PAM2805 datasheet(1/9 Pages) PAM

tên linh kiện	PAM2805

Giải thích chi tiết về linh kiện	3-Modes/3W WLED Driver with 1 or 2 Cell Battery

PDF	9 Pages

Scroll/Zoom	100%

nhà sản xuất	PAM [Power Analog Micoelectronics]

Trang chủ	http://www.poweranalog.com

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1 / 9 page

Features

3 Modes Cycling Function:

Bright

Dimming

Blinking

Reset to Bright mode if Power Off time

more than 5S

Adjustable Output Current: up to 750mA

8.5Hz Blinking Mode

Low SW on Resistance: 1 00mΩ

Over Temperature Protection

Over Voltage Protection

SOT23-6 Package

Pb-Free Package

Low Start-Up Voltage: 0.9V(Typ.)

White LED Torch (Flashlight)

The PAM2805 is a step-up DC-DC WLED driver

w i t h

3

m o d e s

c y c l i n g

f u n c t i o n ( 1 0 0 %

brightness,25% brightness and 8.5Hz blinking).

T h e u n i q u e 3 m o d e s c y cl i n g f u n ct i o n ca n

eliminate the needs of extra functional MCU or IC.

The PAM2805 can deliver up to 750mA output

current by setting an external resistor.

The PAM2805 switches at a 1.0MHz constant

frequency, allowing for the use of small value

external inductor and ceramic capacitors.

A low 95mV feedback voltage reduces the power

loss in the Rs for better efficiency. With its internal

2A, 100

device can provide

high efficiency even at heavy load.

The PAM2805 is available in SOT23-6 package.

Applications

General Description

m

Ω NMOS switch, the

n

Typical Application

Block Diagram

1

www.poweranalog.com

11/2011 Rev1.0

PAM2805

3-Modes/3W WLED Driver with 1 or 2 Cell Battery

,

Power Analog Microelectronics Inc

95mV

Reference

+

A1

-

Rc

Cc

-

A2

+

Comparator

VOUT

VIN

SW

PWM

Logic

+

-

PGND

1.0MHz

Oscillator

Dimming

and

Blinking

Logic

FB

Σ

Ramp

Generator

BLK

Power Off

<5S

Power Off

<5S

Power Off

<5S

ILED=95mV/Rs

2.2 H

μ

VIN

VOUT

VIN

SW

PAM2805

VOUT

FB

BLK

GND

L

20uF

10uF

1uF

Rs

Số phần tương tự - PAM2805

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Diodes Incorporated	PAM2805	209Kb / 9P	3-MODES/ 3W WLED DRIVER WITH 1 OR 2 CELL BATTERY Rev 1

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