參數(shù)資料
型號(hào)： 2844B
廠商： Texas Instruments, Inc.
英文描述： HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS
中文描述： 高性能的電流模式PWM控制器
文件頁數(shù)： 11/21頁
文件大?。?/td> 336K
代理商： 2844B
www.ti.com
APPLICATION INFORMATION
Z
i
Z
f
VFB
COMP
2.5 V
0.5 mA
Error
Amplifier
+
R
S
C
f
R
f
Error
Amplifier
2R
R
1 V
Current-Sense
Comparator
I
S
(see Note A)
+
I
SENSE
COMP
GND
C
T
R
T
V
REF
R
T
/C
T
GND
TL284xB, TL384xB
HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS
SLVS610A–AUGUST 2006–REVISED SEPTEMBER 2006
The error-amplifier configuation circuit is shown in
Figure 1
.
A.
Error amplifier can source or sink up to 0.5 mA.
Figure 1. Error-Amplifier Configuration
The current-sense circuit is shown in
Figure 2
.
A.
B.
Peak current (I
S
) is determined by the formula: I
S(max)
= 1 V/R
S
A small RC filter formed by resistor R
f
and capacitor C
f
may be required to suppress switch transients.
Figure 2. Current-Sense Circuit
The oscillator frequency is set using the circuit shown in
Figure 3
. The frequency is calculated as:
f = 1 / R
T
C
T
For R
T
> 5 k
:
f
≈
1.72 / R
T
C
T
Figure 3. Oscillator Section
11
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2844D 制造商:Excelta Corporation 功能描述:Plier - Chain Nose - Two Star 5" Stainless Steel w/serrated jaws
2844D/PASS GRIPS 制造商:Excelta Corporation 功能描述:PLIERS, SERRATED EDGE, POLISHED STAINLESS STEEL, PASS GRIPS
2845 制造商:Olympic Wire & Cable Corp 功能描述:Cable; 25 Cond; 24 AWG; 7x32; TC + TC Drain; Overall Shld; 300 V; 0.37?? OD; VW-1 制造商:Farnell / Duratool 功能描述:LONG DIVIDERS; For Use With:Static Protection Modular Tote Box 2826; Accessory Type:Long Divider ;RoHS Compliant: Yes 制造商:3M Electronic Products Division 功能描述:Saf Spectacles, 3M, 2845, solder
2845.0/100 功能描述:端子 H2.50/8-D, DIN STD INSUL BLUE RoHS:否 制造商:AVX 產(chǎn)品:Junction Box - Wire to Wire 系列:9826 線規(guī):26-18 接線柱/接頭大小: 絕緣: 顏色:Red 型式:Female 觸點(diǎn)電鍍:Tin over Nickel 觸點(diǎn)材料:Beryllium Copper, Phosphor Bronze 端接類型:Crimp
2845/19 BK001 功能描述:連接線 22AWG 19/34 PTFE 1000ft SPOOL BLACK RoHS:否 制造商:Belden Wire & Cable 絞合:19 x 32 電壓額定值:1 kV 長度:1000 ft 線規(guī) - 美國線規(guī)（AWG）:20 絕緣材料:Tetraflouroethylene (TFE) 最大溫度:+ 200 C 類型:High Temperature, High Voltage 外殼顏色:Blue (Light) 系列:83027
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