參數(shù)資料
型號(hào): TOP243G-TL
英文描述: SMPS Controller
中文描述: 開(kāi)關(guān)電源控制器
文件頁(yè)數(shù): 10/52頁(yè)
文件大?。?/td> 457K
代理商: TOP243G-TL
TOP242-250
10
H
9/02
General Information & Table of Contents
Product Selector Guide 1
Data Sheets 2
Application Notes 3
Design Ideas 4
Design Tools 5
Quality and Reliability 6
Package Information 7
DPA-SwitchDC-DC Seminar 8
LinkSwitch & TinySwitch-IIAC-DC Seminar 9
TOPSwitch-GXAC-DC Seminar 10
Sales Representatives and Distributors 11
is also used to generate a temperature-compensated current
reference which is trimmed to accurately set the switching
frequency, MOSFET gate drive current, current limit, and the
line OV/UV thresholds.
TOPSwitch-GX
has improved circuitry
to maintain all of the above critical parameters within very tight
absolute and temperature tolerances.
High-Voltage Bias Current Source
This current source biases
TOPSwitch-GX
from the DRAIN
pin and charges the CONTROL pin external capacitance
during start-up or hysteretic operation. Hysteretic operation
occurs during auto-restart, remote off and over-temperature
shutdown. In this mode of operation, the current source is
switched on and off with an effective duty cycle of approxi-
mately 35%. This duty cycle is determined by the ratio of
CONTROL pin charge (I
) and discharge currents (I
and
I
). This current source is turned off during normal
operation when the output MOSFET is switching. The effect
of the current source switching will be seen on the DRAIN
voltage waveform as small disturbances and is normal.
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