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参数资料
| 型号： | LM5041BSDX |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 685 kHz SWITCHING FREQ-MAX, DSO16 |
| 封装： | 5 X 5 MM, LLP-16 |
| 文件页数： | 1/16页 |
| 文件大小： | 426K |
| 代理商： | LM5041BSDX |
LM5041B
May 1, 2009
Cascaded PWM Controller
General Description
The LM5041B PWM controller contains all of the features
necessary to implement either current-fed or voltage-fed
push-pull or bridge power converters. These “Cascaded”
topologies are well suited for multiple output and higher power
applications. The LM5041B includes these four control out-
puts: the buck stage controls (HD and LD) and the push-pull
control outputs (PUSH and PULL). Push-pull outputs are driv-
en at 50% nominal duty cycle at one half of the switching
frequency of the buck stage and can be configured for either
a guaranteed overlap time (for current-fed applications) or a
guaranteed non-overlap time (for voltage-fed applications).
Push-pull stage MOSFETs can be driven directly from the in-
ternal gate drivers while the buck stage requires an external
driver such as the LM5102. The LM5041B includes a high-
voltage start-up regulator that operates over a wide input
range of 15V to 100V. The PWM controller is designed for
high-speed capability including an oscillator frequency range
up to 1 MHz and total propagation delays of less than 100 ns.
Additional features include line Under-Voltage Lock-Out
(UVLO), Soft-Start, an error amplifier, precision voltage ref-
erence, and thermal shutdown.
The differences between LM5041, LM5041A and LM5041B
are as follows: In the LM5041A and the LM5041B version, the
hiccup mode over-current protection is not employed and the
VCC bias regulator is not disabled by a low state at the SS
pin. In the LM5041B version, both the high and low side buck
stage gate drivers are forced to a low state when the controller
is disabled. In the LM5041 and the LM5041B version, the
buck stage controller is disabled by either a low state at the
UVLO pin or a low state at the SS pin. Also in the LM5041B
version, the REF pin 5V regulator is not disabled by a UVLO
pin low state.
Features
■ Internal Start-up Bias Regulator
■ Programmable Line Under-Voltage Lockout (UVLO) with
Adjustable Hysteresis
■ Current Mode Control
■ Internal Error Amplifier with Reference
■ Cycle-by-cycle Over-Current Protection
■ Leading Edge Blanking
■ Programmable Push-Pull Overlap or Dead Time
■ Internal 1.5A Push-Pull Gate Drivers
■ Programmable Soft-Start
■ Programmable Oscillator with Sync Capability
■ Precision Reference
■ Thermal Shutdown
Applications
■ Telecommunication Power Converters
■ Industrial Power Converters
■ Multi-Output Power Converters
Packages
■ TSSOP-16
■ LLP-16 (5x5 mm) Thermally Enhanced
Typical Application Circuit
30086401
Simplified Cascaded Push-Pull Power Converter
2009 National Semiconductor Corporation
300864
www.national.com
LM5041B
Cascaded
PWM
Controller
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM5041EVAL | 功能描述:BOARD EVALUATION LM5041 RoHS:否 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:PowerWise® 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| LM5041EVAL/NOPB | 功能描述:电源管理IC开发工具 LM5041 EVAL BOARD RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| LM5041MTC | 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 |
| LM5041MTC | 制造商:Texas Instruments 功能描述:PWM CONTROLLER POWERWISE TSSOP16 |
| LM5041MTC/NOPB | 功能描述:电流型 PWM 控制器 Cascaded 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 |
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