SG1525AJ - Microsemi

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

SG1525AJ
Manufacturer

Microsemi
ChipWorker Part#

CW43492264
Category

Voltage Regulator
Package

CDIP-16
Description

Voltage Mode PWM Controller 400mA 350kHz 16Pin CDIP
Documentation

Datasheet

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SG1525AJ Specifications

Attribute	Attribute Value

Part Number	SG1525AJ
Manufacturer	Microsemi
ChipWorker Part#	CW43492264
Category	Voltage Regulator
Documentation	Datasheet
Mounting Style	Through Hole
Number of Pins	16 Pin
Case/Package	CDIP-16
Supply Voltage (DC)	35.0V (max)
Number of Outputs	2 Output
Quiescent Current	14.0 mA
Rise Time	100 ns
Switching Frequency	100Hz ~ 350kHz
Duty Cycle	49 %
Maximum Duty Cycle	49 %
Fall Time	50 ns
Operating Temperature (Max)	125 ℃
Operating Temperature (Min)	-55 ℃
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Operating Temperature	-55℃ ~ 125℃ (TA)
Product Lifecycle Status	Active
Packaging	Tube
RoHS	Non-Compliant
Lead-Free Status	Lead Free
ECCN Code	EAR99

Product Description

The SG1525A/1527A series of pulse width modulator integrated circuits are designed to offer improved performance and lower external parts count when used to implement all types of switching power supplies. The on-chip +5.1 volt reference is trimmed to ±1% initial accuracy and the input common-mode range of the error amplifier includes the reference voltage, eliminating external potentiometers and divider resistors. A Sync input to the oscillator allows multiple units to be slaved together, or a single unit to be synchronized to an external system clock. A single resistor between the CT pin and the Discharge pin provides a wide range of deadtime adjustment. These devices also feature built-in soft-start circuitry with only a timing capacitor required externally. A Shutdown pin controls both the soft-start circuitry and the output stages, providing instantaneous turn-off with soft-start recycle for slow turn-on. These functions are also controlled by an undervoltage lockout which keeps the outputs off and the soft-start capacitor discharged for input voltages less than that required for normal operation. Another unique feature of these PWM circuits is a latch following the comparator. Once a PWM pulse has been terminated for any reason, the outputs will remain off for the duration of the period. The latch is reset with each clock pulse. The output stages are totem-pole designs capable of sourcing or sinking in excess of 200mA. The SG1525A output stage features NOR logic, giving a LOW output for an OFF state. The SG1527A utilizes OR logic which results in a HIGH output level when OFF.
**Key Features**:
• 8V to 35V operation
• 5.1V reference trimmed to ±1%
• 100Hz to 500KHz oscillator range
• Separate oscillator sync terminal
• Adjustable deadtime control
• Internal soft-start
• Input undervoltage lockout
• Latching P.W.M. to prevent multiple pulses
• Dual source/sink output drivers

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