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| 型号： | LM5020SD-2/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 1/17页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST FLYBK INV 10LLP |
| 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： | 50% |
| 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-WDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 其它名称： | LM5020SD-2DKR |
SNVS275F – MAY 2004 – REVISED APRIL 2006
LM5020 100V Current Mode PWM Controller
Check for Samples: LM5020
1
FEATURES
PACKAGES
2
?
Internal Start-up Bias Regulator
?
VSSOP-10
?
Error Amplifier
?
WSON-10 (4 mm x 4 mm)
?
?
?
?
?
?
?
?
?
?
Precision Voltage Reference
Programmable Softstart
1A Peak Gate Driver
Maximum Duty Cycle Limiting (80% for
LM5020-1 or 50% for LM5020-2)
Programmable Line Under Voltage Lockout
(UVLO) with Adjustable Hysteresis
Cycle-by-Cycle Over-Current Protection
Slope Compensation (LM5020-1)
Programmable Oscillator Frequency with
Synchronization Capability
Current Sense Leading Edge Blanking
Thermal Shutdown Protection
DESCRIPTION
The LM5020 high voltage pulse-width-modulation
(PWM) controller contains all of the features needed
to implement single ended primary power converter
topologies. Output voltage regulation is based on
current-mode control, which eases the design of loop
compensation while providing inherent line feed-
forward. The LM5020 includes a high-voltage start-up
regulator that operates over a wide input range up to
100V. The PWM controller is designed for high speed
capability including an oscillator frequency range to
1MHz and total propagation delays less than 100ns.
Additional features include an error amplifier,
precision reference, line under-voltage lockout, cycle-
by-cycle current limit, slope compensation, softstart,
oscillator synchronization capability and thermal
APPLICATIONS
? Telecommunication Power Converters
shutdown. The controller is available in both VSSOP-
10 and WSON-10 packages.
?
?
Industrial Power Converters
+42V Automotive Systems
Typical Application Circuit
V IN
VIN
VCC
V OUT
LM5020
UVLO
SS
OUT
CS
RT / SYNC
FB
GND
COMP
COMPENSATION
Figure 1. Non-Isolated Flyback Converter
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright ? 2004–2006, Texas Instruments Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM5020SDX-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 |
| LM5020SDX-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 |
| LM5020SDX-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 |
| LM5020SDX-2/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 |
| LM5021 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:AC-DC Current Mode PWM Controller |
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