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  • UC2525AN图
  • 深圳市高捷芯城科技有限公司

     该会员已使用本站11年以上
  • UC2525AN 现货库存
  • 数量5080 
  • 厂家TI(德州仪器) 
  • 封装PDIP-16 
  • 批号23+ 
  • 百分百原装正品,可原型号开票
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    QQ:3007947087QQ:3007947087 复制
  • 0755-83062789 QQ:3007977934QQ:3007947087
  • UC2525AN图
  • 深圳市广百利电子有限公司

     该会员已使用本站6年以上
  • UC2525AN 现货库存
  • 数量18500 
  • 厂家TI(德州仪器) 
  • 封装PDIP-16 
  • 批号23+ 
  • ★★全网低价,原装原包★★
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  • 0755-83235525 QQ:1483430049
  • UC2525AN图
  • 深圳市芯脉实业有限公司

     该会员已使用本站11年以上
  • UC2525AN 现货库存
  • 数量25 
  • 厂家TI 
  • 封装PDIP (N) 
  • 批号新批次 
  • 新到现货、一手货源、当天发货、bom配单
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  • 075584507705 QQ:2881512844
  • UC2525AN图
  • 深圳市富科达科技有限公司

     该会员已使用本站13年以上
  • UC2525AN
  • 数量2400 
  • 厂家TI 
  • 封装DIP-16 
  • 批号2020+ 
  • 全新原装进口现货特价热卖,长期供货
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    QQ:1220223788QQ:1220223788 复制
  • 0755-28767101 QQ:1327510916QQ:1220223788
  • UC2525AN图
  • 深圳市驰天熠电子有限公司

     该会员已使用本站1年以上
  • UC2525AN
  • 数量33560 
  • 厂家TI(德州仪器) 
  • 封装PDIP-16 
  • 批号23+ 
  • 全新原装,优势价格,支持配单
  • QQ:3003795629QQ:3003795629 复制
    QQ:534325024QQ:534325024 复制
  • 86-15802056765 QQ:3003795629QQ:534325024
  • UC2525AN图
  • 深圳市正信鑫科技有限公司

     该会员已使用本站12年以上
  • UC2525AN
  • 数量3144 
  • 厂家TI 
  • 封装原厂封装 
  • 批号22+ 
  • 原装正品★真实库存★价格优势★欢迎来电洽谈
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    QQ:2440138151QQ:2440138151 复制
  • 0755-22655674 QQ:1686616797QQ:2440138151
  • UC2525AN图
  • 深圳市浩兴林电子有限公司

     该会员已使用本站16年以上
  • UC2525AN
  • 数量3632 
  • 厂家UNITRODE 
  • 封装DIP 
  • 批号2017+ 
  • 优势库存现货,部分无铅
  • QQ:382716594QQ:382716594 复制
    QQ:351622092QQ:351622092 复制
  • 0755-82532799 QQ:382716594QQ:351622092
  • UC2525AN图
  • 北京耐芯威科技有限公司

     该会员已使用本站12年以上
  • UC2525AN
  • 数量4000 
  • 厂家 
  • 封装 
  • 批号21+ 
  • 原装正品,公司现货
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    QQ:1344056792QQ:1344056792 复制
  • 010-62104931 QQ:2880824479QQ:1344056792
  • UC2525AN图
  • 深圳市捷立辉科技有限公司

     该会员已使用本站10年以上
  • UC2525AN
  • 数量10000 
  • 厂家TI/德州仪器 
  • 封装NA 
  • 批号21+ 
  • 专营TI原装正品现货/可开增值税发票
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  • -0755-82792948 QQ:1803576909
  • UC2525AN图
  • 深圳市得捷芯城科技有限公司

     该会员已使用本站11年以上
  • UC2525AN
  • 数量6250 
  • 厂家TI/德州仪器 
  • 封装NA/ 
  • 批号23+ 
  • 原装现货,当天可交货,原型号开票
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    QQ:3007947087QQ:3007947087 复制
  • 0755-82546830 QQ:3007977934QQ:3007947087
  • UC2525AN图
  • 北京元坤伟业科技有限公司

     该会员已使用本站17年以上
  • UC2525AN
  • 数量5000 
  • 厂家UC 
  • 封装DIP 
  • 批号2024+ 
  • 百分百原装正品,现货库存
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    QQ:1594462451QQ:1594462451 复制
  • 010-62104931 QQ:857273081QQ:1594462451
  • UC2525AN图
  • 深圳市亿智腾科技有限公司

     该会员已使用本站8年以上
  • UC2525AN
  • 数量16680 
  • 厂家TI 
  • 封装PDIP16 
  • 批号16+ 
  • 假一赔十★全新原装现货★★特价供应★工厂客户可放款
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    QQ:2777237833QQ:2777237833 复制
  • 0755-82566711 QQ:799387964QQ:2777237833
  • UC2525AN图
  • 北京云中青城科技有限公司

     该会员已使用本站8年以上
  • UC2525AN
  • 数量6000 
  • 厂家Texas Instruments 
  • 封装PDIP-16 
  • 批号20+ 
  • 只做原装.诚信经营
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    QQ:260779663QQ:260779663 复制
  • 010-62669145 QQ:1290208342QQ:260779663
  • UC2525AN图
  • 北京元坤伟业科技有限公司

     该会员已使用本站17年以上
  • UC2525AN
  • 数量5000 
  • 厂家UC 
  • 封装DIP 
  • 批号16+ 
  • 百分百原装正品,现货库存
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    QQ:1594462451QQ:1594462451 复制
  • 010-62106431 QQ:857273081QQ:1594462451
  • UC2525AN图
  • 北京顺科电子科技有限公司

     该会员已使用本站8年以上
  • UC2525AN
  • 数量5500 
  • 厂家TI 
  • 封装SO//DIP 
  • 批号21+ 
  • 进口品牌//国产品牌代理商18911556207
  • QQ:729566152QQ:729566152 复制
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  • 18911556207 QQ:729566152QQ:1138731127
  • UC2525AN图
  • 深圳市华斯顿电子科技有限公司

     该会员已使用本站16年以上
  • UC2525AN
  • 数量12500 
  • 厂家TI 
  • 封装Original 
  • 批号2023+ 
  • 绝对原装正品现货/优势渠道商、原盘原包原盒
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    QQ:515102657QQ:515102657 复制
  • 深圳分公司0755-83777708“进口原装正品专供” QQ:1002316308QQ:515102657
  • UC2525AN图
  • 深圳市华斯顿电子科技有限公司

     该会员已使用本站16年以上
  • UC2525AN
  • 数量12500 
  • 厂家UC 
  • 封装 
  • 批号2023+ 
  • 绝对原装全新正品现货/优势渠道商、原盘原包原盒
  • QQ:364510898QQ:364510898 复制
    QQ:515102657QQ:515102657 复制
  • 0755-83777708“进口原装正品专供” QQ:364510898QQ:515102657
  • UC2525AN图
  • 深圳市欧瑞芯科技有限公司

     该会员已使用本站11年以上
  • UC2525AN
  • 数量9500 
  • 厂家TI(德州仪器) 
  • 封装16-DIP(0.300,7.62mm) 
  • 批号23+/24+ 
  • 绝对原装正品,可开13%专票,欢迎采购!!!
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  • 18565729389 QQ:3354557638QQ:3354557638
  • UC2525AN-UC2525AN图
  • 集好芯城

     该会员已使用本站13年以上
  • UC2525AN-UC2525AN
  • 数量12527 
  • 厂家TI/德州仪器 
  • 封装DIP16 
  • 批号最新批次 
  • 原厂原装公司现货
  • QQ:3008092965QQ:3008092965 复制
    QQ:3008092965QQ:3008092965 复制
  • 0755-83239307 QQ:3008092965QQ:3008092965
  • UC2525AN图
  • 深圳市毅创腾电子科技有限公司

     该会员已使用本站16年以上
  • UC2525AN
  • 数量1904 
  • 厂家TI 
  • 封装DIP16 
  • 批号22+ 
  • ★只做原装★正品现货★原盒原标★
  • QQ:2355507162QQ:2355507162 复制
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  • 86-755-83616256 QQ:2355507162QQ:2355507165
  • UC2525AN图
  • 千层芯半导体(深圳)有限公司

     该会员已使用本站9年以上
  • UC2525AN
  • 数量30000 
  • 厂家TI 
  • 封装PDIP16 
  • 批号2018+ 
  • TI一级代理商专营进口原装现货假一赔十
  • QQ:2685694974QQ:2685694974 复制
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  • 0755-83978748,0755-23611964,13760152475 QQ:2685694974QQ:2593109009
  • UC2525AN图
  • 深圳市宏世佳电子科技有限公司

     该会员已使用本站13年以上
  • UC2525AN
  • 数量3715 
  • 厂家TI 
  • 封装16-DIP(0.300,7.62mm) 
  • 批号2023+ 
  • 全新原厂原装产品、公司现货销售
  • QQ:2881894393QQ:2881894393 复制
    QQ:2881894392QQ:2881894392 复制
  • 0755- QQ:2881894393QQ:2881894392
  • UC2525AN图
  • 深圳市晶美隆科技有限公司

     该会员已使用本站15年以上
  • UC2525AN
  • 数量68000 
  • 厂家TI/德州仪器 
  • 封装DIP-16 
  • 批号24+ 
  • 假一罚十,原装进口正品现货供应,价格优势。
  • QQ:198857245QQ:198857245 复制
  • 0755-82865294 QQ:198857245
  • UC2525AN图
  • 深圳市恒达亿科技有限公司

     该会员已使用本站16年以上
  • UC2525AN
  • 数量3500 
  • 厂家UC 
  • 封装DIP-16 
  • 批号25+ 
  • 全新原装现货特价销售!
  • QQ:867789136QQ:867789136 复制
    QQ:1245773710QQ:1245773710 复制
  • 0755-82723761 QQ:867789136QQ:1245773710
  • UC2525AN图
  • 首天国际(深圳)科技有限公司

     该会员已使用本站16年以上
  • UC2525AN
  • 数量6950 
  • 厂家TI 
  • 封装原厂封装 
  • 批号2024+ 
  • 百分百原装正品,现货库存
  • QQ:528164397QQ:528164397 复制
    QQ:1318502189QQ:1318502189 复制
  • 0755-82807802 QQ:528164397QQ:1318502189
  • UC2525AN图
  • 深圳市凯信扬科技有限公司

     该会员已使用本站7年以上
  • UC2525AN
  • 数量69680 
  • 厂家TI/德州仪器 
  • 封装NA 
  • 批号21+ 
  • 诚信商家,主营品牌,价格优势!!!
  • QQ:872328909QQ:872328909 复制
  • 0755-82518059 QQ:872328909
  • UC2525ANG4图
  • 深圳市宏世佳电子科技有限公司

     该会员已使用本站13年以上
  • UC2525ANG4
  • 数量3577 
  • 厂家TI 
  • 封装16-DIP 
  • 批号2023+ 
  • 全新原厂原装产品、公司现货销售
  • QQ:2881894392QQ:2881894392 复制
    QQ:2881894393QQ:2881894393 复制
  • 0755-82556029 QQ:2881894392QQ:2881894393
  • UC2525AN图
  • 深圳市科雨电子有限公司

     该会员已使用本站9年以上
  • UC2525AN
  • 数量9800 
  • 厂家TI 
  • 封装DIP-16 
  • 批号24+ 
  • 原厂渠道,全新原装现货,欢迎查询!
  • QQ:97877807QQ:97877807 复制
  • 171-4755-1968(微信同号) QQ:97877807
  • UC2525AN图
  • 上海磐岳电子有限公司

     该会员已使用本站11年以上
  • UC2525AN
  • 数量5800 
  • 厂家TI 
  • 封装DIP-16 
  • 批号2024+ 
  • 全新原装现货,杜绝假货。
  • QQ:3003653665QQ:3003653665 复制
    QQ:1325513291QQ:1325513291 复制
  • 021-60341766 QQ:3003653665QQ:1325513291
  • UC2525AN图
  • 深圳市宏诺德电子科技有限公司

     该会员已使用本站8年以上
  • UC2525AN
  • 数量68000 
  • 厂家TI 
  • 封装PDIP16 
  • 批号22+ 
  • 全新进口原厂原装,优势现货库存,有需要联系电话:18818596997 QQ:84556259
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  • UC2525AN图
  • 万三科技(深圳)有限公司

     该会员已使用本站2年以上
  • UC2525AN
  • 数量660000 
  • 厂家Texas Instruments(德州仪器) 
  • 封装16-DIP (0.300 
  • 批号7.62mm) 
  • QQ:3008961398QQ:3008961398 复制
  • 0755-21006672 QQ:3008961398
  • UC2525AN图
  • 深圳市芯福林电子有限公司

     该会员已使用本站15年以上
  • UC2525AN
  • 数量13880 
  • 厂家TI/德州仪器 
  • 封装PDIP16 
  • 批号21+ 
  • 公司只售原装 支持实单
  • QQ:2881495751QQ:2881495751 复制
  • 0755-88917743 QQ:2881495751
  • UC2525AN 其他被动元件图
  • 深圳市羿芯诚电子有限公司

     该会员已使用本站7年以上
  • UC2525AN 其他被动元件
  • 数量8500 
  • 厂家原厂品牌 
  • 封装原厂封装 
  • 批号新年份 
  • 羿芯诚只做原装长期供,支持实单
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  • 0755-82570600 QQ:2880123150
  • UC2525ANG4图
  • 万三科技(深圳)有限公司

     该会员已使用本站2年以上
  • UC2525ANG4
  • 数量6500000 
  • 厂家TI 
  • 封装原厂原装 
  • 批号22+ 
  • 万三科技 秉承原装 实单可议
  • QQ:3008962483QQ:3008962483 复制
  • 0755-23763516 QQ:3008962483
  • UC2525AN图
  • 深圳市隆鑫创展电子有限公司

     该会员已使用本站15年以上
  • UC2525AN
  • 数量30000 
  • 厂家TI 
  • 封装SOT563 
  • 批号2022+ 
  • 电子元器件一站式配套服务QQ:122350038
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  • 0755-82812278 QQ:2355878626QQ:2850299242
  • UC2525AN图
  • 深圳市创思克科技有限公司

     该会员已使用本站2年以上
  • UC2525AN
  • 数量10000 
  • 厂家TI/德州仪器 
  • 封装NA 
  • 批号20+ 
  • 全新原装挺实单欢迎来撩/可开票
  • QQ:1092793871QQ:1092793871 复制
  • -0755-88910020 QQ:1092793871

产品型号UC2525AN的概述

UC2525AN芯片概述 UC2525AN是一款广泛应用于电源管理和控制的集成电路,尤其是在开关电源(SMPS)和脉宽调制(PWM)控制器中。它由Microchip Technology Inc.出品,功能十分强大,主要用于产生高稳定性的输出信号,以驱动功率MOSFET或其他功率设备。这款芯片的设计旨在满足高性能和高效率的需求,适合多种电源转换应用。 UC2525AN具有多种输入和输出电压配置,能够适应不同的工作环境和负载条件,因而在广泛的行业中得到应用,包括消费电子、工业控制和医疗设备等。 UC2525AN的详细参数 UC2525AN的电气特性表如下,涵盖了其重要的电气参数和工作特性: - 电源电压范围:10V至30V - 输出电压范围:可调节,输出电压通常为0V至各类设计要求 - 工作频率:典型工作频率为50kHz至500kHz - 参考电压:内部提供5V±2%参考电压 - 启动电...

产品型号UC2525AN的Datasheet PDF文件预览

UC1525A/27A  
UC2525A/27A  
UC3525A/27A  
Regulating Pulse Width Modulators  
FEATURES  
DESCRIPTION  
8 to 35V Operation  
The UC1525A/1527A series of pulse width modulator integrated circuits are de-  
signed to offer improved performance and lowered external parts count when  
used in designing all types of switching power supplies. The on-chip +5.1V ref-  
erence is trimmed to ±1% and the input common-mode range of the error ampli-  
fier includes the reference voltage, eliminating external resistors. A sync input to  
the oscillator allows multiple units to be slaved or a single unit to be synchro-  
nized to an external system clock. A single resistor between the CT and the dis-  
charge terminals provides a wide range of dead-time adjustment. These  
devices also feature built-in soft-start circuitry with only an external timing ca-  
pacitor required. A shutdown terminal controls both the soft-start circuitry and  
the output stages, providing instantaneous turn off through the PWM latch with  
pulsed shutdown, as well as soft-start recycle with longer shutdown commands.  
These functions are also controlled by an undervoltage lockout which keeps the  
outputs off and the soft-start capacitor discharged for sub-normal input volt-  
ages. This lockout circuitry includes approximately 500mV of hysteresis for jit-  
ter-free operation. Another feature of these PWM circuits is a latch following the  
comparator. Once a PWM pulse has been terminated for any reason, the out-  
puts will remain off for the duration of the period. The latch is reset with each  
clock pulse. The output stages are totem-pole designs capable of sourcing or  
sinking in excess of 200mA. The UC1525A output stage features NOR logic,  
giving a LOW output for an OFF state. The UC1527A utilizes OR logic which  
results in a HIGH output level when OFF.  
5.1V Reference Trimmed to ±1%  
100Hz to 500kHz Oscillator Range  
Separate Oscillator Sync Terminal  
Adjustable Deadtime Control  
Internal Soft-Start  
Pulse-by-Pulse Shutdown  
Input Undervoltage Lockout with  
Hysteresis  
Latching PWM to Prevent Multiple  
Pulses  
Dual Source/Sink Output Drivers  
BLOCK DIAGRAM  
OSC  
OUT  
VREF  
16  
4
13  
11  
VC  
NOR  
UVLO  
Lockout  
Reference  
Regulator  
+VIN 15  
OUTPUT A  
GROUND 12  
To internal  
circuitry  
SYNC  
RT  
3
6
5
7
Flip  
Flop  
NOR  
OSC  
CT  
14  
OUTPUT B  
DISCHARGE  
UC1525A Output Stage  
13  
11  
VC  
COMP  
R
S
S
OR  
COMPENSATION  
INV INPUT  
9
1
2
8
PWM  
La tch  
Error  
Amp  
VREF  
50 µA  
OUTPUT A  
NI INPUT  
SOFTSTART  
OR  
3 kΩ  
SHUTDOWN 10  
14  
OUTPUT B  
5 kΩ  
UC1527A Output Stage  
SLUS191B - February 1997 - Revised June 2005  
UC1525A/27A  
UC2525A/27A  
UC3525A/27A  
ABSOLUTE MAXIMUM RATINGS(Note 1)  
RECOMMENDED OPERATING CONDITIONS  
(Note 3)  
Supply Voltage, (+VIN). . . . . . . . . . . . . . . . . . . . . . . . . . . . +40V  
Collector Supply Voltage (VC) . . . . . . . . . . . . . . . . . . . . . . +40V  
Logic Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to +5.5V  
Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to +VIN  
Output Current, Source or Sink . . . . . . . . . . . . . . . . . . . 500mA  
Reference Output Current . . . . . . . . . . . . . . . . . . . . . . . . 50mA  
Oscillator Charging Current . . . . . . . . . . . . . . . . . . . . . . . . 5mA  
Power Dissipation at TA = +25°C (Note 2). . . . . . . . . . 1000mW  
Power Dissipation at TC = +25°C (Note 2) . . . . . . . . . 2000mW  
Operating Junction Temperature . . . . . . . . . . –55°C to +150°C  
Storage Temperature Range . . . . . . . . . . . . . –65°C to +150°C  
Lead Temperature (Soldering, 10 seconds) . . . . . . . . . +300°C  
Note 1: Values beyond which damage may occur.  
Input Voltage (+VIN) . . . . . . . . . . . . . . . . . . . . . . . +8V to +35V  
Collector Supply Voltage (VC). . . . . . . . . . . . . . . +4.5V to +35V  
Sink/Source Load Current (steady state) . . . . . . . . 0 to 100mA  
Sink/Source Load Current (peak) . . . . . . . . . . . . . . 0 to 400mA  
Reference Load Current . . . . . . . . . . . . . . . . . . . . . . 0 to 20mA  
Oscillator Frequency Range. . . . . . . . . . . . . . 100Hz to 400kHz  
Oscillator Timing Resistor . . . . . . . . . . . . . . . . . . 2kto 150kΩ  
Oscillator Timing Capacitor . . . . . . . . . . . . . . . .001µF to .01µF  
Dead Time Resistor Range . . . . . . . . . . . . . . . . . . . . 0 to 500Ω  
Operating Ambient Temperature Range  
UC1525A, UC1527A . . . . . . . . . . . . . . . . . . –55°C to +125°C  
UC2525A, UC2527A . . . . . . . . . . . . . . . . . . . –25°C to +85°C  
UC3525A, UC3527A . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C  
Note 3: Range over which the device is functional and parame-  
ter limits are guaranteed.  
Note 2: Consult packaging Section of Databook for thermal  
limitations and considerations of package.  
CONNECTION DIAGRAMS  
DIL-16 (TOP VIEW)  
J or N Package  
PLCC-20, LCC-20 (TOP VIEW)  
Q, L Package  
PACKAGE PIN FUNCTION  
FUNCTION  
N/C  
PIN  
1
Inv. Input  
N.I. Input  
SYNC  
2
3
4
OSC. output  
N/C  
5
6
CT  
7
RT  
8
Discharge  
Softstart  
N/C  
Compensation  
Shutdown  
Output A  
Ground  
N/C  
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
VC  
Output B  
+VIN  
VREF  
2
UC1525A/27A  
UC2525A/27A  
UC3525A/27A  
ELECTRICAL CHARACTERISTICS:+VIN = 20V, and over operating temperature, unless otherwise specified, TA = TJ.  
UC1525A/UC2525A  
UC1527A/UC2527A  
UC3525A  
UC3527A  
UNITS  
PARAMETER  
Reference Section  
TEST CONDITIONS  
MIN  
TYP  
MAX  
MIN  
TYP  
MAX  
Output Voltage  
TJ = 25°C  
IN = 8 to 35V  
5.05  
5.10  
10  
5.15  
20  
5.00  
5.10  
10  
5.20  
20  
V
Line Regulation  
V
mV  
mV  
Load Regulation  
IL = 0 to 20mA  
20  
50  
20  
50  
Temperature Stability (Note 5)  
Total Output Variation (Note 5)  
Shorter Circuit Current  
Output Noise Voltage (Note 5)  
Long Term Stability (Note 5)  
Oscillator Section(Note 6)  
Initial Accuracy (Notes 5 & 6)  
Voltage Stability (Notes 5 & 6)  
Temperature Stability (Note 5)  
Minimum Frequency  
Over Operating Range  
Line, Load, and Temperature  
20  
50  
20  
50  
5.00  
5.20  
100  
200  
50  
4.95  
5.25  
100  
V
V
REF = 0, TJ = 25°C  
80  
40  
20  
80  
40  
20  
mA  
10Hz 10kHz, TJ = 25°C  
200 µVrms  
TJ = 125°C  
50  
mV  
TJ = 25°C  
± 2  
± 0.3  
± 3  
± 6  
± 1  
± 6  
120  
± 2  
± 1  
± 3  
± 6  
± 2  
± 6  
120  
%
%
VIN = 8 to 35V  
Over Operating Range  
RT = 200k, CT = 0.1µF  
RT = 2k, CT = 470pF  
%
Hz  
kHz  
mA  
V
Maximum Frequency  
400  
1.7  
3.0  
0.3  
1.2  
400  
1.7  
3.0  
0.3  
1.2  
Current Mirror  
I
RT = 2mA  
2.0  
3.5  
0.5  
2.0  
1.0  
2.2  
2.0  
3.5  
0.5  
2.0  
1.0  
2.2  
Clock Amplitude (Notes 5 & 6)  
Clock Width (Notes 5 & 6)  
Sync Threshold  
TJ = 25°C  
1.0  
2.8  
2.5  
1.0  
2.8  
2.5  
µs  
V
Sync Input Current  
Sync Voltage = 3.5V  
mA  
Error Amplifier Sectio(nVCM = 5.1V)  
Input Offset Voltage  
0.5  
1
5
10  
1
2
1
10  
10  
1
mV  
µA  
Input Bias Current  
Input Offset Current  
µA  
DC Open Loop Gain  
RL 10MΩ  
60  
1
75  
2
60  
1
75  
2
dB  
Gain-Bandwidth Product  
(Note 5)  
AV = 0dB, TJ = 25°C  
MHz  
DC Transconductance  
(Notes 5 & 7)  
TJ = 25°C, 30kΩ ≤ RL 1MΩ  
1.1  
1.5  
1.1  
1.5  
mS  
Output Low Level  
0.2  
5.6  
75  
0.5  
0.2  
5.6  
75  
0.5  
V
V
Output High Level  
3.8  
60  
50  
3.8  
60  
50  
Common Mode Rejection  
Supply Voltage Rejection  
V
V
CM = 1.5 to 5.2V  
IN = 8 to 35V  
dB  
dB  
60  
60  
Note 5: These parameters, although ensured over the recommended operating conditions, are not 100% tested in production.  
Note 6: Tested at fOSC = 40kHz (RT = 3.6kW, CT = 0.01mF, RD = 0W). Approximate oscillator frequency is defined by:  
1
f =  
CT (0.7RT + 3RD )  
Note 7: DC transconductance (gM) relates to DC open-loop voltage gain (AV) according to the following equation: AV = gMRL  
where RL is the resistance from pin 9 to ground. The minimum gM specification is used to calculate minimum AV when the  
error amplifier output is loaded.  
3
UC1525A/27A  
UC2525A/27A  
UC3525A/27A  
ELECTRICAL CHARACTERISTICS:+VIN = 20V, and over operating temperature, unless otherwise specified, TA = TJ.  
UC1525A/UC2525A  
UC1527A/UC2527A  
UC3525A  
UC3527A  
UNITS  
PARAMETER  
PWM Comparator  
TEST CONDITIONS  
MIN  
TYP  
MAX  
MIN  
TYP  
MAX  
Minimum Duty-Cycle  
0
0
%
%
V
Maximum Duty-Cycle (Note 6)  
Input Threshold (Note 6)  
45  
49  
0.9  
3.3  
.05  
45  
49  
0.9  
3.3  
.05  
Zero Duty-Cycle  
Maximum Duty-Cycle  
0.7  
0.7  
3.6  
1.0  
3.6  
1.0  
V
Input Bias Current (Note 5)  
Shutdown Section  
µA  
Soft Start Current  
V
V
SD = 0V, VSS = 0V  
SD = 2.5V  
25  
50  
0.4  
0.8  
0.4  
0.2  
80  
0.7  
1.0  
1.0  
0.5  
25  
50  
0.4  
0.8  
0.4  
0.2  
80  
0.7  
1.0  
1.0  
0.5  
µA  
V
Soft Start Low Level  
Shutdown Threshold  
Shutdown Input Current  
Shutdown Delay (Note 5)  
To outputs, VSS = 5.1V, TJ = 25°C  
SD = 2.5V  
VSD = 2.5V, TJ = 25°C  
0.6  
0.6  
V
V
mA  
µs  
Output Drivers(Each Output) (VC = 20V)  
Output Low Level  
Output High Level  
I
SINK = 20mA  
0.2  
1.0  
19  
18  
7
0.4  
2.0  
0.2  
1.0  
19  
18  
7
0.4  
2.0  
V
V
ISINK = 100mA  
I
I
SOURCE = 20mA  
SOURCE = 100mA  
18  
17  
6
18  
17  
6
V
V
Under-Voltage Lockout  
VC OFF Current (Note 7)  
Rise Time (Note 5)  
V
COMP and VSS = High  
8
8
V
VC = 35V  
200  
600  
300  
200  
600  
300  
µA  
ns  
ns  
CL = 1nF, TJ = 25°C  
CL = 1nF, TJ = 25°C  
100  
50  
100  
50  
Fall Time (Note 5)  
Total Standby Current  
Supply Current  
VIN = 35V  
14  
20  
14  
20  
mA  
Note 5: These parameters, although ensured over the recommended operating conditions, are not 100% tested in production.  
Note 6: Tested at fOSC = 40kHz (RT = 3.6kW, CT = 0.01mF, RD = 0W)  
Note 7: Collector off-state quiescent current measured at pin 13 with outputs low for UC1525A and high for UC1527A.  
4
UC1525A/27A  
UC2525A/27A  
UC3525A/27A  
PRINCIPLES OF OPERATION AND TYPICAL CHARACTERISTICS  
UC1525A output circuit (1/2 circuit shown).  
UC1525A output saturation characteristics.  
For single-ended supplies, the driver outputs are  
grounded. The VC terminal is switched to ground by the  
totem-pole source transistors on alternate oscillator  
cycles.  
In conventional push-pull bipolar designs, forward base  
drive is controlled by R1-R3. Rapid turn-off times for the  
power devices are achieved with speed-up capacitors  
C1 and C2.  
The low source impedance of the output drivers provides  
rapid charging of power FET Input capacitance while  
minimizing external components.  
Low power transformers can be driven by the UC1525A.  
Automatic reset occurs during dead time, when both  
ends of the primary winding are switched to ground.  
5
UC1525A/27A  
UC2525A/27A  
UC3525A/27A  
UC1525A oscillator schematic.  
PRINCIPLES OF OPERATION AND TYPICAL CHARAC- turn-off signal to the outputs; and a 150µA-current sink  
TERISTIC SHUTDOWN OPTIONS  
(See Block Diagram)  
begins to discharge the external soft-start capacitor. If the  
shutdown command is short, the PWM signal is termi-  
nated without significant discharge of the soft-start ca-  
Since both the compensation and soft-start terminals  
(Pins 9 and 8) have current source pull-ups, either can  
readily accept a pull-down signal which only has to sink a  
maximum of 100µA to turn off the outputs. This is subject  
to the added requirement of discharging whatever exter-  
nal capacitance may be attached to these pins.  
pacitor, thus, allowing, for example,  
a convenient  
implementation of pulse-by-pulse current limiting. Holding  
Pin 10 high for a longer duration, however, will ultimately  
discharge this external capacitor, recycling slow turn-on  
upon release.  
Pin 10 should not be left floating as noise pickup could  
conceivably interrupt normal operation. All transitions of  
the voltage on pin 10 should be within the time frame of  
one clock cycle and not repeated at a frequency higher  
than 10 clock cycles.  
An alternate approach is the use of the shutdown circuitry  
of Pin 10 which has been improved to enhance the avail-  
able shutdown options. Activating this circuit by applying  
a positive signal on Pin 10 performs two functions; the  
PWM latch is immediately set providing the fastest  
Oscillator Charge Time vs RT and CT.  
Oscillator Discharge Time vs RD and CT.  
6
UC1525A/27A  
UC2525A/27A  
UC3525A/27A  
RL is impedance from pin 9 to ground. Values below 30kΩ  
will begin to limit the maximum duty cycle.  
Maximum value RD vs minimum value RT.  
Error amplifier voltage gain and phase vs frequency.  
Lab test fixture.  
7
UC1525A/27A  
UC2525A/27A  
UC3525A/27A  
REVISION HISTORY  
REVISION  
DATE  
CHANGE  
SLUS191B  
6/28/05  
Updated pin 10 description in the Principles of Operation and Typical  
Characteristics Shutdown Options Section.  
8
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配单直通车
UC2525AN产品参数
型号:UC2525AN
Brand Name:Texas Instruments
是否无铅:不含铅
是否Rohs认证:符合
生命周期:Active
IHS 制造商:TEXAS INSTRUMENTS INC
零件包装代码:DIP
包装说明:DIP, DIP16,.3
针数:16
Reach Compliance Code:compliant
ECCN代码:EAR99
HTS代码:8542.39.00.01
Factory Lead Time:6 weeks
风险等级:0.63
Samacsys Confidence:3
Samacsys Status:Released
Samacsys PartID:418204
Samacsys Pin Count:16
Samacsys Part Category:Integrated Circuit
Samacsys Package Category:Dual-In-Line Packages
Samacsys Footprint Name:dip-16
Samacsys Released Date:2017-01-12 12:59:53
Is Samacsys:N
模拟集成电路 - 其他类型:SWITCHING CONTROLLER
控制模式:VOLTAGE-MODE
控制技术:PULSE WIDTH MODULATION
最大输入电压:35 V
最小输入电压:8 V
标称输入电压:20 V
JESD-30 代码:R-PDIP-T16
JESD-609代码:e4
长度:19.3 mm
功能数量:1
端子数量:16
最高工作温度:85 °C
最低工作温度:-25 °C
最大输出电流:0.5 A
最大输出电压:5.15 V
最小输出电压:5.05 V
标称输出电压:5.1 V
封装主体材料:PLASTIC/EPOXY
封装代码:DIP
封装等效代码:DIP16,.3
封装形状:RECTANGULAR
封装形式:IN-LINE
峰值回流温度(摄氏度):NOT APPLICABLE
认证状态:Not Qualified
座面最大高度:3.9 mm
子类别:Switching Regulator or Controllers
表面贴装:NO
切换器配置:PUSH-PULL
最大切换频率:400 kHz
技术:BIPOLAR
温度等级:OTHER
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 APPLICABLE
宽度:6.35 mm
Base Number Matches:1
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