ACT337 Просмотр технического описания (PDF) - Active-Semi, Inc

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ACT337

High Performance ActivePSR™ Primary Switching Regulator

Active-Semi, Inc 

ACT337

Rev 2, 14-Nov-12

ELECTRICAL CHARACTERISTICS CONT’D

(VDD = 12V, VOUT = 5V, LP = 1.25mH, NP = 110, NS = 8, NA = 18, TA = 25°C, unless otherwise specified.)

PARAMETER

Current Limit

SW Current Limit Range

CS Current Limit Threshold

Leading Edge Blanking Time

Driver Outputs

Switch ON-Resistance

SW Off Leakage Current

Protection

VDD Latch-Off Voltage

Thermal Shutdown Temperature

Thermal Hysteresis

Line UVLO

SYMBOL TEST CONDITIONS MIN TYP MAX UNIT

ILIM

VCSLIM

tOFF_DELAY = 0

100

600 mA

380 396 412 mV

200 300

ns

RON

ISW = 50mA

VSW = VDD = 22V

VDDOVP

IFBUVLO

1.6

3

Ω

1

µA

VDDON

+2

VDDON

+3

VDDON

+4

V

135

˚C

20

˚C

134

µA

FUNCTIONAL BLOCK DIAGRAM

VDD

BD

REGULATOR ON

&

UVLO

REFERENCE

FB

2.20V

SIGNAL

FILTER

CABLE

COMPENSATION

CURRENT

SHAPING

0.4V

SW

BASE

DRIVER

OTP

OVP

LOGIC

OSCILLATOR

G

CS

Innovative PowerTM

-4-

www.active-semi.com

Copyright © 2012 Active-Semi, Inc.

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