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| 型号： | NCP1351DPG |
| 厂商： | ON Semiconductor |
| 文件页数： | 1/27页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR PWM PROG CM OTP 8DIP |
| 标准包装： | 50 |
| 输出隔离： | 隔离 |
| 频率范围： | 调节 |
| 输入电压： | 9.5 V ~ 28 V |
| 工作温度： | -25°C ~ 125°C |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 8-PDIP |
| 包装： | 管件 |
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NCP1351
Variable Off Time PWM
Controller
The NCP1351 is a current-mode controller targeting low power
off-line flyback Switched Mode Power Supplies (SMPS) where cost
is of utmost importance. Based on a fixed peak current technique
(quasi-fixed T ON ), the controller decreases its switching frequency as
http://onsemi.com
1351x
ALYW
G
the load becomes lighter. As a result, a power supply using the
NCP1351 naturally offers excellent no-load power consumption,
while optimizing the efficiency in other loading conditions. When the
frequency decreases, the peak current is gradually reduced down to
approximately 30% of the maximum peak current to prevent
transformer mechanical resonance. The risk of acoustic noise is thus
8
1
MARKING DIAGRAMS
8
SOIC-8
D SUFFIX
CASE 751
1
greatly diminished while keeping good standby power performance.
An externally adjustable timer permanently monitors the feedback
activity and protects the supply in presence of a short-circuit or an
overload. Once the timer elapses, NCP1351 stops switching and stays
latched for version A, and tries to restart for version B.
Versions C and D include a dual overcurrent protection trip point,
allowing the implementation of the controller in peak-power
8
1
PDIP-8
P SUFFIX
CASE 626
1
NCP1351x
AWL
YYWWG
requirements applications such as printers and so on. When the fault is
acknowledged, C version latches-off whereas D version
auto-recovers.
x
A
L, WL
= A, B, C, or D Options
= Assembly Location
= Wafer Lot
The internal structure features an optimized arrangement which
allows one of the lowest available startup current, a fundamental
parameter when designing low standby power supplies.
The negative current sensing technique minimizes the impact of the
switching noise on the controller operation and offers the user to select
the maximum peak voltage across his current sense resistor. Its power
Y, YY = Year
W, WW = Work Week
G or G = Pb-Free Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
dissipation can thus be application optimized.
Finally, the bulk input ripple ensures a natural frequency smearing
which smooths the EMI signature.
FB 1
Ct 2
8 TIMER
7 LATCH
Features
? Quasi-fixed T ON , Variable T OFF Current Mode Control
? Extremely Low Current Consumption at Startup
? Peak Current Compression Reduces Transformer Noise
? Primary or Secondary Side Regulation
? Dedicated Latch Input for OTP, OVP
? Programmable Current Sense Resistor Peak Voltage
? Natural Frequency Dithering for Improved EMI Signature
? Easy External Over Power Protection (OPP)
? Undervoltage Lockout
? Very Low Standby Power via Off-time Expansion
? SOIC-8 Package
? Standard Overcurrent Protection, Latched or
Auto-Recovery, A & B Versions
? Dual Trip Point Overcurrent Protection, Latched or
Auto-Recovery, C & D Versions
? These are Pb-Free Devices
CS 3 6 V CC
GND 4 5 DRV
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
Typical Applications
? Auxiliary Power Supply
? Printer, Game Stations, Low-Cost Adapters
? Off-line Battery Charger
? Semiconductor Components Industries, LLC, 2007
November, 2007 - Rev. 3
1
Publication Order Number:
NCP1351/D
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP1351LEDGEVB | 功能描述:电源管理IC开发工具 20 W CONSTANT CUR LED DRV RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| NCP1351PRINTGEVB | 功能描述:电源管理IC开发工具 NCP1351 40 W PRINTER EVB RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| NCP1377 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:PWM Current-Mode Controller for Free-Running Quasi-Resonant Operation |
| NCP1377/D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:PWM Current -Mode Controller |
| NCP1377_06 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:PWM Current−Mode Controller for Free−Running Quasi−Resonant Operation |
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