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PDF SG2526DW Data sheet ( Hoja de datos )
| Número de pieza | SG2526DW | |
| Descripción | REGULATING PULSE WIDTH MODULATOR | |
| Fabricantes | Microsemi Corporation | |
| Logotipo |  |
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SG1526/SG2526/SG3526
REGULATING PULSE WIDTH MODULATOR
DESCRIPTION
The SG1526 is a high performance monolithic pulse width modulator
circuit designed for fixed-frequency switching regulators and other
power control applications. Included in an 18-pin dual-in-line package
are a temperature compensated voltage reference, sawtooth oscillator,
error amplifier, pulse width modulator, pulse metering and steering logic,
and two low impedance power drivers. Also included are protective
features such as soft-start and undervoltage lockout, digital current
limiting, double pulse inhibit, a data latch for single pulse metering,
adjustable deadtime, and provision for symmetry correction inputs. For
ease of interface, all digital control ports are TTL and B-series CMOS
compatible. Active LOW logic design allows wired-OR connections for
maximum flexibility. This versatile device can be used to implement
single-ended or push-pull switching regulators of either polarity, both
transformerless and transformer coupled. The SG1526 is characterized
for operation over the full military ambient junction temperature range of
-55°C to +150°C. The SG2526 is characterized for operation from -25°C
to +150°C, and the SG3526 is characterized for operation from 0°C to
+125°C.
FEATURES
• 8 to 35 volt operation
• 5V reference trimmed to ±1%
• 1Hz to 350KHz oscillator range
• Dual 100mA source/sink outputs
• Digital current limiting
• Double pulse suppression
• Programmable deadtime
• 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
HIGH RELIABILITY FEATURES - SG1526
♦ Available to MIL-STD-883B and DESC SMD
♦ Radiation data available
♦ LMI level "S"processing available
BLOCK DIAGRAM
+VIN
GROUND
RD
RT
C
T
RESET
CSOFTSTART
COMPENSATION
+ ERROR
— ERROR
+ C.S.
— C.S.
4/90 Rev 1.1 2/94
Copyright © 1994
VREF
Reference
Regulator
Undervoltage
Lockout
Oscillator
To Internal SYNC
Circuitry
Soft
Start
+VIN
Amp
S
S
Q
D
Q
RQ
MEMORY
F/F
METERING
F/F
Q
T
Q
TOGGLE
F/F
SHUTDOWN
1
+VC
OUTPUT A
OUTPUT B
LINFINITY Microelectronics Inc.
11861 Western Avenue ∞ Garden Grove, CA 92841
(714) 898-8121 ∞ FAX: (714) 893-2570
1 page  
CHARACTERISTIC CURVES (continued)
SG1526/SG2526/SG3526
FIGURE 8.
UNDERVOLTAGE LOCKOUT CHARACTERISTIC
FIGURE 9.
ERROR AMPLIFIER OPEN LOOP GAIN
VS. FREQUENCY
FIGURE 10.
SOFTSTART TIME CONSTANT VS. CS
FIGURE 11.
CURRENT LIMIT TRANSFER FUNCTION
FIGURE 12.
COMPARATOR INPUT TO DRIVER OUTPUT DELAY
FIGURE 13.
SHUTDOWN INPUT TO DRIVER OUTPUT DELAY
FIGURE 14.
OUTPUT DRIVER SATURATION VOLTAGE VS. ISINK
FIGURE 15.
OUTPUT SUPPLY SATURATION VOLTAGE VS. ISINK
FIGURE 16.
STANDBY CURRENT VS. SUPPLY VOLTAGE
4/90 Rev 1.1 2/94
Copyright © 1994
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 SG2526DW.PDF ] | |
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