Microchip Technology MCP1662
The MCP1662 device is a compact, space-efficient, fixed-frequency, non-synchronous step-up converter optimized to drive LED strings with constant current from a two- or three-cell alkaline or lithium Energizer®, or NiMH/NiCd, or one-cell Lithium-Ion or Li-Polymer batteries. The device integrates a 36V, 800 m low-side switch, which is protected by the 1.3A cycle-by-cycle inductor peak current limit operation. The internal feedback (VFB) voltage is set to 300 mV for low power dissipation when sensing and regulating the LED current.| Part No. | MCP1662 |
|---|---|
| Datasheet | MCP1662 Download |
| Manufacturer |  Microchip Technology |
| Description | High-Voltage Step-Up LED Driver |
| Buy | Stock & Price |
FEATURES
● 36V, 800 m Integrated Switch● Up to 92% Efficiency
● Drive LED Strings in Constant Current
● 1.3A Peak Input Current Limit: - ILED up to 200 mA @ 5.0V VIN, 4 White LEDs - ILED up to 125 mA @ 3.3V VIN, 4 White LEDs - ILED up to 100 mA @ 4.2V VIN, 8 White LEDs
● Input Voltage Range: 2.4V to 5.5V
● Feedback Voltage Reference: VFB = 300 mV
● Undervoltage Lockout (UVLO): - UVLO @ VIN Rising: 2.3V, typical - UVLO @ VIN Falling: 1.85V, typical
● Sleep Mode with 20 nA Typical Quiescent Current
● PWM Operation: 500 kHz Switching Frequency
● Cycle-by-Cycle Current Limiting
● Internal Compensation
● Open Load Protection (OLP) in the Event of: - Feedback pin shorted to GND (prevent excessive current into LEDs) - Disconnected LED string (prevent overvoltage to the converter’s Output and SW pin)
● Overtemperature Protection
● Available Packages: - 5-Lead SOT-23 - 8-Lead 2x3 TDFN
APPLICATIONS
● Two and Three-Cell Alkaline or NiMH/NiCd White LED Driver for Backlighting Products● Li-Ion B...
