OBSOLETE
LC5556LD
Package:DIP8 (Pin 7 Removed)
LC5550LD series is a PWM and quasi-resonant topology non-isolated buck LED driver IC.
It incorporates separate controller and power MOSFET chips, and is designed for input capacitorless applications.
The controller adapts the average current control method for realizing high power factors.
The rich set of protection features helps to realize low component counts, and high performance-to-cost power supply.
Design Support
Related Documents
- ■Application Note
Features
-
・Buck converter operations
・Supports PWM type and Quasi-resonant type control
・Built-in ON time control circuit
・Soft start function
・Bias assist function
・Leading edge blanking function
・Built-in maximum ON time control circuit
・Protection functions
Overcurrent protection (OCP): Pulse by pulse
Overvoltage protection (OVP): Latch shutdown
Overload protection (OLP): Latch shutdown
Thermal shutdown (TSD): Latch shutdown
Application
-
・LED lighting equipment
Ceiling lights
Down lights, etc
・Led lights bulbs
Specifications
Type | |
---|---|
Circuit Type | Buck |
Isolated / Non-Isolated | Non-Isolated |
MOSFET Breakdown Voltage | 650 V |
On-Resistance | 1.90 Ω |
Output Power / Output current | 16W |
OCP | Pulse by pulse |
OLP | Latch |
OVP | Latch |
LED Open / Short Protection | NO |
Dimming Function | PWM |
Package Weight (Typ.) | 0.51 g |
Block Diagram
Pin Configuration Definitions
Physical Dimensions
Questions or Comments?
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