Datasheet > LP7811

LP7811

更新时间： 2024-09-30 17:00:55

品牌	Logo	应用领域
微源半导体 - LOWPOWER		/
页数	文件大小	规格书
27页	1952K
描述
HERO Charge,路径管理,I2C控制；支持MCU双向通讯，耳机电压跟随充电提升耳机仓续航时间

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中文翻译

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LP7811 数据手册

LP7811

30V, BUCK Mode TWS Charging Case Manager

Features

General Description

⚫ Case Charging Management

The LP7811 is an advanced TWS charging case

- Support 4.1V to 6.0 V input voltage with 30V absolute

maximum input voltage rating

management IC targeting to improve the total battery run

time of the TWS earphones. The IC features a switching

charger protects up to 30V input voltage and digitally

programmable up to 1.7-A charge current via an I2C bus.

The smart discharge voltage management feature tries to

maximize the battery run time with ultra-low dropout

charging scheme. The VOL and the VOR outputs track the

battery voltages of the earphones when operating together

with the companion linear charger (LP408X) in the

earphone, minimizing the power loss. An NTC interface is

offered to manage the charge and discharge operation

based on the battery temperature sensed by the NTC

resistor. Additional silicon temperature management

ensure the safe operation. Earphone insertion and removal

detections simplify the design of the earphone detection.

The IC supports two independent bidirectional

communication bus to the left and right earphone. An I2C

bus is offered for programmability and flexibility of the

device.

- Programmable fast charge current up to 1.7A with up

to 95% efficiency and 5% accuracy

- Programmable floating voltage with 0.5% accuracy

- Automatic recharge function

- Programmable trickle charge current

- Programmable termination current

⚫ Smart Earphone Charging Management

- Independent earphone insert detection and charging

path

- Smart earphone ultra-low dropout charging to

maximize battery run time

- Programmable earphone fast charge current up to

300mA each channel

- Programmable End of Charge (EEOC) current

- Bi-directional communication to earphones

⚫ Programmable Always-on Linear Regulator

⚫ Temperature Management

The quiescent current is 5-uA in standby mode.

The whole system is in a small 24-pin 4x4 QFN package.

- JEITA standard NTC management during charging

Order Information

and discharging

LP7811

- Charging current thermal foldback

- Thermal shutdown protection

F: Green/Pb-Free

⚫ I2C interface with interrupt indication

⚫ 5-uA ultra-low quiescent current

⚫ 4mm X 4mm QFN-24 package

Package Type

QV : QFN

⚫ RoHS Compliant and 100% Lead (Pb) free

Typical Application Circuit

Applications

⚫ TWS charging case

⚫ Wireless microphone

⚫ Smart Glasses

Battery

10uF

C₃

2.2uH

L₁

10uF, C₄

Earphone

Pogo Pin

BAT

VIN

21/22

23/24

PMID

Input

1/2/3

VOL

1Ω, R₁

1uF, C₂

2.2uF,C₁

VOR

VCC

0.47uF

C₅

2P7

VCC

LP7811

SDA

SCL

IRQb

LED2

LED1

GPIO0

GPIO1

HALL

GPIO8

GPIO2

GPIO3

GPIO4

NTCS

100kΩ,

R₃

ß=3435

KEY

VCC

COMML

COMMR

NTC

GND

GPIO7

14/17/18

100kΩ

R_NTC

Version: 4/5/2023

www.lowpowersemi.com

email: marketing@lowpowersemi.com

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与LP7811相关器件

型号	品牌	获取价格	描述	数据表
LP7812	LOWPOWER	获取价格	HERO Charge，内置通讯功能、霍尔与按键控制,耳机电压跟随充电快充不发热
LP7812A	LOWPOWER	获取价格	HERO Charge，关断型、霍尔与按键控制,耳机电压跟随充电提升耳机仓续航时间
LP7812B	LOWPOWER	获取价格	HERO Charge，常开型、霍尔与按键控制,耳机电压跟随充电提升耳机仓续航时间
LP7812C	LOWPOWER	获取价格	HERO Charge，支持MCU双向通讯,耳机电压跟随充电提升耳机仓续航时间
LP7815	LOWPOWER	获取价格	HERO Charge，支持MCU单向通讯,耳机电压跟随充电功提升耳机仓续航时间
LP7852	LOWPOWER	获取价格	路径管理充放电,按键控制放电输出，锂电保护
LP7C31BH	INTEL	获取价格	CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
LP7C51BH	INTEL	获取价格	CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
LP8	YUXIANG	获取价格	LP CORES
LP800	PULSE	获取价格	700/800/900/1850 mhz coils/whips

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