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參數(shù)資料
| 型號： | V62/05616-01XE |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2.2 A SWITCHING CONTROLLER, 1150 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | GREEN, PLASTIC, SOIC-16 |
| 文件頁數(shù)： | 19/21頁 |
| 文件大?。?/td> | 447K |
| 代理商： | V62/05616-01XE |
R
T +
3 V
(10 mA)
1 * DMAX
C
T +
1.6
D
MAX
R
T
f
(1)
UDG95102
R
C
CT
RT
IR
3 V
ICIR
CLK
ID = 10 mA
LEB
VTH
1 k
10 k
70
75
80
85
90
95
100
100 k
D
M
A
X
Maximum
Duty
Cycle
%
RT Timing Resistance W
MAXIMUM DUTY CYCLE
vs
TIMING RESISTANCE
10 M
1 M
100 k
10 k
1 k
10 k
100 k
RT Timing Resistance W
OSCILLATOR FREQUENCY
vs
TIMING RESISTANCE
f
Frequency
Hz
www.ti.com
SGLS305D – JULY 2005 – REVISED SEPTEMBER 2010
APPLICATION INFORMATION
The oscillator of the UC2825A-EP is a sawtooth. The rising edge is governed by a current controlled by the RT
pin and value of capacitance at the CT pin (CCT). The falling edge of the sawtooth sets dead time for the outputs.
Selection of RT should be done first, based on desired maximum duty cycle. CT then can be chosen, based on
the desired frequency (RT) and DMAX. The design equations are:
Recommended values for RT range from 1 k to 100 k. Control of DMAX less than 70% is not recommended.
Figure 1. Oscillator
Figure 2.
Figure 3.
Copyright 2005–2010, Texas Instruments Incorporated
7
Product Folder Link(s): UC2825A-EP
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