参数资料
| 型号： | LTC4000IGN#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 27/40页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER BATTERY 28-SSOP |
| 产品培训模块： | LTC4000 60V Battery Charging Controller and Power Management |
| 标准包装： | 2,500 |
| 系列： | PowerPath™ |
| 功能： | 充电管理，电源管理 |
| 电池化学： | 多化学 |
| 电源电压： | 3 V ~ 60 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 28-SSOP |
| 包装： | 带卷 (TR) |
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LTC4000
APPLICATIONS INFORMATION
R OFB1 = ?
? 1 ? ? 127k ? ≈ 1.15M ?
? Thechargeterminationtimeissetat2.9hoursaccord-
ing to the following formula:
C TMR (nF) = t TERMINATE (h) ? 34.6 = 2.9 ? 34.6 = 100nF
? The C/X current termination level is programmed at 1A
according to the following formula:
R CX = ( 1A ? 5m ? ) + 0.5mV ≈ 22.1k ?
0.25μA
Note that in this particular solution, the timer termina-
tion is selected since a capacitor connects to the TMR
pin. Therefore, this C/X current termination level only
applies to the CHRG indicator pin.
? The output voltage regulation level is set at 12V accord-
ing to the following formula:
? 12 ?
? 1.193 ?
? The instant-on voltage level is consequently set at 9.79V
according to the following formula:
? The range of valid temperature for charging is set at
–1.5°C to 41.5°C by picking a 10k Vishay Curve 2 NTC
thermistor that is thermally coupled to the battery, and
connecting this in series with a regular 10k resistor to
the BIAS pin.
? For compensation, the procedure described in the
empirical loop compensation section is followed. As
recommended, first a 1μF C C and 10k R C is used, which
sets all the loops to be stable. For an example of typical
transient responses, the charge current regulation loop
when V OFB is regulated to V OUT(INST_ON) is used here.
Figure 15 shows the recommended setup to inject a
DC-coupled charge current variation into this particular
loop. The input to the CL pin is a square wave at 70Hz
with the low level set at 120mV and the high level set
at 130mV, corresponding to a 1.2A and 1.3A charge
current (100mA charge current step). Therefore, in this
particular example the trickle charge current regulation
stability is examined. Note that the nominal trickle
charge current in this example is programmed at 1.25A
(R CL = 24.9kΩ).
V INST _ ON =
1150k ? + 127k ?
127k ?
? 0.974V = 9.79V
The worst-case power dissipation during instant-on
operation can be calculated as follows:
? During trickle charging:
B
A
10k
1500pF
1k
0.015μF
IBMON
LTC4000
P TRKL = ?? 0.86 ? V FLOAT – V BAT ?? ? I CLIM _ TRKL
= [ 0.86 ? 10.8 ] ? 1A
= 9.3W
SQUARE WAVE
GENERATOR
f = 60Hz
CL
4000 F15
? And beyond trickle charging:
P INST _ ON = ?? 0.86 ? V FLOAT – V BAT ?? ? I CLIM
= [ 0.86 ? 10.8 – 7.33 ] ? 10A
= 19.3W
Figure 15. Charge Current Regulation Loop Compensation Setup
Therefore, depending on the layout and heat sink avail-
able to the charging PMOS, the suggested PMOS over
temperature detection circuit included in Figure 7 may
need to be included. For the complete application circuit,
please refer to Figure 25.
4000fb
For more information www.linear.com/LTC4000
27
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| LTC4000IUFD#PBF | 功能描述:IC CHARGER BATTERY 28-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:PowerPath™ 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LTC4000IUFD#TRPBF | 功能描述:IC CHARGER BATTERY 28-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:PowerPath™ 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LTC4000IUFD-1#PBF | 功能描述:IC BATT CHRGR MULTI-CHEM 28QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:PowerPath™ 标准包装:2,000 系列:Impedance Track™ 功能:燃料，电量检测计/监控器 电池化学:锂离子（Li-Ion） 电源电压:2.4 V ~ 2.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:20-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:20-TSSOP 包装:带卷 (TR) 产品目录页面:1020 (CN2011-ZH PDF) 配用:BQ27350EVM-ND - BQ27350EVM 其它名称:296-21665-2 |
| LTC4000IUFD-1#TRPBF | 功能描述:IC CHARGE MGMT MULTI CHEM 28QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:PowerPath™ 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LTC4001 | 制造商:LINER 制造商全称:Linear Technology 功能描述:2A Synchronous Buck Li-Ion Charger |
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