ZHCSLA9H April 1997 – October 2024 UC1842 , UC1843 , UC1844 , UC1845 , UC2842 , UC2843 , UC2844 , UC2845 , UC3842 , UC3843 , UC3844 , UC3845
PRODUCTION DATA
参数 | 测试条件 | 最小值 | 典型值 | 最大值 | 单位 | ||
---|---|---|---|---|---|---|---|
基准部分 | |||||||
VVREF | 基准电压 | IVREF = 1mA,TJ = 25°C | UC184x 和 UC284x | 4.95 | 5 | 5.05 | V |
UC384x | 4.9 | 5 | 5.1 | ||||
线路调整率 | 12V ≤ VCC ≤ 25V | 6 | 20 | mV | |||
负载调整率 | 1 ≤ IVREF ≤ 20mA | 6 | 25 | mV | |||
温度稳定性 | 请参阅 (1)(3) | 0.2 | 0.4 | mV/°C | |||
总输出变化 | 线路、负载、温度 (1) | UC184x 和 UC284x | 4.9 | 5.1 | V | ||
UC384x | 4.82 | 5.18 | |||||
输出噪声电压 | 10Hz ≤ fOSC ≤ 10kHz,(1) TJ = 25°C | 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 | |||
振荡器部分 | |||||||
fOSC | 初始精度 | TJ = 25°C(5) | 47 | 52 | 57 | kHz | |
电压稳定性 | 12V ≤ VCC ≤ 25V | 0.2% | 1% | ||||
温度稳定性 | TMIN ≤ TA ≤ TMAX (1) | 5% | |||||
VRT/CT | 振幅 | 峰峰值 (1) | 1.7 | V | |||
误差放大器部分 | |||||||
VVFB | 输入电压 | VCOMP = 2.5V | UC184x 和 UC284x | 2.45 | 2.5 | 2.55 | V |
UC384x | 2.42 | 2.5 | 2.58 | ||||
IVFB | 输入偏置电流 | UC184x 和 UC284x | -1 | µA | |||
UC384x | -2 | ||||||
AVOL | 2V ≤ VCOMP ≤ 4V | 65 | 90 | dB | |||
单位带宽增益积 | TJ = 25°C (1) | 0.7 | 1 | MHz | |||
PSRR | 电源抑制比 | 12V ≤ VCC ≤ 25V | 60 | 70 | dB | ||
I(snk) | COMP 灌电流 | VVFB = 2.7V,VCOMP = 1.1V | 2 | 6 | mA | ||
I(src) | COMP 源电流 | VVFB = 2.3V,VCOMP = 5V | -0.5 | -0.8 | |||
VCOMP 高 | 高电平输出电压 | VVFB = 2.3V,RL = 15kΩ COMP 至 GROUND | 5 | 6 | V | ||
VCOMP 低 | 低电平输出电压 | VVFB = 2.7V,RL = 15kΩ COMP 至 VREF | 0.7 | 1.1 | |||
电流检测部分 | |||||||
ACS | 增益 | 请参阅 (4)(6) | 2.85 | 3 | 3.15 | V/V | |
VISENSE | 最大输入信号 | VCOMP = 5V (4) | 0.9 | 1 | 1.1 | V | |
PSRR | 电源抑制比 | 12V ≤ VVCC ≤ 25V (1) (4) | 70 | dB | |||
IISENSE | 输入偏置电流 | -2 | -10 | µA | |||
tDLY | 到输出延迟 | VISENSE 从 0V 跃升至 2V (1) | 150 | 300 | ns | ||
输出部分 | |||||||
VOUT 低 | 低电平 OUTPUT 电压 | ISINK = 20mA | 0.1 | 0.4 | V | ||
ISINK = 200mA | 1.5 | 2.2 | |||||
VOUT 高 | 高电平 OUTPUT 电压 | ISOURCE = 20mA | 13 | 13.5 | V | ||
ISOURCE = 200mA | 12 | 13.5 | |||||
tRISE | 上升时间 (1) | COUTPUT = 1nF,TJ = 25°C | 25 | 150 | ns | ||
tFALL | 下降时间 (1) | COUTPUT = 1nF,TJ = 25°C, | 25 | 150 | ns | ||
欠压锁定 (UVLO) | |||||||
VCCON | 启用阈值 | UC1842/4 和 UC2842/4 | 15 | 16 | 17 | V | |
UC3842/4 | 14.5 | 16 | 17.5 | ||||
UCx843/5 | 7.8 | 8.4 | 9 | ||||
VCCOFF | UVLO 关断阈值 | UC1842/4 和 UC2842/4 | 9 | 10 | 11 | V | |
UC3842/4 | 8.5 | 10 | 11.5 | ||||
UCx843/5 | 7 | 7.6 | 8.2 | ||||
PWM | |||||||
DMAX | 最大占空比 | UCx842/3 | 92% | 97% | 100% | ||
UC1844/5 和 UC2844/5 | 46% | 48% | 50% | ||||
UC3844/5 | 47% | 48% | 50% | ||||
DMIN | 最小占空比 | 0% | |||||
总待机电流 | |||||||
IVCC | 启动电流 | 0.5 | 1 | mA | |||
IVCC | 工作电源电流 | VVFB = VISENSE= 0V | 11 | 17 | |||
VCC 齐纳电压 | IVCC = 25mA | 30 | 39 | V |