SG1525AJ Microsemi Analog Mixed Signal Group, SG1525AJ Datasheet - Page 6

• Manufacturer Part Number: SG1525AJ
• Description: IC PWM REGULATING SW PS 16-DIP
• Manufacturer: Microsemi Analog Mixed Signal Group

Specifications of SG1525AJ

• Pwm Type: Voltage Mode
• Number Of Outputs: 2
• Frequency - Max: 350kHz
• Duty Cycle: 49%
• Voltage - Supply: 8 V ~ 35 V
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: -55°C ~ 125°C
• Package / Case: 16-DIP
• Frequency-max: 350kHz
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption

Rev 1.4a
Copyright
APPLICATION INFORMATION
SHUTDOWN OPTIONS
1. Use an external transistor or open-collector comparator to pull
2. The same results can be accomplished by pulling down on the
SG1525A/1527A LAB TEST FIXTURE
down on the Comp terminal. This will set the PWM latch turning
off both outputs. If the shutdown signal is momentary, pulse-
by-pulse protection can be accomplished as the PWM latch will
be reset with each clock pulse.
Soft-Start terminal with the difference that on this pin, shutdown
will not affect the amplifier compensation network but must
discharge any Soft-Start capacitor.
1996
(continued)
6
3. Apply a positive-going signal to the Shutdown terminal. This
4. The shutdown terminal can be used to set the PWM latch on
will provide most rapid shutdown of the outputs but will not
immediately set the PWM latch if there is a Soft-Start capacitor.
This capacitor will discharge but with a current of approxi-
mately twice the charging current.
a pulse-by-pulse basis if there is no external capacitance on
Soft-Start terminal. Slow turn-on may still be accomplished by
applying an external capacitor, blocking diode, and charging
resistor to the comp terminal. (See SG1524 Application Note).
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