BQ2000TS datasheet, PDF - EEWORLD Datasheet

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BQ2000TS: DescriptionBattery Charge Controller, PDSO8, TSSOP-8; CategoryPower/power management The power supply circuit; File Size164KB，16 Pages; ManufacturerUnitrode Corporation

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BQ2000TS Overview

Battery Charge Controller, PDSO8, TSSOP-8

BQ2000TS Parametric

Parameter Name	Attribute value
Maker	Unitrode Corporation
package instruction	SOP,
Reach Compliance Code	unknown
Is Samacsys	N
Analog Integrated Circuits - Other Types	BATTERY CHARGE CONTROLLER
control mode	CURRENT-MODE
Maximum input voltage	6 V
Minimum input voltage	4 V
Nominal input voltage	5 V
JESD-30 code	R-PDSO-G8
Number of functions	1
Number of terminals	8
Maximum operating temperature	70 °C
Minimum operating temperature	-20 °C
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Certification status	Not Qualified
surface mount	YES
Switch configuration	PUSH-PULL
Maximum switching frequency	500 kHz
Temperature level	COMMERCIAL
Terminal form	GULL WING
Terminal location	DUAL
Base Number Matches	1

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bq2000

Programmable Multi-Chemistry

Fast-Charge Management IC

Features

➤

S af e m an ag em e nt o f fa s t

charge for NiCd, NiMH, or Li-

Ion battery packs

High-frequency switching con-

troller for efficient and simple

charger design

Pre-charge qualification for

detecting shorted, damaged, or

overheated cells

Fast-charge termination by

peak voltage (PVD), minimum

current (Li-Ion), maximum

temperature, and maximum

charge time

Selectable top-off mode for

achieving maximum capacity in

NiMH batteries

Programmable trickle-charge

mode for reviving deeply dis-

charged batteries and for post-

charge maintenance

Built-in battery removal and

insertion detection

S l e e p m od e f o r l o w p o we r

consumption

General Description

The bq2000 is a programmable,

monolithic IC for fast-charge manage-

ment of nickel cadmium (NiCd),

nickel metal-hydride (NiMH), or lith-

ium-ion (Li-Ion) batteries in single- or

multi-chemistry applications. The

bq2000 detects the battery chemistry

and proceeds with the optimal charg-

ing and termination algorithms. This

process eliminates undesirable under-

charged or overcharged conditions

and allows accurate and safe termi-

nation of fast charge.

Depending on the chemistry, the

bq2000 provides a number of charge

termination criteria:

➤

For safety, the bq2000 inhibits fast

charge until the battery voltage and

temperature are within user-defined

limits. If the battery voltage is below

the low-voltage threshold, the

bq 20 00 u s e s t r ick le - ch a r ge t o

condition the battery. For NiMH

batteries, the bq2000 provides an

optional top-off charge to maximize

the battery capacity.

The integrated high-frequency com-

parator allows the bq2000 to be the

basis for a complete, high-efficiency

power-conversion circuit for both

nickel-based and lithium-based

chemistries.

➤

Peak voltage, PVD (for NiCd and

NiMH)

Minimum charging current (f or

Li-Ion)

Maximum temperature

Maximum charge time

➤

Pin Connections

Pin Names

SNS

Current-sense input

System ground

Charge-status

output

Battery-voltage

input

MOD

Temperature-sense

input

Timer-program input

Supply-voltage input

Modulation-control

output

SNS

VSS

LED

BAT

MOD

VCC

LED

BAT

8-Pin DIP or Narrow SOIC

or TSSOP

PN-2000.eps

SLUS138A–FEBRUARY 2000 E

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