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Product Detailed Parameters
- Description：IC LED DRVR RGLTR PWM 30MA 8DFN
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：DC DC Regulator
- Topology：Step-Down (Buck)
- Internal Switch(s)：Yes
- Number of Outputs：1
- Voltage - Supply (Min)：4.5V
- Voltage - Supply (Max)：40V
- Voltage - Output：-
- Current - Output / Channel：30mA
- Frequency：2MHz
- Dimming：Analog, PWM
- Applications：Lighting, Signage
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-WDFN Exposed Pad
- Supplier Device Package：8-DFN (3x3)
- Grade：-
- Qualification：-
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Overview
The HV9918K7-G is a high-brightness LED driver IC from Microchip Technology, designed for constant current regulation in buck converter topologies. It operates with an input voltage range of 4.5 V to 40 V and supports a switching frequency of 2 MHz. The device features a single output channel capable of delivering up to 700 mA, utilizing high-side current sensing for precise control. It is housed in an 8-pin WDFN package and functions within a temperature range of -40°C to +125°C.
Feature Summary
- Integrates a high-side current sense amplifier for accurate LED current regulation without external shunt resistors.
- Supports both analog and PWM dimming methods for flexible brightness control applications.
- Includes an internal power MOSFET to simplify circuit design and reduce component count.
Applications
- General lighting systems
- Signage illumination
- Backlighting drivers
Procurement Notes
Verify the specific suffix 'K7' corresponds to the WDFN-8 tape and reel packaging configuration (3300 units) as documented by the manufacturer. Confirm that the operating environment remains within the specified -40°C to +125°C thermal limits to ensure long-term reliability. Ensure input voltage does not exceed the 40 V maximum rating during transient conditions.
Selection Notes
Select this component when a compact, single-channel solution is required for high-brightness LEDs. The integrated MOSFET and high-side sensing make it suitable for space-constrained designs. Consider the 2 MHz switching frequency for smaller passive components compared to lower-frequency alternatives. Verify compatibility with the desired dimming interface before finalizing the schematic.
Part Context
This part belongs to the HV9918 family of hysteretic buck LED drivers. It shares functional similarities with the HV9919 but differs in specific pinout or feature sets. The K7 suffix denotes the specific package type and shipping media. It is distinct from higher-current variants like the HV9967 series.
Replacement Considerations
The HV9919BK7-G is a related variant within the same product family. Verify pin-to-pin compatibility and specific current handling requirements before substitution. Cross-reference datasheets to ensure equivalent thermal performance and switching characteristics.
