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PDF ( 数据手册 , 数据表 ) MC34065

零件编号 MC34065
描述 High Performance Dual Channel Current Mode Controllers
制造商 Motorola Semiconductors
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MC34065 数据手册, 描述, 功能
High Performance
Dual Channel Current
Mode Controller
The MC34065 is a high performance, fixed frequency, dual current mode
controllers. It is specifically designed for off–line and dc–to–dc 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, cycle–by–cycle current limiting,
and a latch for single pulse metering of each output.
The MC34065 and MC33065 are available in dual–in–line 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 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
MC34065
MC33065
HIGH PERFORMANCE
DUAL CHANNEL CURRENT
MODE CONTROLLER
SEMICONDUCTOR
TECHNICAL DATA
P SUFFIX
PLASTIC PACKAGE
CASE 648
16
1
DW SUFFIX
PLASTIC PACKAGE
CASE 751G
(SO–16L)
16
1
Vref 15
1
Sync Input
3
RT
CT
2
Voltage
Feedback 1 4
Compensation 1
5
Drive Output 2
Enable 14
Voltage
Feedback 2 13
Compensation 2
12
Representative Block Diagram
5.0 V
R Reference
R Vref
Undervoltage
Lockout
Oscillator
+
Error
Amp 1
VCC 16
VCC
Undervoltage
Lockout
Latching
PWM 1
Drive
7 Output 1
Current
6 Sense 1
+
Error
Amp 2
Latching
PWM 2
Gnd 8
Drive Gnd 9
This device contains 208 active transistors.
Drive
10 Output 2
Current
11 Sense 2
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
Operating
Temperature Range Package
MC34065DW
MC34065P
SO–16L
TA = 0° to +70°C Plastic DIP
MC33065DW
MC33065P
SO–16L
TA = –40° to +85°C Plastic DIP
MOTOROLA ANALOG IC DEVICE DATA
3–451







MC34065 pdf, 数据表
MC34065 MC33065
Figure 15. Representative Block Diagram
Vin = 15 V
VCC 16
Vref 15
1
Sync Input
3
RT
CT
2
Voltage 4
Feedback 1
5
Compensation 1
2.5 V R
R
Internal
Bias
20 k
Reference
Regulator
+
VCC – +
UVLO –
+
3.6 V
+
Vref
UVLO
Oscillator
+
Error
Amp 1
1.0 mA
2R
Current Sense
Comparator 1
+
0.5 V R
PWM
Latch 1
S
Q
R
17 V
14 V
Drive Output 1
7
Q1
Current Sense 1
6
RS
Drive Enable
14
Voltage
Feedback 2 13
Compensation 2
12
250 µA
+
Error
Amp 2
1.0 mA
2R
0.5 V
Current Sense
Comparator 2
+
R
PWM
Latch 2
S
RQ
R
Drive Output 2
10
Current Sense 2
11
Gnd 8
Drive Gnd 9
+
Figure 16. Timing Diagram
= Sink Only
Positive True Logic
Sync Input
Capacitor CT
Latch 1
“Set” Input
Compensation 1
Current Sense 1
Latch 1
“Reset” Input
Drive Output 1
Drive Output 2
Enable
Latch 2
“Set” Input
Compensation 2
Current Sense 2
Latch 2
“Reset” Input
Drive Output 2
Q2
RS
3–458
MOTOROLA ANALOG IC DEVICE DATA







MC34065 equivalent, schematic
Tape and Reel Configurations
SOIC and Micro–8
DEVICES
Typical
User Direction of Feed
Mechanical Polarization
DPAK and D2PAK
DEVICES
Typical
PLCC DEVICES
Typical
PIN 1
User Direction of Feed
SOT–23 (5 Pin)
DEVICES
Typical
User Direction of Feed
SOT–89 (3 Pin)
DEVICES
Typical
SOT–89 (5 Pin)
DEVICES
Typical
User Direction of Feed
User Direction of Feed
User Direction of Feed
12–2
MOTOROLA ANALOG IC DEVICE DATA










页数 30 页
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