| Allicdata Part #: | 497-5288-5-ND |
| Manufacturer Part#: |
E-L5991AD |
| Price: | $ 1.47 |
| Product Category: | Integrated Circuits (ICs) |
| Manufacturer: | STMicroelectronics |
| Short Description: | IC REG CTRLR FLYBACK 16SOIC |
| More Detail: | Flyback Regulator Positive, Isolation Capable Outp... |
| DataSheet: |  E-L5991AD Datasheet/PDF |
| Quantity: | 113 |
| 1 +: | $ 1.33560 |
| 10 +: | $ 1.20204 |
| 100 +: | $ 0.96617 |
| Frequency - Switching: | Up to 1MHz |
| Base Part Number: | L5991A |
| Supplier Device Package: | 16-SO |
| Package / Case: | 16-SOIC (0.154", 3.90mm Width) |
| Operating Temperature: | -40°C ~ 150°C (TJ) |
| Control Features: | Current Limit, Frequency Control, Soft Start |
| Serial Interfaces: | -- |
| Clock Sync: | No |
| Synchronous Rectifier: | Yes |
| Duty Cycle (Max): | 93% |
| Series: | -- |
| Voltage - Supply (Vcc/Vdd): | 7.6 V ~ 20 V |
| Output Phases: | 1 |
| Number of Outputs: | 1 |
| Topology: | Flyback |
| Output Configuration: | Positive, Isolation Capable |
| Function: | Step-Up/Step-Down |
| Output Type: | Transistor Driver |
| Part Status: | Obsolete |
| Packaging: | Tube |
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The E-L5991AD is a DC-DC switching controller designed for use in Power Management Integrated Circuits (PMIC). It is designed for applications where high efficiency, high voltage and high current output are desired. The device is used in multiple switching mode DC power supply applications and has an adjustable frequency control. It is capable of controlling both step-down and step-up converters, but the output voltage ripple is slightly higher than other DC-DC controllers.
The E-L5991AD provides protection against over-current, over-load, over-voltage, under-voltage, short-circuit and over temperature. It also has an adjustable frequency that can be set to prevent audible noise associated with switching mode power supplies. The device incorporates an on-board linear regulator for accurate current and voltage regulation. This feature helps to reduce system power consumption and improve EMC performance.
The basic working principle of the E-L5991AD can be summarized as follows. It uses pulse width modulation (PWM) to regulate the voltage output of a DC-DC converter. A PWM signal with a certain pulse width is used to control the on-time of the switching device, thus regulating the output voltage. The output voltage of the converter is monitored and compared with an reference voltage. The comparison is done by an internal error amplifier and a feedback loop. If the output voltage is higher than the reference voltage, the error amplifier reduces the pulse width of the PWM signal, and if the voltage is lower, the amplifier increases the pulse width. This process of adjusting the pulse width is known as PWM regulation. The feedback loop ensures that the output voltage of the converter is always kept within the acceptable range.
The E-L5991AD is suitable for various applications such as telecommunications, automotive, LED lighting and LED displays. It can be used in applications that require high efficiency, high voltage and high current outputs. It is also recommended for applications where audible noise needs to be reduced due to the adjustable frequency control. The device can be used in step-down and step-up converters, providing an effective solution for DC-DC conversion needs.
The specific data is subject to PDF, and the above content is for reference
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