Working inside a single power conversion stage, the internal multi-plier module monitors continuous current feedback relative to the line input. This enables high efficiency (
Minimum 6KV threshold, relying on metal oxide varistors (MOV 10D621) alongside ultra-fast transient voltage recovery diodes (ES2J). Integrated Fault Protections Output Open-Circuit / Over-Voltage ( VOUTcap V sub cap O cap U cap T end-sub
Built-in over-voltage (OVP), short-circuit, and over-temperature protection (OTP). đź“Ť Pinout Configuration (8-Pin SOP) lzc8650c ic datasheet pdf
: The CS pin continuously limits the maximum peak current flowing through the power MOSFET, preventing transformer saturation.
Loop compensation pin. An external RC network is connected here to stabilize the control loop. MULT Working inside a single power conversion stage, the
[ AC Input: 85-300Vac ] ---> [ Bridge Rectifier / Pi-Filter ] | +-----+-----+ | | [Auxiliary Winding] [Primary Transformer Winding] | | [ LZC8650C Controller ] | [ External MOSFET (e.g., 8N70) ] - Pin 2 (FB) <-----------------+ | - Pin 5 (DRV) ---------------------------->+ - Pin 3 (CS) <-----------------------------+---> [ Sense Resistor ] ---> GND Typical Bill of Materials (BOM) Examples: 8N70 TO-220F Power MOSFET Surge Immunity: ≥is greater than or equal to 6 KV protection using high-capacity Varistors (MOV 10D621)
: The current sense (CS) pin features an integrated 400ns LEB time . This blanking period ignores the high-frequency parasitic current spike induced when the external MOSFET switches on, removing the requirement for external RC filtering components on the sensing pin. Comprehensive Protection Implementations đź“Ť Pinout Configuration (8-Pin SOP) : The CS
Crucial for wide-input range designs (e.g., 90V AC to 265V AC).
The LZC8650C regulates output current by analyzing the peak primary-side current detected via the CS pin (Pin 4) and the demagnetization time detected via the ZCD pin (Pin 5). The internal DSP engine calculates the exact output current dynamically, keeping the LED brightness stable regardless of fluctuations in the input mains voltage. 3. High Power Factor Mechanism
depending on external resistor tuning), the controller systematically reduces output current at a rate of roughly . This balances safety while preventing total light failure in street lights or industrial bays. 3. Comprehensive Protection Suite