L4985A
ActiveCONTINUOUS CONDUCTION MODE (CCM) PFC CONTROLLER WITH HIGH VOLTAGE STARTUP
L4985A
ActiveCONTINUOUS CONDUCTION MODE (CCM) PFC CONTROLLER WITH HIGH VOLTAGE STARTUP
Description
General part information
L4985 Series
The L4985 is a peak current-mode PFC controller for boost converter with a proprietary multiplier "emulator" which in addition to the innovative THD optimizers guarantee very low Total Harmonic Distortion (THD) performance in all operating conditions. The device comes in a pin SO package and offers a high performance/low-component count solution for CCM-operated boost PFC pre-regulators in EN61000-3-2 and JEIDA-MITI compliant applications, in a power range that spans from few hundred W to some kW.
The device, thanks to a proprietary off-time modulator, operates in quasi-fixed frequency in all operating conditions. Two options are available, 65 kHz for A and 130 kHz for B.
The 800V high voltage start-up block includes also the circuitry to discharge the X-capacitors of the EMI filter to a safe level. This allows the unit to meet safety regulation (such as IEC 61010-1 or IEC 62368-1) without using the traditional discharge resistor in parallel to the X-capacitors.
Technical Specifications
Parameters and characteristics for this part
| Specification | L4985A |
|---|---|
| Current - Startup | 400 µA |
| Frequency - Switching | 65 kHz |
| Mode | Continuous Conduction (CCM) |
| Mounting Type | Surface Mount |
| Operating Temperature (Max) | 150 °C |
| Operating Temperature (Min) | -40 °C |
| Package Length | 0.154 in |
| Package Name | 8-SOIC, 8-SO |
| Package Width | 3.9 mm |
| Voltage - Supply (Maximum) | 24.5 V |
| Voltage - Supply (Minimum) | 10 VDC |
Pricing
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CAD
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