Datasheet Texas Instruments UC3825Q — Ficha de datos

application
INFO
available UC1825
UC2825
UC3825 High Speed PWM Controller
FEATURES DESCRIPTION Compatible with Voltage or Current Mode
Topologies The UC1825 family of PWM control ICs is optimized for high frequency switched mode power supply applications. Particular care
was given to minimizing propagation delays through the comparators
Practical Operation Switching Frequencies
and logic circuitry while maximizing bandwidth and slew rate of the
to 1MHz
error amplifier. This controller is designed for use in either cur50ns Propagation Delay to Output
rent-mode or voltage mode systems with the capability for input voltage feed-forward.
High Current Dual Totem Pole Outputs
(1.5A Peak)
Protection circuitry includes a current limit comparator with a 1V
threshold, a TTL compatible shutdown port, and a soft start pin
Wide Bandwidth Error Amplifier
which will double as a maximum duty cycle clamp. The logic is fully
Fully Latched Logic with Double Pulse
latched to provide jitter free operation and prohibit multiple pulses at
Suppression
an output. An under-voltage lockout section with 800mV of hysteresis …