Diodes has put an array of seven 50V dmos open-drain transistors into a single IC for driving solenoids, relays, dc motors and LED displays, for example.
Called ULN62003A, the output drop is 200mV and “far lower than the bipolar devices with which it is pin-compatible”, according to the company.
This, according to the data sheet, is the typical calue with 100mA through the output transistor and Vin=5V. Maximum in this condition is 325mV, and this goes up to 700mA (typ, 1.14Vmax) at 350mA.
400mA is the maximum value through one driver at a time (500mA abs max) and all seven at once can handle 270mA at 10% duty cycle and 120mA at 50% – the latter two currents at 85°C Ta, 125°C Tj.
“In addition, the device, with its support for input voltages down to -1V, allows the GND pin to be used for detecting over-current situations,” said Diodes. “Clamping diodes are included on each of this transistor array’s outputs for improved reliability when driving inductive loads.”
The -1V is an abs max value, with 30V at the other extreme.
Delivered in an SO-16 package, the device is aimed at climate control and home appliances – washing machines, dryers, microwave ovens and air conditioning units, for example.
