Diode controller protects against reverse discharge
Engineered to simplify the diode emulation in order to raise the efficiency of reverse discharge protection circuitry, the DZDH0401DW controller provides the high side rail isolation necessary for reverse current blocking.
It is available from Diodes. The company explained that it emulates a diode controller for system protection against reverse discharge by driving a P-channel MOSFET, and provides the high-side rail isolation necessary for reverse current blocking, in systems up to 40V. According to Diodes, it is well-suited to OR-ing rectifiers used in the hot-swappable and N+1 redundancy power supplies used in data centre servers. Its compact size and high performance also make it suitable for use in cordless power tools and autonomous household/garden appliances (such as smart vacuum cleaners and smart lawnmowers).
Combining the DZDH0401DW with a low on-state resistance MOSFET results in reduced power dissipation, compared to Schottky diodes, particularly in high power applications, reported Diodes. This improved efficiency results in lower thermal management costs and increased system reliability. In this configuration, the DZDH0401DW detects when input power is disconnected, then drives the MOSFET into an ‘off’ state, thereby isolating any return current path and maintaining system stability.
Reverse discharge protection consists of the controller, a MOSFET and two resistors, for minimal design effort and where space is limited.
The DZDH0401DW is available from Diodes in a SOT363 package, measuring 2.15 x 2.1 x1.0mm. It is manufactured in IATF 16949 certified facilities.
Diodes specialises in semiconductors for consumer electronics, computing, communications, industrial, and automotive markets. Its product portfolio consists of discrete, analogue and mixed-signal products and packaging technology. It has
operations of 31 sites, offering engineering, testing, manufacturing, and customer service support.
