Datasheets
Documents
Document Name | Size | Published | Modified | |
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SG1548 Datasheet
Key Features: • Monitors four DC voltages and the AC line • Precision 2.5V ±1% low-drift reference • Fault tolerance adjustable from ±5% to ±40% • ±3% trip threshold tolerance over temperature • Separate 10mA, 40V overvoltage, undervoltage and AC line fault outputs • Fault delay programmable with a single capacitor • 30mV comparator hysteresis to prevent oscilla-tions • On-chip inverting op amp for negative voltage • Open-collector output logic or expandability • Operation from 4.5V to 40V supply The SG1548 is an integrated circuit capable of monitoring up to four positive DC supply voltages simultaneously for overvoltage and undervoltage fault conditions. An on-chip inverting op amp also allows monitoring one negative DC voltage. The fault tolerance window is accurately programmable from ±5% to ±40% using a simple divider network on the 2.5V reference. A single external capacitor sets the fault indication delay, eliminating false outputs due to switching noise, logic transition current spikes, and short-term AC line interrup-tions. An additional comparator referenced to 2.5V allows the AC line to be monitored for undervoltage conditions or for generation of a line clock. The comparator can also be used for programmable undervoltage lockout in a switching power supply. Uncommitted collector and emitter outputs permit both inverting and non-inverting operation. External availability of the precision 2.5V reference and open-collector logic outputs permit expansion to monitor additional voltage using available open-collector quad comparators.
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401.26 kB | 11/30/-1 | 04/05/2013 | |
SG1544 Datasheet | 447.37 kB | 06/23/2015 | 06/23/2015 | |
SG1544 Datasheet | 447.37 kB | 11/30/-1 | 11/30/-1 | |
SG1543 Datasheet | 535.12 kB | 06/23/2015 | 06/23/2015 | |
sg1540 Datasheet
Key Features:
· Useable with primary and secondary side PWM
controllers
· Micropower comparator / switch
- Internal 2.5V bandgap reference
- 50mA power switch
· Squarewave oscillator
- 500Hz to 200KHz operation
- 200mA totem pole outputs
· Eliminates bulky, expensive 50/60 Hz transformer
· Minimizes high voltage bleeder current
· Programmable start-up voltage and hysteresis
· Internal and programmable overvoltage crowbar
latch
· Available in 8 pin DIP, 10 pin flat pack, and 16 pin
widebody SOIC
The SG1540 is an integrated circuit designed to efficiently provide start-up power from a high-voltage DC bus to a PWM control circuit in a switching power supply. When used on the primary side, it reduces start-up current to less than 1mA and allows any standard PWM control circuit to be used as a primary-side controller. When used to power a controller on the secondary side, it efficiently eliminates the need for a heavy 50/60Hz line transformer with its associated low frequency magnetic fields.
The circuit consists of three sections: a micropower bandgap comparator/power switch referenced to 2.5 volts which isolates the start-up capacitor from its load; a high frequency square-wave oscillator with 200mA totem-pole output for driving an isolation transformer; and a second bandgap comparator with latching crowbar to protect against overvoltage faults while starting or running.
The SG1540 is specified for operation over the full military ambient temperature range of -55°C to 125°C. The SG2540 is character-ized for the industrial range of -25°C to 85°C, and the SG3540 is designed for the commercial range of 0°C to 70°C.
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532.63 kB | 11/30/-1 | 11/30/-1 | |
SG1536 Datasheet | 439.75 kB | 11/30/-1 | 11/30/-1 | |
SG1532 Datasheet
Key Features:
• Input voltage range of 4.5V to 50V
• 2.5V low noise reference
• Independent shutdown terminal
• Improved line and load regulation
• 80mV current limit sense voltage
• Fully protected including thermal
shutdown
· Useful output current to 150mA
This monolithic integrated circuit is a versatile, general-purpose voltage regulator designed as a substantially improved replacement for the popular SG723 device. The SG1532 series regulators retain all the versatility of the SG723 but have the added benefits of operation with input voltages as low as 4.5 volts and as high as 50 volts; a low noise, low voltage reference; temperature compensated, low threshold current limiting; and protective circuits which include thermal shutdown and independent current limiting of both the reference and output voltages. A separate remote shutdown terminal is included . In the dual-in-line package an open collector output is available for low input-output differential applications.
These devices are available in both hermetic 14-pin cerdip and 10-pin TO-96 packages. In the T-package, these units are interchangeable with the LAS-1000 and LAS-1100 regulators. The SG1532 is rated for operation over the ambient temperature range of -55°C to 125°C while the SG2532 and SG3532 are intended for industrial applications of 0°C to 70°C.
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327.32 kB | 11/30/-1 | 11/30/-1 | |
SG1526B Datasheet
Key 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 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 0C to 125C.
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513.41 kB | 11/30/-1 | 04/05/2013 | |
SG1526 Datasheet
Key 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 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.
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1.58 MB | 11/30/-1 | 04/05/2013 | |
SG1525A/SG1527A Datasheet
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 Cresistor 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.
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 |
620.75 kB | 07/10/2015 | 07/10/2015 | |
SG1524B Datasheet | 621.37 kB | 11/30/-1 | 07/02/2018 | |
SG1524 Datasheet
Key Features:
• 8V to 40V operation
• 5V reference
• Reference line and load regulation of 0.4%
• Reference temperature coefficient < ± 1%
• 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
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.
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845.42 kB | 11/30/-1 | 11/30/-1 | |
SG1503, SG2503, SG2503 Datasheet
Key Features: • Output voltage trimmed to ±1% • Input voltage range of 4.5 to 40V • Temperature coefficent of 10ppm/°C • Quiescent current typically 1.5mA • Output current in excess of 10mA • Interchangeable with MC1503 and AD580 This monolithic integrated circuit is a fully self-contained precision voltage reference generator, internally trimmed for ±1% accuracy. Requiring less than 2mA in quiescent current, this device can deliver in excess of 10mA with total load- and line-induced tolerances of less than 0.5%. In additon to voltage accuracy, internal trimming achieves a temperature coefficient of output voltage of typically 10 ppm/C. As a result, these references are excellent choices for application to critical instrumentation and D-to-A converter systems. The SG1503 is specified for operation over the full military ambient temperature range of -55C to 125C , while the SG2503 is designed for -25C to 85C and the SG3503 for commercial applications of 0C to 70C.
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521.21 kB | 11/30/-1 | 01/24/2018 | |
SG143 Datasheet
Key Features:
• ±4.0V to ±40V supply voltage range
• ±37V output voltage swing
• ±24V common-mode voltages
• Overvoltage protection
• Output short circuit protection
The SG143 is a general-purpose high-voltage operational amplifier featuring operation to 40V and overvoltage protection up to 40V. Increased slew rate, together with higher common-mode and supply rejection, insure improved performance at high supply voltages. Operating characteristics are independent of supply voltage and temperature. These devices are intended for use in high voltage applications where common-mode input ranges, high output voltage swings, and low input currents are required. Also, they are internally compensated and are pin compatible with industry standard operational amplifiers.
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307.95 kB | 11/30/-1 | 11/30/-1 | |
SG140 Datasheet | 401.92 kB | 11/30/-1 | 11/30/-1 | |
SG137 SG137A Datasheet | 609.83 kB | 06/02/2015 | 06/04/2015 | |
SG120 Datasheet
Key Features:
• Output current to 1.5A
• Excellent line and load regulation
• Foldback current limiting
• Thermal overload protection
• Voltages available: -5V, -12V, -15V
•Voltages Not Recommended For New
Designs: -5.2V, -8V, -18V, -20V
• Contact factory for other voltage
options
The SG120 series of negative regulators offer self-contained, fixed-voltage capability with up to 1.5A of load current. With a variety of output voltages and four package options this regulator series is an optimum complement to the SG7800A/7800/120 line of three terminal regulators.
All protective features of thermal shutdown, current limiting, and safe-area control have been designed into these units and since these regulators require only a single output capacitor or a capacitor and 5mA minimum load for satisfactory performance, ease of application is assured.
Although designed as fixed-voltage regulators, the output voltage can be in-creased through the use of a simple voltage divider. The low quiescent drain current of the device insures good regulation when this method is used, especially for the SG120 series. Utilizing an improved Bandgap reference design, problems have been eliminated that are normally associated with the zener diode references, such as drift in output voltage and large changes in the line and load regulation
These devices are available in TO-257 (hermetically sealed TO-220), both isolated and non-isolated), TO-3, TO-39 and TO-66 power packages.
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373.93 kB | 11/30/-1 | 11/30/-1 | |
SG117HV SG117AHV Datasheet | 449.76 kB | 07/17/2013 | 07/17/2013 | |
SG117AHV SG117HV Datasheet | 449.76 kB | 07/23/2013 | 07/23/2013 | |
SG117A Datasheet
Key Features:
• 1% output voltage tolerance
• 0.01%/V line regulation
• 0.3% load regulation
• Min. 1.5A output current
• Available in hermetic TO-220
The SG117A Series are 3-terminal positive adjustable voltage regulators which offer improved performance over the original 117 design. A major feature of the SG117A is reference voltage tolerance guaranteed within ± 1%, allowing an overall power supply tolerance to be better than 3% using inexpensive 1% resistors. Line and load regulation performance has been improved as well. Additionally, the SG117A reference voltage is guaranteed not to exceed 2% when operating over the full load, line and power dissipation conditions. The SG117A adjustable regulators offer an improved solution for all positive voltage regulator requirements with load currents up to 1.5A.
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611.3 kB | 11/30/-1 | 11/30/-1 |