ON Semiconductor MC33067 - User Manual

© Semiconductor Components Industries, LLC, 2009
December, 2009 − Rev. 13
1 Publication Order Number:
MC34067/D
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
• 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
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Figure 1. Simplified Block Diagram
Noninverting
Input
11
8
6
16
3
2
1
OSC Charge
Enable /
UVLO Adjust
V
CC
15
5
14
12
13
V
ref
UVLO
Error
Amp
V
CC
UVLO /
Enable
Fault Detector/
Latch
2.5 V
Clamp
Soft-Start
One-Shot
Output B
Inverting Input
Soft-Start
7
Error Amp
Output
One-Shot
Oscillator
Control Current
OSC RC
9
Ground4
Fault Input
10
Pwr GND
Output A
V
ref
Variable
Frequency
Oscillator
Steering
Flip-Flop
5.0 V
Reference
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
MARKING
DIAGRAMS
x = 3 or 4
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
G = Pb−Free Package
PDIP−16
P SUFFIX
CASE 648
1
16
SOIC−16W
DW SUFFIX
CASE 751G
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
PIN CONNECTIONS
(Top View)
V
ref
OSC Charge
OSC RC
OSC Control Current
GND
Error Amp Out
Inverting Input
Noninverting Input
One-Shot RC
V
CC
Drive Output B
C
Soft-Start
Enable/UVLO
Adjust
Drive Output A
Power GND
Fault Input
http://onsemi.com
16
1
MC3x067DW
AWLYYWWG
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
ORDERING INFORMATION
16
1
MC3x067P
AWLYYWWG
16
1
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ON Semiconductor MC33067 Specifications