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SG3846DW

Description
Switching Controller, Current-mode, 0.5A, 500kHz Switching Freq-Max, BIPolar, PDSO16, PLASTIC, SOIC-16
CategoryPower/power management    The power supply circuit   
File Size210KB,10 Pages
ManufacturerLinfinity Microelectronics
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SG3846DW Overview

Switching Controller, Current-mode, 0.5A, 500kHz Switching Freq-Max, BIPolar, PDSO16, PLASTIC, SOIC-16

SG3846DW Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerLinfinity Microelectronics
package instructionPLASTIC, SOIC-16
Reach Compliance Codeunknown
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage40 V
Minimum input voltage8 V
Nominal input voltage15 V
JESD-30 codeR-PDSO-G16
JESD-609 codee0
Number of functions1
Number of terminals16
Maximum operating temperature70 °C
Minimum operating temperature
Maximum output current0.5 A
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOP16,.4
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Certification statusNot Qualified
surface mountYES
Switch configurationPUSH-PULL
Maximum switching frequency500 kHz
technologyBIPOLAR
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
SG1846/SG2846/SG3846
CURRENT MODE PWM CONTROLLER
DESCRIPTION
The SG1846 family of control ICs provides all of the necessary
features to implement fixed frequency, current mode control
schemes while maintaining a minimum external parts count. The
superior performance of this technique can be measured in im-
proved line regulation, enhanced load response characteristics,
and a simpler, easier-to-design control loop. Topological advan-
tages include inherent pulse-by-pulse current limiting capability,
automatic symmetry correction for push-pull converters, and the
ability to parallel “power modules” while maintaining equal current
sharing.
Protection circuitry includes built-in under-voltage lockout and
programmable current limit in addition to soft start capability. A
shutdown function is also available which can initiate either a
complete shutdown with automatic restart or latch the supply off.
Other features include fully latched operation, double pulse sup-
pression, deadtime adjust capability, and a ±1% trimmed bandgap
reference.
FEATURES
Automatic feed forward compensation
Programmable pulse by pulse current limiting
Automatic symmetry correction in push-pull
configuration
Enhanced load response characteristics
Parallel operation capability for modular power
systems
Differential current sense amplifier with wide
common mode range
Double pulse suppression
200mA totem-pole outputs
± 1% bandgap reference
Under-voltage lockout
Soft-start capability
Shutdown capability
500KHz operation
HIGH RELIABILITY FEATURES - SG1846
Available to MIL-STD - 883
Radiation data available
LMI level "S" processing available
BLOCK DIAGRAM
4/90 Rev 1.1 2/94
Copyright
©
1994
1
11861 Western Avenue
Garden Grove, CA 92841
(714) 898-8121
FAX: (714) 893-2570
L
INFINITY
Microelectronics Inc.
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