- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373347 > S3842 (AUK Corp) Current Mode PWM Controller PDF資料下載
參數(shù)資料
| 型號： | S3842 |
| 廠商： | AUK Corp |
| 英文描述： | Current Mode PWM Controller |
| 中文描述： | 電流模式PWM控制器 |
| 文件頁數(shù)： | 5/8頁 |
| 文件大?。?/td> | 351K |
| 代理商： | S3842 |
KSI-8006-003
5
2. Oscillator Waveforms and Maximum Duty Cycle
The oscillator frequency is programmed by the values
selected for the timing components Rt and Ct. Ct is
LARGE Rt
SMALL Ct
charged from 5V, Vref, through resistor Rt
to
approximately 2.8V and discharged to 1.2V by an
Rt
internal current sink.
LARGE Ct
During the discharge of Ct, the oscillator generates an
internal blanking pulse and the center input NOR gate high.
5
This makes output to be in a low state and control the
amount of output dead time.
CLOCK
3. Error AMP Configuration
Error amp output(Pin1) is provided for external loop
Compensation and error amp can source or sink up to 0.5mA.
The non-inverting input is internally biased at 2.5V and is
not pinned out. The converter output voltage is typically
divided down and monitored by the inverting input(pin2).
4. Current Sense Circuit
A normal operating conditions occurs when the power supply output is overloaded or if output voltage to 1.0V
Therefore the maximum peak switch current is lpk(max)=1.0V/R
s
, and under the normal operating conditions the
peak inductor current controlled by the voltage at pin1.
S3842
COMP
AMP
ERROR
1
3
5
GND
SENSE
Rs
R
C
2R
R
IV
CURRENT
Iβ
Ipeak =
R(Vpin1 - 2Vbe)
3R x Rs
1
Zf
2.50V
COMP
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| S3843P | Current Mode PWM Controller |
| S3843 | Current Mode PWM Controller |
| S3882P | Current Mode PWM Controller |
| S3882 | Current Mode PWM Controller |
| S3884 | Si APD Low bias operation, for 800 nm band |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| S3842P | 制造商:AUK 制造商全稱:AUK corp 功能描述:Current Mode PWM Controller |
| S3843 | 制造商:AUK 制造商全稱:AUK corp 功能描述:Current Mode PWM Controller |
| S3843P | 制造商:AUK 制造商全稱:AUK corp 功能描述:Current Mode PWM Controller |
| S3850G2N | 制造商:TYAN 功能描述:ATX, PCI, GFX, (2) LAN - Bulk |
| S3850G2NR | 制造商:TYAN 功能描述:ATX, PCI, GFX, (2) LAN, RAID - Bulk |
發(fā)布緊急采購，3分鐘左右您將得到回復。