MC34060ADR2G ON Semiconductor, MC34060ADR2G Datasheet - Page 6

• Manufacturer Part Number: MC34060ADR2G
• Description: IC CTRLR PWM FF SGL END 14-SOIC
• Manufacturer: ON Semiconductor

Specifications of MC34060ADR2G

• Pwm Type: Voltage Mode
• Number Of Outputs: 1
• Frequency - Max: 200kHz
• Duty Cycle: 100%
• Voltage - Supply: 7 V ~ 40 V
• Buck: Yes
• Boost: Yes
• Flyback: Yes
• Inverting: Yes
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• Frequency-max: 200kHz
• Topology: Flyback
• Output Voltage: 30 V
• Output Current: 200 mA
• Switching Frequency: 200 KHz
• Duty Cycle (max): 96 %
• Operating Supply Voltage: 15 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Fall Time: 40 ns
• Mounting Style: SMD/SMT
• Rise Time: 100 ns
• Synchronous Pin: No
• Number Of Pwm Outputs: 1
• On/off Pin: No
• Adjustable Output: No
• Switching Freq: 200KHz
• Operating Supply Voltage (max): 40V
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 14
• Package Type: SOIC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

the dead−time control, the error amplifier inputs, or the
feed−back input. The dead−time control comparator has an
effective 120 mV input offset which limits the minimum
output dead time to approximately the first 4% of the
sawtooth−cycle time. This would result in a maximum duty
cycle of 96%. Additional dead time may be imposed on the
output by setting the dead time−control input to a fixed
voltage, ranging between 0 V to 3.3 V.
for the error amplifiers to adjust the output pulse width from
the maximum percent on−time, established by the dead time
control input, down to zero, as the voltage at the feedback
500 k
100 k
The control signals are external inputs that can be fed into
The pulse width modulator comparator provides a means
1.0 k
10 k
500
8.0
6.0
4.0
2.0
20
18
16
14
12
10
0
1.0 k
500
1.0 k
2.0 k
Figure 5. Percent Deadtime versus
Figure 3. Oscillator Frequency
versus Timing Resistance
5.0 k 10 k 20 k
f
osc
Oscillator Frequency
, OSCILLATOR FREQUENCY (Hz)
R
T
, TIMING RESISTANCE (W)
1.0 mF
0.001 mF
10 k
C
T
= 0.01 mF
50 k 100 k 200 k 500 k 1.0 M
0.01 mF
APPLICATIONS INFORMATION
C
100 k
T
V
= 0.001 mF
CC
= 15 V
http://onsemi.com
500 k
6
pin varies from 0.5 V to 3.5 V. Both error amplifiers have a
common mode input range from −0.3 V to (V
may be used to sense power supply output voltage and
current. The error−amplifier outputs are active high and are
ORed together at the noninverting input of the pulse−width
modulator comparator. With this configuration, the
amplifier that demands minimum output on time, dominates
control of the loop.
of sourcing up to 10 mA of load currents for external bias
circuits. The reference has an internal accuracy of ±5% with
a typical thermal drift of less than 50 mV over an operating
temperature range of 0° to +70°C.
120
110
100
90
80
70
60
50
40
30
20
10
0
The MC34060A has an internal 5.0 V reference capable
100
1.0
80
60
40
20
Figure 4. Open Loop Voltage Gain and Phase
0
0
10
Figure 6. Percent Duty Cycle versus
Dead−Time Control Voltage
versus Frequency
DEAD-TIME CONTROL VOLTAGE (V)
100
1.0
f, FREQUENCY (Hz)
A
1.0 k
VOL
2.0
10 k
RL = 2.0 kW
VCC = 15 V
DVO = 3.0
V
C
R
q
CC
T
T
100 k
= 0.001
V
= 47 k
= 15 V
CC
−2.0 V), and
3.0
1.0 M
0
-20
-40
-60
-80
-100
-120
-140
-160
-180
3.5