Datasheet > SG1549_1

SG1549_1

更新时间： 2024-09-30 06:11:19

品牌	Logo	应用领域
美高森美 - MICROSEMI		/
页数	文件大小	规格书
4页	178K
描述
CURRENT SENSE LATCH

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数据手册

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SG1549_1 数据手册

SG1549/SG2549/SG3549

CURRENT SENSE LATCH

DESCRIPTION

FEATURES

• Current sensing with 100mV

threshold

• Common-mode input at ground or

to 40V

• Complementary outputs

• Automatic reset from PWM clock

• 180ns delay

This monolithic integrated circuit is an analog latch device with digital reset. It was

specifically designed to provide pulse-by-pulse current limiting for switch-mode power

supply systems, but many other application are also feasible. Its function is to provide

a latching switch action upon sensing an input threshold voltage, with reset accom-

plished by an external clock signal. This device can be interfaced directly with many

kinds of pulse width modulating control IC's, including the SG1524, SG1525A and

SG1527A.

• Interface direct to SG1524,

SG1525A, SG1527A

The input threshold for the latch circuit is 100mV, which can be referenced either to

ground or to a wide-ranging positive voltage. There are high and low-going output

signals available, and both the supply voltage and clock signal can be taken directly

from an associated PWM control chip.

HIGH RELIABILITY FEATURES

- SG1549

With delays in the range of 200 nanoseconds, this latch circuit is ideal for fast reaction

sensing to provide overall current limiting, short circuit protection, or transformer

saturation control.

♦ Available to MIL-STD-883

♦ LMI level "S" processing available

♦ Radiation data available

BLOCK DIAGRAM

SCHEMATIC

Rev 1.1a 03/17/2005

Microsemi Inc.

11861 Western Avenue ∞ Garden Grove, CA 92841

(714) 898-8121 FAX: (714) 893-2570

∞

12 3 4

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