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参数资料
| 型号： | SG3845Y |
| 厂商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分类： | 稳压器 |
| 英文描述： | CURRENT MODE PWM CONTROLLER |
| 中文描述： | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, CDIP8 |
| 封装： | HERMETIC SEALED, CERAMIC, DIP-8 |
| 文件页数： | 1/12页 |
| 文件大小： | 216K |
| 代理商： | SG3845Y |
Copyright 2000
Rev. 1.4 4/00
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
11861 W
ESTERN
A
VENUE
, G
ARDEN
G
ROVE
, CA. 92841
1
C
U R R E N T
M
O D E
PWM C
O N T R O L L E R
P
R O D U C T I O N
D
A T A
S
H E E T
T
H E
I
N F I N I T E
P
O W E R
O F
I
N N O V A T I O N
SG1844/SG1845 Series
LIN D
OC
#:
1844
D E S C R I P T I O N
K E Y F E AT U R E S
I
OPTIMIZED FOR OFF-LINE CONTROL
I
LOW START-UP CURRENT (<1mA)
I
AUTOMATIC FEED FORWARD
COMPENSATION
I
TRIMMED OSCILLATOR DISCHARGE
CURRENT
I
PULSE-BY-PULSE CURRENT LIMITING
I
ENHANCED LOAD RESPONSE
CHARACTERISTICS
I
UNDER-VOLTAGE LOCKOUT WITH 6V
HYSTERESIS (SG1844 only)
I
DOUBLE PULSE SUPPRESSION
I
HIGH-CURRENT TOTEM-POLE OUTPUT
I
INTERNALLY TRIMMED BANDGAP
REFERENCE
I
500kHz OPERATION
I
UNDERVOLTAGE LOCKOUT
SG1844 - 16 volts
SG1845 - 8.4 volts
I
LOW SHOOT-THROUGH CURRENT <75mA
OVER TEMPERATURE
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
P R O D U C T H I G H L I G H T
PA C K A G E O R D E R I N F O R M AT I O N
Plastic SOIC
8-pin
DM
14-pin
D
T
A
(°C)
0 to 70
SG3844M
SG3844N
SG3844DM
SG3844D
SG3844Y
SG3844J
—
—
SG3845M
SG3845N
SG3845DM
SG3845D
SG3845Y
SG3845J
—
—
-25 to 85
SG2844M
SG2844N
SG2844DM
SG2844D
SG2844Y
SG2844J
—
—
SG2845M
SG2845N
SG2845DM
SG2845D
SG2845Y
SG2845J
—
—
-55 to 125
—
—
—
—
SG1844Y
SG1844J
—
SG1844L
—
—
—
—
SG1845Y
SG1845J
—
SG1845L
MIL-STD/883
—
—
—
—
SG1844Y/883B SG1844J/883B
—
SG1844L/883B
—
—
—
—
SG1845Y/883B SG1845J/883B
—
SG1845L/883B
DESC
—
—
—
—
SG1844Y/DESC SG1844J/DESC
SG1844F/DESC
SG1844L/DESC
—
—
SG1845Y/DESC SG1845J/DESC
SG1845F/DESC
SG1845L/DESC
T
YPICAL
A
PPLICATION
OF
SG3844 I
N
A F
LYBACK
C
ONVERTER
HIGH RELIABILITY FEATURES
I
AVAILABLE TO MIL-STD-883B
I
LINFINITY LEVEL "S" PROCESSING AVAILABLE
Note: All surface-mount packages are available in Tape & Reel.
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.
Plastic DIP
8-pin
M
Plastic DIP
14-pin
N
Plastic SOIC
Ceramic DIP
8-pin
Y
Ceramic DIP
14-pin
J
Cer. Flatpack
10-pin
F
Ceramic LCC
20-pin
L
AC
INPUT
SG3844
R
ST
I
ST
V
CC
相关PDF资料 |
PDF描述 |
|---|---|
| SG2844DM | CURRENT MODE PWM CONTROLLER |
| SG2844J | CURRENT MODE PWM CONTROLLER |
| SG2844M | CURRENT MODE PWM CONTROLLER |
| SG2844N | CURRENT MODE PWM CONTROLLER |
| SG2844Y | CURRENT MODE PWM CONTROLLER |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SG3846 | 制造商:MICROSEMI 制造商全称:Microsemi Corporation 功能描述:CURRENT MODE PWM CONTROLLER |
| SG3846DW | 功能描述:IC REG CTRLR BST PWM CM 16-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,000 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:1MHz 占空比:50% 电源电压:9 V ~ 10 V 降压:无 升压:是 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:8-TSSOP（0.173"，4.40mm 宽） 包装:带卷 (TR) |
| SG3846J | 制造商:Microsemi Corporation 功能描述:SG3846J - Bulk |
| SG3846N | 制造商:Microsemi Corporation 功能描述:Current Mode PWM Controller 100mA 16-Pin PDIP 制造商:Microsemi Corporation 功能描述:CURRENT MODE PWM CNTRLR 100MA 16PDIP - Bulk |
| SG3846Q | 制造商:Microsemi Corporation 功能描述:SG3846Q - Bulk |
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