Datasheet > LM5025C

LM5025C

更新时间： 2024-11-24 02:58:51

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LM5025C Active Clamp Voltage Mode PWM Controller

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LM5025C 数据手册

LM5025C

www.ti.com

SNVS568C –SEPTEMBER 2008–REVISED MARCH 2013

LM5025C Active Clamp Voltage Mode PWM Controller

Check for Samples: LM5025C

FEATURES

DESCRIPTION

The LM5025C is a functional variant of the LM5025

active clamp PWM controller. The functional

differences of the LM5025C are: The maximum duty

cycle of the LM5025C is increased from 80% to 91%.

The soft-start capacitor charging current is increased

from 20 µA to 90 µA. The V_CCregulator current limit

threshold is increased from 25 mA to 55 mA. The

CS1 and CS2 current limit thresholds have been

increased to 0.5V. The internal CS2 filter discharge

device has been disabled and no longer operates

each clock cycle. The internal V_CCand V_REF

regulators continue to operate when the line UVLO

pin is below threshold.

•

Internal Start-Up Bias Regulator

3A Compound Main Gate Driver

Programmable Line Under-Voltage Lockout

(UVLO) with Adjustable Hysteresis

•

Voltage Mode Control with Feed-Forward

Adjustable Dual Mode Over-Current Protection

Programmable Overlap or Deadtime between

the Main and Active Clamp Outputs

•

Volt x Second Clamp

Programmable Soft-start

Leading Edge Blanking

The LM5025C PWM controller contains all of the

features necessary to implement power converters

utilizing the Active Clamp / Reset technique. With the

active clamp technique, higher efficiencies and

greater power densities can be realized compared to

conventional catch winding or RDC clamp / reset

techniques. Two control outputs are provided, the

main power switch control (OUT_A) and the active

clamp switch control (OUT_B). The two internal

compound gate drivers parallel both MOS and Bipolar

devices, providing superior gate drive characteristics.

This controller is designed for high-speed operation

including an oscillator frequency range up to 1MHz

and total PWM and current sense propagation delays

less than 100 ns. The LM5025C includes a high-

voltage start-up regulator that operates over a wide

input range of 13V to 90V. Additional features

include: Line Under Voltage Lockout (UVLO),

softstart, oscillator UP/DOWN sync capability,

precision reference and thermal shutdown.

Single Resistor Programmable Oscillator

Oscillator UP / DOWN Sync Capability

Precision 5V Reference

Thermal Shutdown

PACKAGE

•

TSSOP-16

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.

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.

12 3 4 5 6 7...22

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LM5025C 替代型号

型号	品牌	替代类型	描述	数据表
LM5025B	TI	功能相似	具有 P 或 N 沟道钳位 FET 和 75% 最大占空比的 90V 有源钳位电压模式 P
LM5025A	TI	功能相似	具有 P 或 N 沟道钳位 FET 和 0.5V CS 阈值的 90V 有源钳位电压模式

与LM5025C相关器件

型号	品牌	获取价格	描述	数据表
LM5025C_15	TI	获取价格	LM5025C Active Clamp Voltage Mode PWM Controller
LM5025CCMTE	NSC	获取价格	Active Clamp Voltage Mode PWM Controller
LM5025CMTC	NSC	获取价格	Active Clamp Voltage Mode PWM Controller
LM5025CMTC/NOPB	TI	获取价格	LM5025C Active Clamp Voltage Mode PWM Controller
LM5025CMTCE/NOPB	TI	获取价格	LM5025C Active Clamp Voltage Mode PWM Controller
LM5025CMTCX	NSC	获取价格	Active Clamp Voltage Mode PWM Controller
LM5025CMTCX/NOPB	TI	获取价格	LM5025C Active Clamp Voltage Mode PWM Controller
LM5025DMTC/NOPB	TI	获取价格	Active Clamp Voltage Mode PWM Controller 16-TSSOP -40 to 125
LM5025MTC	NSC	获取价格	Active Clamp Voltage Mode PWM Controller
LM5025MTC/NOPB	NSC	获取价格	IC SWITCHING CONTROLLER, 660 kHz SWITCHING FREQ-MAX, PDSO16, TSSOP-16, Switching Regulator

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