Description
UMW R UMW UC2842/43/44/45 .
The 2842/43/44/45 are fixed frequency current mode PWM controller.
Line and DC to DC converter applicatio.
Features
* Pin Connection
* Low Start-Up and Operating Current
* High Current Totem Pole Output
* Undervoltage Lockout With Hysteresis
* Operating Frequency Up To 500KHz
Block diagram
(toggle flip flop used only in 2844, 2845)
V
Top view
R
T
Absolute Maximum Ratings
Symb
Applications
* with a minimal external components. Internally implemented circuits include a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totempole output ideally suited for driving a power MOSFET.
