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(yè)數(shù)： 4/22頁(yè)
文件大?。?/td> 200K
代理商： NCP1212
NCP1212
http://onsemi.com
4
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1
FB
Feedback Input
This pin detects voltage feedback from output, can be connected directly to the
optocoupler collector pin.
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PIN FUNCTION DESCRIPTION
Pin
á
Name
Function
Description
2
BOK
Brownout Detect
with Hysteresis
This is the inverting input of the brownout detect comparator. The brownout detect
comparator has a detect threshold voltage of 1.21 V. This pin senses the voltage of the
bulk capacitor through a resistor divider network to determine the brownout event. The
hysteresis band is provided by a 45 A current flows out of this pin to the resistor
network.
3
CS
Current Sense Input
During output on–time of the power switch, this pin receives a voltage proportional to
power switch current set by the current sensing resistor. The information is utilized to
terminate output switch conduction by PWM action or overcurrent limit circuitry.
4
CT
Programmed Oscillator
Frequency
Connecting a capacitor from CT pin to ground programs the internal oscillator frequency.
The oscillator can operate up to 200 kHz.
5
GND
IC Ground
6
DRV
Gate Driver Output
This is a high current totem pole output. The PWM driving control is provided by this pin.
The current and slew rate capability of this pin are suitable to drive a Power MOSFET.
7
VCC
Positive Supply to IC
This pin is the positive supply of the IC. The driver output gets disabled when the voltage
becomes higher than 25 V and the operating range is between 10 V and 25 V. The
startup voltage is set at 15 V.
8
SS/DMAX
SoftStart Time
Programming and
Maximum Duty Cycle
Selection
This is a multifunction pin. Softstart effect is provided during startup with a capacitor
connected to this pin. After softstart period elapsed, the capacitor is used for timing
control to determine output overload. If only a capacitor is connected to this pin, its final
voltage is
4.3 V and maximum turnon duty cycle DMAX is set at 82%. Connect a
resistor in parallel with the capacitor can alter the final voltage of this pin. 48% DMAX is
selected if this pin stays at 2.1 V to 2.8 V after softstart period.
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Input/Output Pins (Pins 1, 2, 3, 4, 8)
V
IO
0.3, 6.5
V
Gate Driver Output Pin (Pin 6)
V
DRV
0.3, 14
V
Power Dissipation and Thermal Characteristics
Thermal Resistance, JunctiontoAir, PDIP8 Version
Thermal Resistance, JunctiontoAir, SOIC8 Version
R
JA
100
178
°
C/W
Output Current, Source or Sink
I
DRV
1.0
A
Operating Junction Temperature Range
T
J
40 to +150
°
C
Operating Ambient Temperature Range
T
A
25 to +105
°
C
Storage Temperature Range
T
stg
55 to +150
°
C
ESD Capability, HBM (All pins except V
CC
pin) (Note 1)
2.0
kV
ESD Capability, Machine Model (All pins except V
CC
pin) (Note 1)
Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
1. This device series contains ESD protection and exceeds the following tests:
Human Body Model (HBM)
2.0 kV per JEDEC standard: JESD22A114.
Machine Model (MM)
200 V per JEDEC standard: JESD22A115.
2. Latchup Current Maximum Rating:
150 mA per JEDEC standard: JESD78.
200
V
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
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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(kāi)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(kāi)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(kāi)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(kāi)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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