MC34066P ON Semiconductor, MC34066P Datasheet

no-image

MC34066P

Manufacturer Part Number
MC34066P
Description
Manufacturer
ON Semiconductor
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MC34066P
Manufacturer:
TI
Quantity:
6 237
MC34066, MC33066
High Performance
Resonant Mode Controllers
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.
comparator and latch, programmable soft−start circuitry, input
undervoltage lockout with selectable thresholds, and reference
undervoltage lockout.
packages.
© Semiconductor Components Industries, LLC, 2006
July, 2006 − Rev. 3
One−Shot RC
UVLO Adjust
The MC34066/MC33066 are high performance resonant mode
Also included are protective features consisting of a high speed fault
These devices are available in dual−in−line and surface mount
Error Amp +
Error Amp −
1000:1
Operation
Osc Control
Variable Frequency Oscillator with a Control Range Exceeding
Programmable Oscillator Deadtime Allows Constant Off−Time
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
Error Amp
Deadtime
C
Soft−Start
Osc RC
Enable/
Current
V
Osc
Out
CC
15
16
11
6
9
1
2
3
8
7
Amplifier
Error
V
CC
Figure 1. Simplified Block Diagram
UVLO
Error Amp
Clamp
One−Shot
Frequency
Oscillator
Reference
Variable
Regulator
Soft−Start
V
Flip−Flop
ref
Steering
Fault−Detector/
UVLO
Latch
A
B
out
out
1
14
12
10
13
5
4
V
Gnd
Drive
Output A
Drive
Output B
Drive Gnd
Fault Input
ref
16
MC34066P
MC33066DW
MC33066P
Noninverting Input
16
1
Error Amp Out
Osc Deadtime
Inverting Input
Device
Osc Control
Error Amp
Error Amp
Osc RC
Current
1
ORDERING INFORMATION
Gnd
V
ref
PIN CONNECTIONS
http://onsemi.com
x
A
WL = Wafer Lot
YY = Year
WW = Work Week
1
2
3
4
5
6
7
8
= 3 or 4
= Assembly Location
DW SUFFIX
CASE 751G
CASE 648
PDIP−16
SO−16W
PDIP−16
P SUFFIX
Package
PDIP−16
SO−16W
(Top View)
Publication Order Number:
16
1
16 One−Shot RC
15
14
13
12
11
10
9
25 Units/Rail
47 Units/Rail
25 Units/Rail
DIAGRAMS
16
1
MARKING
AWLYYWW
Shipping
MC33066DW
MC3x066P
AWLYYWW
V
Drive Output A
Drive Gnd
Drive Output B
C
Fault Input
Enable/UVLO
Adjust
MC34066/D
CC
Soft−Start

Related parts for MC34066P

MC34066P Summary of contents

Page 1

... V UVLO Gnd ref 4 Drive A out Output A 14 Steering Noninverting Input Flip−Flop Drive B out Output B 12 Drive Gnd 13 MC34066P Fault−Detector/ Fault Input Latch 10 MC33066DW MC33066P 1 http://onsemi.com MARKING DIAGRAMS 16 PDIP−16 MC3x066P P SUFFIX AWLYYWW CASE 648 SO−16W MC33066DW ...

Page 2

MAXIMUM RATINGS Rating Power Input Supply Voltage Drive Output Current, Source or Sink (Note 1) Continuous Pulsed (0.5 μs, 25% Duty Cycle) Error Amplifier, Fault, One−Shot, Oscillator, and Soft−Start Inputs UVLO Adjust Input Soft−Start Discharge Current Power Dissipation and Thermal ...

Page 3

ELECTRICAL CHARACTERISTICS (continued 300 pF 14 300 pF, C OSC T T temperature range that applies [Note 5], unless otherwise noted.) Characteristics OSCILLATOR Frequency (Error Amp Output Low 25°C A Total ...

Page 4

50k 7k 7k Enable/ UVLO Adjust 9 50k 8V Osc Deadtime Osc RC R OSC OSC OSC One−Shot Osc Control Current 3 Current Mirror ...

Page 5

Primary Control Path The output pulse width and repetition rate are regulated through the interaction of the variable frequency Oscillator, One−Shot timer and Error Amplifier. The Oscillator triggers the One−Shot which generates a pulse that is alternately steered to a ...

Page 6

The maximum oscillator frequency is set by resistor similar fashion using Equations 1 and 3 in Equation dchg(min) f OSC(max) The value chosen for resistor R DT voltage of the oscillator ...

Page 7

One−Shot 5 OSC 3 dchg 5 3 OUT off B OUT t > t dchg One−Shot 5.1 V 4.9 V ...

Page 8

Errors in the threshold voltage and propagation delays through the output drivers will affect the One−Shot period. To guarantee accuracy, the output pulse of the control ship is trimmed to within 5% of 1.5 μs with nominal values of R ...

Page 9

50k 7k Enable/ UVLO Adjust 9 Figure 7. Undervoltage Lockout and Reference The Enable/UVLO Adjust terminal allows the power supply designer to select the V UVLO threshold voltages. CC When this pin is open, the comparator switches ...

Page 10

−T− 0.25 (0.010 16X 0. SEATING e PLANE 14X ...

Page 11

... Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303− ...

Related keywords