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UC3878DWP PDF预览

UC3878DWP

更新时间： 2024-11-21 04:27:07
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光电二极管
页数 文件大小 规格书
19页 740K
描述
Phase Shift Resonant Controller

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中文翻译

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UC3878DWP 技术参数

是否Rohs认证：不符合生命周期：Obsolete
零件包装代码：SOIC包装说明：PLASTIC, SOIC-28
针数：28Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.92Is Samacsys：N
其他特性：CAN ALSO BE CONFIGURED IN CURRENT MODE模拟集成电路 - 其他类型：SWITCHING CONTROLLER
控制模式：VOLTAGE-MODE控制技术：RESONANT CONTROL
最大输入电压：20 V最小输入电压：11 V
标称输入电压：12 VJESD-30 代码：R-PDSO-G28
JESD-609代码：e0长度：17.9 mm
湿度敏感等级：2功能数量：1
端子数量：28最高工作温度：70 °C
最低工作温度：最大输出电流：3 A
封装主体材料：PLASTIC/EPOXY封装代码：HSOP
封装等效代码：SOP28,.4封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, HEAT SINK/SLUG峰值回流温度（摄氏度）：220
认证状态：Not Qualified座面最大高度：2.65 mm
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：PHASE-SHIFT最大切换频率：2000 kHz
技术：BIPOLAR温度等级：COMMERCIAL
端子面层：TIN LEAD端子形式：GULL WING
端子节距：1.27 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：7.5 mm
Base Number Matches：1

UC3878DWP 数据手册

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application  
INFO  
UC1875/6/7/8  
UC2875/6/7/8  
UC3875/6/7/8  
available  
Phase Shift Resonant Controller  
FEATURES  
DESCRIPTION  
• Zero to 100% Duty Cycle Control  
The UC1875 family of integrated circuits implements control of a bridge  
power stage by phase-shifting the switching of one half-bridge with respect  
to the other, allowing constant frequency pulse-width modulation in combi-  
nation with resonant, zero-voltage switching for high efficiency performance  
at high frequencies. This family of circuits may be configured to provide  
control in either voltage or current mode operation, with a separate  
over-current shutdown for fast fault protection.  
• Programmable Output Turn-On Delay  
• Compatible with Voltage or Current  
Mode Topologies  
• Practical Operation at Switching  
Frequencies to 1MHz  
A programmable time delay is provided to insert a dead-time at the turn-on  
of each output stage. This delay, providing time to allow the resonant  
switching action, is independently controllable for each output pair (A-B,  
C-D).  
• Four 2A Totem Pole Outputs  
• 10MHz Error Amplifier  
• Undervoltage Lockout  
With the oscillator capable of operation at frequencies in excess of 2MHz,  
overall switching frequencies to 1MHz are practical. In addition to the stan-  
dard free running mode, with the CLOCKSYNC pin, the user may configure  
these devices to accept an external clock synchronization signal, or may  
lock together up to 5 units with the operational frequency determined by  
the fastest device.  
• Low Startup Current –150µA  
• Outputs Active Low During UVLO  
• Soft-Start Control  
• Latched Over-Current Comparator  
With Full Cycle Restart  
Protective features include an undervoltage lockout which maintains all out-  
puts in an active-low state until the supply reaches a 10.75V threshold.  
1.5V hysteresis is built in for reliable, boot-strapped chip supply.  
Over-current protection is provided, and will latch the outputs in the OFF  
state within 70nsec of a fault. The current-fault circuitry implements  
• Trimmed Reference  
full-cycle restart operation.  
(continued)  
BLOCK DIAGRAM  
UDG-95073  
SLUS229B - JULY 1999 - REVISED JUNE 2004  
1234567...19

中文翻译

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