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PDF JAN1526BJ Data sheet ( Hoja de datos )
| Número de pieza | JAN1526BJ | |
| Descripción | REGULATING PULSE WIDTH MODULATOR | |
| Fabricantes | Microsemi Corporation | |
| Logotipo |  |
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SG1526B/SG2526B/SG3526B
REGULATING PULSE WIDTH MODULATOR
DESCRIPTION
The SG1526B is a high-performance pulse width modulator for switching
power supplies which offers improved functional and electrical characteris-
tics over the industry-standard SG1526. A direct pin-for-pin replacement for
the earlier device with all its features, it incorporates the following enhance-
ments: a bandgap reference circuit for improved regulation and drift
characteristics, improved undervoltage lockout, lower temperature coeffi-
cients on oscillator frequency and current-sense threshold, tighter toler-
ance on softstart time, much faster SHUTDOWN response, improved
double-pulse supperession logic for higher speed operation, and an im-
proved output driver design with low shoot-through current, and faster rise
and fall times. This versatile device can be used to implement single-ended
or push-pull switching regulators of either polarity, both transformer-less
and transformer-coupled. The SG1526B is specified for operation over the
full military ambient temperature range of -55°C to 150°C. The SG2526B
is characterized for the industrial range of -25°C to 150°C, and the SG3526B
is designed for the commercial range of 0°C to 125°C.
FEATURES
• 8 to 35 volt operation
• 5V low drift 1% bandgap reference
• 1Hz to 500KHz oscillator range
• Dual 100mA source/sink
• Digital current limiting
• Double pulse suppression
• Programmable deadtime
• Improved undervoltage lockout
• Single pulse metering
• Programmable soft-start
• Wide current limit common mode range
• TTL/CMOS compatible logic ports
• Symmetry correction capability
• Guaranteed 6 unit synchronization
• Shoot thru currents less than 100mA
• Improved shutdown delay
• Improved rise and fall time
HIGH RELIABILITY FEATURES - SG1526B
♦ Available to MIL-STD-883
♦ MIL-M38510/12603BVA - JAN1526BJ
♦ Radiation data available
♦ LMI level "S" processing available
BLOCK DIAGRAM
VREF
+VIN
GROUND
RD
RT
CT
Reference
Regulator
Undervoltage
Lockout
Oscillator
To Internal
Circuitry
SYNC
+VC
OUTPUT A
RESET
CSOFTSTART
COMPENSATION
+ ERROR
— ERROR
+ C.S.
— C.S.
Soft
Start
+VIN
Amp
S
Q
D
Q
S
RQ
MEMORY
F/F
Q
T
Q
TOGGLE
F/F
METERING
F/F
OUTPUT B
SHUTDOWN
4/90 Rev 1.1 2/94
Copyright © 1994
LINFINITY Microelectronics Inc.
11861 Western Avenue ∞ Garden Grove, CA 92841
1 (714) 898-8121 ∞ FAX: (714) 893-2570
1 page  
CHARACTERISTIC CURVES (continued)
SG1526B/SG2526B/SG3526B
FIGURE 10.
STANDBY CURRENT VS. SUPPLY VOLTAGE
FIGURE 11.
OUTPUT DRIVER DEADTIME VS. CT VALUE
FIGURE 12.
OUTPUT DRIVER DEADTIME VS. RD VALUE
FIGURE 13.
SUPPLY CURRENT VS. OUTPUT FREQUENCY
FIGURE 14.
SUPPLY CURRENT VS. OUTPUT FREQUENCY
FIGURE 15.
SUPPLY CURRENT VS. OUTPUT FREQUENCY
FIGURE 16.
OSCILLATOR FREQUENCY
TEMPERATURE STABILITY
4/90 Rev 1.1 2/94
Copyright © 1994
FIGURE 17.
OUTPUT DRIVER SATURATION VOLTAGE
FIGURE 18.
SHUTDOWN INPUT TO DRIVER OUTPUT DELAY
LINFINITY Microelectronics Inc.
11861 Western Avenue ∞ Garden Grove, CA 92841
5 (714) 898-8121 ∞ FAX: (714) 893-2570
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet JAN1526BJ.PDF ] | |
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