参数资料
| 型号： | NCP1835BMNR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 11/14页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHARGER LI-ION 10-DFN |
| 产品变化通告： | Product Discontinuation 30/Sept/2011 |
| 标准包装： | 3,000 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 2.8 V ~ 6.5 V |
| 工作温度： | -20°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-VFDFN 裸露焊盘 |
| 供应商设备封装： | 10-DFN（3x3） |
| 包装： | 带卷 (TR) |
NCP1835B
APPLICATION INFORMATION
TOSC + 2
+ 0.2
CTIME dVc
Input and Output Capacitor Selection
A 4.7 m F or higher value ceramic capacitor is
recommended for the input bypass capacitor. For the output
capacitor, when there is no battery inserted and the
NCP1835B is used as an LDO with 4.2 V or 4.242 V output
voltage, a 4.7 m F or higher value tantalum capacitor is
recommended for stability. With the battery attached, the
output capacitor can be any type with the value higher than
0.1 m F.
R ISEL Resistor Selection for Programming Charge
Current
A single resistor, R ISEL, between the ISEL pin and
ground, programs the pre?charge current, full?charge
current, and end?of?charge detection threshold. The
nominal voltage of ISEL is 0.8 V.
70
C TIME Selection for Programming Charge Time
The NCP1835B offers an end?of?charge timeout timer
to prevent the battery from continuously charging which
can cause premature aging or safety issues. The timing
capacitor between TIMER pin and ground, C TIME , sets the
end?of?charge time, TIMEOUT, and the pre?charge
timeout. This capacitor is required for proper device
operation.
The internal oscillator charges C TIME to 1.2 V and then
discharges it to 0.6 V with 6 m A current in one period.
Therefore, the period of the oscillator is:
10 6 CTIME (sec)
IC
(eq. 1)
A 22?binary counter counts every oscillator period until
it reaches the maximum number corresponding to
end?of?charge time, TIMEOUT.
60
TIMEOUT + 2 22
TOSC + 14
CTIME
1 nF
(minute)
50
40
30
20
10
(eq. 2)
The NCP1835B will terminate charging and give a
timeout signal if the battery has not completed charging
within the TIMEOUT period. The timeout signal then
forces the FAULT pin low.
The following Table 2 shows the desired TIMEOUT vs.
C TIME sizes. The C TIME is required for proper device
operation.
0
0
200 400 600 800 1000 1200 1400 1600 1800 2000
R ISEL (k W )
Figure 17. NCP1835 Pre?charge Current
Table 2. TIMEOUT vs. C TIME Size
C TIME (nF)
0.47
1
TIMEOUT (minute)
6.6
14
600
500
400
300
200
5.6
8.2
10
15
33
56
Thermal Considerations
78
115
140
210
462
784
The NCP1835B is housed in a thermally enhanced
100
0
3x3 mm DFN package. In order to deliver the maximum
power dissipation under all conditions, it is very important
that the user solders exposed metal pad under the package
0
200
400
600 800
R ISEL (k W )
1000 1200
1400 1600
to the ground copper area and then connect this area to a
ground plane through thermal vias. This can greatly reduce
Figure 18. NCP1835 Full Charge Current
the thermal impedance of the device and further enhance
its power dissipation capability and thus its output current
capability.
http://onsemi.com
11
相关PDF资料 |
PDF描述 |
|---|---|
| NCP1835MN24T2G | IC BATT CHRGR LIION 4.242V 10DFN |
| NCP3020BDR2G | IC REG CTRLR BUCK PWM VM 8-SOIC |
| NCP304ALSQ43T1G | IC VOLT DETECTOR 4.3V SC-82AB |
| NCP305LSQ49T1 | IC VOLT DETECT OD 4.9V SC-82AB |
| NCP3101CMNTXG | IC REG BUCK SYNC ADJ 6A 40QFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP1835MN20R2 | 功能描述:电池管理 1A Max Single Cell 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 |
| NCP1835MN20R2G | 功能描述:电池管理 1A Max Single Cell Lithium-Ion 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 |
| NCP1835MN24R2 | 功能描述:电池管理 1A Max Single Cell 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 |
| NCP1835MN24R2G | 功能描述:电池管理 1A Max Single Cell Lithium-Ion 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 |
| NCP1835MN24T2 | 功能描述:电池管理 1A Max Single Cell 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 |
发布紧急采购，3分钟左右您将得到回复。