- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄371431 > 2845B (Texas Instruments, Inc.) HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS PDF資料下載
參數(shù)資料
| 型號(hào)： | 2845B |
| 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)： | 13/21頁 |
| 文件大小： | 336K |
| 代理商： | 2845B |
www.ti.com
Shutdown Technique
The PWM controller (see
Figure 5
) can be shut down by two methods: either raise the voltage at I
SENSE
above
1 V or pull the COMP terminal below a voltage two diode drops above ground. Either method causes the output
of the PWM comparator to be high (refer to block diagram). The PWM latch is reset dominant so that the output
remains low until the next clock cycle after the shutdown condition at the COMP or I
SENSE
terminal is removed.
In one example, an externally latched shutdown can be accomplished by adding an SCR that resets by cycling
V
CC
below the lower UVLO threshold. At this point, the reference turns off, allowing the SCR to reset.
330
1 k
500
To Current-Sense
Resistor
Shutdown
Shutdown
COMP
V
REF
I
SENSE
R
T
0.1
μ
F
C
T
R1
R2
I
SENSE
R
SENSE
C
V
REF
R
T
/C
T
I
SENSE
TL284xB, TL384xB
HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS
SLVS610A–AUGUST 2006–REVISED SEPTEMBER 2006
APPLICATION INFORMATION (continued)
Figure 5. Shutdown Techniques
A fraction of the oscillator ramp can be summed resistively with the current-sense signal to provide slope
compensation for converters requiring duty cycles over 50% (see
Figure 6
). Note that capacitor C forms a filter
with R2 to suppress the leading-edge switch spikes.
Figure 6. Slope Compensation
13
Submit Documentation Feedback
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 2843 | SICHTSCHEIBE KLASSE 1 METEOR 1900 |
| 2844 | SICHTSCHEIBE KLASSE 2 METEOR 1900 |
| 28472-16 | Protocol Controller |
| 28472-17 | Protocol Controller |
| 28474-16 | Protocol Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 2846 | 制造商:Farnell / Duratool 功能描述:VINYL CARD HOLDERS FOR MODULAR TOTE BOXES; For Use With:Modular Tote Boxes; Accessory Type:Vinyl Card Holder; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No; External Height:2.25"; External Width:6.5" ;RoHS Compliant: No |
| 2846.0 | 制造商:ALTECH CORP 功能描述:FERRULE; POLYPROPYLENE (SLEEVE) , TIN PLATED COPPER (TUBE); 0.19 IN.; 0.10 IN 制造商:ALTECH CORP 功能描述:Ferrule; Polypropylene (Sleeve) , Tin Plated Copper (Tube); 0.19 in.; 0.10 in. |
| 2846.0/100 | 功能描述:端子 H2.50/12-D Din Std Insul Ferrule BLU 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 |
| 284-601 | 制造商:WAGO Innovative Connections 功能描述:TERMINAL BLOCK DIN RAIL 2POS 24-8AWG 制造商:WAGO 功能描述:TERMINAL BLOCK, DIN RAIL, 2POS, 24-8AWG 制造商:WAGO Innovative Connections 功能描述:TERMINAL BLOCK, DIN RAIL, 2POS, 24-8AWG; Connector Type:DIN Terminal Block; Series:-; Connector Mounting:DIN Rail; Approvals / Standards:(Not Available); No. of Contacts:2; Wire Size AWG Min:24AWG; Wire Size AWG Max:8AWG ;RoHS Compliant: Yes |
| 284-604 | 制造商:WAGO Innovative Connections 功能描述:RL MTD TRM BLK 2CON FRONT ENTRY BL |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。