UC3844A, Current Mode PWM Controller

Integrated CircuitSKU: UC3844A

Price:
$ 1.25

Description

ST Microelectronics UC3844A (8pin Dip) Switching Controller. UC3844A have UVLO thresholds of 16V (on) and 10V (off), ideally suited off-line applications The UC384xA family of control ICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include a trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockout featuring start-up current less than 0.5mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the off-stat.

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