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دیتاشیت - Techcode - Single Buck Voltage Mode PWM Controller

شماره قطعه TD1722
شرح مفصل Single Buck Voltage Mode PWM Controller
تولید کننده Techcode 
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TD1722 شرح
Techcode®
Single Buck Voltage Mode PWM Controller
DATASHEET
TD1722
General Description
Features
The TD1722 is a voltage mode, fixed 200kHz/300kHz/600kHz Wide 5V to 12V Supply Voltage
switching frequency, synchronous buck converter. The APW Power-On-Reset Monitoring on VCC
8722 allows wide input voltage that is either a single 5~1 Excellent Output Voltage Regulations
2V or two supply voltage(s) for various applications. A 0.6V Internal Reference for TD1722/A/D
power-on-reset (POR) circuit monitors the VCC supply voltage 0.8V Internal Reference for TD1722B/C
to prevent wrong logic controls.
±0.6% Over-Temperature Range
A built- in soft-start circuit prevents the output voltages from Integrated Soft-Start
over- shoot as well as limits the input current. An internal
Voltage Mode PWM Operation with External
0.6V/0.8V Temperature-compensated reference voltage
Compensation
with high accuracy is designed to meet the requirement of Up to 90%DutyRatio for Fast Transient Response
low out- put voltage applications. The APW8722 provides Constant Switching Frequency
excel- lent output voltage regulations against load
300kHz ±10% for TD1722/B
current variation. The controllers over-current protection 200kHz ±10% for TD1722C
monitors the out- put current by using the voltage drop 600kHz ±10% for TD1722A/D
across the RDS (ON) of low-side MOSFET, eliminating the
Integrated Bootstrap Forward P-CH MOSFET
need for a cur- rent sensing resistor that features high
50%Under-Voltage Protection
efficiency and low cost. In addition, the TD1722 also
125%Over-Voltage Protection
integrates excel- lent protection functions. The over-voltage Adjustable Over-Current Protection Threshold
protection (OVP), under-voltage protection (UVP). OVP circuit Using the RDS(ON) of Low-Side MOSFET
which monitors the FB voltage to prevent the PWM output Shutdown Control byCOMP
from over voltage, and UVP circuit which monitors the FB
SOP-8P Package
voltage to prevent the PWM output from under voltage or Lead Free and Green Devices Available
short circuit.The TD1722 is available in SOP-8P packages
Applications
Graphic Cards
DSL, Switch HUB
Wireless Lan
Notebook Computer
Mother Board
LCD Monitor/TV
December, 20, 2011
America Techcode Semiconductor, Inc.
1
www.techcodesemi.com

قانون اساسیصفحه 19
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