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NCP4330 Datasheet(PDF) 1 Page - ON Semiconductor

No. de Pieza. NCP4330
Descripción  Post Regulation Driver
Descarga  18 Pages
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Fabricante  ONSEMI [ON Semiconductor]
Página de inicio  http://www.onsemi.com
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NCP4330 Datasheet(HTML) 1 Page - ON Semiconductor

 
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© Semiconductor Components Industries, LLC, 2005
August, 2005 − Rev. 0
1
Publication Order Number:
NCP4330/D
NCP4330
Post Regulation Driver
The NCP4330 houses a dual MOSFET driver intended to be used as
a companion chip in AC−DC or DC−DC multi−output post regulated
power supplies. Being directly fed by the secondary AC signal, the
device keeps power dissipation to the lowest while reducing the
surrounding part count. Furthermore, the implementation of a
N−channel MOSFET gives NCP4330−based applications a significant
advantage in terms of efficiency.
Features
Undervoltage Lockout
Thermal Shutdown for Overtemperature Protection
PWM Operation Synchronized to the Converter Frequency
High Gate Drive Capability
Bootstrap for N−MOSFET High−Side Drive
Over−Lap Management for Soft Switching
High Efficiency Post−Regulation
Ideal for Frequencies up to 400 kHz
This is a Pb−Free Device
Typical Applications
ATX 3V3 Post−Regulation
Offline SMPS with MAGAMP Post−Regulation
Multi−Outputs DC−DC Converters
Buffer
AR2
Buffer
AR3
Current
Mirror
2.5 V/1.5 V
Level
Shifter
Band−Gap
UVD
Vref, UVDth
Comparator
Iramp
BST
HS_DRV
LS_DRV
C_ramp
I_ramp
GND
RST
RESET Block
U1
INVERTER
Iramp
Hysteresis
HS_DRV and
+
LS_DRV low
Figure 1. Block Diagram
VDD
VDD
VDD
VDD
VDD
Undervoltage Detection
(UVD high if VDD < 4.9 V)
U3
OR
U4
1
8
ORDERING INFORMATION
Device
Package
Shipping
NCP4330DR2G
SO−8
(Pb−Free)
2500 / Tape & Reel
1
HS_DRV
8 GND
2
BST
3
RST
4
C_ramp
7 LS_DRV
6 VDD
5 I_ramp
(Top View)
MARKING
DIAGRAM
SO−8
D SUFFIX
CASE 751
4330D
= Device Number
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
PIN CONNECTIONS
http://onsemi.com
4330D
ALYW
1
8
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.


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