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PDF UPD16855DG Data sheet ( Hoja de datos )
| Número de pieza | UPD16855DG | |
| Descripción | DUAL HIGH-SIDE SWITCH FOR USB APPLICATION | |
| Fabricantes | NEC | |
| Logotipo |  |
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DATA SHEET
MOS INTEGRATED CIRCUIT
µPD16855A/B/C/D
DUAL HIGH-SIDE SWITCH FOR USB APPLICATION
DESCRIPTION
This product is the power switch IC with over current limit, used for the power supply bus of the Universal-Serial-
Bus (USB).
2 circuit builds in the Pch power MOSFET in the switch part, and this product realizes low on resistance (100 mΩ
TYP.) respectively.
And the over current detection, the thermal-shutdown circuit, an under voltage locked-out (UVLO) circuit whose
functions are necessary in the Host/HUB-controller of the USB standard are built in.
And the over-current-detect result can be reported to the controller by flag-pin.
This product builds in each two circuits of the power switch, control-pins and flag-pins, and this IC can be able to
control the power supply bus in 2 USB port.
There are four kinds of this product by the input logic of the control signal and switch operation in over-current
detect.
FEATURES
• Pch power MOSFET, 2 circuit building in
• Over-current detection circuit is built in and its result is outputted from flag-pin (“L” active)
• Prevent from dropping power supply by over current limit circuit
• Thermal shutdown circuit building in
• Under Voltage Locked Out (UVLO) circuit building in
• Switch on/off control is possible by the control-pin.
• 8 pin DIP/SOP package
ORDERING INFORMATION
PART NO.
µPD16855BC
PACKAGE
8-pin plastic DIP (300mil)
µPD16855AG
µPD16855BG
µPD16855CG
µPD16855DG
8-pin plastic SOP (225mil)
8-pin plastic SOP (225mil)
8-pin plastic SOP (225mil)
8-pin plastic SOP (225mil)
The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
Not all devices/types available in every country. Please check with local NEC representative for
availability and additional information.
Document No. S13020EJ1V0DS00 (1st edition)
Date Published February 1999 N CP(K)
Printed in Japan
©
1998
1 page  
µPD16855
µPD16855CG (Active-H and Switch off with over-current detect)
CTL1
H
H
L
L
H
H
X
X
FLG1
H
H
H
H
L
H
L
L
OUT1
ON
ON
OFF
OFF
OFF
ON
OFF
OFF
CTL2
H
L
H
L
H
H
X
X
FLG2
H
H
H
H
H
L
L
L
OUT2
ON
OFF
ON
OFF
ON
OFF
OFF
OFF
Operating mode
normal mode
only OUT1 is ON
only OUT2 is ON
standby mode
only OUT1 is over-current detect
only OUT2 is over-current detect
TSD mode
UVLO mode
µPD16855DG (Active-L and Switch off with over-current detect)
CTL1
L
L
H
H
L
L
X
X
FLG1
H
H
H
H
L
H
L
L
OUT1
ON
ON
OFF
OFF
OFF
ON
OFF
OFF
CTL2
L
H
L
H
L
L
X
X
FLG2
H
H
H
H
H
L
L
L
OUT2
ON
OFF
ON
OFF
ON
OFF
OFF
OFF
Operating mode
normal mode
only OUT1 is ON
only OUT2 is ON
standby mode
only OUT1 is over-current detect
only OUT2 is over-current detect
TSD mode
UVLO mode
Data Sheet S13020EJ1V0DS00
5
5 Page 
2. Under Voltage Locked Out (UVLO) Circuit
UVLO is the circuit for preventing malfunction of the switch by voltage variation.
In the Power Up : less than 3.5 V (typ.) and in the Power Down : less than 3.3 V (typ.)
OUT : OFF
FLG : “L” ( = 0V)
5V
µPD16855
3.3 V 3.5 V
Input
5V
3. Behavior in the case of Power ON
This IC is slowly started up by Soft-Start Operation when IC is powered on.
This function is to prevent from flowing large current in the period of charging the capacitor which is connected to
Output-pin.
In Power ON state, Soft-Start Time is 5ms (typ.)
5V
Vin
0V
5V
VOUT
0V
2.5 ms min.
12 ms max.
10 µ s
max.
Data Sheet S13020EJ1V0DS00
11
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet UPD16855DG.PDF ] | |
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