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RT8577AGQW
+BOMIC LED DRV RGLTR PWM 20WQFN
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ManufacturerRichtek USA Inc.
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Mfr. Part #RT8577AGQW
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Datasheet RT8577AGQW DataSheet
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Package WQFN-20
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In Stock1846
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Specifications
| Attribute | Value |
| Package | Tape & Reel (TR),Cut Tape (CT) |
| Series | Automotive, AEC-Q100 |
| ProductStatus | Active |
| Type | DC DC Regulator |
| Topology | Step-Up (Boost) |
| InternalSwitch(s) | Yes |
| NumberofOutputs | 4 |
| Voltage-Supply(Min) | 5.5V |
| Voltage-Supply(Max) | 40V |
| Current-Output/Channel | 120mA |
| Frequency | 200kHz ~ 2.1MHz |
| Dimming | PWM |
| Applications | Automotive, Backlight |
| OperatingTemperature | -40°C ~ 85°C (TA) |
| MountingType | Surface Mount |
| Package/Case | 20-WQFN Exposed Pad |
Overview
Description
Key features include a wide input voltage range, high current output capability, and various protection functions like over-voltage, over-current, and thermal shutdown, enhancing safety and reliability. The IC supports PWM dimming, providing precise control over LED brightness levels, and is designed to minimize electromagnetic interference (EMI).
The RT8577AGQW is typically housed in a compact QFN package, making it suitable for space-constrained applications. Its efficiency and ability to manage multiple LED strings make it ideal for large displays requiring consistent and vibrant backlighting. The device thus serves as a critical component in delivering high-quality visual experiences in modern electronic displays.
Equivalent
1. Texas Instruments TPS61165
2. ON Semiconductor NCP5623B
3. Maxim Integrated MAX16834
4. Analog Devices LT3476
5. Microchip Technology HV9989
Keep in mind that equivalent products should be selected based on specific application requirements like voltage, current, and features. Always consult the datasheets to ensure compatibility.
Features
Key features include:
1. High Efficiency: Optimized for minimal power loss, enhancing battery life in portable devices.
2. Current Matching: Ensures consistent brightness by providing accurate current matching for each LED string.
3. PWM Dimming: Supports pulse-width modulation dimming for adjustable brightness control.
4. Over-Voltage Protection: Safeguards against potential damage due to excessive voltage.
5. Fault Detection: Includes open and short LED string detection for improved reliability.
6. Compact Package: Available in a small QFN package, saving space in compact designs.
The RT8577AGQW is particularly suitable for LCD panel backlighting in applications like smartphones, tablets, and other portable devices. Its advanced features and reliability make it a preferred choice for designers looking to implement efficient LED driving solutions.
Pinout
Key functions of the RT8577AGQW include:
1. LED Driving: It can drive up to 8 strings of LEDs with a high degree of current matching, ensuring uniform brightness across all strings.
2. Current Regulation: The device provides accurate current regulation and can be set using external resistors, giving flexibility in different applications.
3. Fault Protection: It includes protections such as open-string, short-string, and over-temperature protection to ensure reliable operation.
4. Dimming Control: The IC supports both analog and PWM dimming, enabling smooth brightness control.
Overall, the RT8577AGQW is a versatile and robust solution for LED driving in complex backlighting systems.