L4985B
ActiveCONTINUOUS CONDUCTION MODE (CCM) PFC CONTROLLER WITH HIGH VOLTAGE STARTUP
Deep-Dive with AI
Search across all available documentation for this part.
L4985B
ActiveCONTINUOUS CONDUCTION MODE (CCM) PFC CONTROLLER WITH HIGH VOLTAGE STARTUP
Deep-Dive with AI
Technical Specifications
Parameters and characteristics for this part
| Specification | L4985B |
|---|---|
| Current - Startup | 400 µA |
| Frequency - Switching | 130 kHz |
| Mode | Continuous Conduction (CCM) |
| Mounting Type | Surface Mount |
| Operating Temperature [Max] | 150 °C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | 8-SOIC |
| Package / Case [x] | 0.154 in |
| Package / Case [y] | 3.9 mm |
| Supplier Device Package | 8-SO |
| Voltage - Supply [Max] | 24.5 V |
| Voltage - Supply [Min] | 10 VDC |
L4985 Series
Continuous conduction mode (CCM) PFC controller with high voltage startup
| Part | Frequency - Switching | Mode | Package / Case | Package / Case [y] | Package / Case [x] | Current - Startup | Mounting Type | Voltage - Supply [Min] | Voltage - Supply [Max] | Supplier Device Package | Operating Temperature [Max] | Operating Temperature [Min] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
STMicroelectronics | 130 kHz | Continuous Conduction (CCM) | 8-SOIC | 3.9 mm | 0.154 in | 400 µA | Surface Mount | 10 VDC | 24.5 V | 8-SO | 150 °C | -40 °C |
STMicroelectronics | 65 kHz | Continuous Conduction (CCM) | 8-SOIC | 3.9 mm | 0.154 in | 400 µA | Surface Mount | 10 VDC | 24.5 V | 8-SO | 150 °C | -40 °C |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
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.