SG2525AN Dual Switching Controllers ST original DIP16 package
Description:
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.
Features:
.8 TO 35 V OPERATION
.5.1 V REFERENCE TRIMMED TO ± 1 %
.100 Hz TO 500 KHz OSCILLATOR RANGE
.SEPARATE OSCILLATOR SYNC TERMINAL
.ADJUSTABLE DEADTIME CONTROL
.INTERNAL SOFT-START
PULSE-BY-PULSE SHUTDOWN
. INPUT UNDERVOL T AGE LOCKOUT WITH HYSTERESIS
.LATCHING PWM TO PREVENT MULT
Application:
High-speed switching
Reverse polarity protection
We focus on:
Switching diode
TVS diode
Schottky rectifier diode
Fast recovery rectifier diode
Regulator
Transistor
Mosfet
Company Introduction
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IC, Power Management IC, LED Driver IC, Mosfet Power Transistor,
Power Rectifier Diode, etc…
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Industry, Military Industry, etc…
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