ACT6390MH-T データシートの表示（PDF） - Active-Semi, Inc

部品番号

コンポーネント説明

一致するリスト

ACT6390MH-T

1.7A/2.5A PWM Step-Up DC/DC Converters In MSOP

Active-Semi, Inc 

fZ(ESR)

=

2π

1

× 33μF

× 0.5Ω

=

9.64kHz

(31)

fZ(ESR) < fC

CCOMP2

= RESR ×COUT

RCOMP

= 0.5Ω×33μF

233kΩ

= 70.8pF

Choose CCOMP2 = 82pF

(32)

Rectifier Selection

For optimal performance, the rectifier should be a

Schottky rectifier that is rated to handle both the

output voltage as well as the peak switch current.

Over Voltage Protection

The ACT6390 and ACT6391 both feature internal

automatic over-voltage protection (OVP). Once the

outputs achieve regulation, if the voltage at FB falls

below 0.125V the controller will automatically dis-

able and latch off, preventing the controller from

running open-loop and potentially damaging the IC

and load.

To re-enable the converters, simply cycle the EN

pin or remove and reapply power to the input.

Shutdown

Drive EN low to disable the IC and reduce the sup-

ply current to just 0.1µA. As with all non-

synchronous step-up DC/DC converters, the exter-

nal Schottky diode provides a DC path from the in-

put to the output in shutdown. As a result, the out-

put drops to one diode voltage drop below the input

in shutdown.

Thermal Shutdown

The ACT6390 and ACT6391 both feature integrated

thermal overload protection. Both devices are auto-

matically disabled when their junction temperatures

exceed 160°C, and automatically re-enable when

the die temperature decreases by 20°C.

ACT6390/ACT6391

Rev 1, 22-Aug-13

Innovative PowerTM

-8-

www.active-semi.com

Copyright © 2013 Active-Semi, Inc.

Share Link: