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NCP1254BSN65T1G PDF预览

NCP1254BSN65T1G

更新时间： 2024-09-18 12:02:43
品牌 Logo 应用领域
安森美 - ONSEMI 控制器
页数 文件大小 规格书
25页 376K
描述
Current-Mode PWM Controller for Off-line Power Supplies featuring Peak Power Excursion

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NCP1254BSN65T1G 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Obsolete针数：6
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：1 week
风险等级：7.98Samacsys Description：NULL
模拟集成电路 - 其他类型：SWITCHING CONTROLLER控制模式：CURRENT-MODE
JESD-30 代码：R-PDSO-G6JESD-609代码：e3
湿度敏感等级：1端子数量：6
封装主体材料：PLASTIC/EPOXY封装代码：TSOP
封装等效代码：TSOP6,.11,37封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, THIN PROFILE峰值回流温度（摄氏度）：NOT SPECIFIED
认证状态：Not Qualified子类别：Switching Regulator or Controllers
表面贴装：YES最大切换频率：71 kHz
端子面层：Tin (Sn)端子形式：GULL WING
端子节距：0.95 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIEDBase Number Matches：1

NCP1254BSN65T1G 数据手册

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NCP1254  
Product Preview  
Current-Mode PWM  
Controller for Off-line  
Power Supplies featuring  
Peak Power Excursion  
http://onsemi.com  
The NCP1254 is a highly integrated PWM controller capable of  
delivering a rugged and high performance offline power supply in a  
TSOP−6 package. With a supply range up to 35 V, the controller hosts  
a jittered 65−kHz switching circuitry operated in peak current mode  
control. When the power on the secondary side starts to decrease, the  
controller automatically folds back its switching frequency down to a  
minimum level of 26 kHz. As the power further goes down, the part  
enters skip cycle while freezing the peak current setpoint.  
1
TSOP−6  
CASE 318G  
STYLE 13  
To help building rugged converters, the controller features several  
key protective features: a non−dissipative Over Power Protection for a  
constant maximum output current regardless of the input voltage, two  
latched over voltage protection inputs − either through a dedicated pin  
MARKING DIAGRAM  
54xAYWG  
G
or via the V input and a dual−level auto−recovery/latched overload/  
cc  
short−circuit timer.  
1
The controller architecture is designed to authorize a transient peak  
power excursion when the current setpoint hits the limit. At this point,  
the switching frequency is increased from 65 kHz to 130 kHz until the  
peak event disappears. The timer duration is then modulated as the  
converter crosses a peak power excursion mode (long) or undergoes a  
short circuit (short).  
54  
x
A
Y
W
G
= Specific Device Code  
= A or B  
= Assembly Location  
= Year  
= Work Week  
= Pb−Free Package  
(Note: Microdot may be in either location)  
Features  
• 65−kHz Fixed−frequency Current−mode Control Operation with  
130−kHz Excursion  
PIN CONNECTIONS  
• Internal and Adjustable Over Power Protection (OPP) Circuit  
GND  
FB  
1
2
6
5
4
DRV  
• Frequency Foldback down to 26 kHz and Skip−cycle in Light Load  
Conditions  
V
CC  
• Adjustable Slope Compensation  
• Internally Fixed 4−ms Soft−start  
OPP/Latch  
3
CS  
• Fixed Timer−based Auto−recovery Overload/Short−circuit Protection  
(Top View)  
• 100% to 25% Timer Reduction from Overload to Short−circuit Fault  
• Double V Hiccup for a Reduced Average Power in Fault Mode  
cc  
ORDERING INFORMATION  
See detailed ordering and shipping information in the package  
dimensions section on page 2 of this data sheet.  
• Frequency Jittering in Normal and Frequency Foldback Modes  
• Latched OVP Input for Improved Robustness and Latched OVP on V  
cc  
• Up to 35−V V Maximum Rating  
cc  
• Extremely Low No−load Standby Power  
• This is a Pb−Free Device  
Typical Applications  
• Converters requiring peak−power capability such as printers power  
supplies, ac−dc adapters for game stations.  
This document contains information on a product under development. ON Semiconductor  
reserves the right to change or discontinue this product without notice.  
© Semiconductor Components Industries, LLC, 2013  
1
Publication Order Number:  
March, 2013 − Rev. P1  
NCP1254/D  
1234567...25

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