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BQ2004SN Datasheet

  • BQ2004SN

  • Fast-Charge IC

  • 16頁

  • TI

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bq2004
Fast-Charge IC
Features
鉃?/div>
Fast charge and conditioning of
nickel cadmium or nickel-metal
hydride batteries
鉃?/div>
Hysteretic PWM switch-mode
current regulation or gated con-
trol of an external regulator
鉃?/div>
Easily integrated into systems or
used as a stand-alone charger
鉃?/div>
Pre-charge qualification of tem-
perature and voltage
鉃?/div>
Configurable, direct LED outputs
display battery and charge status
鉃?/div>
Fast-charge termination by
鈭?/div>
tem-
perature/鈭?time, peak volume de-
tection, -鈭哣, maximum voltage,
maximum temperature, and maxi-
mum time
鉃?/div>
O pt i o nal t op - of f ch a r g e a nd
pulsed current maintenance
charging
鉃?/div>
Logic-level controlled low-power
mode (< 5碌A(chǔ) standby current)
General Description
The bq2004 Fast Charge IC provides
comprehensive fast charge control
functions together with high-speed
switching power control circuitry on a
monolithic CMOS device.
Integration of closed-loop current
control circuitry allows the bq2004
to be the basis of a cost-effective so-
lution for stand-alone and system-
integrated chargers for batteries of
one or more cells.
Switch-activated discharge-before-
charge allows bq2004-based chargers
to support battery conditioning and
capacity determination.
High-efficiency power conversion is
accomplished using the bq2004 as a
hysteretic PWM controller for
switch-mode regulation of the charg-
ing current. The bq2004 may alterna-
tively be used to gate an externally
regulated charging current.
Fast charge may begin on application
of the charging supply, replacement
of the battery, or switch depression.
For safety, fast charge is inhibited
unless/until the battery tempera-
ture and voltage are within config-
ured limits.
Temperature, voltage, and time are
monitored throughout fast charge.
Fast charge is terminated by any of
the following:
n
Rate of temperature time
(鈭員/鈭唗)
Peak voltage detection (PVD)
Negative delta voltage (-鈭哣)
Maximum voltage
Maximum temperature
Maximum time
n
n
n
n
n
After fast charge, optional top-off
and pulsed current maintenance
phases are available.
Pin Connections
Pin Names
DCMD
DSEL
Discharge command
Display select
Voltage termination
select
Timer mode select 1
Timer mode select 2
Temperature cutoff
Temperature sense
Battery voltage
INH
SNS
LED
1
LED
2
V
SS
V
CC
MOD
DIS
Sense resistor input
Charge status output 1
Charge status output 2
System ground
5.0V
鹵
10% power
Charge current control
Discharge control
output
Charge inhibit input
DCMD
DSEL
VSEL
TM1
TM2
TCO
TS
BAT
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
INH
VSEL
DIS
MOD
VCC
VSS
LED2
LED1
SNS
TM
1
TM
2
TCO
TS
BAT
16-Pin Narrow DIP
or Narrow SOIC
PN2004E01.eps
SLUS063鈥揓UNE 1999 F
1

BQ2004SN 產(chǎn)品屬性

  • 40

  • 集成電路 (IC)

  • PMIC - 電池管理

  • -

  • 充電管理

  • 鎳鎘（NiCd）、鎳金屬氫化物（NiMH）

  • 4.5 V ~ 5.5 V

  • -20°C ~ 70°C

  • 表面貼裝

  • 16-SOIC（0.154"，3.90mm 寬）

  • 16-SOIC N

  • 管件

  • 296-9495-ND - EVAL MOD FOR BQ2004 NICD/NIMH296-9496-ND - EVAL MOD FOR BQ2004 NICD/NIMH

  • 296-9337-5

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