This is PWM Controller.
Part Number: L2269
Function: Current Mode PWM Controller
Package: PDIP 16 Pin type
Manufacturer: Shenzhen LIZE Electronic Technology
Images:
Description
The key feature of a current mode PWM controller is its ability to sense and regulate the current flowing through the power switch, typically a transistor or a MOSFET. By continuously monitoring the current, the controller can adjust the pulse width to maintain a stable and controlled output.
L2269 is highly integrated current mode PWM control IC optimized for high performance, low standby power and cost effective offline flyblack converter applications in sub 80W range.
PWM switching frequency at normal operation is externally programmable to tight
range. At no load or light load condition, the IC operates in extended ‘burst mode’ to minimize switching loss.Lower standby power and higher conversion efficiency in thus achieved.
VDD low startup current and low operating current contribute to a reliable power
on startup design with L2269.A large value resistor could thus be used in the startup circuit to minimize the standby power.
Current mode PWM controllers offer several advantages, including better dynamic response, inherent stability, and improved ability to handle varying loads. They are commonly used in switch-mode power supplies (SMPS), motor control circuits, LED drivers, and other applications that require precise control of current or voltage.
Features
1. Proprietary frequency shuffling technology for improved EMI performance.
2. External programmable PWM switching frequency
3. Leading edge Blanking on current sense input.
4. Internal synchronized slope compensation.
5. Extended burst mode control for improved efficiency and minimum standby power design
6. Low VDD startup current and low operating current.
7. Gate output maximum voltage clamp 18V.
Pinouts
Application
1. Digital Cameras Charger
2. Power adaptor
3. Set_top box power supplies
4. Open_frame SMPS
5. Battery charger
L2269 Datasheet
