Moteur de recherche de fiches techniques de composants électroniques
  French  ▼
ALLDATASHEET.FR

X  

MP8763D Fiches technique(PDF) 17 Page - Monolithic Power Systems

No de pièce MP8763D
Description  High Efficiency, 12A, 18V Synchronous Step-down Converter With Output Discharge
Download  25 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  MPS [Monolithic Power Systems]
Site Internet  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP8763D Fiches technique(HTML) 17 Page - Monolithic Power Systems

Back Button MP8763D Datasheet HTML 13Page - Monolithic Power Systems MP8763D Datasheet HTML 14Page - Monolithic Power Systems MP8763D Datasheet HTML 15Page - Monolithic Power Systems MP8763D Datasheet HTML 16Page - Monolithic Power Systems MP8763D Datasheet HTML 17Page - Monolithic Power Systems MP8763D Datasheet HTML 18Page - Monolithic Power Systems MP8763D Datasheet HTML 19Page - Monolithic Power Systems MP8763D Datasheet HTML 20Page - Monolithic Power Systems MP8763D Datasheet HTML 21Page - Monolithic Power Systems Next Button
Zoom Inzoom in Zoom Outzoom out
 17 / 25 page
background image
MP8763D ― 12A, 18V, SYNCHRONOUS STEP-DOWN CONVERTER
MP8763D Rev. 1.1
www.MonolithicPower.com
17
1/15/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
voltage source that measures less than 5.5V
through a pull-up resistor (typically 100kΩ). After
VCC is ready, the MOSFET turns on so that the
PG pin is pulled to GND before the SS is ready.
After the FB voltage reaches 91% of the REF
voltage, the PG pin is pulled high after a 2.5ms
delay.
When the FB voltage drops to 85% of the REF
voltage or exceeds 120% of the nominal REF
voltage, the PG pin is pulled low.
If the input supply fails to power the MP8763D,
the PG pin is also pulled low even though this pin
is tied to an external DC source through a pull-up
resistor (typically 100kΩ).
Over-Current Protection (OCP)
The MP8763D features TWO current limit levels
for over-current conditions: low-side valley
current limit and low-side negative current limit.
Low-Side
Valley
Current
Limit
: The device
monitors the inductor current during the LS-FET
ON state. When ILIM=1 and at the end of the
OFF time, the LS-FET sourcing current is
compared to the internal positive-valley–current
limit. If the valley current limit is less than the LS-
FET sourcing current, the HS-FET remains OFF
and the LS-FET remains ON for the next ON time.
When the LS-FET sourcing current drops below
the valley current limit, the HS-FET turns on
again.
These parts enter OCP mode if the LS-FET
sourcing valley current exceeds the valley current
limit for about 40us. During OCP, the device tries
to recover from the over-current fault with hiccup
mode: the chip disables the output power stage,
discharges the soft-start capacitor and then
automatically retries soft-start. If the over-current
condition still holds after soft-start ends, the
device repeats this operation cycle until the over-
current conditions disappear and then output
rises back to regulation level. OCP offers non-
latch protection.
Low-Side Negative Current Limit:
If the sensed
LS-FET negative current exceeds the negative
current limit, the LS-FET turns off immediately
and stays OFF for the remainder of the OFF
period. In this situation, both MOSFETs are OFF
until the end of a fixed interval. The HS-FET body
diode conducts the inductor current for the fixed
time.
Over -Voltage Protection (OVP)
The MP8763D monitors the output voltage using
the FB pin connected to the tap of a resistor
divider to detect over-voltage. MP8763D provides
non-latch OVP mode.
If the FB voltage exceeds the nominal REF
voltage but remains lower than 120% of the REF
voltage (0.611V), both MOSFETs are off.
If the FB voltage exceeds 120% of the REF
voltage but remains below 130%, the LS-FET
turns on while the HS-FET remains off. The LS-
FET remains on until the FB voltage drops below
110% of the REF voltage or the low-side
negative current limit is hit.
If the FB voltage exceeds 130% of the REF
voltage, these parts enter a non-latch off mode.
Once the FB voltage comes back to the
reasonable value, they will exit this OVP mode
and operate normally again.
UVLO protection
The
MP8763D
has
under-voltage
lock-out
protection (UVLO). When the VCC voltage
exceeds the UVLO rising threshold voltage, the
MP8763D powers up. It shuts off when the VCC
voltage falls below the UVLO falling threshold
voltage. This is non-latch protection.
The MP8763D is disabled when the VCC voltage
falls below typically 3.4V. If an application
requires a higher UVLO threshold, use the two
external resistors connected to the EN pin as
shown in Figure 9 to adjust the startup input
voltage. For best results, use the enable resistors
to set the input voltage falling threshold (VSTOP)
above 3.6 V. Set the rising threshold (VSTART) to
provide enough hysteresis to account for any
input supply variations.


Numéro de pièce similaire - MP8763D

FabricantNo de pièceFiches techniqueDescription
logo
Monolithic Power System...
MP8763DGL MPS-MP8763DGL Datasheet
420Kb / 8P
   High Efficiency, 12A, 18V Synchronous Step-down Converter Evaluation Board
More results

Description similaire - MP8763D

FabricantNo de pièceFiches techniqueDescription
logo
Monolithic Power System...
MP8763 MPS-MP8763 Datasheet
1Mb / 24P
   High Efficiency, 12A, 18V, Synchronous, Step-Down Converter
EV8712-L-00A MPS-EV8712-L-00A Datasheet
624Kb / 9P
   High Efficiency,12A,18V, Synchronous Step-Down Converter
MP8760D MPS-MP8760D Datasheet
993Kb / 25P
   High Efficiency, 6A, 18V Synchronous Step-down Converter With Output Discharge
MPQ8632D-6 MPS-MPQ8632D-6 Datasheet
2Mb / 23P
   High Efficiency, 6A/12A, 18V Synchronous Step-down Converter
MP8869W MPS-MP8869W_V01 Datasheet
66Kb / 1P
   High-Efficiency, 12A, 18V, Synchronous Step-Down Converter with I2C Interface
Rev.0.8 4/25/2016
EV8763D-L-00A MPS-EV8763D-L-00A Datasheet
420Kb / 8P
   High Efficiency, 12A, 18V Synchronous Step-down Converter Evaluation Board
EV8764GLE-L-00A MPS-EV8764GLE-L-00A Datasheet
446Kb / 8P
   High Efficiency, 12A, 18V Synchronous Step-down Converter Evaluation Board
MP8764 MPS-MP8764 Datasheet
1Mb / 23P
   High Efficiency, 12A, 18V Synchronous Step-Down Converter with Latch-off OCP
MP8758 MPS-MP8758 Datasheet
867Kb / 21P
   High Efficiency, 10A, 18V Synchronous, Step-Down Converter
logo
SHANGHAI BELLING CO., L...
BL9384 BELLING-BL9384 Datasheet
289Kb / 6P
   3A, 18V High Efficiency Synchronous Step-Down Converter
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25


Fiches technique Télécharger

Go To PDF Page


Lien URL




Politique de confidentialité
ALLDATASHEET.FR
ALLDATASHEET vous a-t-il été utile ?  [ DONATE ] 

À propos de Alldatasheet   |   Publicité   |   Contactez-nous   |   Politique de confidentialité   |   Echange de liens   |   Fabricants
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com