Datasheet > EV0042

EV0042

更新时间： 2024-01-21 17:36:17

品牌	Logo	应用领域
芯源 - MPS		驱动器泵
页数	文件大小	规格书
3页	181K
描述
1x, 1.5x, 2x High Efficiency Charge Pump 4 White LED Driver Evaluation Board

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EV0042 数据手册

EV0042

1x, 1.5x, 2x High Efficiency Charge Pump

4 White LED Driver Evaluation Board

The Future of Analog IC Technology

GENERAL DESCRIPTION

FEATURES

The EV0042 is an evaluation board for the

MP1519, a fully automatic driver for powering

four white LEDs, with up to 4V forward voltage,

from a single Li-Ion or three NiMH cells. The

driver performs all of the sensing and control to

run the LEDs at an optimum charge pump ratio

for efficiency without an expensive inductor.

The driver allows PWM operation to support

brightness control.

•

2% LED Current Matching

High Efficiency (>93%)

Current Source Outputs

No Ballast Resistors Required

1x, 1.5x and 2x Automatic Modes

Constant Frequency Operation

Automatic LED Detection

High and Low Frequency PWM Capability

2.5V to 5.5V Operation

Less than 1µA Leakage during Shutdown

Detects Changes in Battery Level

No External Schottky Diode Required

Soft-Start and Soft Switching Operation

The tiny 3mm x 3mm QFN16 package and

small external capacitors allow for the most

compact white LED solution available.

ELECTRICAL SPECIFICATIONS

APPLICATIONS

Parameter

Symbol

Value

Units

# of WLEDs

Input Voltage

LED Current

•

Cell Phones

PDA or Hand Held Computers

White LED Application at 3.6V Supply

V_IN

2.5 – 5.5

I_LED

“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic

Power Systems, Inc.

EV0042 EVALUATION BOARD

Efficiency vs

Supply Voltage

= 3.35V @ 20mA

LED

100

=5mA

LED

=20mA

LED

=10mA

LED

2.5

3.0

3.5

4.0

4.5

(L x W x H) 2.4” x 1.9” x 0.4”

(6.1cm x 4.8cm x 1.0cm)

SUPPLY VOLTAGE (V)

MP1519-EC01

Board Number

MPS IC Number

MP1519DQ

EV0042

EV0042 Rev. 1.5

10/27/2005

www.MonolithicPower.com

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

12 3

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