MAX8630WETD20+T Maxim Integrated Products, MAX8630WETD20+T Datasheet

MAX8630WETD20+T

Manufacturer Part Number

MAX8630WETD20+T

Description

IC LED DRVR WHITE BCKLGT 14-TDFN

Manufacturer

Maxim Integrated Products

Type

Backlight, White LEDr

Datasheet

1.MAX8630XETD20T.pdf (12 pages)

Specifications of MAX8630WETD20+T

Constant Current

Yes

Topology

PWM, Switched Capacitor (Charge Pump)

Number Of Outputs

Internal Driver

Yes

Type - Primary

Backlight

Type - Secondary

White LED

Frequency

1MHz

Voltage - Supply

2.7 V ~ 5.5 V

Voltage - Output

Mounting Type

Surface Mount

Package / Case

14-TDFN Exposed Pad

Operating Temperature

-40°C ~ 85°C

Current - Output / Channel

25mA

Internal Switch(s)

Yes

Efficiency

93%

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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The MAX8630W/MAX8630X charge pumps drive up to 5

white LEDs with regulated constant current up to 125mA

total. By utilizing adaptive 1x/1.5x charge-pump modes

and very low-dropout current regulators, they achieve

high efficiency over the full 1-cell Li+ battery input volt-

age range. The 1MHz fixed-frequency switching allows

for tiny external components, and the regulation scheme

is optimized to ensure low EMI and low input ripple. An

integrated derating function protects the LEDs from

overheating during high ambient temperatures.

The MAX8630W/MAX8630X are factory trimmed for full-

scale LED current options of 15mA, 18mA, 20mA, and

25mA. The MAX8630X uses two enable inputs (ENM for

3 main LEDs and ENS for 2 sub LEDs) for simple on/off

control and single-wire, serial-pulse dimming in 32 linear

steps. The MAX8630W uses a single direct PWM input

(PWM) to control all 5 LEDs with DC current proportional

to the PWM duty cycle. If both ENM and ENS (or PWM)

are kept low for more than 4ms, the MAX8630_ enters

shutdown. The MAX8630W/MAX8630X are available in a

14-pin, 3mm x 3mm TDFN package (0.8mm max height).

19-0825; Rev 0; 5/07

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.

ENABLE MAIN

ON/OFF AND

ENABLE SUB

ON/OFF AND

INPUT

2.7V TO 5.5V

Display Backlight (Up to 5 LEDs)

Main (3 LEDs) + Sub (2 LEDs) Displays

Cell Phones and Smartphones

PDAs, Digital Cameras, and Camcorders

DIMMING

1μF

Typical Operating Circuit

________________________________________________________________ Maxim Integrated Products

GND

ENM

ENS

General Description

C1P

C2P

MAX8630X

1μF

C1N

C2N

5 White LEDs in 3mm x 3mm TDFN

LED1

LED2

LED3

LED4

LED5

OUT

Applications

125mA 1x/1.5x Charge Pumps for

1μF

OUTPUT

MAIN

SUB

♦ 93% Max/85% Avg. Efficiency (P

♦ 1% LED Current Accuracy

♦ 125mA Total Drive Capability

♦ Adaptive 1x/1.5x Mode Switchover

♦ Single-Wire, Serial-Pulse Dimming (MAX8630X)

♦ Direct-PWM Dimming (MAX8630W)

♦ 15, 18, 20, and 25mA Full-Scale Versions

♦ Low 0.1µA Shutdown Current

♦ Soft-Start Eliminates Inrush Current

♦ Output Overvoltage Protection

♦ Thermal-Derating Function Protects LEDs

♦ 14-Pin, 3mm x 3mm TDFN Package

Note:

+85°C operating temperature range.

+Denotes a lead-free package.

T = Tape and reel.

Ordering Information continued at end of data sheet.

Selector Guide appears at end of data sheet.

MAX8630WETD15+T

Li+ Battery Discharge

TOP VIEW

Independent On/Off/Dimming for Main and Sub

Linear—Full, 31/32nd, 30/32nd, … 1/32nd

( ) ARE FOR MAX8630W

All devices are specified to operate over the -40°C to

PART

PIN-

PACKAGE

14 TDFN-14

(3mm x 3mm)

3mm × 3mm

Ordering Information

MAX8630W

MAX8630X

TDFN

Pin Configuration

LED

MARK

ADQ

TOP

Features

BATT

) Over

T1433-2

CODE

PKG

Related parts for MAX8630WETD20+T

MAX8630WETD20+T Summary of contents

Page 1

... ON/OFF AND ENS C2P C2N DIMMING 1μF ________________________________________________________________ Maxim Integrated Products 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. 125mA 1x/1.5x Charge Pumps for ♦ 93% Max/85% Avg. Efficiency (P Li+ Battery Discharge ♦ 1% LED Current Accuracy ♦ ...

Page 2

Charge Pumps for 5 White LEDs in 3mm x 3mm TDFN ABSOLUTE MAXIMUM RATINGS IN, OUT to GND.....................................................-0.3V to +6.0V C1N, C2N, ENM, CPWM, ENS, PWM to GND ............................................-0. LED_ to GND ............................................-0. C1P, ...

Page 3

Charge Pumps for 5 White LEDs ELECTRICAL CHARACTERISTICS (continued 3.6V 0V, EN_ (PWM GND PARAMETER 1x mode, (V Open-Loop OUT Resistance 1.5x mode, (1.5V Maximum OUT Current V IN OUT ...

Page 4

Charge Pumps for 5 White LEDs in 3mm x 3mm TDFN (V = 3.6V, ENM = ENS = IN +25°C, unless otherwise noted INPUT CURRENT vs. INPUT VOLTAGE DRIVING 2 SUB LEDs 160 V ...

Page 5

Charge Pumps for 5 White LEDs (V = 3.6V, ENM = ENS = IN +25°C, unless otherwise noted STARTUP AND SHUTDOWN V AND ENM V ENS V OUT OUT 1ms/div STARTUP ...

Page 6

Charge Pumps for 5 White LEDs in 3mm x 3mm TDFN PIN — 9 — — 8 ...

Page 7

Charge Pumps for 5 White LEDs 1μF C1P C1N 2.7V TO 5.5V IN 1μF GND MAX8630X ENABLE MAIN ENM ON/OFF AND SERIAL DIMMING ENABLE SUB ON/OFF AND ENS SERIAL DIMMING C2P C2N 1μF Figure 1. Typical Applications Circuit ...

Page 8

Charge Pumps for 5 White LEDs in 3mm x 3mm TDFN Detailed Description The MAX8630_ charge pump drives white LEDs (3 main LEDs and 2 sub LEDs) with regulated constant current for uniform intensity. By ...

Page 9

Charge Pumps for 5 White LEDs When both ENM and ENS (or PWM) are held low for 4ms or longer, the MAX8630_ is shut down and put in a low-current mode. OUT is internally pulled to GND with ...

Page 10

... Charge Pumps for 5 White LEDs in 3mm x 3mm TDFN Ordering Information (continued) PIN- PART PACKAGE 14 TDFN-14 MAX8630WETD18+T (3mm x 3mm) 14 TDFN-14 MAX8630WETD20+T (3mm x 3mm) 14 TDFN-14 MAX8630WETD25+T (3mm x 3mm) 14 TDFN-14 MAX8630XETD15+T (3mm x 3mm) 14 TDFN-14 MAX8630XETD18+T (3mm x 3mm) 14 TDFN-14 MAX8630XETD20+T (3mm x 3mm) 14 TDFN-14 ...

Page 11

Charge Pumps for 5 White LEDs (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) ______________________________________________________________________________________ in 3mm x 3mm TDFN Package Information 11 ...

Page 12

... 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. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2007 Maxim Integrated Products Package Information (continued) ...

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