MC34063A系列是一个单片控制电路，包含
DC-DC转换器所需的主要功能。这些器件包括一个内部温度补偿基准、比较器、具有有源电流限制电路的受控占空比振荡器、驱动器和大电流输出开关。该系列专门设计用于以最少数量的外部元件集成到降压和升压以及电压反相应用中。
特征
●在3.0V至40V输入范围内工作
●低待机电流
●电流限制
●输出开关电流至1.5A
●输出电压可调
●频率操作至100kHz
●精度2%参考
●OnS
EMIMC34063A的插件替换
绝对最大额定参数
| Symbol | Parameter | Maximum | Units |
| Vcc | power Supply Voltage | 40 | Vdc |
| VIR | Comparator Input Voltage Range | -0.3 to +40 | Vdc |
| VC( switch ) | Switch Collector Voltage | 40 | Vdc |
| V E ( switch ) | Switch Emitter Voltage (VPIN1 = 40 V) | 40 | Vdc |
| V CE ( switch ) | Switch Collector to Emitter Voltage | 40 | Vdc |
| V c ( driver) | Driver Collector Voltage | 40 | Vdc |
| I C ( driver ) | Driver Collector current (Note 1) | 100 | mA |
| ISW | Switch Current | 1.5 | A |
| Tj | Operating Junction Temperature | +150 | °C |
| Ta | Operating Ambient Temperature Range | 0 to +70 | °C |
| Tstg | Storage Temperature Range | -65 to +150 | °C |
电气特性
| Characteristics | Symbol | Min | Typ | Max | Units |
| OSCILLATOR |
| Frequency (Vpin5 = 0V, CT = 1.0 nF, TA = 25℃) | fOSC | 24 | 33 | 42 | kHz |
| Charge Current(VCC = 5.0V to 40V, TA = 25℃) | Ichg | 24 | 35 | 42 | μA |
| Discharge Current (VCC = 5.0V to 40V, TA = 25℃) | Idischg | 140 | 220 | 260 | μA |
| Discharge to Charge Current Ratio (Pin 7 to Vcc, Ta = 25°C) | Idischg / Ichg | 5.2 | 6.5 | 7.5 | — |
| Current Limit Sense Voltage (Ichg = Idischg, TA = 25℃) | Vipk(sence) | 250 | 300 | 350 | mV |
| OUTPUT SWITCH (NOTE 2) |
| Saturation Voltage, Darlington Connection (ISW = 1.0 A, Pins 1, 8 connected) | VCE(sat) | — | 1.0 | 1.3 | V |
| Saturation Voltage, Darlington Connection (ISW = 1.0 A, Rpin 8 = 82: to VCC , Forced E # 20) | VCE(sat) | — | 0.45 | 0.7 | V |
| DC Current Gain (ISW = 1.0 A, VCE = 5.0 V, TA = 25℃) | hFE | 50 | 75 | — | — |
| Collector Off-State Current (VCE = 40 V) | IC(off) | — | 40 | 100 | μA |
更多详细内容请下载附件查看
MC34063A 1.5A 开关型升降压稳压电路_decrypted.pdf
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发表于 2022-5-14 11:00:01
