TD1720 TD/泰德代理 PWM 耐压16V 20A 原厂直供 价低

TD1720允许较宽的输入电压，要么是一个5～16V或两个电源电压（s）的各种应用程序。上电复位（POR）

电路监视VCC电源电压，以防止错误的逻辑控制。一个内建的软启动电路，防止过冲以及输出电压的输入电流限制。

温度补偿内部0.8V参考电压精度高的设计，以满足低输出电压应用的要求。

General Description

The TD1720 is a voltage mode, fixed 300kHz switching

frequency, synchronous buck converter. The TD1720 allows

wide input voltage that is either a single 5~12V or two supply

voltage(s) for various applications. A power-on-reset (POR)

circuit monitors the VCC supply voltage to prevent wrong

logic controls. A builtin soft-start circuit prevents the output

voltages from overshoot as well as limits the input current.

An internal 0.8V temperature-compensated reference

voltage with high accuracy is designed to meet the

requirement of low output voltage applications. The TD1720

provides excellent output voltage regulations against load

current

variation.

The controller’s over-current protection monitors the output

current by using the voltage drop across the RDS(ON) of

low-side MOSFET, eliminating the need for a current sensing

resistor that features high efficiency and low cost. In addition,

the TD1720 also integrates excellent protection functions:

The over-voltage protection (OVP) , under- voltage protection

(UVP). OVP circuit which monitors the FB voltage to prevent

the PWM output from overvoltage,and UVP circuit which

monitors the FB voltage to prevent the PWM output from

under-voltage or short-circuit.The TD1720 is available in

SOP-8P and TDFN3x3-10 packages.

Features

 Wide 5V to 12V Supply Voltage

 Power-On-Reset Monitoring on VCC

 Excellent Output Voltage Regulations 0.8V Internal

Reference ±1% Over-Temperature Range

 Integrated Soft-Start

 Voltage Mode PWM Operation with External

Compensation

 Up to 90% Duty Ratio for Fast Transient Response

 Constant Switching Frequency 300kHz ±10%

 Drive Dual Low Cost N-MOSFETs with Adaptive

Dead-Time Control

 50% Under-Voltage Protection

 125% Over-Voltage Protection

 Adjustable Over-Current Protection Threshold Using the

RDS(ON) of Low-Side MOSFET

 Shutdown Control by COMP

 Power Good Monitoring (TDFN-10 3mmx3mm Package

Only)

 SOP-8P and TDFN3x3-10 Packages

 Lead Free and Green Devices Available (RoHS Compliant)

Applications

 Graphic Cards

 DSL, Switch HUB

 Wireless Lan

 Notebook Computer

 Mother Board

 LCD Monitor/TV

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