参数资料
| 型号： | LTC4000IGN#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 32/40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
? ? C C s + 1 ?
? ? R C –
L BV (s) = g m6 ?
? ?
? ? ? R
? ? Gmo p (s)
C C s + 1 ?
? ? R C –
? g m10 ?
L CC (s) = g m5 ? ? ?
? ( R2 ? C IBMON s + 1 ) ? R L
( R1 + R2 ) C IBMON s + 1 ? R f + R L
? ( R L P R f ) C L s + 1 ?
R C
R O10
A10
–
CSN
In Figure 22 the battery is approximated to be a signal
ground in series with the internal battery resistance R BAT .
Therefore, the simplified loop transmission is as follows:
? ? 1 ? ?
? g m10
? C C s ?
? ?
? ?
? R BFB2 ? ? R LB ?
?
? R BFB ? ? LB ? C L s + 1 ?
where Gmo p (s) is the transfer function from V ITH to
the output current of the external DC/DC converter,
R BFB = R BFB1 + R BFB2 , and R LB = R L //(R DS(ON) + R CS +
R BAT ) represents the effective output resistance from the
LOAD node to GND.
The Battery Charge Current Regulation Loop
This final regulation loop combines certain dynamic char-
acteristics that are found in all the other three loops. The
feedback signal for this charge current regulation loop is
the sense voltage across the charge current sense resis-
tor (R CS ). This voltage is amplified by a factor of 20 and
compared to the voltage on the CL pin by the transcon-
ductance error amplifier (A5). In a familiar fashion, this
amplifier drives the output transconductance amplifier
(A10) to appropriately adjust the voltage on the ITH pin
driving the external DC/DC converter to regulate the input
current across the sense resistor (R CS ).
Due to the presence of the instant-on feature, description
of the charge current regulation loop has to be divided into
two separate operating regions. These regions of operation
depend on whether the voltage on the OFB pin is higher
or lower than the instant-on threshold (V OUT(INST_ON) ).
The Battery Charge Current Regulation Loop when
V OFB > V OUT(INST_ON)
In this operating region, the external charging PFET’s gate
is driven low and clamped at V BGATE(ON) . The detail of this
loop is shown in Figure 23.
The simplified loop transmission is:
? ? 1 ? ?
? C C s ?
? ?
? ?
20R CS ? ? ? ? ?
?
? 1 ?
? ? ? Gmo p (s)
where Gmo p (s) is the transfer function from V ITH to the
output current of the external DC/DC converter, R f =
R CS + R DS(ON) + R BAT , and R L //R f represents the effective
resistance value resulting from the parallel combination
of R L and R f .
C C
ITH CC LTC4000
INPUT
g m10 = 0.1m
+
Gmo p (s)
–
R O5
A5
g m5 = 0.5m
A8 C L R L
g m8 = 0.33m CSP
BIAS 1V +
R CS
50μA/ R1 R2
5μA 60k 20k
R DS(ON)
CL
R CL
IBMON
C IBMON
BAT
4000 F23
R BAT
Figure 23. Simplified Linear Model of the Charge Current
Regulation Loop with the External Charging PFET Driven On
4000fb
32
For more information www.linear.com/LTC4000
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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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