- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄378722 > UCC1837 (Texas Instruments, Inc.) RSO-S_D(Z) Series - Econoline Regulated DC-DC Converters; Input Voltage (Vdc): 12V; Output Voltage (Vdc): 05V; Power: 1W; 2:1 and 4:1 Wide Input Voltage Ranges; 1kVDC, 2kVD & 3kVDC Isolation; UL94V-0 Package Material; Continuous Short Circuit Protectionwith Current Foldback; Low Noise; No External Capacitor needed; Efficiency to 83% PDF資料下載
參數(shù)資料
| 型號(hào)： | UCC1837 |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | DC/DC變換器 |
| 英文描述： | RSO-S_D(Z) Series - Econoline Regulated DC-DC Converters; Input Voltage (Vdc): 12V; Output Voltage (Vdc): 05V; Power: 1W; 2:1 and 4:1 Wide Input Voltage Ranges; 1kVDC, 2kVD & 3kVDC Isolation; UL94V-0 Package Material; Continuous Short Circuit Protectionwith Current Foldback; Low Noise; No External Capacitor needed; Efficiency to 83% |
| 中文描述： | 8引腳? - FET的線性穩(wěn)壓器控制器 |
| 文件頁數(shù)： | 7/8頁 |
| 文件大?。?/td> | 87K |
| 代理商： | UCC1837 |
7
UCC1837
UCC2837
UCC3837
Practical Considerations
In order to achieve the expected performance, careful at-
tention must be paid to circuit layout. The printed circuit
board should be designed using a single point ground,
referenced to the return of the output capacitor.
traces carrying high current should be made as short and
wide as possible in order to minimize parasitic resistance
and inductance effects.
All
To illustrate the importance of these concepts, consider
the effects of a 1.5" PCB trace located between the out-
put capacitor and the UCC3837 feedback reference. A
0.07" wide trace of 1oz. copper results in an equivalent
resistance of 10.4m
. At a load current of 3A, 31.2mV is
dropped across the trace, contributing almost 1% error to
the DC regulation. Likewise, the inductance of the trace
is approximately 3.24nH, resulting in a 91mV spike dur-
ing the 100ns it takes the load current to slew from
200mA to 3A.
The dropout voltage of a linear regulator is often a key
design parameter. Calculations of the dropout voltage of
a linear regulator based on the UCC3837 Controller
should consider all of the following:
Sense resistor drop, including temperature and
tolerance effects,
Path resistance drops on both the input and output
voltages,
MOSFET resistance as a function of temperature and
gate drive, including transient performance,
Ground path drops.
APPLICATION INFORMATION
15
16
17
18
19
20
21
0
20
40
60
80
AMBIENT TEMPERATURE [°C]
4
5
6
7
8
9
RESISTANCE
SHORT CIRCUIT LIMIT
C
S
Figure 6. Copper resistance and short circuit limit
for example resistor.
UNITRODE CORPORATION
7 CONTINENTAL BLVD. MERRIMACK, NH 03054
TEL. (603) 424-2410 FAX (603) 424-3460
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UCC1839 | RSO-S_D(Z) Series - Econoline Regulated DC-DC Converters; Input Voltage (Vdc): 12V; Output Voltage (Vdc): 05V; Power: 1W; 2:1 and 4:1 Wide Input Voltage Ranges; 1kVDC, 2kVD & 3kVDC Isolation; UL94V-0 Package Material; Continuous Short Circuit Protectionwith Current Foldback; Low Noise; No External Capacitor needed; Efficiency to 83% |
| UCC18500 | BiCMOS PFC/PWM Combination Controller |
| UCC18502 | BiCMOS PFC/PWM Combination Controller |
| UCC18503 | BiCMOS PFC/PWM Combination Controller |
| UCC28502 | BiCMOS PFC/PWM Combination Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UCC1839 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Secondary Side Average Current Mode Controller |
| UCC1839J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Current/Voltage-Mode SMPS Controller |
| UCC18500 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:BiCMOS PFC/PWM Combination Controller |
| UCC18501 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:BiCMOS PFC/PWM Combination Controller |
| UCC18502 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:BiCMOS PFC/PWM Combination Controller |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。