Samples voltage or current lines to adjust internal regulation dynamically. Logic Input
— Detects overcurrent or sets peak current.
Note: Pinout functions can vary slightly depending on the specific revision of the chip, but the layout above represents the most common configuration for this class of IC. Key Features and Technical Highlights
When viewed from the , the INX IN518 features a square body layout. Most common iterations, such as the INX IN518 QFN-40 package listed on AliExpress, feature 40 connection pads tucked under the edges of the silicon body, surrounding a central thermal ground pad. inx in518 ic pinout diagram top
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switching duty cycle to maintain rigorous voltage regulation under changing loads. 5. Ground Connections ( GNDcap G cap N cap D AGNDcap A cap G cap N cap D PGNDcap P cap G cap N cap D Power Ground ( PGNDcap P cap G cap N cap D
Introduction The (often carrying the prefix INX) is a highly efficient, constant-current LED driver integrated circuit (IC) widely used in modern lighting applications . It is designed to drive high-brightness LEDs with minimal external components, making it a staple in automotive lighting, flashlight designs, and backlight modules. Samples voltage or current lines to adjust internal
| Source | Part Number | Package | Details | | :--- | :--- | :--- | :--- | | | IN518 | QFN40 | General IC for electronic projects | | UTSource | IN518-NT02 | QFN-40 | Operational amplifier; confirm with seller for exact spec | | Alibaba | 1N518 | QFN | LCD chip; check with supplier for specifics |
Route the paths between VDD, the LEDs, and ground as short and wide as possible to minimize parasitic inductance.
When substituting, always check the and Current rating . As long as the replacement diode has equal or higher ratings and fits the through-hole spacing (standard 0.1" to 0.3" spacing), the pinout remains identical (Band = Cathode). Key Features and Technical Highlights When viewed from
This logic-level input turns the IC on or off. Driving this pin high activates the driver, while pulling it low enters a low-current standby mode. Many designs apply a Pulse Width Modulation (PWM) signal to this pin to achieve smooth LED dimming.
Position the IC so that this dot is situated in the .
Below is the layout configuration for the widely used 5-pin version:
Detailed diagrams and schematic integration can be found at the following sources:
A Schottky diode is placed between the ground and the SW/OUT node (if not synchronous).