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| 型号： | DS2710G+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/12页 |
| 文件大小： | 0K |
| 描述： | IC NIMH CHRGR SGL-CELL 10-TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 178 |
| 功能： | 充电管理 |
| 电池化学： | 镍金属氢化物 |
| 电源电压： | 4 V ~ 5.5 V |
| 工作温度： | -20°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-TDFN-EP（3x4） |
| 包装： | 管件 |
| 产品目录页面： | 1436 (CN2011-ZH PDF) |
Single-Cell NiMH Charger
Charge-Current Regulation
The DS2710 regulates charge current by maintaining a
constant average voltage across an external sense
resistor connected between the VN1 and VN0 pins.
VN1 and VN0 drive an internal comparator in the
DS2710 to switch the CS output ON and OFF to drive a
regulating pnp bipolar or a pMOS transistor. Hysteresis
on the comparator input provides noise rejection. The
DS2710 regulates the charge current during FAST-
CHARGE to maintain a voltage drop across the sense
resistor as follows:
V SENSE = V IREF - 0.5 x V HYS-COMP = 0.113V (typ)
Figure 3 shows the sense resistor voltage and CS pin
voltage of the regulating circuit during normal operation.
Charging with Load Applied
NiMH cells have a low, but finite, impedance. If load
current is flowing out of the battery, an internal voltage
drop appears at the battery terminals. This can interfere
with the CTEST and - Δ V detection. If the load current is
variable, early termination is more likely than if the load
current is constant. If the load’s ground is connected to
the negative terminal of the cell (VN0), load current
flows through the current-sense resistor, resulting in less
Table 1. THM Thresholds
charge current to the battery. The load-current return
path should be to charger ground to reduce the likeli-
hood of false termination or impedance-test errors.
Charging with load applied is not recommended.
Temperature Monitoring
Accurate temperature sensing is needed to detect tem-
perature FAULT conditions. Connecting an external
10k Ω NTC thermistor between THM and V SS and a
10k Ω bias resistor between V DD and THM allows the
DS2710 to sense temperature. To accurately monitor
the cell, the thermistor should make physical contact
either to the cell or cell tabs. Table 1 shows several rec-
ommended 10k Ω thermistors.
MIN, MAX Temperature Compare
The voltage thresholds of the THM input (V THM-MIN ,
V THM-MAX ) are set to allow charging to start if the ther-
mistor temperature is between 0 ° C and +45 ° C when
using the recommended 10k Ω bias resistor and 10k Ω
thermistor circuit. If precharging is in progress and the
voltage on THM reaches V THM-STOP , precharging
stops and a FAULT condition is generated. If the volt-
age on THM reaches V THM-STOP during FAST-
CHARGE or TOP-OFF, charging stops and the DS2710
enters the MAINTENANCE state. FAST-CHARGE and
THM THRESHOLD
RATIO OF V CBIAS
THERMISTOR
RESISTANCE
(k )
TEMPERATURE ( ° C)
Fenwal
Semitec 103AT-2 197-103LAG-A01,
173-103LAF-301
MIN
MAX
STOP
0.73
0.33
0.29
NOT DRAWN TO SCALE
V OH1
27.04
4.925
4.085
0.75
0
+45
+50
DIVIDER OUTPUT
+4
+42
+47
V CS
V OL1
V IREF
0.70
0.65
0.60
0.55
0.50
0.45
V SENSE
V SENSE (DC)
0.40
0.35
0.30
V IREF - V HYS-COMP
0
10
20
30
40
50
TIME
Figure 3. Ideal Comparator Input and Charge Control Output
Waveforms
TEMPERATURE ( ° C)
Figure 4. Ratio of THM Pin to V DD Pin Over Temperature
8
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相关代理商/技术参数 |
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| DS2710G+ | 功能描述:电池管理 Single-Cell NiMH Charger 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 |
| DS2710G+T&R | 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:CHGR NIMH 10TDFN EP - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC NIMH CHRGR SGL-CELL 10-TDFN |
| DS2710G+T&R | 功能描述:电池管理 Single-Cell NiMH Charger 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 |
| DS2710K | 功能描述:电源管理IC开发工具 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| DS2711 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Loose Cell NiMH Chargers |
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