: External programmable line voltage compensation for steady output across universal AC inputs.
Gate drive output for the external power MOSFET (clamped at 16V). Power supply input. TS Temperature compensation point setting. RN NTC resistor connection for thermal compensation.
This IC is primarily targeted at commercial and residential LED lighting solutions, including: Isolated Flyback LED drivers. Non-isolated Buck-Boost LED power supplies.
So, what kind of applications can benefit from the LZC8650C's impressive capabilities? The answer is: many. lzc8650c ic datasheet pdf
The IC includes a comprehensive suite of safety features to ensure reliability: Integrated for both VDDcap V sub cap D cap D end-sub and output voltage.
[ VCC ] ----------------> ( Internal Bias & UVLO ) | [ MULT ] ---> ( Multiplier Block ) v | [ Control Logic ] ---> [ GATE Driver ] ---> Out [ CS ] ---> ( Over-Current ) ^ | | [ INV ] ---> ( Error Amp ) -------------+ ^ [ ZCD ] ---> ( Zero Crossing Demag ) Constant Current (CC) Control Mechanism
Do you require a or buck-boost (non-isolated) topology? : External programmable line voltage compensation for steady
: Built-in LEB on the current sense input to filter signal glitches. LZC8650C Pin Configuration and Functions
. Connects to an external RC network to ground to stabilize the constant current/voltage control loop. 2 FB Input/Output
Detects demagnetization of the inductor to enable boundary conduction mode / quasi-resonant switching. Typical Application Circuit TS Temperature compensation point setting
) and helps the driver achieve strict THD compliance standards. Smart Thermal Foldback Functionality
Primary control in high-power factor LED bulbs and lighting fixtures. Primary Side Regulation (PSR):
A 400ns Leading-Edge Blanking (LEB) circuit ignores the initial current spikes caused by parasitic capacitance when the MOSFET switches on, removing the need for a secondary external RC filter on the CS pin . Troubleshooting Common Field Failures
Reliability is a major factor in commercial LED driver design. The LZC8650C integrates multiple layers of protection to safely handle unexpected circuit faults:
Place the VCC decoupling capacitor as close as possible to Pin 8 and Pin 6 (GND) to suppress high-frequency switching noise.