Datasheet for DC1831A:
- Manufacturer Part Number : DC1831A
- Manufacturer : AD
- Description : 60V Synchronous Boost LED Controller IC
- Series : LT3762
- Reference Price : USD 0
- Our Price : We have a better price, contact us by email
- Product Type : LED Driver IC
- Function : Step-Up (Boost) LED Drivers
- Current Suggest : Production
- Status : Production
- ROHS Status : ROHS Compliant (Lead Free)
- Package Type : LT3763 Demo Board I High Power CC/CV Synchronous Buck LED Driver Controller
- Pins : -
- MFG Package Case : -
- Part Type : EVAL
- Standard Packing Type : -
- Standard Packing Quantity : -
- Working Temperature : -
- Other Part Number : DC1831A
- Shipping methods : DHL FEDEX UPS TNT
- Delivery Time : Ship within 1 day.
- Manufacturer Production time : 6-8 weeks (Normally have stocks)
- Weight : 0.001KG
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- 3000:1 External PWM Dimming
- 250:1 Internal PWM Dimming
- Wide VIN Operating Range: 2.5V to 38.5V
- Synchronous Boost Output Voltage up to 60V
- Spread-Spectrum Frequency Modulation for Lower EMI
- PMOS Switch Driver for PWM and Output Disconnect
- Constant Current (±3.5%) Regulation
- Constant Voltage (±2%) Regulation
- Rail-to-Rail LED Current Sense: 0V to 60V
- Programmable VIN Undervoltage Lockout
- Analog Dimming via Two Control Pins
- 100kHz to 1MHz Operation
- Programmable Open LED Protection with OPENLED Flag
- Short-Circuit Protection and SHORTLED Flag
- Drives LEDs in Boost, SEPIC, Buck Mode, or BuckBoost Mode Configurations
- 28 Lead TSSOP and QFN (4mm × 5mm) Exposed Pad Packages
The LT3762 is a synchronous DC/DC controller designed to operate as a constant-current source and constant-voltage regulator. It features a programmable internal PWM dimming signal generator and a synchronous gate driver. The LT3762 is ideally suited for driving high current LEDs with high efficiency and reduced power loss. Rail-to-rail switch current sensing enables synchronous boost topologies and nonsynchronous topologies such as SEPIC. A voltage feedback pin serves as the input for several LED protection features and also allows the converter to operate as a constant-voltage source.
A frequency adjust pin allows the user to program the frequency from 100kHz to 1MHz to optimize efficiency, performance and external component size. Adding a capacitor at SSFM pin activates the Spread-Spectrum Modulation feature to reduce EMI. The LT3762 also includes an integrated DC/DC converter to efficiently produce a regulated 7.5V supply for the N-channel MOSFET gate drivers. The PWM pin controls PWMTG to drive the P-channel MOSFET, allowing a high PWM dimming range (3000:1) and providing LED overcurrent protection and short-circuit protected boost capability.
Applications
- Industrial and Automotive Lighting
- Accurate Current-Limited Voltage Regulators
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
