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MAX8821ETI+

更新时间： 2024-10-02 03:34:55

品牌	Logo	应用领域
美信 - MAXIM		消费电路商用集成电路音频放大器信息通信管理泵
页数	文件大小	规格书
29页	903K
描述
White LED Charge Pump with Mono Class D Audio Amp and Dual LDO

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技术参数
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MAX8821ETI+ 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	End Of Life	零件包装代码：	QFN
包装说明：	HVQCCN,	针数：	20
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.13
商用集成电路类型：	CONSUMER CIRCUIT	JESD-30 代码：	S-XQCC-N28
JESD-609代码：	e3	长度：	4 mm
湿度敏感等级：	1	功能数量：	1
端子数量：	28	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	UNSPECIFIED
封装代码：	HVQCCN	封装形状：	SQUARE
封装形式：	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified	座面最大高度：	0.8 mm
最大供电电压 (Vsup)：	5.5 V	最小供电电压 (Vsup)：	1.5 V
表面贴装：	YES	技术：	BICMOS
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	NO LEAD	端子节距：	0.4 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	4 mm	Base Number Matches：	1

MAX8821ETI+ 数据手册

19-1014; Rev 0; 10/07

White LED Charge Pump with Mono Class D

Audio Amp and Dual LDO

MAX821

General Description

Features

♦ White LED Inverting Charge Pump

Independent Adaptive Current Regulators for

Each LED

The MAX8821 integrates a charge pump for white

LEDs, an audio loudspeaker amplifier, and two low-

noise LDOs controlled by an I²C control interface. The

high-efficiency, adaptive-mode inverting charge pump

drives up to six LEDs with constant current for uniform

brightness. The LED current is controlled by an I²C

interface and adjusts from 0.1mA to 25.6mA per LED

into 32 pseudo-logarithmic steps. Independent volt-

ages for each LED maximize efficiency even with large

6 Low-Dropout Current Regulators

Flexible I²C Dimming Control for Each LED

Ramp-Up/Down, Current Control for Each LED

Low 70µA (typ) Quiescent Current

T Derating Function Protects LEDs

♦ Mono 2W Class D Loudspeaker Amplifier

LED forward voltage (V ) mismatch. An internal temper-

ature derating function reduces the current above

+40°C to protect the LEDs.

85% Efficiency (R = 8Ω, P

= 600mW)

OUT

Low 0.05% THD+N at 1kHz

High 65dB PSRR at 1kHz

Fully Differential Inputs

The high-efficiency mono Class D audio amplifier deliv-

ers up to 2W into a 4Ω speaker from a 5V input supply.

The amplifier features proprietary filterless Active

Emissions Limiting (AEL) technology. AEL prevents

high-frequency emissions resulting from conventional

Class D free-wheeling behavior in the presence of an

inductive load. The amplifier offers two modulation

schemes: a fixed-frequency mode (FFM) and a spread-

spectrum mode (SSM) that reduce EMI-radiated emis-

sions due to the modulation frequency. The amplifier

also has robust output protection and high power-sup-

ply rejection ratio (PSRR). Click-and-pop suppression is

active during power-up/down, enable/disable, and for

all mode changes. The amplifier’s gain is adjustable

through an I²C interface, from -3dB to +24dB in 10 3dB

steps. Differential inputs improve common-mode noise

rejection.

-3dB to +24dB Gain Settings in 3dB Steps

Integrated Click-and-Pop Suppression

Low Quiescent Current

♦ Dual Low-Noise LDO

45µV

Output Noise, 70dB PSRR

RMS

Flexible I²C-Controlled Output Voltages

200mA and 300mA Output Current Drive

Ordering Information

PIN-

PKG

PART

TEMP RANGE

PACKAGE

CODE

28 Thin QFN

4mm x 4mm

MAX8821ETI+ -40°C to +85°C

+Denotes a lead-free package.

T2844-1

The LDOs in the MAX8821 are designed for low-noise

operation. Each LDO output voltage can be individually

programmed by the I²C interface. Both LDO1 and

LDO2 have a high 70dB PSRR rating.

Typical Operating Circuit

INPUT

2.7 TO 5.5V

C1P

C1N

C2P

C2N

IN1

The MAX8821 includes soft-start, thermal shutdown,

open-circuit, and short-circuit protections, and is avail-

able in a compact 28-pin, Thin QFN, 4mm x 4mm pack-

age (0.8mm max height).

NEG

PGND1

IN2

LED1

LED2

LED3

LED4

LED5

LED6

PGND2

IN3

Applications

INDIVIDUAL

0.1mA TO

25.6mA

AGND

REF

MAX8821

Cell Phones and Smartphones

PDAs, Digital Cameras, Camcorders

MP3 Players, GPS Devices

DIMMING

CMREF

LDO1

LDO2

DUAL LOW

NOISE LDO

LOGIC

CONTROL AND I C

SDA

SCL

INTERFACE

SPK+

SPK-

AIN+

AIN-

LOUDSPEAKER/

EARPIECE

DIFFERENTIAL

AUDIO INPUT

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim's website at www.maxim-ic.com.

12 3 4 5 6 7...29

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与MAX8821ETI+相关器件

型号	品牌	获取价格	描述	数据表
MAX8821EVKIT	MAXIM	获取价格	Fully Assembled and Tested
MAX8821EVKIT+	MAXIM	获取价格	Fully Assembled and Tested
MAX8822	MAXIM	获取价格	Ultra-Efficient Negative Charge-Pump LED Driver with Dual LDOs in 3mm x 3mm Thin QFN
MAX8822	ADI	获取价格	超高效负压电荷泵LED驱动器，带有双LDO，3mm x 3mm薄型QFN封装
MAX8822ETE+	MAXIM	获取价格	Ultra-Efficient Negative Charge-Pump LED Driver with Dual LDOs in 3mm x 3mm Thin QFN
MAX882C/D	MAXIM	获取价格	5V/3.3V or Adjustable, Low-Dropout, Low IQ, 200mA Linear Regulators
MAX882CPA	MAXIM	获取价格	5V/3.3V or Adjustable, Low-Dropout, Low IQ, 200mA Linear Regulators
MAX882CSA	MAXIM	获取价格	5V/3.3V or Adjustable, Low-Dropout, Low IQ, 200mA Linear Regulators
MAX882CSA-T	MAXIM	获取价格	Fixed/Adjustable Positive LDO Regulator, 1.25V Min, 11V Max, 0.64V Dropout, PDSO8, 0.150 I
MAX882EPA	MAXIM	获取价格	5V/3.3V or Adjustable, Low-Dropout, Low IQ, 200mA Linear Regulators

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