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MC33025 の電気的特性と機能

MC33025のメーカーはON Semiconductorです、この部品の機能は「(MC33025 / MC34025) High Speed Single-Ended PWM Controller」です。


製品の詳細 ( Datasheet PDF )

部品番号 MC33025
部品説明 (MC33025 / MC34025) High Speed Single-Ended PWM Controller
メーカ ON Semiconductor
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MC33025 Datasheet, MC33025 PDF,ピン配置, 機能
MC34025, MC33025
High Speed Double−Ended
PWM Controller
The MC34025 series are high speed, fixed frequency, double−ended
pulse width modulator controllers optimized for high frequency
operation. They are specifically designed for Off−Line and
DC−to−DC converter applications offering the designer a cost
effective solution with minimal external components. These
integrated circuits feature an oscillator, a temperature compensated
reference, a wide bandwidth error amplifier, a high speed current
sensing comparator, steering flip−flop, and dual high current totem
pole outputs ideally suited for driving power MOSFETs.
Also included are protective features consisting of input and
reference undervoltage lockouts each with hysteresis, cycle−by−cycle
current limiting, and a latch for single pulse metering.
The flexibility of this series allows it to be easily configured for
either current mode or voltage mode control.
Features
50 ns Propagation Delay to Outputs
Dual High Current Totem Pole Outputs
Wide Bandwidth Error Amplifier
Fully−Latched Logic with Double Pulse Suppression
Latching PWM for Cycle−By−Cycle Current Limiting
Soft−Start Control with Latched Overcurrent Reset
Input Undervoltage Lockout with Hysteresis
Low Startup Current (500 mA Typ)
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Internally Trimmed Reference with Undervoltage Lockout
45% Maximum Duty Cycle (Externally Adjustable)
Precision Trimmed Oscillator
Voltage or Current Mode Operation to 1.0 MHz
Functionally Similar to the UC3825
Pb−Free Packages are Available*
16
Vref
4
Clock
5
RT
CT
6
7
Ramp
Error Amp 3
Output
Noninverting 2
Input
Inverting
Input 1
8
Soft−Start
Oscillator
Error
Amp
5.1V
Reference
UVLO
Latching
PWM and
Steering
Flip Flop
Soft−Start
10 Ground
This device contains 227 active transistors.
Figure 1. Simplified Application
15
VCC
13
VC
14
Output B
11
Output A
Power
12 Ground
9
Current
Limit/
Shutdown
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16
1
16
1
MARKING
DIAGRAMS
16
PDIP−16
P SUFFIX
CASE 648
MC3x025P
AWLYYWWG
1
16
SO−16WB
DW SUFFIX
CASE 751G
MC3x025DW
AWLYYWWG
1
x = 3 or 4
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
G = Pb−Free Package
PIN CONNECTIONS
Error Amp
Inverting Input
Error Amp
Noninverting Input
Error Amp Output
1
2
3
16 Vref
15 VCC
14 Output B
Clock
RT
CT
Ramp
Soft−Start
4 13
5 12
6 11
7 10
89
(Top View)
VC
Power Ground
Output A
Ground
Current Limit/
Shutdown
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 18 of this data sheet.
*For additional information on our Pb−Free strategy
and soldering details, please download the
ON Semiconductor Soldering and Mounting
Techniques Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2005
October, 2005 − Rev. 7
1
Publication Order Number:
MC34025/D

1 Page





MC33025 pdf, ピン配列
MC34025, MC33025
ELECTRICAL CHARACTERISTICS (VCC = 15 V, RT = 3.65 kW, CT = 1.0 nF, for typical values TA = + 25°C, for min/max values
TA is the operating ambient temperature range that applies [Note 4], unless otherwise noted.)
Characteristic
Symbol Min Typ Max Unit
ERROR AMPLIFIER SECTION
Input Offset Voltage
Input Bias Current
Input Offset Current
Open−Loop Voltage Gain (VO = 1.0 V to 4.0 V)
Gain Bandwidth Product (TJ = + 25°C)
Common Mode Rejection Ratio (VCM = 1.5 V to 5.5 V)
Power Supply Rejection Ratio (VCC = 10 V to 30 V)
Output Current,
Source (VO = 4.0 V)
Sink (VO = 1.0 V)
Output Voltage Swing,
High State (IO = − 0.5 mA)
Low State (IO = 1.0 mA)
Slew Rate
VIO
IIB
IIO
AVOL
GBW
CMRR
PSRR
ISource
ISink
VOH
VOL
SR
− − 15 mV
− 0.6 3.0 mA
− 0.1 1.0 mA
60 95
− dB
4.0 8.3
− MHz
75 95
− dB
85 110
− dB
0.5 3.0
1.0 3.6
− mA
4.5 4.75 5.0
0 0.4 1.0
V
6.0 12
− V/ms
PWM COMPARATOR SECTION
Ramp Input Bias Current
Duty Cycle of Each Output,
Maximum
Minimum
Zero Duty Cycle Threshold Voltage Pin 3(4) (Pin 7(9) = 0 V)
Propagation Delay (Ramp Input to Output, TJ = + 25°C)
SOFT−START SECTION
Charge Current (VSoft−Start = 0.5 V)
Discharge Current (VSoft−Start = 1.5 V)
CURRENT SENSE SECTION
Input Bias Current (Pin 9(12) = 0 V to 4.0 V)
Current Limit Comparator Threshold
Shutdown Comparator Threshold
Propagation Delay (Current Limit/Shutdown to Output, TJ = + 25°C)
OUTPUT SECTION
Output Voltage
Low State
High State
(ISink = 20 mA)
(ISink = 200 mA)
(ISource = 20 mA)
(ISource = 200 mA)
Output Voltage with UVLO Activated (VCC = 6.0 V, ISink = 0.5 mA)
Output Leakage Current (VC = 20 V)
Output Voltage Rise Time (CL = 1.0 nF, TJ = + 25°C)
Output Voltage Fall Time (CL = 1.0 nF, TJ = + 25°C)
UNDERVOLTAGE LOCKOUT SECTION
Startup Threshold (VCC Increasing)
UVLO Hysteresis Voltage (VCC Decreasing After Turn−On)
TOTAL DEVICE
Power Supply Current
Startup (VCC = 8.0 V)
Operating
IIB
DC(max)
DC(min)
Vth
tPLH(in/out)
Ichg
Idischg
IIB
Vth
Vth
tPLH(in/out)
VOL
VOH
VOL(UVLO)
IL
tr
tf
Vth(on)
VH
ICC
40
1.1
3.0
1.0
0.9
1.25
13
12
8.8
0.4
− 0.5
45
1.25
60
9.0
4.0
1.0
1.40
50
0.25
1.2
13.5
13
0.25
100
30
30
9.2
0.8
0.5
25
− 5.0
0
1.4
100
20
15
1.10
1.55
80
0.4
2.2
1.0
500
60
60
9.6
1.2
1.2
35
mA
%
V
ns
mA
mA
mA
V
ns
V
V
mA
ns
ns
V
V
mA
3. Maximum package power dissipation limits must be observed.
4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
Tlow = 0°C for MC34025
Tlow = − 40°C for MC33025
Thigh = +70°C for MC34025
Thigh = +105°C for MC33025
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3


3Pages


MC33025 電子部品, 半導体
MC34025, MC33025
10
VCC = 15 V
9.5
9.0
8.5
8.0
7.5
7.0
−55 −25 0 25 50 75 100 125
TA, AMBIENT TEMPERATURE (°C)
Figure 14. Soft−Start Charge Current
versus Temperature
0
VCC
−1.0
VCC = 15 V
80 ms Pulsed Load
−2.0 120 Hz Rate
TA = + 25°C
2.0
Source Saturation
(Load to Ground)
1.0
0
Ground
Sink Saturation
(Load to VCC)
0 0.2 0.4 0.6 0.8 1.0
IO, OUTPUT LOAD CURRENT (A)
Figure 15. Output Saturation Voltage
versus Load Current
OUTPUT RISE & FALL TIME 1.0 nF LOAD
50 ns/DIV
Figure 16. Drive Output Rise and Fall Time
OUTPUT RISE & FALL TIME 10.0 nF LOAD
50 ns/DIV
Figure 17. Drive Output Rise and Fall Time
30
25 RT = 3.65 kW
CT = 1.0 nF
20
VCC Increasing
15
VCC Decreasing
10
5.0
0
0 4.0 8.0 12 16 20
VCC, SUPPLY VOLTAGE (V)
Figure 18. Supply Voltage versus Supply Current
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