- 您现在的位置：买卖IC网 > PDF目录1820 > LM3495MTCX/NOPB (National Semiconductor)IC REG BUCK SYNC ADJ 10A 16TSSOP PDF资料下载
参数资料
| 型号： | LM3495MTCX/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 26/36页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 10A 16TSSOP |
| 标准包装： | 1 |
| 系列： | PowerWise® |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.6 V ~ 5.5 V |
| 输入电压： | 2.9 V ~ 18 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 200kHz ~ 1.5MHz |
| 电流 - 输出： | 10A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm 宽） |
| 包装： | 标准包装 |
| 供应商设备封装： | 16-TSSOP |
| 产品目录页面： | 1300 (CN2011-ZH PDF) |
| 配用： | LM3495EVAL-ND - BOARD EVALUATION LM3495 |
| 其它名称： | LM3495MTCXDKR |
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页第18页第19页第20页第21页第22页第23页第24页第25页当前第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
SNVS410F – FEBRUARY 2006 – REVISED APRIL 2013
60
40
20
0
-20
-40
-60
-60
-80
-100
-120
-140
-160
-180
100
1k
10k
100k
1M
100
1k
10k
100k
1M
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 39. Overall Loop Gain and Phase
The bandwidth of this example circuit is 49 kHz, with a phase margin of 46°.
Efficiency Calculations
A reasonable estimation for the efficiency, η , of a buck regulator controlled by the LM3495 can be obtained by
adding together the loss in each current carrying element, P TOTAL-LOSS , and using the equation:
P O
K =
P O + P TOTAL-LOSS
(36)
The following shows an efficiency calculation to complement the Typical Application Circuit . Output power for this
circuit is P O = 1.2V x 10A = 12W. Input voltage is assumed to be 12V, and the calculations used assume that the
converter runs in CCM.
Chip Operating Loss
This term accounts for the current drawn at the VIN pin. This current, I IN , drives the logic circuitry and the power
FETs. The gate driving loss term from the power FET section of Design Considerations is included in the chip
operating loss. For the LM3495, I IN is equal to the steady state operating current, I Q , plus the FET driving current,
I GC . Power is lost as this I IN passes through the internal linear regulator of the LM3495.
I GC = (Q G-HI + Q G-LO ) x f OSC
I GC = (11nC + 33nC) x 500 kHz = 22 mA
I Q is typically 1.8 mA, taken from the Electrical Characteristics table. Chip Operating Loss is then:
P Q = V IN x (I Q + I GC )
P Q = 12V x (1.8mA + 22mA) = 0.29W
High-Side FET Switching Loss
P SW = 0.5 x V IN x I O x (t R + t F ) x f SW
P SW = 0.5 x 12V x 10A x (5 ns + 8 ns) x 500 kHz = 0.39W
FET Conduction Loss
P C = D (I 2O x R DSON-HI x 1.3)
P C-HI = 0.1 x (100 x 0.013) = 0.13W
P C = (1 - D) (I 2O x R DSON-LO x 1.3)
P C-LO = 0.9 x (100 x 0.0044) = 0.40W
R SNS Loss (if used)
P SNS = (1 - D) ((I O ) 2 x R SNS )
Not used in this example.
(37)
(38)
(39)
(40)
(41)
(42)
(43)
(44)
(45)
(46)
(47)
26
Product Folder Links: LM3495
Copyright ? 2006–2013, Texas Instruments Incorporated
相关PDF资料 |
PDF描述 |
|---|---|
| LM350T | IC REG LDO ADJ 3A TO220AB |
| LM350T | IC REG LDO ADJ 3A TO220-3 |
| LM3686TLE-AAED/NOPB | IC REG BUCK SYNC .9A TRPL 12USMD |
| LM399AH | IC VREF SHUNT PREC 6.95V TO-46-4 |
| LM4040A25IDBZT | IC VREF SHUNT PREC 2.5V SOT23-3 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM3497M/NOPB | 制造商:Texas Instruments 功能描述:IC LED DRIVER 制造商:Texas Instruments 功能描述:POWER REGULATOR/CONTROLLER IC |
| LM3497MM/NOPB | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| LM3497MMX/NOPB | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| LM3497MX/NOPB | 制造商:Texas Instruments 功能描述:IC LED DRIVER 制造商:Texas Instruments 功能描述:POWER REGULATOR/CONTROLLER IC |
| LM349J | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Voltage-Feedback Operational Amplifier |
发布紧急采购，3分钟左右您将得到回复。