SC820 datasheet(1/22 Pages) SEMTECH

tên linh kiện	SC820

Giải thích chi tiết về linh kiện	Adapter/USB Dual Input Single-cell Li-ion Charger

PDF	22 Pages

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nhà sản xuất	SEMTECH [Semtech Corporation]

Trang chủ	http://www.semtech.com

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POWER MANAGEMENT

1

SC820

Adapter/USB Dual Input

Single-cell Li-ion Charger

Features

Input voltage protection — 30V

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

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

Pb free, Halogen free, and RoHS/WEEE compliant

Applications

Mobile phones

MP3 players

GPS handheld receivers

Description

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.

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.

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.

Device

Load

Battery

Pack

2.2

μF

USB Vbus

2.2

μF

VADAPTER

2.2

μF

IPUSB

IPRGM

VUSB

SC820

GND

STATB

ENB

BAT

VAD

Typical Application Circuit

September 17, 2009

Số phần tương tự - SC820

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Semtech Corporation	SC820	349Kb / 21P	Adapter/USB Dual Input Single-cell Li-ion Charger
SamHop Microelectronics...	SC8200	99Kb / 5P	Dual N-Channel Enhancement Mode Field Effect Transistor
Silan Microelectronics ...	SC8201	565Kb / 9P	ONE-CELL LI BATTERY PROTECTION CIRCUIT
	SC8204	215Kb / 9P	FAN REMTORE CONTROL DECODER
	SC8204A4F	215Kb / 9P	FAN REMTORE CONTROL DECODER

More results

Mô tả tương tự - SC820

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Semtech Corporation	SC810	298Kb / 19P	Single Input/Single Mode Single-cell Li-ion Charger
	SC811	373Kb / 23P	Adapter/USB Tri-Mode Single-cell Li-ion Charger
	SC820	349Kb / 21P	Adapter/USB Dual Input Single-cell Li-ion Charger
Texas Instruments	BQ24090	1Mb / 31P	1A, Single-Input, Single Cell Li-Ion Battery Charger
	BQ24090	1Mb / 32P	1A, Single-Input, Single Cell Li-Ion Battery Charger
	BQ24090	1Mb / 32P	1A, Single-Input, Single Cell Li-Ion Battery Charger
	BQ24090	1Mb / 34P	1A, Single-Input, Single Cell Li-Ion Battery Charger
Semtech Corporation	SC810	320Kb / 20P	Single Input/Single Mode Single-cell Li-ion Charger
Fairchild Semiconductor	FAN5400	559Kb / 5P	USB-Compliant Single-Cell Li-Ion Switching Charger
First Silicon Co., Ltd	FC4057A420QD16	1Mb / 40P	2A Synchronous Buck Single Cell Li-Ion USB/Adapter Charger

More results

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SC820 bảng dữ liệu(HTML) 1 Page - Semtech Corporation

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