词条 | lm7812 |
释义 | lm7812是指三段稳压集成电路IC芯片元器件,适用于各种电源稳压电路,输出稳定性好、使用方便、输出过流、过热自动保护。 Electrical Characteristics 电气特性 (MC7812)(LM7812)(参照测试电路 ,0°C < TJ < 125°C, IO =500mA, VI =19V, CI=0.33ìF, CO=0.1ìF, 除非另有说明)
最小 典型 最大 Output Voltage 输出电压 VO TJ =+25℃ 11.5 12 12.5 V 5.0mA ≤ IO≤1.0A, PO≤15W VI =14.5V to 27V 11.4 12 12.6 Line Regulation 线性调整率 (Note1) Regline TJ =+25℃ VI =14.5V to 30V - 10 240 mV VI =16V to 22V - 3.0 120 Load Regulation 负载调整率 (Note1) Regload TJ =+25℃ IO =5mA to 1.5A - 11 240 mV IO =250mA to 750mA - 5.0 120 Quiescent Current 静态电流 IQ TJ =+25℃ - 5.1 8.0 mA Quiescent Current Change 静态电流变化 ΔIQ IO =5mA to 1.0A - 0.1 0.5 mA VI =14.5V to 30V - 0.5 1.0 Output Voltage Drift 输出电压漂移 ΔVO/ΔT IO =5mA - -1 - mV/℃ Output Noise Voltage 输出噪声电压 VN f =10Hz to 100KHz, TA =+25℃ - 76 - μV/Vo Ripple Rejection 纹波抑制 RR f =120Hz VI =15V to 25V 55 71 - dB Dropout Voltage 电压差 VDrop IO =1A, TJ=+25℃ - 2 - V Output Resistance 输出电阻 rO f =1KHz - 18 - mΩ Short Circuit Current 短路电流 ISC VI =35V, TA=+25℃ - 230 - mA Peak Current 峰值电流 IPK TJ =+25℃ - 2.2 - A 三端稳压集成电路极限参数: Parameter 参数 Symbol 符号 Value 单位 Input Voltage输入电压 (for VO =5V to 18V) VI 35 V (for VO =24V) VI 40 V Thermal Resistance Junction-Cases 热阻(结到壳) (TO-220) RθJC 5 ℃/W Thermal Resistance Junction-Air热阻(结到空气) (TO-220) RθJA 65 ℃/W Operating Temperature Range工作温度范围 TOPR 0 ~ +125 ℃ Storage Temperature Range储存温度范围 TSTG -65 ~ +150 ℃ |
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