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參數資料
| 型號： | NCP1381 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | Low−Standby High Performance PWM Controller |
| 文件頁數： | 11/26頁 |
| 文件大小： | 559K |
| 代理商： | NCP1381 |
NCP1381
http://onsemi.com
11
Figure 9.
I
nternal QR Architecture
+
V
DD
+
Fault
+
+
V
DD
+
+
V
DD
2
+
+
Demag
DRV
45 mV
Prioritary
Reset
R
S
Q
Q
CLK
D
V
DD
One
Shot
DRV
R
S
Q
Q
CLK
D
DRV
Skip
Reset Reset
I
3 s
Blanking
1.00
1.00
3.00
5.00
7.00
Figure 10. Core Reset Detection is Done Through the
Monitoring of a Dedicated Auxiliary Winding
0 V
45 mV
Possible
Restart
D
Skipping Cycle Mode
The NCP1381 automatically skips switching cycles when
the output power demand drops below a given level. This is
accomplished by monitoring the FB pin. In normal
operation, pin 6 imposes a peak current accordingly to the
load value. If the load demand decreases, the internal loop
asks for less peak current. When this setpoint reaches a
determined level, the IC prevents the current from
decreasing further down and starts to blank the output
pulses: the IC enters the socalled skip cycle mode, also
named controlled burst operation. The power transfer now
depends upon the width of the pulse bunches (Figure 11) and
follows the following formula:
1
2
with
L
P
= Primary Inductance
F
sw
= Switching Frequency Within the Burst
I
P
= Peak Current at which Skip Cycle Occurs
D
burst
= Burst Width/Burst Recurrence
LP
IP
2
Fsw
Dburst
(eq. 1)
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相關代理商/技術參數 |
參數描述 |
|---|---|
| NCP1381 AM90 WAF | 制造商:ON Semiconductor 功能描述: |
| NCP1381ADAPEVB | 功能描述:BOARD EVAL NCP1381 RoHS:是 類別:編程器，開發系統 >> 評估演示板和套件 系列:* 標準包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板 |
| NCP1381DR2G | 功能描述:電流型 PWM 控制器 ANA PWM CONTROLLER RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| NCP1382DR2G | 功能描述:電流型 PWM 控制器 L-STNDBY PWM CNTRLR RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| NCP1392B | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:High-Voltage Half-Bridge Driver with Inbuilt Oscillator |
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