A8481

更新时间： 2024-01-05 11:13:55

品牌	Logo	应用领域
急速微 - ALLEGRO		稳压器电感器
页数	文件大小	规格书
12页	784K
描述
Dual Output Boost Regulator Using Single Inductor

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技术参数
数据手册

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A8481 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
零件包装代码：	SON	包装说明：	3 X 3 MM, 0.75 MM HEIGHT, LEAD FREE, MO-229WEED, DFN-10
针数：	10	Reach Compliance Code：	unknown
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.84	Is Samacsys：	N
模拟集成电路 - 其他类型：	DUAL SWITCHING CONTROLLER	控制模式：	CURRENT-MODE
控制技术：	PULSE WIDTH MODULATION	最大输入电压：	9 V
最小输入电压：	2.7 V	标称输入电压：	3 V
JESD-30 代码：	S-PDSO-N10	JESD-609代码：	e3
长度：	3 mm	湿度敏感等级：	1
功能数量：	1	端子数量：	10
最高工作温度：	85 °C	最低工作温度：	-40 °C
最大输出电流：	1.5 A	封装主体材料：	PLASTIC/EPOXY
封装代码：	HVSON	封装等效代码：	SOLCC10,.12,20
封装形状：	SQUARE	封装形式：	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
认证状态：	Not Qualified	座面最大高度：	0.75 mm
子类别：	Switching Regulator or Controllers	表面贴装：	YES
切换器配置：	BOOST	最大切换频率：	1400 kHz
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	NO LEAD	端子节距：	0.5 mm
端子位置：	DUAL	宽度：	3 mm
Base Number Matches：	1

A8481 数据手册

A8481

Dual Output Boost Regulator Using Single Inductor

Features and Benefits

Description

▪ Two independently controlled channels for dual display

▪ Output voltage up to 23 V

The A8481 is a step-up dc-to-dc converter in a thermally-

enhanced MLP package. A constant 1.2 MHz switching

frequency, with current-mode control scheme, provides stable

low-noise operation at high load conditions.

▪ 2.7 to 9 V input

▪ Output disconnect allows less than 1 μA supply current

during shutdown

▪ Single-pin dimming control for WLED

▪ 1.2 MHz switching frequency

▪ 1.5 A switch current limit

TheA8481isadualoutputOLED+WLEDdriver.Thisdevice

is suitable for driving OLED bias supply as well as WLEDs

for backlight. For OLED it is capable of delivering 80 mA at

18 V, and can drive five WLEDs at 20 mA.

▪ OVP, Pulse-by-Pulse OCP, OTP, and Soft Start

Independent output control and output disconnect make this

IC ideally suited for battery operated, dual display portable

applications. The IC disconnects input from the output path

during shutdown, allowing shutdown currents less than 1 μA.

TheA8481 is available in a 10-pin 3 mm × 3 mm MLPpackage

that has a nominal height of only 0.75 mm.

Package: 10 pin MLP/DFN (suffix EJ) with

exposed thermal pad

Applications include:

▪ Dual-panel cellular phone with OLED and

WLED backlight

▪ Personal Digital Assistant (PDA)

▪ Camcorder, personal stereo, MP3 player, camera

Approximate Scale 1:1

Typical Applications

Additional applications on page 11

OUT

COUT

GND

FB1

COUT

GND

FB1

CIN

CAP

A8481

SUPPLY

VIN

OUT1

VIN

OUT1

OUT2

ISET

OUT2

ISET

ON2

ON1

ON2

ON1

PWM

RSET

Figure 1a. Typical application circuit for A8481

driving OLED and three WLEDs

Figure 1b. OUT2 current dimming with PWM on

ISET pin, with parallel resistor

8481-DS, Rev. 2

12 3 4 5 6 7...12

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