MAX8630X Maxim Integrated Products, MAX8630X Datasheet

MAX8630X

Manufacturer Part Number

MAX8630X

Description

Triple-Channel Video Reconstruction Filter and Buffer

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX8630X.pdf (12 pages)

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Meier Automation Equipment Co., Limited

Part Number:

MAX8630XETD18+T

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Part Number:

MAX8630XETD20

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Part Number:

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Company:

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Part Number:

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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

Independent On/Off/Dimming for Main and Sub

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

TOP VIEW

( ) 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

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