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| 型号： | BQ2002ESNTR |
| 厂商： | Texas Instruments |
| 文件页数： | 2/15页 |
| 文件大小： | 0K |
| 描述： | IC CONTROLLER FASTCHRGE 8-SOIC |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 镍镉（NiCd）、镍金属氢化物（NiMH） |
| 电源电压： | 4 V ~ 6 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
| 配用： | 296-9488-ND - EVAL MOD FOR BQ2002 |
bq2002E/G
Pin Descriptions
sumes operation at the point where initially
suspended.
TM
LED
Timer mode input
A three-level input that controls the settings
for the fast charge safety timer, voltage ter-
mination mode, top-off, pulse-trickle, and
voltage hold-off time.
Charging output status
CC
Charge control output
An open-drain output used to control the
charging current to the battery. CC switch-
ing to high impedance (Z) enables charging
current to flow, and low to inhibit charging
current. CC is modulated to provide top-off,
if enabled, and pulse trickle.
Open-drain output that indicates the charging
status.
Functional Description
BAT
V SS
TS
Battery input voltage
The battery voltage sense input. The input to
this pin is created by a high-impedance re-
sistor divider network connected between
the positive and negative terminals of the
battery.
System ground
Temperature sense input
Input for an external battery temperature
Figure 2 shows a state diagram and Figure 3 shows a
block diagram of the bq2002E/G.
Battery Voltage and Temperature
Measurements
Battery voltage and temperature are monitored for
maximum allowable values. The voltage presented on
the battery sense input, BAT, should represent a
single-cell potential for the battery under charge. A
resistor-divider ratio of
V CC
monitoring thermistor.
Supply voltage input
RB1
RB2
=N-1
5.0V ± 20% power input.
is recommended to maintain the battery voltage within
the valid range, where N is the number of cells, RB1 is
INH
Charge inhibit input
When high, INH suspends the fast charge in
progress. When returned low, the IC re-
the resistor connected to the positive battery terminal,
and RB2 is the resistor connected to the negative bat-
tery terminal. See Figure 1.
Note: This resistor-divider network input impedance to
end-to-end should be at least 200k ? and less than 1 M ? .
VCC
PACK +
RT
BAT
RB1
R3
TM
VCC
TS
bq2002E/G
RB2
R4
bq2002E/G
N
T
C
VSS
VSS
BAT pin connection
Mid-level
Thermistor connection
setting for TM
NTC = negative temperature coefficient thermistor.
Fg2002E/G01.eps
Figure 1. Voltage and Temperature Monitoring and TM Pin Configuration
2
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相关代理商/技术参数 |
参数描述 |
|---|---|
| BQ2002ESNTRG4 | 功能描述:电池管理 NiCd/NiMH Charge Controller RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| BQ2002F | 制造商:TI 制造商全称:Texas Instruments 功能描述:NiCd/NiMH Fast-Charge Management ICs |
| BQ2002FPN | 功能描述:电池管理 NiCd/NiMH Gating Charge Mngmnt IC RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| BQ2002FPNE4 | 功能描述:电池管理 NiCd/NiMH Gating Charge Mngmnt IC RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| BQ2002FPNEP | 制造商:BENCHMARQ 功能描述:* |
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