Datasheet > APW7001QAI-TRG

APW7001QAI-TRG

更新时间： 2024-10-02 12:54:27

品牌	Logo	应用领域
茂达 - ANPEC		驱动器显示器泵
页数	文件大小	规格书
19页	311K
描述
1X/1.5X/2X Charge Pump White LED Driver for Main and Sub-Displays

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中文翻译

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APW7001QAI-TRG 数据手册

APW7001

1X/1.5X/2X Charge Pump White LED Driver for Main and Sub-Displays

Features

General Description

The APW7001 is a high efficiency charge pump white

LED driver; the device drives up to four white LEDs in the

main display and up to two white LEDs in the sub-display

with regulated constant current for uniform intensity. The

supply voltage ranges from 2.7V to 5.5V and it is opti-

mized for a Li-ion battery application. The APW7001 op-

erates in 1x, 1.5x, and 2x charge pump modes and auto-

matically switches the charge pump modes depend on

the input voltage to maintain the required power for high

power efficiency. The APW7001 provides up to 30mA per

LED and allows several methods such as the PWM sig-

nals on the ENM pin for main-display dimming and on

the ENS pin for sub-display dimming. The two control

logic pins, ENM and ENS, allow disabling or enabling the

main and sub-displays. The supply current is only 2mA in

2x mode, and the ENM and ENS are kept low for 20ms

will allow the device to enter shutdown mode with 2mA

quiescent current. The APW7001 features current limit

and short circuit protection. The APW7001 switches at

1MHz frequency and only requires four 1mF ceramic ca-

pacitors and one resistor, and ensures low input current

ripple and EMI. The APW7001 is available in a 16-pin

QFN package.

±1.5% LED Current Matching

Powers Main and Sub-Display LEDs

High Efficiency Up to 90% Over Li-ion Battery

Discharge

Output Current Up to 30mA per LED

2.7V to 5.5V Operating Voltage

1x/1.5x/2x Charge Pump Modes

Low Shutdown Current: 2mA Maximum

Low Input Ripple and EMI

Internal Soft-Start Limits Inrush Current

Short Circuit Current Limit

Thermal Shutdown Protection

Output Over-Voltage Protection

16-pin QFN Package

Lead Free and Green Devices Available

(RoHS Compliant)

Applications

Pin Configuration

Cellular Phone White LED Back Light

Portable Device

PDA, Handheld Computer

DSC

16 15 14 13

ILED 5

GND

Metal

GND Pad

(Bottem)

11 C1-

ILED 6

ENM

C1+

C2-

ENS

APW7001

QFN4x4-16 Top View

ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise

customers to obtain the latest version of relevant information to verify before placing orders.

www.anpec.com.tw

Rev. A.4 - Oct., 2009

12 3 4 5 6 7...19

中文翻译

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