图1 LM7824外形引脚排列图管脚图
图2 78XX内部电路图
图3 78XX参照测试电路
Electrical Characteristics 电气特性 (MC7824)LM7824
(参照测试电路 ,0°C < TJ < 125°C, IO =500mA, VI =33V, CI=0.33ìF, CO=0.1ìF, 除非另有说明)
Parameter 参数
| Symbol 符号
| Conditions 条件
| MC7824 LM7824
| 单位
| |||
最小
| 典型
| 最大
| |||||
Output Voltage 输出电压
| VO
| TJ =+25℃
| 23
| 24
| 25
| V
| |
5.0mA ≤ IO ≤ 1.0A, PO ≤ 15W VI =27V to 38V
| 22.8
| 24
| 25.25
| ||||
Line Regulation 线性调整率 (Note1)
| Regline
| TJ =+25℃
| VI =27V to 38V
| -
| 17
| 480
| mV
|
VI =30V to 36V
| -
| 6
| 240
| ||||
Load Regulation 负载调整率 (Note1)
| Regload
| TJ =+25℃
| IO =5mA to 1.5A
| -
| 15
| 480
| mV
|
IO =250mA to 750mA
| -
| 5.0
| 240
| ||||
Quiescent Current 静态电流
| IQ
| TJ =+25℃
| -
| 5.2
| 8.0
| mA
| |
Quiescent Current Change 静态电流变化
| ΔIQ
| IO =5mA to 1.0A
| -
| 0.1
| 0.5
| mA
| |
VI =27V to 38V
| -
| 0.5
| 1
| ||||
Output Voltage Drift 输出电压漂移
| ΔVO/ΔT
| IO =5mA
| -
| -1.5
| -
| mV/℃
| |
Output Noise Voltage 输出噪声电压
| VN
| f =10Hz to 100KHz, TA =+25℃
| -
| 60
| -
| μV/Vo
| |
Ripple Rejection 纹波抑制
| RR
| f =120Hz VI =28V to 38V
| 50
| 67
| -
| dB
| |
Dropout Voltage 电压差
| VDrop
| IO =1A, TJ=+25℃
| -
| 2
| -
| V
| |
Output Resistance 输出电阻
| rO
| f =1KHz
| -
| 28
| -
| 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
|
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
| ℃
|
图4 纹波抑制电路
图5 负载调节控制电路
图6 与79XX系列三端稳压构成的正负对称输出电压电路图
图7 典型应用电路图
图8 TO-220封装图片
图9 D-PAK封装图
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