- 您现在的位置：买卖IC网 > PDF目录80307 > LTC4000IGN#TRPBF (LINEAR TECHNOLOGY CORP) 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO28 PDF资料下载
参数资料
| 型号： | LTC4000IGN#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO28 |
| 封装： | 0.150 INCH, LEAD FREE, PLASTIC, SSOP-28 |
| 文件页数： | 18/40页 |
| 文件大小： | 428K |
| 代理商： | LTC4000IGN#TRPBF |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页当前第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页
LTC4000
25
4000f
Figure 12. Empirical Loop Compensation Setup
IOUT
VIN
CSN
CSP
IN
CLN
BAT
GND
LTC4000
50
1W
50
GENERATOR
f = 50Hz
RC
ITH
GND
SWITCHING
CONVERTER
4000 F12
BGATE
ITH
CC
CC
1000F
(OBSERVE
POLARITY)
SCOPE
GROUND
CLIP
10k
A
1k
1500pF
0.015F
B
applicaTions inForMaTion
Generator frequency is set at 50Hz. Lower frequencies
may cause a blinking scope display and higher frequen-
cies may not allow sufficient settling time for the output
transient. Amplitude of the generator output is typically
set at 5VP-P to generate a 100mAP-P load variation. For
lightly loaded outputs (IOUT < 100mA), this level may be
too high for small signal response. If the positive and
negative transition settling waveforms are significantly
different, amplitude should be reduced. Actual amplitude
is not particularly important because it is the shape of
the resulting regulator output waveform which indicates
loop stability.
A 2-pole oscilloscope filter with f = 10kHz is used to
block switching frequencies. Regulators without added
LC output filters have switching frequency signals at their
outputs which may be much higher amplitude than the
low frequency settling waveform to be studied. The filter
frequency is high enough for most applications to pass
the settling waveform with no distortion.
Oscilloscope and generator connections should be made
exactly as shown in Figure 12 to prevent ground loop er-
rors. The oscilloscope is synced by connecting the chan-
nelB probe to the generator output, with the ground clip
of the second probe connected to exactly the same place
as channel A ground. The standard 50Ω BNC sync output
of the generator should not be used because of ground
loop errors. It may also be necessary to isolate either
the generator or oscilloscope from its third wire (earth
ground) connection in the power plug to prevent ground
loop errors in the scope display. These ground loop errors
are checked by connecting channel A probe tip to exactly
the same point as the probe ground clip. Any reading on
channel A indicates a ground loop problem.
Once the proper setup is made, finding the optimum
values for the frequency compensation network is fairly
straightforward. Initially, CC is made large (≥1μF) and RC
is made small (≈10k). This nearly always ensures that the
regulator will be stable enough to start iteration. Now, if
the regulator output waveform is single-pole over damped
(see the waveforms in Figure 13), the value of CC is re-
duced in steps of about 2:1 until the response becomes
slightly under damped. Next, RC is increased in steps of
2:1 to introduce a loop zero. This will normally improve
damping and allow the value of CC to be further reduced.
Shifting back and forth between RC and CC variations will
allow one to quickly find optimum values.
相关PDF资料 |
PDF描述 |
|---|---|
| LTC4155EUFD#TRPBF | POWER SUPPLY SUPPORT CKT, PQCC28 |
| LM4040BIZ-5.0AMMOPACK | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 5 V, PBCY3 |
| L296VH | 4 A SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, PZFM15 |
| LM9140BYM-2.5 | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PDSO8 |
| LK5540-7ERD0TB1 | 2-OUTPUT 150 W AC-DC PWR FACTOR CORR MODULE |
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 |
发布紧急采购，3分钟左右您将得到回复。