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Product Detailed Parameters
- Description：IC LED DRIVER RGLTR 3A 8SOIC
- Series：-
- Mfr：STMicroelectronics
- 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)：3V
- Voltage - Supply (Max)：18V
- Voltage - Output：-
- Current - Output / Channel：3A
- Frequency：850kHz
- Dimming：-
- Applications：Lighting, Signage
- Operating Temperature：-40°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
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Overview
The ST1CC40DR is a monolithic step-down DC-DC converter designed as a precise constant current source for LED applications. It features an adjustable output current capability up to 3 A DC and operates with a fixed switching frequency of 850 kHz. The device supports an input voltage range from 3 V to 18 V and includes embedded synchronous rectification to enhance efficiency. It utilizes peak current mode architecture with an internal compensation network. The component is housed in an 8-SOIC package and offers thermal shutdown, overcurrent protection, and an inhibit mode for low standby current consumption.
Feature Summary
- Integrated synchronous rectification with low on-resistance for enhanced efficiency
- Fixed 850 kHz switching frequency enabling minimized application size
- Inhibit mode functionality for minimizing standby current consumption
- Built-in protections against thermal overheating, overcurrent, and output short-circuit
Applications
- HB LED lighting systems
- Signage illumination
- Portable battery-powered devices requiring low standby current
Procurement Notes
Verify the specific suffix 'DR' corresponds to the SOIC-8 tape and reel packaging configuration. Confirm RoHS compliance status and ensure the operating temperature range meets the target environment requirements. Cross-reference the manufacturer datasheet for exact pinout and thermal pad specifications to avoid integration errors during PCB layout.
Selection Notes
Select this component when a compact, non-isolated buck topology is required for high-brightness LEDs. The 3 A current rating and 850 kHz frequency make it suitable for space-constrained designs. Ensure the input voltage remains within the 3 V to 18 V range and that the load current does not exceed the device's continuous rating.
Part Context
This part belongs to the ST1CC40 series of single-channel LED drivers. It is distinct from automotive-grade variants like the ALED7709. The DR suffix indicates the standard SOIC-8 surface-mount package variant, differentiating it from the QFN package versions available in the same product family.
Replacement Considerations
Direct substitutes include other parts within the ST1CC40 family, such as those in VFQFPN8 packages, provided the footprint allows. Verify compatibility with existing sensing resistor networks due to the fixed 100 mV feedback reference voltage shared across the series.
