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UC3823A-W

更新时间: 2024-11-04 13:15:07
品牌 Logo 应用领域
德州仪器 - TI 控制器
页数 文件大小 规格书
7页 411K
描述
High Speed PWM Controller 0-WAFERSALE

UC3823A-W 技术参数

是否无铅: 含铅生命周期:Obsolete
包装说明:DIE,Reach Compliance Code:unknown
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.74模拟集成电路 - 其他类型:SWITCHING CONTROLLER
控制模式:CURRENT/VOLTAGE-MODE控制技术:PULSE WIDTH MODULATION
最大输入电压:20 V最小输入电压:12 V
JESD-30 代码:X-XUUC-N功能数量:1
最高工作温度:70 °C最低工作温度:
最大输出电流:2 A标称输出电压:5.1 V
封装主体材料:UNSPECIFIED封装代码:DIE
封装形状:UNSPECIFIED封装形式:UNCASED CHIP
表面贴装:YES最大切换频率:1150 kHz
温度等级:COMMERCIAL端子形式:NO LEAD
端子位置:UPPERBase Number Matches:1

UC3823A-W 数据手册

 浏览型号UC3823A-W的Datasheet PDF文件第2页浏览型号UC3823A-W的Datasheet PDF文件第3页浏览型号UC3823A-W的Datasheet PDF文件第4页浏览型号UC3823A-W的Datasheet PDF文件第5页浏览型号UC3823A-W的Datasheet PDF文件第6页浏览型号UC3823A-W的Datasheet PDF文件第7页 
UC1823  
UC2823  
UC3823  
High Speed PWM Controller  
FEATURES  
DESCRIPTION  
Compatible with Voltage or Current-Mode  
Topologies  
The UC1823 family of PWM control ICs is optimized for high fre-  
quency switched mode power supply applications. Particular care  
was given to minimizing propagation delays through the compara-  
tors and logic circuitry while maximizing bandwidth and slew rate  
of the error amplifier. This controller is designed for use in either  
current-mode or voltage-mode systems with the capability for input  
voltage feed-forward.  
Practical Operation @ Switching  
Frequencies to 1.0MHz  
50ns Propagation Delay to Output  
High Current Totem Pole Output (1.5A peak)  
Wide Bandwidth Error Amplifier  
Protection circuitry includes a current limit comparator, a TTL com-  
patible shutdown port, and a soft start pin which will double as a  
maximum duty cycle clamp. The logic is fully latched to provide jit-  
ter free operation and prohibit multiple pulses at the output. An un-  
der-voltage lockout section with 800mV of hysteresis assures low  
start up current. During under-voltage lockout, the output is high im-  
pedance. The current limit reference (pin 11) is a DC input voltage to  
the current limit comparator. Consult specifications for details.  
Fully Latched Logic with Double Pulse  
Suppression  
Pulse-by-Pulse Current Limiting  
Soft Start/Max. Duty Cycle Control  
Under-Voltage Lockout with Hysteresis  
Low Start Up Current (1.1mA)  
These devices feature a totem pole output designed to source and  
sink high peak currents from capacitive loads, such as the gate of  
a power MOSFET. The on state is defined as a high level.  
Trimmed Bandgap Reference (5.1V ±1%)  
ABSOLUTE MAXIMUM RATINGS  
Supply Voltage (Pins 15, 13) . . . . . . . . . . . . . . . . . . . . . . . . 30V Oscillator Charging Current (Pin 5) . . . . . . . . . . . . . . . . . . -5mA  
Output Current, Source or Sink (Pin14) Power Dissipation at TA = 60 °C . . . . . . . . . . . . . . . . . . . . . 1W  
DC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5A Storage Temperature Range . . . . . . . . . . . . . . -65°C to +150°C  
Pulse (0.5µs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0A Lead Temperature (Soldering, 10 seconds) . . . . . . . . . . 300°C  
Analog Inputs (Pins 1, 2, 7, 8, 9, 11) . . . . . . . . . . . -0.3V to +6V Note: All voltages are with respect to ground, Pin 10.  
Currents are positive into the specified terminal.  
Consult Packaging Section of Databook for thermal  
limitations and considerations of packages.  
Clock Output Current (Pin 4) . . . . . . . . . . . . . . . . . . . . . . . -5mA  
Error Amplifier Output Current (Pin 3) . . . . . . . . . . . . . . . . 5mA  
Soft Start Sink Current (Pin 8) . . . . . . . . . . . . . . . . . . . . . 20mA  
BLOCK DIAGRAM  
3/97  
1

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