efficiency

♦ Internal High-Power, 30V MOSFET

♦ Low 15mV

♦ Flexible Dimming Control

♦ Overvoltage Protection to Eliminate Zener Diode

♦ Constant 1MHz PWM Operation

♦ Low-Profile Inductor and Capacitors

♦ Soft-Start Eliminates Inrush Current

♦ 2.6V to 5.5V Input

♦ 0.01µA (typ) Shutdown Current

♦ Tiny UCSP (2.1mm

*EP = Exposed paddle.

+Denotes lead-free package.

UCSP is a trademark of Maxim Integrated Products, Inc.

Ordering Information continued at end of data sheet.

M A X1 5 8 2 E BE - T

M AX 1582E BE + T -40°C to +85°C 16 UCSP-16

MAX1582ETC

MAX1582ETC+

Pin Configurations continued at end of data sheet.

Illumination

Subdisplays

QFN (4mm

Analog DAC Controlled

Direct-Digital PWM (No RC Required)

from 200Hz to 200kHz

PART

TOP VIEW

P-P

CTRL

4mm) Packages

V+

-40°C to +85°C 16 UCSP-16

-40°C to +85°C 12 Thin QFN-EP*

Input Ripple

TEMP RANGE PIN-PACKAGE

Ordering Information

4mm x 4mm

MAX1582Y

THIN QFN

2.1mm

MAX1582

Pin Configurations

0.61mm) and Thin

OUT2

EN2

Features

1582EBE

MARK

AACE

TOP

Related parts for MAX1582ETC

MAX1582ETC Summary of contents

Page 1

... Shutdown Current ♦ Tiny UCSP (2.1mm QFN (4mm ✕ 4 PART Applications 1582E -40°C to +85°C 16 UCSP-16 MAX1582ETC MAX1582ETC+ *EP = Exposed paddle. +Denotes lead-free package. UCSP is a trademark of Maxim Integrated Products, Inc. Ordering Information continued at end of data sheet. TOP VIEW MAIN LEDS DISPLAY SUB- ...

Page 2

High-Efficiency Step-Up Converters for White LED Main and Subdisplay Backlighting ABSOLUTE MAXIMUM RATINGS V+, VP, CTRL to GND............................................-0.3V to +6.0V PGND to GND .......................................................-0.3V to +0.3V LX, OUT1 to GND ...................................................-0.3V to +30V OUT2 to GND .........................................................-0.3V to +14V COMP, ...

Page 3

White LED Main and Subdisplay Backlighting ELECTRICAL CHARACTERISTICS (continued +3.0V 20V 22µ OUT1 0°C to +85°C, unless otherwise noted. Typical values are at T PARAMETER N-CHANNEL SWITCH LX On-Resistance LX Leakage ...

Page 4

High-Efficiency Step-Up Converters for White LED Main and Subdisplay Backlighting ELECTRICAL CHARACTERISTICS (continued +3.0V +20V 22µ OUT1 -40°C to +85°C, unless otherwise noted.) (Notes 1, 3) PARAMETER Maximum Duty Cycle CTRL = ...

Page 5

White LED Main and Subdisplay Backlighting (See the Typical Applications Circuit 1.5V, 4 LEDs +25°C, unless otherwise noted.) CTRL A SWITCHING WAVEFORMS 500ns/div PIN NAME QFN UCSP Input Voltage Supply. Input voltage range is ...

Page 6

High-Efficiency Step-Up Converters for White LED Main and Subdisplay Backlighting f OSC 1.0MHz 114kΩ 336kΩ DAC OR CTRL PWM 1.25V CLAMP EN1 ENABLE INPUTS EN2 MAX1582 Figure 1. Functional Diagram Detailed Description The MAX1582’s high efficiency and small size make ...

Page 7

White LED Main and Subdisplay Backlighting path between the input and the LEDs through the inductor and Schottky diode. To ensure the LEDs remain off when the MAX1582/MAX1582Y are in shut- down, the minimum input forward voltage of the ...

Page 8

... -40°C to +85°C 16 UCSP- 1582Y -40°C to +85°C 16 UCSP-16 MAX1582YETC -40°C to +85°C 12 Thin QFN-EP* MAX1582YETC+ -40°C to +85°C 12 Thin QFN-EP* *EP = Exposed paddle. +Denotes lead-free package. UCSP is a trademark of Maxim Integrated Products, Inc. 8 _______________________________________________________________________________________ Pin Configurations (continued) TOP VIEW (BALLS SOLDERED DOWN) 1 ...

Page 9

White LED Main and Subdisplay Backlighting (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) _______________________________________________________________________________________ High-Efficiency Step-Up Converters Package Information PACKAGE OUTLINE, 12, 16, ...

Page 10

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2005 Maxim Integrated Products Package Information (continued) Printed USA is a registered trademark of Maxim Integrated Products, Inc ...

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