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MC33023DWR2 bảng dữ liệu(PDF) 1 Page - ON Semiconductor

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© Semiconductor Components Industries, LLC, 2005
October, 2005 − Rev. 6
1
Publication Order Number:
MC34023/D
MC34023, MC33023
High Speed Single−Ended
PWM Controller
The MC34023 series are high speed, fixed frequency, single−ended
pulse width modulator controllers optimized for high frequency
operation. They are specifically designed for Off−Line and
DC−to−DC converter applications offering the designer a
cost−effective solution with minimal external components. These
integrated circuits feature an oscillator, a temperature compensated
reference, a wide bandwidth error amplifier, a high speed current
sensing comparator, and a high current totem pole output ideally
suited for driving a power MOSFET.
Also included are protective features consisting of input and
reference undervoltage lockouts each with hysteresis, cycle−by−cycle
current limiting, and a latch for single pulse metering.
The flexibility of this series allows it to be easily configured for
either current mode or voltage mode control.
Features
50 ns Propagation Delay to Output
High Current Totem Pole Output
Wide Bandwidth Error Amplifier
Fully−Latched Logic with Double Pulse Suppression
Latching PWM for Cycle−By−Cycle Current Limiting
Soft−Start Control with Latched Overcurrent Reset
Input Undervoltage Lockout with Hysteresis
Low Startup Current (500 mA Typ)
Internally Trimmed Reference with Undervoltage Lockout
90% Maximum Duty Cycle (Externally Adjustable)
Precision Trimmed Oscillator
Voltage or Current Mode Operation to 1.0 MHz
Functionally Similar to the UC3823
Pb−Free Packages are Available*
Error
Amp
Oscillator
16
Vref
Clock
RT
CT
Ramp
Error Amp
Output
Inverting
Input
Soft−Start
Soft−Start
Latching
PWM
Ground
10
9
Current
Limit/
Shutdown
Power
Ground
VC
VCC
UVLO
5.1V
Reference
Current
Limit Ref
This device contains 176 active transistors.
Output
Noninverting
Input
4
5
6
7
3
2
1
8
15
13
14
11
12
Figure 1. Simplified Application
MARKING DIAGRAMS
1
16
PDIP−16
P SUFFIX
CASE 648
1
16
SOIC−16W
DW SUFFIX
CASE 751G
1
16
MC34023P
AWLYYWWG
MC33023DW
AWLYYWWG
PIN CONNECTIONS
(Top View)
Error Amp
Noninverting Input
Soft−Start
Ramp
CT
RT
Clock
Error Amp Output
Error Amp
Inverting Input
Current Limit/
Shutdown
Current Limit
Reference
Power Ground
Output
VCC
Vref
11
5
2
1
9
10
12
13
14
15
16
8
7
6
4
3
Ground
VC
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
ORDERING INFORMATION
*For additional information on our Pb−Free strategy
and soldering details, please download the
ON Semiconductor Soldering and Mounting
Techniques Reference Manual, SOLDERRM/D.
http://onsemi.com
A
= Assembly Location
WL
= Wafer Lot
YY
= Year
WW
= Work Week
G
= Pb−Free Package
16
1


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