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参数资料
| 型号： | LM5020MM-1/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 2/17页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR PWM CM 10-MSOP |
| 标准包装： | 1 |
| 系列： | PowerWise® |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1MHz |
| 占空比： | 85% |
| 电源电压： | 13 V ~ 90 V |
| 降压： | 是 |
| 升压： | 是 |
| 回扫： | 是 |
| 反相： | 是 |
| 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： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 包装： | 标准包装 |
| 产品目录页面： | 1297 (CN2011-ZH PDF) |
| 配用： | LM5020EVAL-ND - EVALUATION BOARD FOR LM5020 |
| 其它名称： | LM5020MM-1DKR |
SNVS275F – MAY 2004 – REVISED APRIL 2006
Connection Diagram
Top View
VIN
FB
1
2
10
9
SS
RT/SYNC
COMP
VCC
3
4
8
7
CS
UVLO
OUT
5
6
GND
Figure 2. 10-Lead VSSOP, WSON
PIN DESCRIPTIONS
Pin
1
2
Name
VIN
FB
Description
Source Input Voltage
Feedback Signal
Application Information
Input to the start-up regulator. Input range is 13V to 100V.
Inverting input of the internal error amplifier. The non-
inverting input is internally connected to a 1.25V reference.
3
4
COMP
VCC
The output of the error amplifier and input to the
Pulse Width Modulator
Output of the internal high voltage series pass
regulator. Regulated output voltage is 7.7V
COMP pull-up is provided by an internal 5K resistor which
may be used to bias an opto-coupler transistor.
If an auxiliary winding raises the voltage on this pin above
the regulation set point, the internal series pass regulator
will shut down, reducing the internal power dissipation.
5
6
7
OUT
GND
UVLO
Output of the PWM controller
Ground return
Line Under-Voltage Shutdown
Gate driver output with a 1A peak current capability.
An external resistor divider from the power converter
source voltage sets the shutdown levels. The threshold at
this pin is 1.25V. Hysteresis is set by a switched internal
20μA current source.
8
CS
Current Sense input
Current sense input for current mode control and over-
current protection. Current limiting is accomplished using a
dedicated current sense comparator. If the CS pin voltage
exceeds 0.5V the OUT pin switches low for cycle-by-cycle
current limiting. CS is held low for 50ns after OUT switches
high to blank leading edge current spikes.
9
RT / SYNC
Oscillator timing resistor pin and synchronization
input
An external resistor connected from RT to GND sets the
oscillator frequency. This pin also accepts synchronization
pulses from an external clock.
10
SS
Softstart Input
An external capacitor and an internal 10μA current source
set the soft-start ramp rate.
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
2
Product Folder Links: LM5020
Copyright ? 2004–2006, Texas Instruments Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM5020MM-2 | 功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| LM5020MM-2/NOPB | 功能描述:电流型 PWM 控制器 100V Current Mode PWM Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| LM5020MMX-1 | 功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| LM5020MMX-1/NOPB | 功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| LM5020MMX1-NOPB | 制造商:TI 制造商全称:Texas Instruments 功能描述:Internal Start-up Bias Regulator, Error Amplifier |
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