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MC34065-H Datasheet(PDF) 1 Page - ON Semiconductor

Part No. MC34065-H
Description  High Performance Dual Channel Current Mode Controllers
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

MC34065-H Datasheet(HTML) 1 Page - ON Semiconductor

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© Semiconductor Components Industries, LLC, 2006
July, 2006 − Rev. 2
1
Publication Order Number:
MC34065−H/D
MC34065−H, L
MC33065−H, L
High Performance
Dual Channel Current
Mode Controllers
The MC34065−H,L series are high performance, fixed frequency,
dual current mode controllers. They are specifically designed for
off−line and dc−to−dc converter applications offering the designer a
cost effective solution with minimal external components. These
integrated circuits 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, cycle−by−cycle
current limiting, and a latch for single pulse metering of each output.
These devices are available in dual−in−line and surface mount
packages.
The MC34065−H has UVLO thresholds of 14 V (on) and 10 V (off),
ideally suited for off−line converters. The MC34065−L is tailored for
lower voltage applications having UVLO thresholds of 8.4 V (on) and
7.8 V (off).
Unique Oscillator for Precise Duty Cycle Limit and Frequency Control
Current Mode Operation to 500 kHz
Automatic Feed Forward Compensation
Separate Latching PWMs for Cycle−By−Cycle 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
Representative Block Diagram
+
+
Vref
Sync Input
RT
CT
Voltage
Feedback 1
Compensation 1
Drive Output
2
Enable
Voltage
Feedback 2
Compensation 2
1
5
1
5
13
12
14
4
2
3
7
6
10
11
Drive Output 1
Current Sense
1
Drive Output 2
Current Sense
2
VCC
16
Gnd
8
Drive Gnd
9
Error
Amp 2
Error
Amp 1
Oscillator
Vref
Undervoltage
Lockout
5.0V
Reference
VCC
Undervoltage
Lockout
Latching
PWM 1
Latching
PWM 2
R
R
http://onsemi.com
SEMICONDUCTOR
TECHNICAL DATA
HIGH PERFORMANCE
DUAL CHANNEL CURRENT
MODE CONTROLLERS
P SUFFIX
PLASTIC PACKAGE
CASE 648
DW SUFFIX
PLASTIC PACKAGE
CASE 751G
(SO−16L)
1
16
16
1
ORDERING INFORMATION
PIN CONNECTIONS
Sync Input
CT
RT
Voltage Feedback 1
Compensation 1
Current Sense 1
Drive Output 1
Gnd
VCC
Vref
Drive Output 2 Enable
Voltage Feedback
2
Compensation
2
Current Sense
2
Drive Output 2
Drive
Gnd
1
(Top View)
2
3
4
5
6
7
89
11
10
12
13
14
15
16
TA = −40° to +85°C
Device
Operating
Temperature Range
Package
MC34065DW−H
TA = 0° to +70°C
SO−16L
MC34065DW−L
MC34065P−H
MC34065P−L
MC33065DW−H
MC33065DW−L
MC33065P−H
MC33065P−L
Plastic DIP
SO−16L
Plastic DIP


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