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參數資料
| 型號： | SG3846N |
| 廠商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分類： | 穩壓器 |
| 英文描述： | CURRENT MODE PWM CONTROLLER |
| 中文描述： | 0.5 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDIP16 |
| 封裝： | ROHS COMPLIANT, PLASTIC, DIP-16 |
| 文件頁數： | 1/10頁 |
| 文件大小： | 210K |
| 代理商： | SG3846N |
CURRENT MODE PWM CONTROLLER
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
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.
BLOCK DIAGRAM
SG1846/SG2846/SG3846
4/90 Rev 1.1 2/94
Copyright
1994
L
IN
F
IN
ITY
Microelectronics Inc.
11861 Western Avenue
∞
∞
Garden Grove, CA 92841
(714) 898-8121
∞
FAX: (714) 893-2570
1
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