ZHCSQS7H September 1994 – October 2024 UC1842A , UC1843A , UC1844A , UC1845A , UC2842A , UC2843A , UC2844A , UC2845A , UC3842A , UC3843A , UC3844A , UC3845A
PRODUCTION DATA
参数 | 测试条件 | 最小值 | 典型值 | 最大值 | 单位 | ||
---|---|---|---|---|---|---|---|
基准 | |||||||
输出电压 | TJ = 25°C、IO = 1 mA | UC184xA、UC284xA | 4.95 | 5 | 5.05 | V | |
UC384xA | 4.9 | 5 | 5.1 | ||||
线性调整 | 12 ≤ VIN ≤ 25V | 6 | 20 | mV | |||
负载调整 | 1 ≤ IO ≤ 20mA | 6 | 25 | mV | |||
温度稳定性 | 请参阅 (1)(6) | 0.2 | 0.4 | mV/°C | |||
总输出变化 | 线路、负载、温度 | UC184xA、UC284xA | 4.9 | 5.1 | V | ||
UC384xA | 4.82 | 5.18 | |||||
输出噪声电压 | 10Hz ≤ f ≤ 10kHz;TJ = 25°C(1) | 50 | µV | ||||
长期稳定性 | TA = 125°C,1000 小时(1) | 5 | 25 | mV | |||
输出短路 | -30 | -100 | -180 | mA | |||
振荡器 | |||||||
初始精度 | TJ = 25°C(5) | 47 | 52 | 57 | kHz | ||
电压稳定性 | 12 ≤ VCC ≤ 25V | 0.2% | 1% | ||||
温度稳定性 | TMIN ≤ TA ≤ TMAX(1) | 5% | |||||
振幅 | VRT/CT 峰-峰值(1) | 1.7 | V | ||||
放电电流 | TJ = 25°C,VRT/CT = 2V(7) | 7.8 | 8.3 | 8.8 | mA | ||
VRT/CT = 2V(7) | UC184xA、UC284xA | 7.5 | 8.8 | ||||
UC384xA | 7.6 | 8.8 | |||||
误差放大器 | |||||||
输入电压 | VCOMP = 2.5V | UC184xA、UC284xA | 2.45 | 2.5 | 2.55 | V | |
UC384xA | 2.42 | 2.5 | 2.58 | ||||
输入偏置电流 | -0.3 | -1 | µA | ||||
-0.3 | -2 | ||||||
AVOL | 开环增益 | 2 ≤ VO ≤ 4V | 65 | 90 | dB | ||
单位带宽增益积 | TJ = 25°C(1) | 0.7 | 1 | MHz | |||
CMRR | 共模抑制比 | 12 ≤ VCC ≤ 25V | 60 | 70 | dB | ||
输出灌电流 | VFB = 2.7V,VCOMP = 1.1V | 2 | 6 | mA | |||
输出拉电流 | VFB = 2.3V,VCOMP = 5V | -0.5 | -0.8 | mA | |||
VOUT 高 | VFB = 2.3V,RL = 15kΩ 至接地 | 5 | 6 | V | |||
VOUT 低 | VFB = 2.7V,RL = 15kΩ 至 VREF | 0.7 | 1.1 | V | |||
电流检测 | |||||||
增益 | 请参阅 (2)(3) | 2.85 | 3 | 3.15 | V/V | ||
最大输入信号 | VCOMP = 5V(2) | 0.9 | 1 | 1.1 | V | ||
PSRR | 电源抑制比 | 12 ≤ VCC ≤ 25V(2) | 70 | dB | |||
输入偏置电流 | -2 | -10 | µA | ||||
到输出延迟 | VISENSE = 0V 至 2V(1) | 150 | 300 | ns | |||
输出 | |||||||
输出低电平 | ISINK = 20mA | 0.1 | 0.4 | V | |||
ISINK = 200mA | 1.5 | 2.2 | |||||
输出高电平 | ISOURCE = 20mA | 13 | 13.5 | V | |||
ISOURCE = 200mA | 12 | 13.5 | |||||
上升时间 | TJ = 25°C,CL = 1nF(1) | 25 | 150 | ns | |||
下降时间 | TJ = 25°C,CL = 1nF(1) | 25 | 150 | ns | |||
UVLO 饱和区 | VCC = 5V,ISINK = 10mA | 0.7 | 1.2 | V | |||
欠压锁定 | |||||||
启动阈值 | UC1842A、UC1844A、UC2842A 和 UC2844A | 15 | 16 | 17 | V | ||
UC3842A 和 UC3844A | 14.5 | 16 | 17.5 | ||||
UCx843A 和 UCx845A | 7.8 | 8.4 | 9 | ||||
导通后的最小工作电压 | UC1842A、UC1844A、UC2842A 和 UC2844A | 9 | 10 | 11 | V | ||
UC3842A 和 UC3844A | 8.5 | 10 | 11.5 | ||||
UCx843A 和 UCx845A | 7 | 7.6 | 8.2 | ||||
PWM | |||||||
最大占空比 | UCx842A、UCx843A | 92% | 96% | 100% | |||
UCx844A、UCx845A | 46% | 48% | 50% | ||||
最小占空比 | 0% | ||||||
总待机电流 | |||||||
启动电流 | 0.3 | 0.5 | mA | ||||
工作电源电流 | VFB = VISENSE = 0V | 11 | 17 | mA | |||
VCC 齐纳电压 | ICC = 25mA | 30 | 39 | V |