SG2525AN Rectifier Diode Module Dual Switching Controllers ST Original DIP16 Package
schottky barrier rectifier diode
,linear voltage regulator
SG2525AN Dual Switching Controllers ST original DIP16 package
The SG3525A series of pulse width modulator inte- grated circuits are designed to offer improved per- formance and lowered external parts count when used in designing all types of switching power sup- plies. The on-chip + 5.1 V reference is trimmed to ± 1 % and the input common-mode range of the error amplifier includes the reference voltage eliminating external resistors. A sync input to the oscillator al- lows multiple units to be slaved or a single unit to be synchronized to an external system clock. A single resistor between the CT and the discharge terminals provide a wide range of dead time ad- justment. These devices also feature built-in soft-start circuitry with only an external timing capacitor required. A shutdown terminal controls both the soft-start circu- ity and the output stages, providing instantaneous turn off through the PWM latch with pulsed shut- down, as well as soft-start recycle with longer shut- down commands. These functions are also control- led by an undervoltage lockout which keeps the out- puts off and the soft-start capacitor discharged for sub-normal input voltages. This lockout circuitry in- cludes approximately 500 mV of hysteresis for jitter- free operation. Another feature of these PWM cir- cuits is a latch following the comparator. Once a PWM pulses has been terminated for any reason, the outputs will remain off for the duration of the pe- riod. The latch is reset with each clock pulse. The output stages are totem-pole designs capable of sourcing or sinking in excess of 200 mA. The SG3525A output stage features NOR logic, giving a LOW output for an OFF state.
.5.1 V REFERENCE TRIMMED TO ± 1 %
PULSE-BY-PULSE SHUTDOWN
. INPUT UNDERVOL T AGE LOCKOUT WITH HYSTERESIS
.LATCHING PWM TO PREVENT MULT
High-speed switching
Reverse polarity protection
Switching diode
TVS diode
Schottky rectifier diode
Fast recovery rectifier diode
Regulator
Transistor
Mosfet
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