Overview
The L6561D, produced by STMicroelectronics, is an improved version of the L6560 standard Power Factor Corrector (PFC). This component is designed to enhance performance in power factor correction applications, particularly in wide input voltage range scenarios. It is fully compatible with the standard L6560 version but offers superior performance with features such as micro power start-up current, very low operating supply current, and an internal start-up timer. The L6561D is realized in mixed BCD technology, providing benefits like soft output overvoltage protection and the elimination of the need for an external low-pass filter on the current sense.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Operating Supply Voltage (VCC) | 11 | 14.5 | 18 | V |
| Turn-on Threshold (VCC ON) | 11 | 12 | 13 | V |
| Turn-off Threshold (VCC OFF) | 8.7 | 9.5 | 10.3 | V |
| Hysteresis | 2.2 | 2.5 | 2.8 | V |
| Start-up Current (ISTART-U) | 20 | 50 | 90 | µA |
| Quiescent Current (Iq) | 2.6 | 4 | 5.5 | mA |
| Output Totem Pole Peak Current | - | - | ±700 | mA |
| Junction Temperature Range | -40 | - | 150 | °C |
| Storage Temperature Range | -55 | - | 150 | °C |
Key Features
- Very precise adjustable output overvoltage protection
- Micro power start-up current (50µA typical)
- Very low operating supply current (4mA typical)
- Internal start-up timer
- Current sense filter on chip
- Disable function on the ZCD pin
- 1% precision internal reference voltage at 25°C
- Transition mode operation
- Totem pole output current: ±400mA
- DIP-8 and SO-8 packages available
- Soft output overvoltage protection
- No need for external low-pass filter on the current sense
Applications
The L6561D is optimized for various applications including:
- Electronic Lamp Ballast
- AC-DC Adapters
- Switch Mode Power Supplies (SMPS)
Q & A
- What is the operating supply voltage range of the L6561D?
The operating supply voltage range is from 11V to 18V.
- What is the typical start-up current of the L6561D?
The typical start-up current is 50µA.
- What is the quiescent current of the L6561D?
The quiescent current is typically 4mA.
- What is the peak output current of the totem pole stage?
The peak output current is ±700mA.
- What are the available packages for the L6561D?
The L6561D is available in DIP-8 and SO-8 packages.
- What is the precision of the internal reference voltage at 25°C?
The internal reference voltage has a precision of 1% at 25°C.
- Does the L6561D require an external low-pass filter on the current sense?
No, the L6561D does not require an external low-pass filter on the current sense.
- What are the typical applications of the L6561D?
The L6561D is typically used in Electronic Lamp Ballast, AC-DC Adapters, and Switch Mode Power Supplies (SMPS).
- What is the junction temperature range of the L6561D?
The junction temperature range is from -40°C to 150°C.
- How does the overvoltage protection work in the L6561D?
The overvoltage protection is triggered when the output voltage exceeds a set threshold, forcing the multiplier output to decrease and switching off the external power transistor until the current falls below a certain level.
