MC34067, MC33067
High Performance
Resonant Mode Controllers
The MC34067/MC33067 are high performance zero voltage switch
resonant mode controllers designed for off−line and dc−to−dc
converter applications that utilize frequency modulated constant
off−time or constant deadtime control. These integrated circuits
feature a variable frequency oscillator, a precise retriggerable
one−shot timer, temperature compensated reference, high gain wide
bandwidth error amplifier, 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.
Features
http://onsemi.com
MARKING
DIAGRAMS
16
16
1
PDIP−16
P SUFFIX
CASE 648
1
MC3x067P
AWLYYWWG
•
Zero Voltage Switch Resonant Mode Operation
•
Variable Frequency Oscillator with a Control Range
•
•
•
•
•
•
•
•
•
Exceeding 1000:1
Precision One−Shot Timer for Controlled Off−Time
Internally Trimmed Bandgap Reference
4.0 MHz Error Amplifier
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
Pb−Free Packages are Available*
V
CC
15
V
CC
UVLO /
Enable
Variable
Frequency
Oscillator
5.0 V
Reference
V
ref
UVLO
14
One−Shot
2.5 V
Clamp
Steering
Flip−Flop
5
V
ref
16
16
1
SOIC−16W
DW SUFFIX
CASE 751G
x
A
WL
YY
WW
G
MC3x067DW
AWLYYWWG
1
Enable / 9
UVLO Adjust
1
OSC Charge
2
OSC RC
Oscillator 3
Control Current
One−Shot
16
= 3 or 4
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
PIN CONNECTIONS
Output A
OSC Charge 1
OSC RC 2
16 One−Shot RC
15 V
CC
14 Drive Output A
13 Power GND
12 Drive Output B
11 C
Soft−Start
10 Fault Input
Enable/UVLO
9
Adjust
(Top View)
12
13
Error Amp 6
Output
Noninverting 8
Input
Inverting Input 7
Soft−Start
11
Output B
Pwr GND
OSC Control Current 3
GND 4
V
ref
5
Error Amp Out 6
Error
Amp
Soft−Start
Fault Detector/
Latch
10
Fault Input
Inverting Input 7
Noninverting Input 8
4
Ground
Figure 1. Simplified Block Diagram
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
©
Semiconductor Components Industries, LLC, 2005
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
1
October, 2005 − Rev. 11
Publication Order Number:
MC34067/D
ONSEMI [ ON SEMICONDUCTOR ]
