MAX8930EWJ+T【PDF 1/52 页】IC LED DRVR WT/RGB BCKLGT 49WLP

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MAX8930

WLED Charge Pump, RGB, OLED Boost,

LDOs with ALC and CAI

General Description

The MAX8930 integrates a charge pump for white LED

display backlighting with ambient light control (ALC)

feature. The high-efficiency, adaptive-mode 1x/-0.5x

charge pump drives up to 11 LEDs (8 WLEDs + RGB

LED) with constant current for uniform brightness. The

LED current is adjustable from 0.1mA to 25.6mA in 256

linear steps through I 2 C. High accuracy and LED-to-LED

current matching are maintained throughout the adjust-

ment range. The MAX8930 includes soft-start, thermal

Features

S White LED Charge Pump

S Adaptive 1x or -0.5x Negative Modes

S 11 Low-Dropout LED Current Sinks with 25.6mA

to 0.1mA in 256 Dimming Steps

S Ramp-Up/Down Control for Main White LED

S Ramp-Up/Down Control for RGB LED

S Individual Brightness Control for Each White,

RGB LED

shutdown, open-circuit, and short-circuit protection.

Three 200mA LDOs are provided with programmable

output voltages to provide power to external circuitry.

These three LDOs can also be configured for a GPO

function through the I 2 C. A step-up converter is also

available on the MAX8930 for biasing a PMOLED sub-

panel.

The MAX8930 is available in the 49-bump, 3.17mm x

3.17mm WLP package.

Simplified Application Circuit

I NPU T

Low 240μA (typ) Quiescent Current

Ambient Light Control (ALC) for Any Type of Light

Sensor

Content Adaptive Interface

I 2 C-Compatible Control Interface

Three Programmable LDOs Up to 200mA

Step-Up DC-DC Converter with Programmable

Output for PMOLED Application

Low 0.1μA Shutdown Current

2.7V to 5.5V Supply Voltage Range

Thermal Shutdown

Open and Short-Circuit Protection

INPUT 2.7V TO 5.5V

INPUT 1.7V TO 5.5V

PV1

PV2

PV3

PV5

PV4

BIAS

WLED1

WLED2

WLED3

WLED4

WLED5

WLED6

Applications

Cell Phones and Smartphones

PDAs, Digital Cameras, Camcorders, and Other

Portable Equipment

MAX8930EWJ+

-40 N C to +85 N C

I NPU T

LIGHT

SENSOR

SENSE

KEY

MAX8930

WLED7

WLED8

RLED

GLED

BLED

CHG

Ordering Information

PART TEMP RANGE PIN-PACKAGE

49 WLP

0.4mm pitch

+ Denotes a lead(Pb)-free/RoHS-compliant package.

SCL

SDA

LDO1

LDO2

2.3V TO 3.1V, 200mA

μP

CAI

LDO3

OUT

1.2V, 1.5V, 1.8V, 2.5V, 200mA

13V TO 16.5V

Typical Operating Circuit appears at end of data sheet.

PLAYR

PLAYG

PLAYB

REFBP

V DD

FILT

For pricing, delivery, and ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

19-4921; Rev 0; 3/10

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