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What is MC33065?

This electronic component, produced by the manufacturer "ON Semiconductor", performs the same function as "High Performance Dual Channel Current Mode Controller".


MC33065 Datasheet PDF - ON Semiconductor

Part Number MC33065
Description High Performance Dual Channel Current Mode Controller
Manufacturers ON Semiconductor 
Logo ON Semiconductor Logo 


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MC34065, MC33065
High Performance
Dual Channel Current
Mode Controller
The MC34065 is a high performance, fixed frequency, dual current
mode controllers. It is specifically designed for offline and dctodc
converter applications offering the designer a cost effective solution
with minimal external components. This integrated circuit feature a
unique oscillator for precise duty cycle limit and frequency control, a
temperature compensated reference, two high gain error amplifiers,
two current sensing comparators, Drive Output 2 Enable pin, and two
high current totem pole outputs ideally suited for driving power
MOSFETs.
Also included are protective features consisting of input and
reference undervoltage lockouts each with hysteresis, cyclebycycle
current limiting, and a latch for single pulse metering of each output.
The MC34065 and MC33065 are available in dualinline and
surface mount packages.
Unique Oscillator for Precise Duty Cycle Limit and Frequency
Control
Current Mode Operation to 500 kHz
Automatic Feed Forward Compensation
Separate Latching PWMs for CycleByCycle Current Limiting
Internally Trimmed Reference with Undervoltage Lockout
Drive Output 2 Enable Pin
Two High Current Totem Pole Outputs
Input Undervoltage Lockout with Hysteresis
Low Startup and Operating Current
VCC 16
Vref
15
R
5.0 V
Reference
VCC
Undervoltage
Lockout
1
Sync Input
3
RT
CT
2
Voltage
Feedback 1 4
Compensation 1
5
R Vref
Undervoltage
Lockout
Oscillator
+
Error
Amp 1
Latching
PWM 1
Drive
7 Output 1
Current
6 Sense 1
Drive Output 2
Enable 14
Voltage
Feedback 2 13
Compensation 2
12
+
Error
Amp 2
Gnd 8
Latching
PWM 2
Drive Gnd 9
Drive
10 Output 2
Current
1 Sense 2
1
This device contains 208 active transistors.
Figure 1. Representative Block Diagram
© Semiconductor Components Industries, LLC, 2006
July, 2006 Rev. 3
1
http://onsemi.com
16
1
16
1
PDIP16
P SUFFIX
CASE 648
SO16W
DW SUFFIX
CASE 751G
PIN CONNECTIONS
Sync Input 1
CT 2
RT 3
Voltage Feedback 1 4
Compensation 1 5
Current Sense 1 6
Drive Output 1 7
Gnd 8
16 VCC
15 Vref
14
Drive Output 2
Enable
13 Voltage Feedback 2
12 Compensation 2
11 Current Sense 2
10 Drive Output 2
9 Drive Gnd
(Top View)
ORDERING INFORMATION
Device
Package
Shipping
MC34065DWL
SO16W 47 Units/Rail
MC34065PL
PDIP16 25 Units/Rail
MC33065DWL
SO16W 47 Units/Rail
MC33065DWH SO16W 47 Units/Rail
MC33065DWHR2 SO16W 1000 Tape & Reel
MC33065PH
PDIP16 25 Units/Rail
MC33065PL
PDIP16 25 Units/Rail
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 16 of this data sheet.
Publication Order Number:
MC34065/D

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MC33065 equivalent
2.55 V
2.50 V
MC34065, MC33065
VCC = 15 V
AV = −1.0
TA = 25°C
3.0 V
2.5 V
VCC = 15 V
AV = −1.0
TA = 25°C
2.45 V
1.0 μs/DIV
Figure 4. Error Amp SmallSignal
Transient Response
2.0 V
1.0 μs/DIV
Figure 5. Error Amp LargeSignal
Transient Response
100
80 Gain
60
VCC = 15 V
VO = 1.5 V to 2.5 V
RL = 100 k
TA = 25°C
0
30
60
40 90
20 Phase 120
0 150
−20 180
10 100 1.0 k 10 k 100 k 1.0 M 10 M
f, FREQUENCY (Hz)
Figure 6. Error Amp Open Loop Gain and
Phase versus Frequency
0.6
VCC = 15 V
0.5 TA = 125°C
0.4
0.3 TA = 25°C
0.2 TA = −55°C
0.1
0
0 1.0 2.0 3.0 4.0 5.0 6.0 7.0
VO, ERROR AMP OUTPUT VOLTAGE (V)
Figure 7. Current Sense Input Threshold
versus Error Amp Output Voltage
0
−4.0
−8.0
−12
−16
−20
−24
0
VCC = 15 V
TA = 125°C
TA = 25°C
TA = −55°C
20 40 60 80 100
Iref, REFERENCE SOURCE CURRENT (mA)
Figure 8. Reference Voltage Change
versus Source Current
120
120
VCC = 15 V
RL 0.1 Ω
100
80
60
−55
−25 0 25 50 75
TA, AMBIENT TEMPERATURE (°C)
100
125
Figure 9. Reference Short Circuit Current
versus Temperature
http://onsemi.com
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Part Details

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