Eliminate Latching Current Limit In Power Supplies :
08/05/02 Electronic Design - Ideas for Design / Most modern
power-supply control ICs offer built-in overcurrent or
short-circuit protection. While some overcurrent-protection
schemes are latching, others are nonlatching. When the
overcurrent trip level is reached in a latching controller,
the...
Latching light detector is frugal with power and parts:
09/26/2002 EDN - Design Ideas / This idea demonstrates three
uses for the humble LED. The circuit in Figure 1a forms a simple
light detector that latches and turns on an LED when the ambient
light exceeds a preset limit determined by potentiometer P1. LED
D1 is both the indicator.
Transistors offer thermal protection for controller:
07/19/2001 EDN - Design Ideas / When a switch-mode power-supply
controller, such as On Semiconductor's NCP1200, operates at a
high ambient temperature, you should protect the entire power
supply against lethal thermal runaway. The NCP1200 operates
directly from the power mains without an auxiliary winding;
therefore, the die in the IC dissipates power ........
