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参数资料
| 型号： | LTC6992IS6-1#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 0.02 A SWITCHING CONTROLLER, PDSO6 |
| 封装： | 1 MM HEIGHT, LEAD FREE, PLASTIC, MO-193, TSOT-23, 6 PIN |
| 文件页数： | 8/34页 |
| 文件大小： | 2577K |
| 代理商： | LTC6992IS6-1#TRPBF |
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LTC6992-1/LTC6992-2/
LTC6992-3/LTC6992-4
16
69921234fb
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
V
MOD
0.8 V
SET
1
8
D 1
V
MOD
0.8 V
SET
1
8
相关PDF资料 |
PDF描述 |
|---|---|
| LTC6992IS6-2#TRPBF | 0.02 A SWITCHING CONTROLLER, PDSO6 |
| LTC6992HS6-3#TRMPBF | 0.02 A SWITCHING CONTROLLER, PDSO6 |
| LTC6992IS6-1#TRMPBF | 0.02 A SWITCHING CONTROLLER, PDSO6 |
| LTC6992CS6-2#TRPBF | 0.02 A SWITCHING CONTROLLER, PDSO6 |
| LTC6992CS6-1#TRPBF | 0.02 A SWITCHING CONTROLLER, PDSO6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC6992IS6-2#PBF | 制造商:Linear Technology 功能描述:Bulk |
| LTC6992IS6-2#TRMPBF | 功能描述:IC OSC SILICON 1MHZ TSOT23-6 RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 可编程计时器和振荡器 系列:TimerBlox® 标准包装:3,000 系列:- 类型:振荡器 - 晶体 计数:- 频率:- 电源电压:2.3 V ~ 5.5 V 电流 - 电源:1.07mA 工作温度:-30°C ~ 80°C 封装/外壳:SOT-665 包装:带卷 (TR) 供应商设备封装:SS迷你型-5D 安装类型:表面贴装 其它名称:AN8955SSMTXLTR |
| LTC6992IS6-2#TRPBF | 功能描述:IC OSC SILICON 1MHZ TSOT23-6 RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 可编程计时器和振荡器 系列:TimerBlox® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:45 系列:- 类型:温度 - 补偿晶体振荡器（TCXO） 计数:- 频率:25MHz 电源电压:3.135 V ~ 3.465 V 电流 - 电源:1.5mA 工作温度:-40°C ~ 85°C 封装/外壳:16-SOIC（0.295"，7.50mm 宽） 包装:管件 供应商设备封装:16-SOIC W 安装类型:表面贴装 |
| LTC6992IS6-2-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:TimerBlox Voltage-Controlled Pulse Width Modulator (PWM) |
| LTC6992IS6-2-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:TimerBlox Voltage-Controlled Pulse Width Modulator (PWM) |
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