Datasheet > ADD5207ACPZ

ADD5207ACPZ

更新时间： 2024-09-28 12:50:19

品牌	Logo	应用领域
亚德诺 - ADI		驱动器
页数	文件大小	规格书
16页	428K
描述
Four-String, White LED Driver for LCD Backlight Applications

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ADD5207ACPZ 数据手册

Four-String, White LED Driver

for LCD Backlight Applications

Data Sheet

ADD5207

FEATURES

GENERAL DESCRIPTION

White LED driver based on inductive boost converter

Integrated 40 V MOSFET with 1.5 A peak current limit

Input voltage range: 6 V to 21 V

Maximum output adjustable up to 36 V

600 kHz to 1 MHz adjustable operating frequency

Typical 39 V fixed overvoltage protection (OVP)

Built-in soft start for boost converter

Drives up to 4 LED current strings

LED current adjustable up to 25 mA for each channel

Headroom control to maximize efficiency

Fixed LED dimming frequency: 8 kHz

LED open fault protection

Brightness control with PWM input

Dimming controls

4-channel operation: 90 degree phase shift between

channels

3-channel operation: 120 degree phase shift between

channels

General

The ADD5207 is a white LED driver for backlight applications

based on high efficiency, current mode, step-up converter tech-

nology. It is designed with a 0.15 Ω, 1.5 A internal switch and a

pin-adjustable operating frequency between 600 kHz and 1 MHz.

The ADD5207 contains four regulated current sources for

uniform LED brightness. Each current source can drive up to

25 mA and the LED-driving current is pin adjustable by an

external resistor. The ADD5207 drives up to four parallel

strings of multiple series-connected LEDs with a 1.5% current

matching between strings.

The ADD5207 provides phase shift PWM brightness control

methods. LED dimming control is achieved through the PWM

input. The device includes an 8 kHz LED-dimming oscillator

for driving each current source. The ADD5207 operates over an

input voltage range of 6 V to 21 V, but the device can function

with a voltage as low as 5.6 V.

The ADD5207 also has multiple safety protection features to

prevent damage during fault conditions. If any LED is open, the

device automatically disables the faulty current source. The

internal soft start circuit prevents a high inrush current during

startup. Thermal shutdown protection prevents thermal damage.

Thermal shutdown

Undervoltage lockout

14-lead, 4 mm × 3 mm LFCSP

APPLICATIONS

The ADD5207 is available in a low profile, thermally enhanced,

4 mm × 3 mm × 0.75 mm, 14-lead, RoHS-compliant lead frame

chip scale package (LFCSP) and is specified over the industrial

temperature range of −25°C to +85°C.

Notebook PCs, UMPCs, and monitor displays

TYPICAL APPLICATION CIRCUIT

10µH

10µF

OUT

4µF

–

VIN

OVP

0.1µF

IN2

ADD5207

PWM

OFF ON

SHDN

VDD

FB1

FB2

FB3

BYPASS

1µF

FSLCT

100kΩ

FB4

GND

ISET

COMP

6.8kΩ

OPEN

SET

180kΩ

2.2nF

Figure 1.

Rev. A

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rightsof third parties that may result fromits use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks andregisteredtrademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700 www.analog.com

12 3 4 5 6 7...16

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与ADD5207ACPZ相关器件

型号	品牌	获取价格	描述	数据表
ADD5207ACPZ-RL	ADI	获取价格	Four-String, White LED Driver
ADD5211	ADI	获取价格	Four-String, White LED Driver for LCD Backlight Applications
ADD5211ACPZ-R7	ADI	获取价格	Four-String, White LED Driver for LCD Backlight Applications
ADD5211ACPZ-RL	ADI	获取价格	Four-String, White LED Driver for LCD Backlight Applications
ADD-55	MEANWELL	获取价格	55W Dual Output with Battery Charger(USP Function)
ADD-55_10	MEANWELL	获取价格	55W Dual Output with Battery Charger(USP Function)
ADD-55A	MEANWELL	获取价格	55W Dual Output with Battery Charger(USP Function)
ADD-55A	ASTRODYNE	获取价格	55W Single Output with Battery Charger (USP Function)
ADD-55B	ASTRODYNE	获取价格	55W Single Output with Battery Charger (USP Function)
ADD-55B	MEANWELL	获取价格	55W Dual Output with Battery Charger(USP Function)

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