IMP2524-1BN 데이터 시트보기 (PDF) - A1 PROs co., Ltd.

부품명

상세내역

제조사

IMP2524-1BN

Quad USB High-Side Power Switch with Fault Detection

A1 PROs co., Ltd. 

IMP2526

Application Information

VBUS

USB Hub

GND

4.7µF

IMP2526-2

1

ENA

8

OUTA

2 FLGA

7

IN

3 FLGB

6

GND

4

ENB

5

OUTB

USB

Controller

CBULK

USB

Function

USB

Function

CBULK

Cable

USB Peripheral

2526_07.eps

Figure 3. Inrush Current-Limit Application

Transient Overcurrent Filter

If a heavy capacitive load is suddenly connected to the output, the

switch current-limiting function may cause the fault-flag to go

low for 10µs to 200µs as the switch, in a constant current mode,

charges the capacitance. If this transient over-current fault report-

ing is not wanted, a simple 1ms RC low-pass filter in series with

the fault flag circuit will prevent this momentary flag (Figure 4).

V+

USB Controller

OVERCURRENT

10k

10k

0.1µF

IMP2526

2

FLG

Figure 4. Transient Filter

2526_05.eps

Upstream

VBUS

100mA max

VBUS

D+

D–

GND

IN OUT

LDO

GND

1µF

10k

10k

3.3V

USB Controller

VIN ON/OFF

OVERCURRENT

OVERCURRENT

ON/OFF

1µF

Data

100k

100k

VCC

5.0V

Ferrite

Beads

1

8

ENA OUTA

2 IMP2526-2 7

FLGA IN

3

FLGB

6

GND

4 ENB OUTB 5

+

47µF

0.1µF

VBUS

D+

D–

GND

USB

Port 1

47µF +

VBUS

D+

D–

GND

USB

Port 2

Data

(Two Pair)

Figure 5. Single-Port Self-Powered Hub Application

2526_08.eps

6

408-432-9100/www.impweb.com

© 2000 IMP, Inc. 6

Share Link: