IC698CRE020工控模块前置控制器
典型性能特性
4 LT1370 sn1370 1370fs典型性能特性W U开关频率与反馈引脚电压（V）–1输入电流（µA）1 7 LT1370•G07–1–3 0 2–2–4 0 1 2 3 4 5 6反馈引脚电压占空比（%）6.6开关电流限制（A）7.4 7.2 7.8 8.2 7.0 6.8 8.0 20 40 60 80 LT1370•G02 0 10 30 50 70 90 100开关电流限制与占空比开关电流（A）0开关电压（mV）300 400 550 5 LT1370·G01 200 100 250 350 500 50 0 1 2 3 4 6 125°C 75°C 25°C 0°C温度（°C）–50 1.8输入电压（V）2.0 2.2 2.6 0 50 100 150 LT1370？G03 2.8 3.0–2525 75 125最小输入电压vs温度温度（°C）–50 0关机延迟（µs）关机阈值（V）2 6 8 10 20 14 0 50 75 LT1370•G04 4 16 18 12 0 0.2 0.6 0.8 1.0 2.0 0.4 1.6 1.8 1.2–25 100 125 150关机阈值关机延迟和阈值vs温度误差放大器输出电流vs反馈引脚电压反馈引脚电压（V）400误差放大器输出电流
VC高箝压VC阈值引脚功能U UU VC：补偿引脚用于频率补偿、电流限制和软启动。它是误差放大器的输出和电流比较器的输入。环路频率补偿可以通过从VC引脚接地的RC网络来执行。请参阅应用程序信息。FB：反馈引脚用于正输出电压感测和振荡器频率偏移。它是误差放大器的反相输入。该放大器的非反相输入端内部连接到1.245V参考电压。NFB：负反馈引脚用于负输出电压感测。它通过100k源电阻器连接到负反馈放大器的反相输入端。S/S：停机和同步引脚。S/S引脚与逻辑电平兼容。关机处于低电平，关机阈值通常为1.3V。对于正常操作
Typical performance characteristics
4 LT1370 sn1370 1370fs Typical performance characteristics W U Switch frequency and feedback pin voltage (V) – 1 Input current (µ A) 1 7 LT1370 • G07 – 1 – 3 0 2 – 2 – 4 0 1 2 3 5 6 Feedback pin voltage duty cycle (%) 6.6 Switch current limit (A) 7.4 7.2 7.8 8.2 7.0 6.8 8.0 20 60 LT1370 • G02 0 30 50 70 100 Switch current limit and duty cycle Switch current (A) 0 Switch voltage (mV) 300 400 550 5 LT1370 · G01 200 100 250 350 500 50 0 1 2 3 4 6 125 ° C 75 ° C 25 ° C 0 ° C Temperature (° C) – 50 1.8 Input voltage (V) 2.0 2.2 0 50 100 150 LT1370? G03 2.8 3.0 – 2525 75 125 Minimum input voltage vs temperature (° C) – 50 0 Shutdown delay (µ s) Shutdown threshold (V) 2 6 8 10 20 14 0 50 75 LT1370 • G04 4 16 18 12 0 0.2 0.6 0.8 1.0 2.0 0.4 1.6 1.2 – 25 100 125 150 Shutdown threshold Shutdown delay and threshold vs temperature error amplifier output current vs feedback pin voltage Feedback pin voltage (V) 400 Error amplifier output current
VC high clamp VC threshold pin function U UU VC: compensation pin is used for frequency compensation, current limitation and soft start. It is the output of the error amplifier and the input of the current comparator. Loop frequency compensation can be performed by an RC network grounded from the VC pin. See application information. FB: feedback pin is used for positive output voltage sensing and oscillator frequency offset. It is the inverse input of the error amplifier. The non inverting input of the amplifier is internally connected to a 1.245V reference voltage. NFB: negative feedback pin is used for negative output voltage sensing. It is connected to the inverting input of the negative feedback amplifier through a 100k source resistor. S/S: Shutdown and synchronization pin. The S/S pin is compatible with the logic level. The shutdown is at low level, and the shutdown threshold is usually 1.3V. For normal operation
