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參數(shù)資料
| 型號(hào)： | NCP1212 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | Current Mode PWM Controller for Both Forward and Flyback Converters |
| 中文描述： | 電流模式PWM控制器正向和反激式轉(zhuǎn)換器 |
| 文件頁數(shù)： | 15/22頁 |
| 文件大?。?/td> | 200K |
| 代理商： | NCP1212 |
NCP1212
http://onsemi.com
15
Figure 39. Brownout Detect Block Diagram
1.21 V
+5 V
45 A
BOK
To Bulk Capacitor
Brownout Shutdown
R
Upper
R
Lower
+
Output
+
SW2
+
Internal 5.0 V Regulator
A low current 5.0 V regulator is available internally for
the device operation and reference voltages generation. This
voltage not accessible externally and is designed to operate
with no external bypass capacitor.
Totem Pole Output Driver
NCP1212 contains a single totem pole output stage that
was specifically designed for direct drive of power
MOSFETs. It is capable of up to 300 mA peak drive current
and has a typical rise time and fall time of 25 ns with 1.0 nF
load.
Overvoltage Protection and Under Voltage Lockout
NCP1212 starts operation once V
CC
reaches 15 V.
Overvoltage Protection (OVP) will be triggered if V
CC
exceeds 25 V and on the other hand, Under Voltage Lockout
(UVLO) will take place if V
CC
drops below 10 V. NCP1212
continues to draw 3.0 mA typical after overload or
overvoltage shutdown is triggered. If the startup resistance
connected to V
CC
pin is large enough such that V
CC
voltage
keeps on dropping after shutdown, NCP1212 will restart once
V
CC
drops below UVLO threshold. If the fault condition
persists, NCP1212 will enter hicup operation. In case system
latchoff is required in fault conditions, a smaller startup
resistance can be used to sustain the device operation.
NCP1212 will remain in shutdown mode as long as V
CC
is
maintained above UVLO threshold after fault is detected.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| NCP1212PG | Current Mode PWM Controller for Both Forward and Flyback Converters |
| NCP1212DR2 | Current Mode PWM Controller for Both Forward and Flyback Converters |
| NCP1212P | Current Mode PWM Controller for Both Forward and Flyback Converters |
| NCP1215(中文) | Low Cost Variable OFF Time Switched Mode Power Supply Controller(低成本可變關(guān)閉時(shí)間開關(guān)模式電源控制器) |
| NCP1215ADR2 | Low Cost Variable OFF Time Switched Mode Power Supply Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NCP1212/D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Current Mode PWM Controller for Both Forward and Flyback Converters |
| NCP1212_05 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Current Mode PWM Controller for Both Forward and Flyback Converters |
| NCP1212DR2 | 功能描述:電流型 PWM 控制器 High Performance RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)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(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| NCP1212DR2G | 功能描述:電流型 PWM 控制器 High Performance Current Mode PWM RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)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(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| NCP1212P | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 High Performance RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
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