SC820ULTRT

更新时间： 2024-09-27 06:10:19

品牌	Logo	应用领域
商升特 - SEMTECH		电池
页数	文件大小	规格书
22页	362K
描述
Adapter/USB Dual Input Single-cell Li-ion Charger

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中文翻译

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数据手册

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SC820ULTRT 数据手册

SC820

Adapter/USB Dual Input

Single-cell Li-ion Charger

POWER MANAGEMENT

Features

Description

Input voltage protection — 30V

The SC820 is a dual input (adapter/USB) linear single-cell

Li-ion battery charger in an 8 lead 2×2mm MLPD ultra-thin

package. Both inputs will survive sustained input voltage

up to 30V to protect against hot plug overshoot and faulty

charging adapters.

Adapter input automatically selected over USB

Constant voltage — 4.2V, 1% regulation

Charging by current and voltage regulation (CC/CV)

Thermal limiting of charge current

Programmable battery-dependent currents (adapter-

sourced fast-charge & pre-charge, termination)

Programmable source-limited currents (USB-sourced

fast-charge & pre-charge)

Current-limited adapter support — reduces power dis-

sipation in charger IC

USB input limits charge current — prevents Vbus

overload

Instantaneous CC-to-CV transition for faster charging

Three termination options — ﬂoat-charge, automatic

re-charge, or forced re-charge to keep the battery

topped-oﬀ after termination without ﬂoat-charging

Soft-start — reduces load transients

High operating voltage range — permits use of

unregulated adapters

Complies with CCSA YD/T 1591-2006

Charging begins automatically when a valid input source

is applied to either input. The adapter input is selected

when both input sources are present.

Thermal limiting protects the SC820 from excessive power

dissipation when charging from either source. The SC820

can be programmed to turn oﬀ when charging is complete

or to continue operating as an LDO regulator while ﬂoat-

charging the battery.

The adapter input charges with an adapter operating in

voltage regulation or in current limit to obtain the lowest

possible power dissipation by pulling the VAD input

voltage down to the battery voltage. The VUSB input

dynamically limits load current to automatically prevent

over-loading the USB Vbus supply.

Space saving 2×2×0.6 (mm) MLPD package

Pb free, Halogen free, and RoHS/WEEE compliant

Charge current programming requires two resistors. One

determines battery-capacity dependent currents: adapter

input fast-charge current, pre-charge current, and charge

termination current. The other independently determines

input-limited USB charging currents: USB input fast-

charge and pre-charge current.

Applications

Mobile phones

MP3 players

GPS handheld receivers

Typical Application Circuit

SC820

Battery

Pack

Device

Load

V_ADAPTER

VAD

ENB

BAT

USB Vbus

VUSB

STATB

GND

2.2 μF

IPRGM

IPUSB

2.2 μF

September 17, 2009

12 3 4 5 6 7...22

中文翻译

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与SC820ULTRT相关器件

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SC824	SEMTECH	获取价格	Single-cell Li-Ion Charger Tri-Mode with Timer and NTC
SC824EVB	SEMTECH	获取价格	Single-cell Li-Ion Charger Tri-Mode with Timer and NTC
SC824ULTRT	SEMTECH	获取价格	Single-cell Li-Ion Charger Tri-Mode with Timer and NTC
SC825035KE9	VISHAY	获取价格	CAPACITOR, TANTALUM, SOLID, POLARIZED, 35 V, 8.2 uF, THROUGH HOLE MOUNT, AXIAL LEADED
SC826010JE9	VISHAY	获取价格	CAPACITOR, TANTALUM, SOLID, POLARIZED, 10 V, 82 uF, THROUGH HOLE MOUNT, AXIAL LEADED
SC826010KE9	VISHAY	获取价格	CAPACITOR, TANTALUM, SOLID, POLARIZED, 10 V, 82 uF, THROUGH HOLE MOUNT, AXIAL LEADED
SC8261G	SILAN	获取价格	LI+ BATTERY PROTECTION CIRCUIT
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SC828A	ETC	获取价格	Si NPN Epitaxial Planar
SC83053	ETC	获取价格	KEYBOARD ENCODER

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