MC44602 Просмотр технического описания (PDF) - ON Semiconductor
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MC44602 Datasheet PDF : 18 Pages
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MC44602
ELECTRICAL CHARACTERISTICS (VCC and VC = 12 V [Note 2], RT = 10k, CT = 1.0 nF, for typical values TA = 25°C, for min/max
values TA = –25°C to +85°C [Note 3] unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
OUTPUT SECTION
Output Voltage (TA = 25°C)
Low State (ISink = 100 mA)
Low State (ISink = 1.0A)
Low State (ISink = 1.5 A)
VOL
V
–
0.6
0.3
–
1.8
2.0
–
2.1
2.6
High State (ISource = 50 mA)
High State (ISource = 0.5 A)
High State (ISource = 0.75 A)
(VCC–VOH)
–
–
–
1.4
1.7
1.7
2.0
1.8
2.2
Output Voltage with UVLO Activated (VCC = 6.0 V, ISink = 1.0 mA)
VOL(UVLO)
–
0.1
1.1
V
Output Voltage Rise Time (CL = 1.0 nF, TJ = 25°C)
tr
–
50
150
ns
Output Voltage Fall Time (CL = 1.0 nF, TJ = 25°C)
tf
–
50
150
ns
PWM SECTION
Duty Cycle
Maximum
Minimum
%
DC(max)
46
48
50
DC(min)
–
–
0
TOTAL DEVICE
Power Supply Current
Startup (VCC = 5 V)
Operating (Note 2)
TJ = 25° C
TA = –25°C to +85° C
ICC
mA
–
0.2
0.5
–
17
20
10
–
22
Power Supply Zener Voltage (ICC = 25 mA)
VZ
18
20
23
V
OVERLOAD AND SHORT CIRCUIT PROTECTION
Foldback Amplifier Threshold (Figures 9,10)
∆VFB
(VFB–100) (VFB–200) (VFB–300) mV
Load Detect Input
Valid Load Comparator Threshold (VPin 2 Increasing)
Demag Comparator Threshold (VPin 2 Decreasing)
Propagation Delay (Input to Sink or Source Output)
Input Resistance
Vth(VL)
2.0
2.5
Vth(Demag)
50
88
tPLH(in/out)
–
1.1
Rin
12
18
NOTES: 2. Adjust VCC above the startup threshold before setting to 12V.
3. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
3.0
V
120
mV
1.6
µS
30
kΩ
Figure 1. Timing Resistor
versus Oscillator Frequency
80
50
30
20
CT=5.0 nF
10
8.0
CT=10 nF
5.0
CT=500 pF
CT=100 pF
CT=2.0 nF
CT=200 pF
CT=1.0 nF
3.0 VCC = 12 V
2.0 TA = 25°C
Note: Output switches at
1.0 one–half the oscillator frequency.
0.8
10 k
20 k
50 k 100 k
200 k
fOSC, OSCILLATOR FREQUENCY (Hz)
500 k
Figure 2. Output Deadtime
versus Oscillator Frequency
75 1. CT = 10 nF
ÄÄÄÄ 2. CT = 5.0 nF
ÄÄÄÄ 70
3. CT = 2.0 nF
4. CT = 1.0 nF
ÄÄÄÄ 5. CT = 500 pF
6. CT = 100 pF
ÄÄÄÄ ÄÄÄ 65
Note: Output switches at
one–half the oscillator
frequency.
5
4
Ä ÄÄ Ä 3
6
ÄÄ Ä Ä 60
2
Ä ÄÄ 1
Ä 55
50
1.0 M 10 k
20 k
50 k 100 k 200 k
VCC = 12 V
TA = 25°C
500 k 1.0 M
fOSC, OSCILLATOR FREQUENCY (Hz)
4
MOTOROLA ANALOG IC DEVICE DATA
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