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SG1842L/883B

Description
1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, CQCC20
CategoryPower/power management    The power supply circuit   
File Size671KB,24 Pages
ManufacturerMicrosemi
Websitehttps://www.microsemi.com
Download Datasheet Parametric View All

SG1842L/883B Overview

1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, CQCC20

SG1842L/883B Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?incompatible
Parts packaging codeQLCC
package instructionQCCN, LCC20,.35SQ
Contacts20
Reach Compliance Code_compli
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage25 V
Minimum input voltage11 V
Nominal input voltage15 V
JESD-30 codeS-CQCC-N20
JESD-609 codee0
length8.89 mm
Number of functions1
Number of terminals20
Maximum operating temperature125 °C
Minimum operating temperature-55 °C
Maximum output current1 A
Package body materialCERAMIC, METAL-SEALED COFIRED
encapsulated codeQCCN
Encapsulate equivalent codeLCC20,.35SQ
Package shapeSQUARE
Package formCHIP CARRIER
Peak Reflow Temperature (Celsius)NOT SPECIFIED
Certification statusNot Qualified
Filter levelMIL-STD-883 Class B
Maximum seat height2.286 mm
surface mountYES
Switch configurationSINGLE
Maximum switching frequency500 kHz
technologyBIPOLAR
Temperature levelMILITARY
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formNO LEAD
Terminal pitch0.635 mm
Terminal locationQUAD
Maximum time at peak reflow temperatureNOT SPECIFIED
width8.89 mm
Base Number Matches1
SG1842/SG1843
Current Mode PWM Controller
Description
The SG1842/43 family of control IC's provides all the
necessary features to implement off-line fixed
frequency, current-mode switching power supplies
with a minimum number of external components.
Current-mode architecture demonstrates improved
line regulation, improved load regulation, pulse-by-
pulse current limiting and inherent protection of the
power supply output switch. The bandgap reference
is trimmed to ±1% over temperature.
Oscillator discharge current is trimmed to less than
±10%. The SG1842/43 has under-voltage lockout,
current limiting circuitry and start-up current of less
than 1mA. The totem-pole output is optimized to drive
the gate of a power MOSFET. The output is low in
the off state to provide direct interface to an
N-channel device. The SG1842/43 is specified for
operation over the full military ambient temperature
range of -55°C to 125°C. The SG2842/43 is specified
for the industrial range of -25°C to 85°C, and the
SG3842/43 is designed for the commercial range of
0°C to 70°C.
Features
Optimized For Off-Line Control
Low Start-Up Current (<1mA)
Automatic Feed Forward Compensation
Trimmed Oscillator Discharge Current
Pulse-By-Pulse Current Limiting
Enhanced Load Response Characteristics
Under-Voltage Lockout with 6V Hysteresis (SG1842
only)
Double-Pulse Suppression
High-Current Totem-Pole Output (1A Peak)
Internally Trimmed Bandgap Reference
500kHz Operation
Undervoltage Lockout
SG1842 - 16 volts
SG1843 - 8.4 volts
Low Shoot-Through Current <75mA Over
Temperature
Application
Available To MIL-STD
– 883, ¶ 1.2.1
Available to DSCC
- Standard Microcircuit Drawing (SMD)
Product Highlight
R
ST
AC
INPUT
I
ST
V
cc
SG3842/43
Figure 1 ·
Product Highlight
October 2014 Rev. 1.7
www.microsemi.com
© 2014 Microsemi Corporation
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