Description
HY3842/43/44/45 .
The HY3842D-N/3843D-N/3844D-N/3845D-N, are fixed frequency current mode PWM controller.
Line and DC to DC.
Features
* Low Start-Up and Operating Current High Current Totem Pole Output Under voltage Lockout With Hysteresis Operating Frequency Up To 500KHz
BLOCK DIAGRAM (toggle flip flop used only in HY3844, HY3845)
Absolute Maximum Ratings
Characteristic Supply Voltage (low
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 totem pole output ideally suited for driving a power MOSFET.