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MC33066P Scheda tecnica(PDF) 1 Page - ON Semiconductor

Il numero della parte MC33066P
Spiegazioni elettronici  High Performance High Performance
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Produttore elettronici  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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© Semiconductor Components Industries, LLC, 2006
July, 2006 − Rev. 3
1
Publication Order Number:
MC34066/D
MC34066, MC33066
High Performance
Resonant Mode Controllers
The MC34066/MC33066 are high performance resonant mode
controllers designed for off−line and dc−to−dc converter applications
that utilize frequency modulated constant on−time or constant
off−time control. These integrated circuits feature a variable
frequency oscillator with programmable deadtime, precision
retriggerable one−shot timer, temperature compensated reference,
high gain wide−bandwidth error amplifier with a precision output
clamp, steering flip−flop, and dual high current totem pole outputs
ideally suited for driving power MOSFETs.
Also included are protective features consisting of a high speed fault
comparator and latch, programmable soft−start circuitry, input
undervoltage lockout with selectable thresholds, and reference
undervoltage lockout.
These devices are available in dual−in−line and surface mount
packages.
Variable Frequency Oscillator with a Control Range Exceeding
1000:1
Programmable Oscillator Deadtime Allows Constant Off−Time
Operation
Precision Retriggerable One−Shot Timer
Internally Trimmed Bandgap Reference
5.0 MHz Error Amplifier with Precision Output Clamp
Dual High Current Totem Pole Outputs
Selectable Undervoltage Lockout Thresholds with Hysteresis
Enable Input
Programmable Soft−Start Circuitry
Low Startup Current for Off−Line Operation
Figure 1. Simplified Block Diagram
15
9
1
2
3
16
6
8
7
11
VCC
Enable/
UVLO Adjust
Osc
Deadtime
Osc RC
Osc Control
Current
One−Shot RC
Error Amp
Out
Error Amp +
Error Amp −
CSoft−Start
VCC UVLO
Reference
Regulator
Vref UVLO
Variable
Frequency
Oscillator
One−Shot
Error Amp
Clamp
Error
Amplifier
Soft−Start
Steering
Flip−Flop
Aout
Bout
Fault−Detector/
Latch
5
4
14
12
13
10
Vref
Gnd
Drive
Output A
Drive
Output B
Drive Gnd
Fault Input
Device
Package
Shipping
ORDERING INFORMATION
MC34066P
PDIP−16
25 Units/Rail
MC33066P
PDIP−16
http://onsemi.com
25 Units/Rail
MC33066DW
SO−16W
47 Units/Rail
MARKING
DIAGRAMS
x
= 3 or 4
A
= Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
1
16
PDIP−16
P SUFFIX
CASE 648
1
16
SO−16W
DW SUFFIX
CASE 751G
1
16
MC3x066P
AWLYYWW
MC33066DW
AWLYYWW
1
16
PIN CONNECTIONS
Osc Deadtime
Osc RC
Osc Control
Current
Gnd
Vref
Error Amp Out
Error Amp
Inverting Input
Error Amp
Noninverting Input
(Top View)
1
2
3
4
5
6
7
89
10
11
12
13
14
15
16 One−Shot RC
VCC
Drive Output A
Drive Output B
Drive Gnd
CSoft−Start
Fault Input
Enable/UVLO
Adjust


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