RT8476AGSP Integrated Circuits (ICs) |
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Allicdata Part #: | 1028-1352-2-ND |
Manufacturer Part#: |
RT8476AGSP |
Price: | $ 0.36 |
Product Category: | Integrated Circuits (ICs) |
Manufacturer: | Richtek USA Inc. |
Short Description: | IC LED DRIVER CONTROLLER 8PSOP |
More Detail: | LED Driver IC 1 Output DC DC Regulator Step-Down (... |
DataSheet: | RT8476AGSP Datasheet/PDF |
Quantity: | 1000 |
2500 +: | $ 0.33467 |
5000 +: | $ 0.31794 |
12500 +: | $ 0.30598 |
Voltage - Output: | -- |
Supplier Device Package: | 8-SOP-EP |
Package / Case: | 8-SOIC (0.154", 3.90mm Width) Exposed Pad |
Mounting Type: | Surface Mount |
Operating Temperature: | -40°C ~ 85°C (TA) |
Applications: | Automotive, Lighting, Signage |
Dimming: | Analog, PWM |
Frequency: | -- |
Current - Output / Channel: | -- |
Series: | -- |
Voltage - Supply (Max): | 40V |
Voltage - Supply (Min): | 4.5V |
Number of Outputs: | 1 |
Internal Switch(s): | No |
Topology: | Step-Down (Buck), Step-Up (Boost) |
Type: | DC DC Regulator |
Part Status: | Active |
Packaging: | Tape & Reel (TR) |
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RT8476AGSP is a high performance lighting solutions device from Richtek Technology Corporation. It is classified as a PMIC - LED Drivers device, with the salient features including Low-Noise Operation, Low Quiescent Current, Up to 2 MHz PWM Frequency, Low Voltage operation and Precise Brightness Control.
As for the Application Field, RT8476AGSP is widely used in elevators, machines, pipes and related power consuming applications. It is applicable to brighten up neon tubes, low voltage tube lamps and high voltage fan lighting. It is also perfectly fit for illuminating the LCD backlight and the pointer of the gauge.
RT8476AGSP is built with an optimal architecture to achieve a high efficiency and low power dissipation operation. Its well-known low noise operation allows an optimized noise immunity performance. It also provides low quiescent current, up to 2 MHz PWM frequency, low voltage operation and precise brightness control. By adopting a low voltage high current reference cell, it helps lowering the cost and thermal burden.
As for the Working Principle, RT8476AGSP has two main operation modes: linear operation and PWM operation mode. In linear operation mode, it adjusts the output current in accordance with the current reference. It is suitable for dimming control and interfacing with microcontroller. In PWM operation mode, the internal PWM circuit modulates the average output current. It helps limit the output current at a high level but the response time is slow. It is applicable to dimming control in the low brightness range.
The PWM circuit of RT8476AGSP consists of Comparator, Timer, Oscillator, Counter and Charge Pump. The Comparator senses the sensed current and compares the sensed current with a pre-set level to generate an enable signal for the output stage. The Timer is used to control the output stage by controlling the switching period. The Oscillator, Counter and Charge Pump form the circuit for generating the pre-set level, which governs the upper limit of average output current. The output stage includes a MOSFET and a current sensing circuit together with the timing circuit for controlling the output current.
To sum up, RT8476AGSP is a PMIC - LED Drivers device from Richtek Technology Corporation, which is applicable to brighten up neon tubes, low voltage tube lamps and high voltage fan lighting. It provides optimal architecture to achieve a high efficiency and low power dissipation operation, featuring low-noise operation, low quiescent current, up to 2 MHz PWM frequency, low voltage operation and precise brightness control. It has two main operation modes: linear operation and PWM operation mode. In linear operation mode, it adjusts the output current in accordance with the current reference. In PWM operation mode, the internal PWM circuit modulates the average output current. The PWM circuit of RT8476AGSP consists of Analyzer, Timer, Oscillator, Counter and Charge Pump components, of which the output stage includes a MOSFET and a current sensing circuit together with the timing circuit for controlling the output current.
The specific data is subject to PDF, and the above content is for reference
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