For the technician, keeping a collection of Delta power supply schematics—including the ADP-160ER—is an investment in efficient, successful repairs. While finding the original document can be challenging, the topology is standard. Armed with the knowledge from this guide, you can now read any flyback schematic and revive a dead 160W adapter back to life.
On the primary side, the optocoupler’s phototransistor conducts more current, pulling the FB pin of the PWM controller low. The PWM responds by reducing the duty cycle (shortening the on-time of the MOSFET), which lowers the output voltage back to 20V. Adp-160er Schematic
The TL431 compares a fraction of the output voltage to an internal 2.5V reference. If the voltage rises above 20V, the TL431 conducts more current. This current flows through an , causing its internal LED to glow brighter. For the technician, keeping a collection of Delta
Failure Mode: If the PWM IC’s startup resistor (usually 150kΩ to 470kΩ) fails open, the IC never receives VCC and the adapter remains dead. The schematic’s center features the transformer (T1). It has a primary winding (high voltage), an auxiliary winding (powers the PWM IC after startup), and one or more secondary windings (outputs). If the voltage rises above 20V, the TL431
In the world of electronics repair, the power supply unit (PSU) is often the first component to fail. When dealing with laptops, monitors, or compact desktops, the ADP series of power adapters—manufactured by Delta Electronics—are among the most ubiquitous. One model, in particular, the ADP-160ER , is a common 160-watt AC/DC adapter used in a variety of Lenovo and other brand laptops. For technicians and advanced hobbyists, accessing the ADP-160ER schematic is not just helpful; it is essential for diagnosing failures, repairing damaged boards, and understanding the intricate switching power supply topology.