UC2856Q - 改进的电流模式 PWM 控制器

UC2856Q是TI德州仪器公司的一款PWM与谐振控制器产品，UC2856Q是改进的电流模式 PWM 控制器，本站介绍了UC2856Q的封装应用图解、特点和优点、功能等，并给出了与UC2856Q相关的TI元器件型号供参考。

UC2856Q - 改进的电流模式 PWM 控制器 - PWM与谐振控制器 - 离线隔离型DC/DC控制器和转换器 - 德州仪器

产品描述

The UC2856 is a high performance version of the popular UC2846 series of current mode controllers, and is intended for both design upgrades and new applications where speed and accuracy are important. All input to output delays have been minimized, and the current sense output is slew rate limited to reduce noise sensitivity. Fast 1.5-A peak output stages have been added to allow rapid switching of power FETs.

A low impedance TTL compatible sync output has been implemented with a 3-state function when used as a sync input.

Internal chip grounding has been improved to minimize internal noise caused when driving large capacitive loads. This, in conjunction with the improved differential current sense amplifier, results in enhanced noise immunity.

Other features include a trimmed oscillator current (8%) for accurate frequency and dead time control; a 1 V, 5% shutdown threshold; and 4 kV minimum ESD protection on all pins.

产品特性

Pin-for-Pin Compatible With the UC2846
65-ns Typical Delay From Shutdown to Outputs and 50-ns Typical Delay From Sync to Outputs
Improved Current Sense Amplifier With Reduced Noise Sensitivity
Differential Current Sense With 3-V Common Mode Range
Trimmed Oscillator Discharge Current for Accurate Deadband Control
Accurate 1-V Shutdown Threshold
High Current Dual Totem Pole Outputs (1.5-A peak)
TTL Compatible Oscillator SYNC Pin Thresholds
4-kV ESD Protection

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