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.
http://onsemi.com
MARKING
DIAGRAMS
16
1
MC3x067P
AWLYYWWG
16
1
PDIP−16
P SUFFIX
CASE 648
Features
• Zero Voltage Switch Resonant Mode Operation
• Variable Frequency Oscillator with a Control Range
Exceeding 1000:1
16
• Precision One−Shot Timer for Controlled Off−Time
• Internally Trimmed Bandgap Reference
• 4.0 MHz Error Amplifier
16
MC3x067DW
AWLYYWWG
1
• Dual High Current Totem Pole Outputs
• Selectable Undervoltage Lockout Thresholds with Hysteresis
• Enable Input
SOIC−16W
DW SUFFIX
CASE 751G
1
• Programmable Soft−Start Circuitry
• Low Startup Current for Off−Line Operation
• Pb−Free Packages are Available*
x
A
= 3 or 4
= Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
15
V
CC
G
= Pb−Free Package
9
1
5
V
UVLO /
CC
Enable
Enable /
UVLO Adjust
5.0 V
Reference
V
ref
OSC Charge
V
UVLO
ref
Variable
Frequency
Oscillator
PIN CONNECTIONS
2
OSC RC
Oscillator
Control Current
3
14
Output A
OSC Charge
OSC RC
One−Shot RC
1
2
3
4
5
6
16
15
16
Steering
Flip−Flop
One−Shot
One−Shot
V
CC
12
13
Output B
Pwr GND
Error Amp
Output
Noninverting
Input
6
8
2.5 V
Clamp
Drive Output A
Power GND
14
13
OSC Control Current
GND
V
ref
Drive Output B
12
11
10
9
Inverting Input
7
Error
Amp
Error Amp Out
Inverting Input
C
Soft−Start
11
Soft−Start
10
Fault Detector/
Latch
Soft−Start
Fault Input
Fault Input
7
8
Enable/UVLO
Adjust
Noninverting Input
4
Ground
(Top View)
Figure 1. Simplified Block Diagram
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
*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
1
Publication Order Number:
October, 2005 − Rev. 11
MC34067/D
ONSEMI [ ONSEMI ]
