UC3823ANG4

TEXAS INSTRUMENTS  UC3823ANG4  控制器, PWM, 20V-12V电源, 1 MHz, 5.15V/200mA输出, DIP-16

The is a high speed Pulse Width Modulation PWM Controller, an improved versions of the standard UC3823 family. Performance enhancements have been made to several of the circuit blocks. Error amplifier gain bandwidth product is 12MHz, while input offset voltage is 2mV. Current limit threshold is assured to a tolerance of 5%. Oscillator discharge current is specified at 10mA for accurate dead time control. Frequency accuracy is improved to 6%. Startup supply current, typically 100µA, is ideal for off-line applications. The output drivers are redesigned to actively sink current during UVLO at no expense to the startup current specification. In addition each output is capable of 2A peak currents during transitions. Functional improvements have also been implemented in this family. The UC3825 shutdown comparator is now a high-speed overcurrent comparator with a threshold of 1.2V.

.

Programmable deadtime

.

Under-voltage lockout

.

Single pulse metering

.

Programmable soft-start

.

Wide current limit common mode range

.

TTL/CMOS Compatible logic ports

.

Symmetry correction capability

.

Guaranteed 6 unit synchronization

Device has limited built-in ESD protection, leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.