- 您现在的位置：买卖IC网 > PDF目录79878 > LTC3869IGN-2#TRPBF (LINEAR TECHNOLOGY CORP) SWITCHING CONTROLLER, PDSO28 PDF资料下载
参数资料
| 型号： | LTC3869IGN-2#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, PDSO28 |
| 封装： | 0.150 INCH, LEAD FREE, PLASTIC, SSOP-28 |
| 文件页数： | 11/40页 |
| 文件大小： | 2705K |
| 代理商： | LTC3869IGN-2#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页当前第11页第12页第13页第14页第15页第16页第17页第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
LTC3869/LTC3869-2
19
3869f
APPLICATIONS INFORMATION
Output Voltage Tracking
The LTC3869 allows the user to program how its output
ramps up and down by means of the TK/SS pins. Through
these pins, the output can be set up to either coincidentally
or ratiometrically track another supply’s output, as shown
in Figure 5. In the following discussions, VOUT1 refers to
the LTC3869’s output 1 as a master channel and VOUT2
refers to the LTC3869’s output 2 as a slave channel. In
practice, though, either phase can be used as the master.
To implement the coincident tracking in Figure 5a, con-
nect an additional resistive divider to VOUT1 and connect
its midpoint to the TK/SS pin of the slave channel. The
ratio of this divider should be the same as that of the
slave channel’s feedback divider shown in Figure 6a. In
this tracking mode, VOUT1 must be set higher than VOUT2.
To implement the ratiometric tracking in Figure 6b, the
ratio of the VOUT2 divider should be exactly the same as
the master channel’s feedback divider shown in Figure 6b.
By selecting different resistors, the LTC3869 can achieve
different modes of tracking including the two in Figure 5.
So which mode should be programmed? While either
mode in Figure 5 satisfies most practical applications,
some tradeoffs exist. The ratiometric mode saves a pair
of resistors, but the coincident mode offers better output
regulation.
When the master channel’s output experiences dynamic
excursion (under load transient, for example), the slave
channel output will be affected as well. For better output
regulation, use the coincident tracking mode instead of
ratiometric.
Figure 5. Two Different Modes of Output Voltage Tracking
Figure 6. Setup for Coincident and Ratiometric Tracking
TIME
(5a) Coincident Tracking
VOUT1
VOUT2
OUTPUT
VOLTAGE
3869 F05a
VOUT1
VOUT2
TIME
3869 F08b
(5b) Ratiometric Tracking
OUTPUT
VOLTAGE
R3
R1
R4
R2
R3
VOUT2
R4
(6a) Coincident Tracking Setup
TO
VFB1
PIN
TO
TK/SS2
PIN
TO
VFB2
PIN
VOUT1
R1
R2
R3
VOUT2
R4
3869 F09
(6b) Ratiometric Tracking Setup
TO
VFB1
PIN
TO
TK/SS2
PIN
TO
VFB2
PIN
VOUT1
相关PDF资料 |
PDF描述 |
|---|---|
| LX1661CDT | 1.5 A SWITCHING CONTROLLER, PDSO16 |
| LS4001-9PV2TB1 | 1-OUTPUT 100 W AC-DC PWR FACTOR CORR MODULE |
| LH3020-2D5 | 3-OUTPUT AC-DC UNREG PWR SUPPLY MODULE |
| LK1001-7ERD6TB1 | 1-OUTPUT 150 W AC-DC REG PWR SUPPLY MODULE |
| LT1029MZ | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 5 V, PBCY3 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3869IUFD#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 28-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:2,000 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:1MHz 占空比:50% 电源电压:9 V ~ 10 V 降压:无 升压:是 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:8-TSSOP（0.173"，4.40mm 宽） 包装:带卷 (TR) |
| LTC3869IUFD#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 28-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3872EDDB#PBF | 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Step Up 2.75V to 9.8V Input 8-Pin DFN EP 制造商:Linear Technology 功能描述:BOOST 2.75 - 9.8V 550KHZ 8D 制造商:Linear Technology 功能描述:BOOST, 2.75 - 9.8V, 550KHZ, 8DFN |
| LTC3872EDDB#TRMPBF | 功能描述:IC REG CTRLR BST PWM CM 8-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3872EDDB#TRPBF | 功能描述:IC REG CTRLR BST PWM CM 8-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
发布紧急采购，3分钟左右您将得到回复。