Overview
The L6562N, produced by STMicroelectronics, is a current-mode Power Factor Correction (PFC) controller operating in Transition Mode (TM). It is pin-to-pin compatible with its predecessor, the L6561, and offers improved performance. The device is realized in BCD (Bipolar-CMOS-DMOS) technology and is designed to provide high efficiency and low total harmonic distortion (THD) in PFC pre-regulators.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| IC Supply Voltage (VCC) | 10.3 | - | 22 | V |
| Start-up Current | - | - | 70 μA | - |
| Quiescent Current | - | - | 4 mA | - |
| Gate Driver Output Current | -600 | - | +800 | mA |
| Internal Reference Voltage | - | 2.5 | - | V (1% @ Tj = 25°C) |
| Output Overvoltage Protection | - | - | - | Very precise adjustable |
| Package Types | - | - | - | DIP-8, SO-8 |
Key Features
- Realized in BCD technology
- Transition-mode control of PFC pre-regulators
- Proprietary multiplier design for minimum THD of AC input current
- Very precise adjustable output overvoltage protection
- Ultra-low (≤70 μA) start-up current and low (≤4 mA) quiescent current
- Extended IC supply voltage range (10.3 V to 22 V)
- On-chip filter on current sense
- Disable function for remote ON/OFF control
- 1% (@ Tj = 25 °C) internal reference voltage
- -600/+800 mA totem pole gate driver with UVLO pull-down and voltage clamp
Applications
- PFC pre-regulators for IEC61000-3-2 compliant SMPS (up to 300W) in applications such as TVs, desktop PCs, and monitors
- High-end AC-DC adapters and chargers
- Entry-level servers and web servers
Q & A
- What is the primary function of the L6562N?
The L6562N is a current-mode Power Factor Correction (PFC) controller operating in Transition Mode (TM).
- What are the key benefits of the L6562N over its predecessor, the L6561?
The L6562N offers improved performance, including reduced THD and enhanced efficiency.
- What is the typical start-up current of the L6562N?
The start-up current is ultra-low, at ≤70 μA.
- What is the quiescent current of the L6562N?
The quiescent current is ≤4 mA.
- What are the package options available for the L6562N?
The L6562N is available in DIP-8 and SO-8 packages.
- How does the L6562N reduce THD in AC input current?
The device features a proprietary multiplier design and a special circuit that reduces conduction dead-angle near the zero-crossings of the line voltage, minimizing THD.
- What is the internal reference voltage accuracy of the L6562N?
The internal reference voltage is accurate to 1% at Tj = 25 °C.
- What is the gate driver output current capability of the L6562N?
The gate driver can source up to 600 mA and sink up to 800 mA.
- What are some common applications of the L6562N?
Common applications include PFC pre-regulators for IEC61000-3-2 compliant SMPS, high-end AC-DC adapters, and entry-level servers.
- How does the L6562N handle overvoltage protection?
The device features a very precise adjustable output overvoltage protection and a two-step OVP to safely handle overvoltages.
