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Motorola Semiconductors |
Precision SWITCHMODE™
Pulse Width Modulator
Control Circuit
The MC34060A is a low cost fixed frequency, pulse width modulation
control circuit designed primarily for single–ended SWITCHMODE power
supply control.
The MC34060A is specified over the commercial operating temperature
range of 0° to +70°C, and the MC33060A is specified over an automotive
temperature range of –40° to +85°C.
• Complete Pulse Width Modulation Control Circuitry
• On–Chip Oscillator with Master or Slave Operation
• On–Chip Error Amplifiers
• On–Chip 5.0 V Reference, 1.5% Accuracy
• Adjustable Dead–Time Control
• Uncommitted Output Transistor Rated to 200 mA Source or Sink
• Undervoltage Lockout
Order this document by MC34060A/D
MC34060A
MC33060A
PRECISION SWITCHMODE
PULSE WIDTH MODULATOR
CONTROL CIRCUIT
SEMICONDUCTOR
TECHNICAL DATA
14
1
P SUFFIX
PLASTIC PACKAGE
CASE 646
PIN CONNECTIONS
Noninv
Input 1
Inv
Input
2
Compen/PWM
Comp Input
3
Dead–Time
Control
4
+
Error
Amp
–
1
0.1V
+
Error
2 Amp
–
VCC
5.0 V
ref
Noninv
14 Input
13
Inv
Input
12 Vref
11 N.C.
CT 5
RT 6
Ground 7
Oscillator
10 VCC
9C
Q1
8E
(Top View)
MOTOROLA ANALOG IC DEVICE DATA
14
1
D SUFFIX
PLASTIC PACKAGE
CASE 751A
(SO–14)
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
MC34060AD
TA = 0° to +70°C
MC34060AP
SO–14
Plastic DIP
MC33060AD TA = – 40° to +85°C
MC33060AP
SO–14
Plastic DIP
© Motorola, Inc. 1996
Rev 1
1
MC34060A MC33060A
MAXIMUM RATINGS (Full operating ambient temperature range applies, unless otherwise
noted.)
Rating
Symbol
Value
Unit
Power Supply Voltage
Collector Output Voltage
Collector Output Current (Note 1)
Amplifier Input Voltage Range
Power Dissipation @ TA ≤ 45°C
Operating Junction Temperature
Storage Temperature Range
Operating Ambient Temperature Range
For MC34060A
For MC33060A
VCC
VC
IC
Vin
PD
TJ
Tstg
TA
42
42
500
–0.3 to +42
1000
125
–55 to +125
0 to +70
–40 to +85
V
V
mA
V
mW
°C
°C
°C
NOTES: 1. Maximum thermal limits must be observed.
THERMAL CHARACTERISTICS
Characteristics
Thermal Resistance, Junction–to–Ambient
Derating Ambient Temperature
Symbol
RθJA
TA
P Suffix D Suffix
Package Package
80 120
45 45
Unit
°C/W
°C
RECOMMENDED OPERATING CONDITIONS
Condition/Value
Power Supply Voltage
Collector Output Voltage
Collector Output Current
Amplifier Input Voltage
Current Into Feedback Terminal
Reference Output Current
Timing Resistor
Timing Capacitor
Oscillator Frequency
PWM Input Voltage (Pins 3 and 4)
Symbol
VCC
VC
IC
Vin
Ifb
Iref
RT
CT
fosc
–
Min
7.0
–
–
–0.3
–
–
1.8
0.00047
1.0
–0.3
Typ
15
30
–
–
–
–
47
0.001
25
–
Max
40
40
200
VCC –2
0.3
10
500
10
200
5.3
Unit
V
V
mA
V
mA
mA
kΩ
µF
kHz
V
ELECTRICAL CHARACTERISTICS (VCC = 15 V, CT = 0.01 µF, RT = 12 kΩ, unless otherwise noted. For typical values TA = 25°C,
for min/max values TA is the operating ambient temperature range that applies, unless otherwise noted.)
Characteristics
Symbol
Min
Typ
Max Unit
REFERENCE SECTION
Reference Voltage (IO = 1.0 mA, TA 25°C)
TA = Tlow to Thigh – MC34060A
TA = Tlow to Thigh – MC33060A
Line Regulation
(VCC = 7.0 V to 40 V, IO = 10 mA))
Load Regulation
(IO = 1.0 mA to 10 mA)
Short Circuit Output Current
(Vref = 0 V)
Vref 4.925
5.0
5.075
V
4.9 – 5.1
4.85 –
5.1
Regline
–
2.0 25 mV
Regload
–
2.0 15 mV
ISC 15 35 75 mA
2 MOTOROLA ANALOG IC DEVICE DATA
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