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MC33025 の電気的特性と機能

MC33025のメーカーはMotorola Semiconductorsです、この部品の機能は「High Speed Double-Ended PWM Controller」です。


製品の詳細 ( Datasheet PDF )

部品番号 MC33025
部品説明 High Speed Double-Ended PWM Controller
メーカ Motorola Semiconductors
ロゴ Motorola Semiconductors ロゴ 




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MC33025 Datasheet, MC33025 PDF,ピン配置, 機能
High Speed Double-Ended
PWM Controller
Order this document by MC34025/D
MC34025
MC33025
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.
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 Start–Up Current (500 µA Typ)
Internally Trimmed Reference with Undervoltage Lockout
90% Maximum Duty Cycle (Externally Adjustable)
Precision Trimmed Oscillator
Voltage or Current Mode Operation to 1.0 MHz
Functionally Similar to the UC3825
16
Vref
4
Clock
5
RT
CT
6
7
Ramp
Error Amp 3
Output
Noninverting 2
Input
Inverting
Input 1
8
Soft–Start
Simplified Application
Oscillator
5.1V
Reference
UVLO
Latching
PWM and
Error
Amp
Steering
Flip Flop
Soft–Star
t
10 Ground
This device contains 227 active transistors.
15
VCC
13
VC
14
Output B
11
Output A
Power
12 Ground
9
Current
Limit/
Shutdown
16
1
P SUFFIX
PLASTIC PACKAGE
CASE 648
16
1
DW SUFFIX
PLASTIC PACKAGE
CASE 751G
(SO–16L)
PIN CONNECTIONS
Error Amp
Inverting Input
Error Amp
Noninverting Input
Error Amp Output
1
2
3
16 Vref
15 VCC
14 Output B
Clock 4
RT 5
13 VC
12 Power Ground
CT 6
Ramp 7
Soft–Start 8
11 Output A
10 Ground
9 Current Limit/
Shutdown
(Top View)
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
MC33025DW
SO–16L
TA = – 40° to +105°C
MC33025P
Plastic DIP
MC34025DW
MC34025P
TA = 0° to +70°C
SO–16L
Plastic DIP
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1996
Rev 1
1

1 Page





MC33025 pdf, ピン配列
MC34025 MC33025
ELECTRICAL CHARACTERISTICS (VCC = 15 V, RT = 3.65 k, CT = 1.0 nF, for typical values TA = + 25°C, for min/max values
TA is the operating ambient temperature range that applies [Note 2], 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)
Output Current, Sink (VO = 1.0 V)
Output Voltage Swing, High State (IO = – 0.5 mA)
Output Voltage Swing, Low State (IO = 1.0 mA)
Slew Rate
PWM COMPARATOR SECTION
Ramp Input Bias Current
Duty Cycle, Maximum
Duty Cycle, Minimum
Zero Duty Cycle Threshold Voltage Pin 3(4) (Pin 7(9) = 0 V)
Propagation Delay (Ramp Input to Output, TJ = + 25°C)
SIFT–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
Start–Up Threshold (VCC Increasing)
UVLO Hysteresis Voltage (VCC Decreasing After Turn–On)
TOTAL DEVICE
Power Supply Current
Start–Up (VCC = 8.0 V)
Operating
VIO
IIB
IIO
AVOL
GBW
CMRR
PSRR
ISource
ISink
VOH
VOL
SR
60
4.0
75
85
0.5
1.0
4.5
0
6.0
IIB
DC(max)
DC(min)
Vth
tPLH(in/out)
Ichg
Idischg
IIB
Vth
Vth
tPLH(in/out)
80
1.1
3.0
1.0
0.9
1.25
VOL
VOH
VOL(UVLO)
IL
tr
tf
Vth(on)
VH
ICC
13
12
8.8
0.4
0.6
0.1
95
8.3
95
110
3.0
3.6
4.75
0.4
12
– 0.5
90
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
15
3.0
1.0
5.0
1.0
– 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
mV
µA
µA
dB
MHz
dB
dB
mA
V
V/µs
µA
%
V
ns
µA
mA
µA
V
ns
V
V
µA
ns
ns
V
V
mA
NOTES: 1. Maximum package power dissipation limits must be observed.
2. 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
MOTOROLA ANALOG IC DEVICE DATA
3


3Pages


MC33025 電子部品, 半導体
MC34025 MC33025
Figure 13. Soft–Start Charge Current
versus Temperature
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. Output Saturation Voltage
versus Load Current
0
VCC
–1.0
VCC = 15 V
80 µs Pulsed Load
Source Saturation
(Load to Ground)
–2.0 120 Hz Rate
TA = + 25°C
2.0
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. Drive Output Rise and Fall Time
Figure 16. Drive Output Rise and Fall Time
OUTPUT RISE & FALL TIME 1.0 nF LOAD
50 ns/DIV
OUTPUT RISE & FALL TIME 10.0 nF LOAD
50 ns/DIV
Figure 17. Supply Voltage versus Supply Current
30
25 RT = 3.65 k
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)
6 MOTOROLA ANALOG IC DEVICE DATA

6 Page



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