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UCC38502NG4 PDF预览

UCC38502NG4

更新时间： 2024-11-23 12:02:03
品牌 Logo 应用领域
德州仪器 - TI 稳压器开关式稳压器或控制器电源电路开关式控制器功率因数校正光电二极管信息通信管理
页数 文件大小 规格书
35页 914K
描述
BiCMOS PFC/PWM COMBINATION CONTROLLER

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UCC38502NG4 技术参数

是否无铅：不含铅是否Rohs认证：符合
生命周期：Active零件包装代码：DIP
包装说明：DIP, DIP20,.3针数：20
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：6 weeks
风险等级：5.22Is Samacsys：N
其他特性：CAN ALSO BE PROGRAMMED FOR CURRENT MODE AND VOLTAGE MODE模拟集成电路 - 其他类型：POWER FACTOR CONTROLLER WITH POST REGULATOR
控制模式：CURRENT-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：15 V最小输入电压：10.3 V
标称输入电压：12 VJESD-30 代码：R-PDIP-T20
JESD-609代码：e4长度：25.4 mm
功能数量：1端子数量：20
最高工作温度：70 °C最低工作温度：
最大输出电流：1.2 A封装主体材料：PLASTIC/EPOXY
封装代码：DIP封装等效代码：DIP20,.3
封装形状：RECTANGULAR封装形式：IN-LINE
峰值回流温度（摄氏度）：NOT SPECIFIED认证状态：Not Qualified
座面最大高度：5.08 mm子类别：Switching Regulator or Controllers
最大供电电流 (Isup)：4 mA最大供电电压 (Vsup)：18 V
标称供电电压 (Vsup)：12 V表面贴装：NO
切换器配置：BOOST最大切换频率：120 kHz
技术：BICMOS温度等级：COMMERCIAL
端子面层：Nickel/Palladium/Gold (Ni/Pd/Au)端子形式：THROUGH-HOLE
端子节距：2.54 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：7.62 mm
Base Number Matches：1

UCC38502NG4 数据手册

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SLUS419C − AUGUST 1999 − REVISED NOVEMBER 2001  
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used to keep input power constant with varying input  
voltage. Generation of V is accomplished using I in  
conjunction with an external single-pole filter. This not  
only reduces external parts count, but also avoids the  
use of high-voltage components, offering a lower-cost  
solution. The multiplier then divides the line current by  
FEATURES  
FF  
AC  
D
D
Combines PFC and Downstream Converter  
Controls  
Controls Boost Preregulator to Near-Unity  
Power Factor  
the square of V  
.
D
D
D
D
D
Accurate Power Limiting  
FF  
Improved Feedforward Line Regulation  
The UCC2850x PFC section incorporates a low  
offset-voltage amplifier with 7.5-V reference,  
highly-linear multiplier capable of a wide current range,  
a high-bandwidth, low offset-current amplifier, with a  
a
Peak Current-Mode Control in Second Stage  
Programmable Oscillator  
Leading-Edge/Trailing-Edge Modulation for  
Reduced Output Ripple  
novel  
noise-attenuation  
configuration,  
PWM  
comparator and latch, and a high-current output driver.  
Additional PFC features include over-voltage  
protection, zero-power detection to turn off the output  
when VAOUT is below 0.33 V and peak current and  
power limiting.  
D
Low Start-up Supply Current  
D
Synchronized Second Stage Start-Up, with  
Programmable Soft-start  
D
Programmable Second Stage Shutdown  
The dc-to-dc section relies on an error signal generated  
on the secondary-side and processes it by performing  
peak current mode control. The dc-to-dc section also  
features current limiting, a controlled soft-start, preset  
operating range with selectable options, and 50%  
maximum duty cycle.  
DESCRIPTION  
The UCC2850x family provides all of the control  
functions necessary for an active power-factor-  
corrected preregulator and a second-stage dc-to- dc  
converter. The controller achieves near-unity power  
factor by shaping the ac input line current waveform to  
correspond to the ac input-line voltage using average  
current-mode control. The dc-to-dc converter uses  
peak current-mode control to perform the step-down  
power conversion.  
The UCC28500 and UCC28502 have a wide UVLO  
threshold (16.5 V/10 V) for bootstrap bias supply  
operation. The UCC28501 and UCC28503 are  
designed with a narrow UVLO range (10.5 V/10 V) more  
suitable for fixed bias operation. The UCC28500 and  
UCC28501 have a narrow UVLO threshold for PWM  
stage (to allow operation down to 75% of nominal bulk  
voltage), while the UCC28502 and UCC38503 are  
configured for a much wider operation range for the  
PWM stage (down to 50% of bulk nominal voltage).  
The PFC stage is leading-edge modulated while the  
second stage is trailing-edge synchronized to allow for  
minimum overlap between the boost and PWM  
switches. This reduces ripple current in the bulk-output  
capacitor.In order to operate with over three-to-one  
Available in 20-pin N and DW packages.  
range of input-line voltages, a line feedforward (V ) is  
FF  
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Copyright 2001, Texas Instruments Incorporated  
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中文翻译

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UCC38502NG4 替代型号

型号 品牌 替代类型 描述 数据表
UCC38502N TI

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