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SG1845J

产品描述Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, CDIP14, CERAMIC, DIP-14
产品类别电源/电源管理    电源电路   
文件大小216KB,共12页
制造商Linfinity Microelectronics
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SG1845J概述

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, CDIP14, CERAMIC, DIP-14

SG1845J规格参数

参数名称属性值
是否Rohs认证不符合
包装说明CERAMIC, DIP-14
Reach Compliance Codeunknown
模拟集成电路 - 其他类型SWITCHING CONTROLLER
控制模式CURRENT-MODE
控制技术PULSE WIDTH MODULATION
最大输入电压25 V
最小输入电压12 V
标称输入电压15 V
JESD-30 代码R-CDIP-T14
JESD-609代码e0
功能数量1
端子数量14
最高工作温度125 °C
最低工作温度-55 °C
最大输出电流1 A
封装主体材料CERAMIC, METAL-SEALED COFIRED
封装代码DIP
封装等效代码DIP14,.3
封装形状RECTANGULAR
封装形式IN-LINE
认证状态Not Qualified
表面贴装NO
切换器配置PUSH-PULL
最大切换频率500 kHz
技术BIPOLAR
温度等级MILITARY
端子面层Tin/Lead (Sn/Pb)
端子形式THROUGH-HOLE
端子节距2.54 mm
端子位置DUAL
Base Number Matches1

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L I N D
O C
# :
1844
SG1844/SG1845 Series
C
URRENT
M
ODE
PWM C
ONTROLLER
T
H E
I
N F I N I T E
P
O W E R
O F
I
N N O VA T I O N
P
R O D U C T I O N
D
A T A
S
H E E T
DESCRIPTION
The SG1844/45 family of control ICs
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 SG1844/45 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.
Both operate up to a maximum duty
cycle range of zero to <50% due to an
internal toggle flip-flop which blanks the
output off every other clock cycle.
The SG1844/45 is specified for
operation over the full military ambient
temperature range of -55°C to 125°C.
The SG2844/45 is specified for the
industrial range of -25°C to 85°C, and
the SG3844/45 is designed for the
commercial range of 0°C to 70°C.
K E Y F E AT U R E S
s
OPTIMIZED FOR OFF-LINE CONTROL
s
LOW START-UP CURRENT (<1mA)
s
AUTOMATIC FEED FORWARD
COMPENSATION
s
TRIMMED OSCILLATOR DISCHARGE
CURRENT
s
PULSE-BY-PULSE CURRENT LIMITING
s
ENHANCED LOAD RESPONSE
CHARACTERISTICS
s
UNDER-VOLTAGE LOCKOUT WITH 6V
HYSTERESIS (SG1844 only)
s
DOUBLE PULSE SUPPRESSION
s
HIGH-CURRENT TOTEM-POLE OUTPUT
s
INTERNALLY TRIMMED BANDGAP
REFERENCE
s
500kHz OPERATION
s
UNDERVOLTAGE LOCKOUT
SG1844 - 16 volts
SG1845 - 8.4 volts
s
LOW SHOOT-THROUGH CURRENT <75mA
OVER TEMPERATURE
PRODUCT HIGHLIGHT
T
Y P I C A L
A
P P L I C AT I O N
OF
S G 3 8 4 4 I
N
A F
LY B A C K
C
O N V E R T E R
R
ST
HIGH RELIABILITY FEATURES
s
AVAILABLE TO MIL-STD-883B
s
LINFINITY LEVEL "S" PROCESSING AVAILABLE
AC
INPUT
I
ST
V
CC
SG3844
T
A
(°C)
0 to 70
-25 to 85
-55 to 125
MIL-STD/883
DESC
M
8-pin
Plastic DIP
N
PA C K A G E O R D E R I N F O R M AT I O N
Plastic DIP
Plastic SOIC
Plastic SOIC
Ceramic DIP
Ceramic DIP
DM
8-pin
D
14-pin
Y
8-pin
J
14-pin
14-pin
SG3844N
SG3845N
SG2844N
SG2845N
SG3844DM
SG3845DM
SG2844DM
SG2845DM
SG3844D
SG3845D
SG2844D
SG2845D
SG3844Y
SG3845Y
SG2844Y
SG2845Y
SG1844Y
SG1845Y
SG3844J
SG3845J
SG2844J
SG2845J
SG1844J
SG1845J
F
10-pin
Cer. Flatpack
L
20-pin
Ceramic LCC
SG3844M
SG3845M
SG2844M
SG2845M
SG1844L
SG1845L
SG1844L/883B
SG1845L/883B
SG1844Y/883B SG1844J/883B
SG1845Y/883B SG1845J/883B
SG1844Y/DESC SG1844J/DESC
SG1844F/DESC SG1844L/DESC
SG1845F/DESC SG1845L/DESC
SG1845Y/DESC SG1845J/DESC
Note: All surface-mount packages are available in Tape & Reel.
F O R F U R T H E R I N F O R M AT I O N C A L L ( 7 1 4 ) 8 9 8 - 8 1 2 1
Copyright © 2000
Rev. 1.4 4/00
11861 W
ESTERN
A
VENUE
, G
ARDEN
G
ROVE
, CA. 92841
1
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