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UC1527AL883B PDF预览

UC1527AL883B

更新时间: 2024-11-04 23:13:59
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脉冲
页数 文件大小 规格书
9页 440K
描述
Regulating Pulse Width Modulators

UC1527AL883B 技术参数

是否无铅:含铅是否Rohs认证:不符合
生命周期:Obsolete零件包装代码:QLCC
包装说明:CERAMIC, LCC-20针数:20
Reach Compliance Code:not_compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.79
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 VJESD-30 代码:S-CQCC-N20
长度:8.89 mm功能数量:1
端子数量:20最高工作温度:125 °C
最低工作温度:-55 °C最大输出电流:0.5 A
标称输出电压:5.1 V封装主体材料:CERAMIC, METAL-SEALED COFIRED
封装代码:QCCN封装等效代码:LCC20,.35SQ
封装形状:SQUARE封装形式:CHIP CARRIER
峰值回流温度(摄氏度):NOT SPECIFIED认证状态:Not Qualified
筛选级别:MIL-STD-883 Class B座面最大高度:2.03 mm
子类别:Switching Regulator or Controllers表面贴装:YES
切换器配置:PUSH-PULL最大切换频率:400 kHz
技术:BIPOLAR温度等级:MILITARY
端子形式:NO LEAD端子节距:1.27 mm
端子位置:QUAD处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:8.89 mmBase Number Matches:1

UC1527AL883B 数据手册

 浏览型号UC1527AL883B的Datasheet PDF文件第2页浏览型号UC1527AL883B的Datasheet PDF文件第3页浏览型号UC1527AL883B的Datasheet PDF文件第4页浏览型号UC1527AL883B的Datasheet PDF文件第5页浏览型号UC1527AL883B的Datasheet PDF文件第6页浏览型号UC1527AL883B的Datasheet PDF文件第7页 
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  

UC1527AL883B 替代型号

型号 品牌 替代类型 描述 数据表
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