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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。 |
部品番号 | MC33025 |
| |
部品説明 | (MC33025 / MC34025) High Speed Single-Ended PWM Controller | ||
メーカ | ON Semiconductor | ||
ロゴ | |||
このページの下部にプレビューとMC33025ダウンロード(pdfファイル)リンクがあります。 Total 20 pages
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)
www.DataSheet4U.com
• 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 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 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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6
6 Page | |||
ページ | 合計 : 20 ページ | ||
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PDF ダウンロード | [ MC33025 データシート.PDF ] |
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