ZHCSR78I July 2000 – June 2024 UCC28C40 , UCC28C41 , UCC28C42 , UCC28C43 , UCC28C44 , UCC28C45 , UCC38C40 , UCC38C41 , UCC38C42 , UCC38C43 , UCC38C44 , UCC38C45
PRODUCTION DATA
请参考 PDF 数据表获取器件具体的封装图。
参数 | 测试条件 | 最小值 | 典型值 | 最大值 | 单位 | |
---|---|---|---|---|---|---|
基准 | ||||||
VVREF | VREF 电压,初始精度 | TJ = 25°C,IOUT = 1mA | 4.9 | 5 | 5.1 | V |
线性调节 | VVDD = 12V 至 18V | 0.2 | 20 | mV | ||
负载调整率 | 1mA 至 20mA | 3 | 25 | mV | ||
温度稳定性 | 请参阅(2) | 0.2 | 0.4 | mV/°C | ||
总输出变化 | 请参阅(2) | 4.82 | 5.18 | V | ||
VREF 噪声电压 | 10Hz 至 10kHz,TJ = 25°C,请参阅(2) | 50 | µV | |||
长期稳定性 | 1000 小时,TJ = 125°C,请参阅(2) | 5 | 25 | mV | ||
IVREF | 输出短路(拉电流) | 30 | 45 | 55 | mA | |
振荡器 | ||||||
fOSC | 初始精度 | TJ = 25°C,请参阅(3) | 50.5 | 53 | 55 | kHz |
电压稳定性 | 12V ≤ VVDD ≤ 18V | 0.2% | 1% | |||
温度稳定性 | TJ(MIN) 至 TJ(MAX),请参阅(2) | 1% | 2.5% | |||
振幅 | RT/CT 引脚峰峰值电压 | 1.9 | V | |||
放电电流 | TJ = 25°C,VRT/CT = 2V,请参阅(4) | 7.7 | 8.4 | 9 | mA | |
VRT/CT = 2V,请参阅(4) | 7.2 | 8.4 | 9.5 | |||
误差放大器 | ||||||
VFB | 反馈输入电压,初始精度 | VCOMP = 2.5V,TJ = 25°C | 2.475 | 2.5 | 2.525 | V |
反馈输入电压,总变化 | VCOMP = 2.5V | 2.45 | 2.5 | 2.55 | V | |
IFB | 输入偏置电流(拉电流) | VFB = 5V | 0.1 | 2 | µA | |
AVOL | 开环电压增益 | 2V ≤ VOUT ≤ 4V | 65 | 90 | dB | |
单位带宽增益积 | 请参阅(2) | 1 | 1.5 | MHz | ||
PSRR | 电源抑制比 | 12V ≤ VVDD ≤ 18V | 60 | dB | ||
输出灌电流 | VFB = 2.7V,VCOMP = 1.1V | 2 | 14 | mA | ||
输出拉电流 | VFB = 2.3V,VCOMP = 5V | 0.5 | 1 | mA | ||
输出拉电流(2) | VFB ≤ 2.3V,VCOMP = 0V | 5.5 | mA | |||
VOH | 高电平 COMP 电压 | VFB = 2.3V,RCOMP = 15kΩ COMP 到 GND | VREF - 0.2 | V | ||
VOL | 低电平 COMP 电压 | VFB = 2.7V,RCOMP = 15kΩ COMP 到 VREF | 0.1 | 1.1 | V | |
电流检测 | ||||||
ACS | 增益 | 请参阅 (5)(6) | 2.85 | 3 | 3.15 | V/V |
VCS | 最大输入信号 | VFB < 2.4V | 0.9 | 1 | 1.1 | V |
PSRR | 电源抑制比 | VVDD = 12V 至 18V(2)(5) | 70 | dB | ||
ICS | 输入偏置电流(拉电流) | 0.1 | 2 | µA | ||
tD | CS 至输出延迟 | 35 | 70 | ns | ||
COMP 至 CS 失调电压 | VCS = 0V | 1.15 | V | |||
输出 | ||||||
VOUT(low) | RDS(on) 下拉 | ISINK = 200mA | 5.5 | 15 | Ω | |
VOUT(high) | RDS(on) 上拉 | ISOURCE = 200mA | 10 | 25 | Ω | |
tRISE | 上升时间 | TJ = 25°C,COUT = 1nF | 25 | 50 | ns | |
tFALL | 下降时间 | TJ = 25°C,COUT = 1nF | 20 | 40 | ns | |
欠压锁定 | ||||||
VDDON | 启动阈值 | UCCx8C42、UCCx8C44 | 13.5 | 14.5 | 15.5 | V |
UCCx8C43、UCCx8C45 | 7.8 | 8.4 | 9 | |||
UCCx8C40、UCCx8C41 | 6.5 | 7 | 7.5 | |||
VDDOFF | 最小工作电压 | UCCx8C42、UCCx8C44 | 8 | 9 | 10 | V |
UCCx8C43、UCCx8C45 | 7 | 7.6 | 8.2 | |||
UCCx8C40、UCCx8C41 | 6.1 | 6.6 | 7.1 | |||
PWM | ||||||
DMAX | 最大占空比 | UCCx8C42、UCCx8C43、UCCx8C40,VFB < 2.4V | 94% | 96% | ||
UCCx8C44、UCCx8C45、UCCx8C41,VFB < 2.4V | 47% | 48% | ||||
DMIN | 最小占空比 | VFB > 2.6V | 0% | |||
电源电流 | ||||||
ISTART-UP | 启动电流 | VVDD = VDDON – 0.5V | 50 | 100 | µA | |
IVDD | 工作电源电流 | VFB = VCS = 0V | 2.3 | 3 | mA |