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SG1524 Datasheet

Regulating Pulse Width Modulator

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SG1524/SG2524/SG3524
Regulating Pulse Width Modulator
Description
This monolithic integrated circuit contains all the control
circuitry for a regulating power supply inverter or switching
regulator. Included in a 16-pin dual-in-line package is the
voltage reference, error amplifier, oscillator, pulse width
modulator, pulse steering flip-flop, dual alternating output
switches and current limiting and shut-down circuitry. This
device can be used for switching regulators of either
polarity, transformer coupled DC to DC converters,
transformerless voltage doublers and polarity converters, as
well as other power applications. The SG1524 is specified
for operation over the full military ambient temperature
range of -55°C to +125°C, the SG2524 for -25°C to +85°C,
and the SG3524 is designed for commercial applications of
0°C to +70°C.
Block Diagram
Features
8V to 40V Operation
5V Reference
Reference Line and Load Regulation of 0.4%
100Hz to 300kHz Oscillator Range
Excellent External Sync Capability
Dual 50mA Output Transistors
Current Limit Circuitry
Complete PWM Power Control Circuitry
Single Ended or Push-Pull Outputs
Total Supply Current less than 10mA
High Reliability Features
Following are the high reliability features of SG1524:
Available to MIL-STD-883, ¶ 1.2.1
MIL-M38510/12601BEA SG1524J-JAN
MSC-AMS Level “S” Processing Available
Available to DSCC - Standard Microcircuit
Drawing (SMD)
February 2015 Rev. 1.2
Figure 1 · Block Diagram
www.microsemi.com
© 2015 Microsemi Corporation
1


  Microsemi Electronic Components Datasheet  

SG1524 Datasheet

Regulating Pulse Width Modulator

No Preview Available !

Absolute Maximum Ratings (Note 1)
Input Voltage (+VIN) ............................................................. 42V
Collector Voltage ................................................................ 40V
Logic Inputs ........................................................... -0.3V to 5.5V
Current Limit Sense Inputs ................................... -0.3V to 0.3V
Output Current (each transistor) .................................... 100mA
Reference Load Current .................................................. 50mA
Note 1: Values beyond which damage may occur.
Oscillator Charging Current ................................................ 5mA
Operating Junction Temperature
Hermetic (J, L Packages) ................................................. 150°C
Plastic (N, D Packages) ................................................... 150°C
Storage Temperature Range ..............................-65°C to 150°C
Lead Temperature (Soldering, 10 seconds).....................300°C
Pb-free / RoHS Peak Package Solder Reflow Temp (40 sec. max.
exposure)... 260°C (+0, -5)
Thermal Data
J Package:
Thermal Resistance-Junction to Case, θJC ............... 30°C/W
Thermal Resistance-Junction to Ambient, θJA ........... 80°C/W
N Package:
Thermal Resistance-Junction to Case, θJC ............... 40°C/W
Thermal Resistance-Junction to Ambient, θJA ........... 65°C/W
D Package:
Thermal Resistance-Junction to Case, θJC ............... 50°C/W
Thermal Resistance-Junction to Ambient, θJA ......... 120°C/W
L Package:
Thermal Resistance-Junction to Case, θJC ........... .... 35°C/W
Thermal Resistance-Junction to Ambient, θJA ......... 120°C/W
Note A. Junction Temperature Calculation: TJ = TA + (PD x θJA).
Note B. The above numbers for θJC are maximums for the limiting
thermal resistance of the package in a standard mounting
configuration. The θJA numbers are meant to be
guidelines for the thermal performance of the device/pc-
board system. All of the above assume no ambient
airflow.
Recommended Operating Conditions (Note 2)
Input Voltage (+V ) ................................................... 8V to 40V
IN
Collector Voltage ....................................................... 0V to 40V
Error Amp Common Mode Range ..........................1.8V to 3.4V
Current Limit Sense Common Mode Range ........ -0.3V to 0.3V
Output Current (each transistor) ............................... 0 to 50mA
Reference Load Current ........................................... 0 to 20mA
Oscillator Charging Current .................................. 30µA to 2mA
Oscillator Frequency Range ......................... 100Hz to 300kHz
Oscillator Timing Resistor (RT) ........................ 1.8kto 100k
Oscillator Timing Capacitor (CT) ............................ 1nF to 1.0µF
Operating Ambient Temperature Range
SG1524 ......................................................... -55°C to 125°C
SG2524 ........................................................... -25°C to 85°C
SG3524 ............................................................... 0°C to 70°C
Note 2: Range over which the device is functional and parameter limits are guaranteed.
Electrical Characteristics
(Unless otherwise specified, these specifications apply over the operating ambient temperatures for SG1524 with -55°C TA 125°C, SG2524 with
-25°C
T
A
85°C,
SG3524
with
0°C
T
A
70°C,
and
+V
IN
=
20V.
Low duty cycle pulse testing techniques are used which maintains junction and
case temperatures equal to the ambient temperature.)
Parameter
Test Conditions
Reference Section (Note 3)
Output Voltage
Line Regulation
Load Regulation
Temperature Stability (Note 7) Total
Output Voltage Range (Note 7)
Short Circuit Current
Note 3. IL = 0mA
TJ = 25°C
VIN = 8V to 40V
IL = 0 to 20mA
Over Operating Temperature Range
Over Line, Load and Temperature
VREF = 0V
SG1524/SG2524
SG3524
Min. Typ. Max. Min. Typ. Max.
Units
4.80 5.00 5.20 4.60 5.00 5.40
20 30
50 50
50 50
4.80 5.20 4.60 5.40
25 50 150 25 50 150
V
mV
mV
mV
V
mA
2


Part Number SG1524
Description Regulating Pulse Width Modulator
Maker Microsemi
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SG1524 Datasheet PDF






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