- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄43899 > L4990 (STMICROELECTRONICS) 1.5 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDIP16 PDF資料下載
參數(shù)資料
| 型號： | L4990 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.5 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDIP16 |
| 封裝： | DIP-16 |
| 文件頁數(shù)： | 14/24頁 |
| 文件大?。?/td> | 322K |
| 代理商： | L4990 |
L4990
D97IN511A
DC
VCC
VREF
R
START
3
12
8
4
11
Figure 40. Protection against overvol-
tage/feedback disconnection (not
latched)
D97IN512A
PGND
L4990
OPTIONAL
VREF
SGND
DIS
ISEN
I
4
14
13
12
11
RSENSE
R
2
R1
Ipk
Ipk max
2.5
RSENSE
1-
R
2
R1
Figure 41. Device shutdown on overcurrent
D97IN513
PGND
L4990
OUT
SGND
ISEN
Lp
RFF
R
VIN
RFF = 510
6
RLp
RSENSE
13
10
12
11
80
÷ 400V
DC
Figure 42. Constant power in pulse-by-pulse current limitation (flyback discontinuous)
REFERENCES
[1] Efficient active Clamp for Off-line Applications using L4990 and L6380 (N.Tricomi, G. Gattavari,
C. Adragna, PCIM96 - NURBERG).
[2] 25W Off-Line Autoranging Battery Charger with L4990 (AN889)
[3] 300W Secondary Controlled Two-Switch Forward Converter with L4990 (AN890)
[4] SMPS with L4990 for Multisync Monitors (AN891)
[5] High performance VRM using L4990A, for Pentium Pro
processor (AN908).
L4990
DC
10K
COMP
3
6
12
13
SGND
ISEN
D97IN570A
Figure 43. Voltage mode operation.
L4990 - L4990A
21/24
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L4990D | 1.5 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| L5970AD | 1.8 A SWITCHING REGULATOR, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| L5972D013TR | 3 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, PDSO8 |
| L5972D | 3 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, PDSO8 |
| L5973AD | 2.3 A SWITCHING REGULATOR, PDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L4990A | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:PRIMARY CONTROLLER |
| L4990AD | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:PRIMARY CONTROLLER |
| L4990D | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:PRIMARY CONTROLLER |
| L4991 | 功能描述:TEST COIL FOR REED SWITCH, 1PC RoHS:是 類別:開關(guān) >> 配件 系列:- 標(biāo)準(zhǔn)包裝:100 系列:- 其它名稱:886.0007886.0007-ND |
| L4992 | 制造商:STMicroelectronics 功能描述: 制造商:STMicroelectronics 功能描述:VOLT SUPERVISOR CNTRLR 5.1V/3.3V 32TQFP - Trays |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。