ZHCSQX4F August 1995 – August 2022 UC1823A , UC1825A , UC2823A , UC2823B , UC2825A , UC2825B , UC3823A , UC3823B , UC3825A , UC3825B
PRODUCTION DATA
| PARAMETER | TEST CONDITIIONS | MIN | TYP | MAX | UNIT | |
|---|---|---|---|---|---|---|
| PWM COMPARATOR | ||||||
| IBIAS | Bias current, RAMP | VRAMP = 0 V | –1 | –8 | μA | |
| Minimum duty cycle | 0% | |||||
| Maximum duty cycle | 85% | |||||
| tLEB | Leading edge blanking time | RLEB = 2 k?, CLEB = 470 pF | 300 | 375 | 450 | ns |
| RLEB | Leading edge blanking resistance | VCLK/LEB = 3 V | 8.5 | 10.0 | 11.5 | k? |
| VZDC | Zero dc threshold voltage, EAOUT | VRAMP = 0 V | 1.10 | 1.25 | 1.4 | V |
| tDELAY | Delay-to-output time(1) | VEAOUT = 2.1 V, VILIM = 0 V to 2 V step | 50 | 80 | ns | |
| CURRENT LIMIT / START SEQUENCE / FAULT | ||||||
| ISS | Soft-start charge current | VSS= 2.5 V | 8 | 14 | 20 | μA |
| VSS | Full soft-start threshold voltage | 4.3 | 5 | V | ||
| IDSCH | Restart discharge current | VSS= 2.5 V | 100 | 250 | 350 | μA |
| ISS | Restart threshold voltage | 0.3 | 0.5 | V | ||
| IBIAS | ILIM bias current | VILIM = 0 V to 2 V step | 15 | μA | ||
| ICL | Current limit threshold voltage | 0.95 | 1 | 1.05 | V | |
| Overcurrent threshold voltage | 1.14 | 1.2 | 1.26 | |||
| td | Delay-to-output time, ILIM(1) | VILIM = 0 V to 2 V step | 50 | 80 | ns | |
| OUTPUT | ||||||
| Low-level output saturation voltage | IOUT = 20 mA | 0.25 | 0.4 | V | ||
| IOUT = 200 mA | 1.2 | 2.2 | ||||
| High-level output saturation voltage | IOUT = -20 mA | 1.9 | 2.9 | |||
| IOUT = -200 mA | 2 | 3 | ||||
| tr, tf | Rise/fall time(1) | CL = 1 nF | 20 | 45 | ns | |
| UNDERVOLTAGE LOCKOUT (UVLO) | ||||||
| Start threshold voltage | UC2823B, UC2825B, UC3825B, UC3825B | 16 | 17 | V | ||
| UC1823A, UC1825A, UC2823A, UC2825A UC3825A, UC3825A | 8.4 | 9.2 | 9.6 | |||
| Stop threshold voltage | UC2823B, UC2825B, UC3825B, UC3825B | 9 | 10 | |||
| OVLO hysteresis | UC1823A, UC1825A, UC2823A, UC2825A UC3825A, UC3825A | 0.4 | 0.8 | 1.2 | ||
| UC2823B, UC2825B, UC3825B, UC3825B | 5 | 6 | 7 | |||
| SUPPLY CURRENT | ||||||
| Isu | Startup current | VC = VCC = VTH(start) –0.5 V | 100 | 300 | μA | |
| ICC | Input current | 28 | 36 | mA | ||