參數(shù)資料
型號: DC1562A-F
廠商: Linear Technology
文件頁數(shù): 8/34頁
文件大?。?/td> 0K
描述: BOARD EVAL LTC6992-4
設計資源: DC1562A Design Files
DC1562A Schematic
特色產品: TimerBlox?
標準包裝: 1
系列: TimerBlox®
主要目的: 計時,時鐘振蕩器
嵌入式:
已用 IC / 零件: LTC6992-4
主要屬性: 10KHz PWM,5 - 100% 占空比
次要屬性: 2.25 V ~ 5.5 V 電源
已供物品:
LTC6992-1/LTC6992-2/
LTC6992-3/LTC6992-4
16
69921234fc
Pulse Width (Duty Cycle) Modulation
The MOD pin is a high impedance analog input providing
direct control of the output duty cycle. The duty cycle is
proportional to the voltage applied to the MOD pin, VMOD.
Duty Cycle = D =
VMOD
0.8 VSET
1
8
The PWM duty cycle accuracy
D specifies that the above
equation is valid to within ±4.5% for VMOD between 0.2
VSET and 0.8 VSET (12.5% to 87.5% duty cycle).
Since VSET = 1V ±30mV, the duty cycle equation may be
approximated by the following equation.
Duty Cycle = D
VMOD 100mV
800mV
The VMOD control range is approximately 0.1V to 0.9V.
Driving VMOD beyond that range (towards GND or V+) will
have no further affect on the duty cycle.
Duty Cycle Limits
The only difference between the four versions of the
LTC6992 is the limits, or clamps, placed on the output
duty cycle. The LTC6992-1 generates output duty cycles
ranging from 0% to 100%. At 0% or 100% the output
will stop oscillating and rest at GND or V+, respectively.
The LTC6992-2 will never stop oscillating, regardless of
the VMOD level. Internal clamping circuits limit its duty
cycle to a 5% to 95% range (1% to 99% guaranteed).
Therefore, its VMOD control range is 0.14 VSET to 0.86
VSET (approximately 0.14V to 0.86V).
The LTC6992-3 and LTC6992-4 complete the family by
providing one-sided clamping. The LTC6992-3 allows
0% to 95% duty cycle, and the LTC6992-4 allows 5% to
100% duty cycle.
Output Polarity (POL Bit)
The duty cycle equation describes a proportional transfer
function, where duty cycle increases as VMOD increases.
The LTC6992 includes a POL bit (determined by the
DIVCODE as described earlier) that inverts the output
signal. This makes the duty cycle gain negative, reducing
duty cycle as VMOD increases.
operaTion
Figure 3. POL Bit Functionality
6992 F03
OUT
POL = 1
tOUT
DtOUT
OUT
POL = 0
tOUT
DtOUT
D
=
VMOD
0.8 VSET
1
8
D
= 1
VMOD
0.8 VSET
1
8
相關PDF資料
PDF描述
ILC0603ERR12K INDUCTOR CER 120NH 0603
GEM28DTKI-S288 CONN EDGECARD 56POS .156 EXTEND
GEC18DRYS-S734 CONN EDGECARD 36POS DIP .100 SLD
EBM25DCST-S288 CONN EDGECARD 50POS .156 EXTEND
DC1562A-B BOARD EVAL LTC6991
相關代理商/技術參數(shù)
參數(shù)描述
DC1562A-G 功能描述:BOARD EVAL LTC6993-1 RoHS:是 類別:編程器,開發(fā)系統(tǒng) >> 評估演示板和套件 系列:TimerBlox® 標準包裝:1 系列:- 主要目的:數(shù)字電位器 嵌入式:- 已用 IC / 零件:AD5258 主要屬性:- 次要屬性:- 已供物品:板 相關產品:AD5258BRMZ1-ND - IC POT DGTL I2C1K 64P 10MSOPAD5258BRMZ10-ND - IC POT DGTL I2C 10K 64P 10MSOPAD5258BRMZ100-ND - IC POT DGTL I2C 100K 64P 10MSOPAD5258BRMZ50-ND - IC POT DGTL I2C 50K 64P 10MSOPAD5258BRMZ1-R7-ND - IC POT DGTL I2C 1K 64P 10MSOPAD5258BRMZ10-R7-ND - IC POT DGTL I2C 10K 64P 10MSOPAD5258BRMZ50-R7-ND - IC POT DGTL I2C 50K 64P 10MSOPAD5258BRMZ100-R7-ND - IC POT DGTL I2C 100K 64P 10MSOP
DC1562A-H 功能描述:BOARD EVAL LTC6993-2 RoHS:是 類別:編程器,開發(fā)系統(tǒng) >> 評估演示板和套件 系列:TimerBlox® 標準包裝:1 系列:- 主要目的:電信,線路接口單元(LIU) 嵌入式:- 已用 IC / 零件:IDT82V2081 主要屬性:T1/J1/E1 LIU 次要屬性:- 已供物品:板,電源,線纜,CD 其它名稱:82EBV2081
DC1562A-I 功能描述:BOARD EVAL LTC6993-3 RoHS:是 類別:編程器,開發(fā)系統(tǒng) >> 評估演示板和套件 系列:TimerBlox® 標準包裝:1 系列:- 主要目的:數(shù)字電位器 嵌入式:- 已用 IC / 零件:AD5258 主要屬性:- 次要屬性:- 已供物品:板 相關產品:AD5258BRMZ1-ND - IC POT DGTL I2C1K 64P 10MSOPAD5258BRMZ10-ND - IC POT DGTL I2C 10K 64P 10MSOPAD5258BRMZ100-ND - IC POT DGTL I2C 100K 64P 10MSOPAD5258BRMZ50-ND - IC POT DGTL I2C 50K 64P 10MSOPAD5258BRMZ1-R7-ND - IC POT DGTL I2C 1K 64P 10MSOPAD5258BRMZ10-R7-ND - IC POT DGTL I2C 10K 64P 10MSOPAD5258BRMZ50-R7-ND - IC POT DGTL I2C 50K 64P 10MSOPAD5258BRMZ100-R7-ND - IC POT DGTL I2C 100K 64P 10MSOP
DC1562A-J 功能描述:BOARD EVAL LTC6993-4 RoHS:是 類別:編程器,開發(fā)系統(tǒng) >> 評估演示板和套件 系列:TimerBlox® 標準包裝:1 系列:- 主要目的:電信,線路接口單元(LIU) 嵌入式:- 已用 IC / 零件:IDT82V2081 主要屬性:T1/J1/E1 LIU 次要屬性:- 已供物品:板,電源,線纜,CD 其它名稱:82EBV2081
DC1562A-K 功能描述:BOARD EVAL LTC6994-1 RoHS:是 類別:編程器,開發(fā)系統(tǒng) >> 評估演示板和套件 系列:TimerBlox® 標準包裝:1 系列:- 主要目的:電信,線路接口單元(LIU) 嵌入式:- 已用 IC / 零件:IDT82V2081 主要屬性:T1/J1/E1 LIU 次要屬性:- 已供物品:板,電源,線纜,CD 其它名稱:82EBV2081