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BQ2002D/T 데이터시트(PDF) 5 Page - Texas Instruments

부품명 BQ2002D/T
상세설명  NiCd/NiMH Fast-Charge Management ICs
PDF  21 Pages
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제조업체  TI2 [Texas Instruments]
홈페이지  https://www.ti.com
Logo TI2 - Texas Instruments

BQ2002D/T 데이터시트(HTML) 5 Page - Texas Instruments

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nique minimizes the effect of any AC line ripple that
may feed through the power supply from either 50Hz or
60Hz AC sources. Tolerance on all timing is
±20%.
Maximum Voltage, Temperature, and Time
Any time the voltage on the BAT pin exceeds the maxi-
mum cell voltage, VMCV, fast charge or optional top-off
charge is terminated.
Maximum temperature termination occurs anytime the
voltage on the TS pin falls below the temperature cut-off
threshold VTCO where
VTCO = 0.225
∗ VCC ±5%
Maximum charge time is configured using the TM pin.
Time settings are available for corresponding charge
rates of C/4, 1C, and 2C. Maximum time-out termina-
tion is enforced on the fast-charge phase, then reset, and
5
bq2002D/T
Part No.
Corresponding
Fast-Charge Rate
TM
Typical Fast-Charge
and Top-Off
Time Limits
(minutes)
Top-Off
Rate
Pulse-
Trickle Rate
Pulse-
Trickle
Period (ms)
bq2002D
C/4
Mid
440
None
None
None
1C
Low
110
None
None
None
2C
High
55
None
None
None
bq2002T
C/4
Mid
320
C/64
C/256
18.3
1C
Low
80
C/16
C/256
73.1
2C
High
40
None
C/128
73.1
Notes:
Typical conditions = 25°C, VCC = 5.0V
Mid = 0.5 * VCC ±0.5V
Tolerance on all timing is
±20%
Table 1. Fast-Charge Safety Time/Top-Off Table
TD2002F1.eps
Fast Charging
VCC = 0
Fast Charging
CC Output
LED
s
s
Charge initiated by application of power
Charge initiated by battery replacement
Pulse-Trickle
Top-Off
(optional,
bq2002T only)
(optional,
bq2002T only)
286
See
Table 1
s
286
4576
Figure 5. Charge Cycle Phases



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