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MC33066のメーカーはON Semiconductorです、この部品の機能は「(MC33066 / MC34066) High Performance High Performance」です。 |
部品番号 | MC33066 |
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部品説明 | (MC33066 / MC34066) High Performance High Performance | ||
メーカ | ON Semiconductor | ||
ロゴ | |||
このページの下部にプレビューとMC33066ダウンロード(pdfファイル)リンクがあります。 Total 11 pages
www.DataSheet4U.com
MC34066, MC33066
High Performance
Resonant Mode Controllers
The MC34066/MC33066 are high performance resonant mode
controllers designed for off−line and dc−to−dc converter applications
that utilize frequency modulated constant on−time or constant
off−time control. These integrated circuits feature a variable
frequency oscillator with programmable deadtime, precision
retriggerable one−shot timer, temperature compensated reference,
high gain wide−bandwidth error amplifier with a precision output
clamp, steering flip−flop, and dual high current totem pole outputs
ideally suited for driving power MOSFETs.
Also included are protective features consisting of a high speed fault
comparator and latch, programmable soft−start circuitry, input
undervoltage lockout with selectable thresholds, and reference
undervoltage lockout.
These devices are available in dual−in−line and surface mount
packages.
• Variable Frequency Oscillator with a Control Range Exceeding
1000:1
• Programmable Oscillator Deadtime Allows Constant Off−Time
Operation
• Precision Retriggerable One−Shot Timer
• Internally Trimmed Bandgap Reference
• 5.0 MHz Error Amplifier with Precision Output Clamp
• Dual High Current Totem Pole Outputs
• Selectable Undervoltage Lockout Thresholds with Hysteresis
• Enable Input
• Programmable Soft−Start Circuitry
• Low Startup Current for Off−Line Operation
VCC
15
Enable/
UVLO Adjust 9
Osc
Deadtime 1
Osc RC
Osc Control 2
Current 3
One−Shot RC
16
VCC UVLO
Reference
Regulator
Variable
Frequency
Oscillator
One−Shot
Vref UVLO
Steering
Flip−Flop
Aout
Bout
Error Amp
Clamp
Error Amp
Out 6 Error
Amplifier
Error Amp +
8
Error Amp −
7
CSoft−Start
11
Soft−Start
Fault−Detector/
Latch
Figure 1. Simplified Block Diagram
5 Vref
Gnd
4
Drive
14 Output A
Drive
12 Output B
Drive Gnd
13
Fault Input
10
16
1
16
http://onsemi.com
MARKING
DIAGRAMS
16
PDIP−16
P SUFFIX
CASE 648
MC3x066P
AWLYYWW
1
16
SO−16W
DW SUFFIX
CASE 751G
MC33066DW
AWLYYWW
11
x = 3 or 4
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
PIN CONNECTIONS
Osc Deadtime 1
Osc RC 2
Osc Control 3
Current
Gnd 4
Vref 5
Error Amp Out 6
Error Amp 7
Inverting Input
Error Amp 8
Noninverting Input
(Top View)
16 One−Shot RC
15 VCC
14 Drive Output A
13 Drive Gnd
12 Drive Output B
11 CSoft−Start
10 Fault Input
9
Enable/UVLO
Adjust
ORDERING INFORMATION
Device
Package
Shipping
MC34066P
PDIP−16
25 Units/Rail
MC33066DW
SO−16W
47 Units/Rail
MC33066P
PDIP−16
25 Units/Rail
© Semiconductor Components Industries, LLC, 2006
July, 2006 − Rev. 3
1
Publication Order Number:
MC34066/D
1 Page MC34066, MC33066
ELECTRICAL CHARACTERISTICS (continued) (VCC = 12 V [Note 4], ROSC = 95.3 k, RDT = 0 Ω, RVFO = 5.62 k,
COSC = 300 pF, RT = 14.3 k, CT = 300 pF, CL = 1.0 nF, for typical values TA = 25°C, for min/max values TA is the operating ambient
temperature range that applies [Note 5], unless otherwise noted.)
Characteristics
Symbol
Min Typ Max Unit
OSCILLATOR
Frequency (Error Amp Output Low)
TA = 25°C
Total Variation (VCC = 10 V to 18 V, TA = TLow to THigh)
Frequency (Error Amp Output High)
TA = 25°C
Total Variation (VCC = 10 V to 18 V, TA = TLow to THigh)
Oscillator Control Input Voltage, Pin 3 (ISink = 0.5 mA, TA = 25°C)
Output Deadtime (Error Amp Output High)
RDT = 0 Ω
RDT = 1.0 k
fOSC(low)
fOSC(high)
Vin
DT
kHz
90 100 110
85 − 115
kHz
900 1000 1100
850 − 1150
1.3 1.4 1.5
V
− 70 100
600 700 800
ns
ONE−SHOT
Drive Output On−Time (RDT = 1.0 k)
TA = 25°C
Total Variation (VCC = 10 V to 18 V, TA = TLow to THigh)
tOS μs
1.43 1.5 1.57
1.4 − 1.6
DRIVE OUTPUTS
Output Voltage
Low State (ISink = 20 mA)
Low State (ISink = 200 mA)
High State (ISource = 20 mA)
High State (ISource = 200 mA)
VOL − 0.8 1.2
− 1.5 2.0
VOH
9.5 10.3
−
9.0 9.8
−
Output Voltage with UVLO Activated (VCC = 6.0 V, ISink = 1.0 mA)
VOL(UVLO) − 0.8 1.2
Output Voltage Rise Time (CL = 1.0 nF)
tr − 20 50
Output Voltage Fall Time (CL = 1.0 nF)
tf − 20 50
FAULT COMPARATOR
Input Threshold
Vth 0.95 1.0 1.05
Input Bias Current (VPin 10 = 0 V)
IIB
−
−2.0
−10
Propagation Delay to Drive Outputs (100 mV Overdrive)
tPLH(In/Out)
−
60 100
SOFT−START
Capacitor Charge Current (VPin 11 = 2.5 V)
Ichg 4.5 8.1 14
Capacitor Discharge Current (VPin 11 = 2.5 V)
IIdchg
1.0 8.0
−
UNDERVOLTAGE LOCKOUT
Startup Threshold, VCC Increasing
Enable/UVLO Adjust Pin Open
Enable/UVLO Adjust Pin Connected to VCC
Vth(UVLO)
14.8 16 17.2
8.0 9.0 10
Minimum Operating Voltage after Turn−On
Enable/UVLO Adjust Pin Open
Enable/UVLO Adjust Pin Connected to VCC
VCC(min)
8.0 9.0 10
7.6 8.6 9.6
Enable/UVLO Adjust Shutdown Threshold Voltage
Vth(Enable) 6.0 7.0
−
Enable/UVLO Adjust Input Current (Pin 9 = 0V)
Iin(Enable)
−
−0.2
−1.0
TOTAL DEVICE
Power Supply Current (Enable/UVLO Adjust Pin Open)
Startup (VCC = 13.5 V)
Operating (fOSC = 100 kHz) (Note 4)
ICC
− 0.45 0.6
− 21 30
4. Adjust VCC above the Startup threshold before setting to 12 V.
5. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
Tlow = 0°C for MC34066
−40°C for MC33066
Thigh = +70°C for MC34066
+85°C for MC33066
V
V
ns
ns
V
μA
ns
μA
mA
V
V
V
mA
mA
http://onsemi.com
3
3Pages MC34066, MC33066
The maximum oscillator frequency is set by resistor RVFO
in a similar fashion using Equations 1 and 3 in Equation 5:
1
fOSC(max)
= tdchg(min) + tchg
(5)
The value chosen for resistor RDT will affect the peak
voltage of the oscillator waveform. As RDT is increased
from zero, the time required to charge COSC becomes large
with respect to the propagation delay through the oscillator
comparator. Consequently, the overshoot of the upper
threshold is reduced and the peak voltage on the oscillator
waveform drops from 5.1 V to 4.9 V. The best frequency
accuracy is achieved when RDT is zero ohms.
One−Shot Timer
The One−Shot capacitor CT is charged concurrently with
the oscillator capacitor by transistor Q1, as shown in
Figure 3. The One−Shot period begins when the oscillator
comparator turns off Q1, allowing CT to discharge. The
period ends when resistor RT discharges CT to the threshold
of the One−Shot comparator. Discharging CT from an initial
voltage of 5.1 V to a threshold voltage of 3.6 V results in the
One−Shot period given by Equation 6.
tOS = RT CT In
5.1
3.6
= 0.348 RT CT
(6)
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6
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