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MC34166D2T bảng dữ liệu(PDF) 3 Page - ON Semiconductor

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Giải thích chi tiết về linh kiện  POWER SWITCHING REGULATORS
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MC34166, MC33166
http://onsemi.com
3
ELECTRICAL CHARACTERISTICS (VCC = 12 V, for typical values TA = +25°C, for min/max values TA is the operating ambient
temperature range that applies [Notes 4, 5], unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
OSCILLATOR
Frequency (VCC = 7.5 V to 40 V)
TA = +25°C
TA = Tlow to Thigh
fOSC
65
62
72
79
81
kHz
ERROR AMPLIFIER
Voltage Feedback Input Threshold
TA = +25°C
TA = Tlow to Thigh
VFB(th)
4.95
4.85
5.05
5.15
5.2
V
Line Regulation (VCC = 7.5 V to 40 V, TA = +25°C)
Regline
0.03
0.078
%/V
Input Bias Current (VFB = VFB(th) + 0.15 V)
IIB
0.15
1.0
µA
Power Supply Rejection Ratio (VCC = 10 V to 20 V, f = 120 Hz)
PSRR
60
80
dB
Output Voltage Swing
High State (ISource = 75 µA, VFB = 4.5 V)
Low State (ISink = 0.4 mA, VFB = 5.5 V)
VOH
VOL
4.2
4.9
1.6
1.9
V
PWM COMPARATOR
Duty Cycle
Maximum (VFB = 0 V)
Minimum (VComp = 1.9 V)
DC(max)
DC(min)
92
0
95
0
100
0
%
SWITCH OUTPUT
Output Voltage Source Saturation (VCC = 7.5 V, ISource = 3.0 A)
Vsat
(VCC
–1.5)
(VCC
–1.8)
V
Off–State Leakage (VCC = 40 V, Pin 2 = Gnd)
Isw(off)
0
100
µA
Current Limit Threshold
Ipk(switch)
3.3
4.3
6.0
A
Switching Times (VCC = 40 V, Ipk = 3.0 A, L = 375 µH, TA = +25°C)
Output Voltage Rise Time
Output Voltage Fall Time
tr
tf
100
50
200
100
ns
UNDERVOLTAGE LOCKOUT
Startup Threshold (VCC Increasing, TA = +25°C)
Vth(UVLO)
5.5
5.9
6.3
V
Hysteresis (VCC Decreasing, TA = +25°C)
VH(UVLO)
0.6
0.9
1.2
V
TOTAL DEVICE
Power Supply Current (TA = +25°C )
Standby (VCC = 12 V, VComp < 0.15 V)
Operating (VCC = 40 V, Pin 1 = Gnd for maximum duty cycle)
ICC
36
31
100
55
µA
mA
4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
5. Tlow =0°C for MC34166
Thigh = + 70°C for MC34166
=– 40
°C for MC33166
= + 85
°C for MC33166


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