Datasheet Linear Technology LT1505 — 数据表

制造商	Linear Technology
系列	LT1505

恒流/电压高效电池充电器

数据表

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PDF, 170 Kb, 语言: en, 文件上传: Oct 2, 2017, 页数: 16
Constant-Current/Voltage High Efficiency Battery Charger

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价格

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	LT1505CG#PBF	LT1505CG#TRPBF	LT1505CG-1#PBF	LT1505CG-1#TRPBF
N	1	2	3	4
Package	SSOP-28 包装外形图	SSOP-28 包装外形图	SSOP-28 包装外形图	SSOP-28 包装外形图
Package Code	G	G	G	G
Package Index	05-08-1640 (G28)	05-08-1640 (G28)	05-08-1640 (G28)	05-08-1640 (G28)
Pin Count	28	28	28	28

参数化

Parameters / Models	LT1505CG#PBF	LT1505CG#TRPBF	LT1505CG-1#PBF	LT1505CG-1#TRPBF
Battery Chemistry	Li-Ion, Li-Polymer, NiCd, NiMH, Lead Acid	Li-Ion, Li-Polymer, NiCd, NiMH, Lead Acid	Li-Ion, Li-Polymer, NiCd, NiMH, Lead Acid	Li-Ion, Li-Polymer, NiCd, NiMH, Lead Acid
Charge Termination	Microcontroller	Microcontroller	Microcontroller	Microcontroller
Demo Boards	DC219A	DC219A	DC219A	DC219A
Design Tools	LTspice Model	LTspice Model	LTspice Model	LTspice Model
Export Control	no	no	no	no
Float Voltage, V	Adj	Adj	Adj	Adj
Internal Pass Element	no	no	no	no
Max Charge Current, A	4	4	4	4
Number of Cells	1 to 4 (Li), 1 to 12 (Ni)	1 to 4 (Li), 1 to 12 (Ni)	1 to 4 (Li), 1 to 12 (Ni)	1 to 4 (Li), 1 to 12 (Ni)
Operating Temperature Range, °C	0 to 70	0 to 70	0 to 70	0 to 70
Type of Charger	Switching	Switching	Switching	Switching
Vin Max, V	26	26	26	26
Vin Min, V	11	11	11	11

生态计划

	LT1505CG#PBF	LT1505CG#TRPBF	LT1505CG-1#PBF	LT1505CG-1#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

设计须知

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Li-Ion Charge Termination IC Interfaces with PWM Switchers &mdash DN242
PDF, 74 Kb, 档案已发布: Oct 2, 2001
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Li-Ion Charge Termination IC Interfaces with PWM Switchers
Design Note 242
Fran Hoffart
Rechargeable lithium-ion batteries are rapidly becoming the battery of choice for many battery-powered
products. These products include notebook computers, PDAs, video camcorders, digital cameras, cellular
phones, portable test equipment and others. Compared
to other rechargeable power sources, Li-Ion batteries
have higher energy density for both weight and volume
and provide longer run time between charges. tery from overtemperature and overcurrent conditions.
In addition, battery packs may also contain back-toback MOSFET switches that disconnect the battery if
an overcurrent condition exists for either charge or
discharge, or if an overvoltage or undervoltage condition exists. Many of these precautions are needed
because lithium-ion cells are easily damaged by both
overcharge and overdischarge conditions. Charging Li-Ion batteries is a relatively simple process.
Apply a current-limited (at a 1C rate) constant voltage
(В±1% tolerance) for approximately three hours, then
stop charging. (C is a battery term used to indicate
the Ampere-hour capacity of a battery). A complete
charge cycle may also include precharge qualiп¬Ѓcation
for battery temperature and precharge qualiп¬Ѓcation for
deeply discharged batteries. LTВ®1510 Battery Charger IC
The LT1510 is a high efп¬Ѓciency switching regulator
power IC designed speciп¬Ѓcally for battery charging …
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Simple Li-Ion Charge Termination Using the LT1505 &mdash DN244
PDF, 73 Kb, 档案已发布: Nov 2, 2001
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Simple Li-Ion Charge Termination Using the LT1505
Design Note 244
Mark Gurries The LT1505 provides a logic signal output called
вЂњFLAGвЂќ that is intended to help implement a Li-Ion
charge termination mechanism. In the constant voltage portion of the charge cycle, the battery continues
to accept charge and the charge current continues to
drop. When the charge current drops below 20% of
the full-scale value, the FLAG output goes low.
Normally, the FLAG function is used to let the system
know that the battery is nearly fully charged. However,
the п¬‚ag can also be used to change the time scale of
the overall charge-cycle timer and convert it to a topoff charge timer. Thus, the user gets a battery that
is almost fully charged, but the charger remains on
so that the remaining time can be used to charge the
battery to 100%, after which the charger will turn off.
The nature of Li-Ion battery charging is such that the
battery spends about half of the total charge time
receiving about 85% of its capacity and the remaining
half to receive the last 15%. The LT1505вЂ™s 20% current
threshold represents a compromise between charge
time and a fully charged battery. It represents around
85% of a typical batteryвЂ™s charge capacity.
11/00/244_conv 5 1C CHARGE RATE …

文章

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Fast Rate Li-Ion Battery Charger &mdash LT Journal
PDF, 58 Kb, 档案已发布: Feb 1, 1999
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DESIGN FEATURES Fast Rate Li-Ion Battery Charger
by Goran Perica Introduction
The recent trend in notebook computers has been toward increasing
battery operating time and faster
processor speeds. These two requirements, in conjunction with a need for
faster battery recharging (1вЂ“2 hours)
have placed a strain on battery charging circuits and wall adapters. A
typical notebook computer system
configuration is shown in Figure 1.
Wall adapters are typically AC/DC
converters with a 20V output at
3AвЂ“4A of load current. When a notebook computer is running, all of the
available current from the wall adapter
may be consumed by the system,
with no power left for charging the
battery. However, as soon as the
systemвЂ™s power requirements drop
below the wall adapterвЂ™s current limit,
the battery charging can resume. In
order to recharge the battery in the
shortest time possible, the recharging should start as soon as there is
any current left over from the system.
The ideal situation is when the sum of …

模型线

系列: LT1505 (4)

LT1505CG#PBF LT1505CG#TRPBF LT1505CG-1#PBF LT1505CG-1#TRPBF

制造商分类

Power Management > Battery Management > Battery Charger IC > Switching Battery Chargers