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Motorola Electronic Components Datasheet

MC33023 Datasheet

High Speed Single-Ended PWM Controller

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High Speed Single-Ended
PWM Controller
The MC34023 series are high speed, fixed frequency, single–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, and a high current totem pole output ideally
suited for driving a power MOSFET.
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 Output
High Current Totem Pole Output
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 UC3823
Order this document by MC34023/D
MC34023
MC33023
16
1
P SUFFIX
PLASTIC PACKAGE
CASE 648
16
1
DW SUFFIX
PLASTIC PACKAGE
CASE 751G
(SO–16L)
PIN CONNECTIONS
16
Vref
4
Clock
5
RT
6
CT
7
Ramp
Error Amp 3
Output
Noninverting
Input
2
Inverting
Input
1
8
Soft–Start
Simplified Application
Oscillator
5.1V
Reference
UVLO
Latching
Error PWM
Amp
Soft–Start
10 Ground
This device contains 176 active transistors.
MOTOROLA ANALOG IC DEVICE DATA
15
VCC
13
VC
14
Output
12
Power
Ground
11
Current
9
Limit Ref
Current
Limit/
Shutdown
Error Amp
Inverting Input
Error Amp
Noninverting Input
Error Amp Output
1
2
3
16 Vref
15 VCC
14 Output
Clock 4
RT 5
CT 6
Ramp 7
Soft–Start 8
13 VC
12 Power Ground
11 Current Limit
Reference
10 Ground
9 Current Limit/
Shutdown
(Top View)
ORDERING INFORMATION
Device
MC33023P
MC33023DW
MC34023P
Operating
Temperature Range Package
Plastic DIP
TA = – 40° to +105°C
SO–16L
TA = 0° to +70°C Plastic DIP
© Motorola, Inc. 1996
Rev 2
1


Motorola Electronic Components Datasheet

MC33023 Datasheet

High Speed Single-Ended PWM Controller

No Preview Available !

MC34023 MC33023
MAXIMUM RATINGS
Rating
Power Supply Voltage
Output Driver Supply Voltage
Output Current, Source or Sink (Note 1)
DC
Pulsed (0.5 µs)
Current Sense, Soft–Start, Ramp, and Error Amp Inputs
Error Amp Output and Soft–Start Sink Current
Clock and RT Output Current
Power Dissipation and Thermal Characteristics
SO–16L Package (Case 751G)
Maximum Power Dissipation @ TA = + 25°C
Thermal Resistance, Junction–to–Air
DIP Package (Case 648)
Maximum Power Dissipation @ TA = + 25°C
Thermal Resistance, Junction–to–Air
Operating Junction Temperature
Operating Ambient Temperature (Note 2)
MC34023
MC33023
Storage Temperature Range
Symbol
VCC
VC
IO
Vin
IO
ICO
PD
RθJA
PD
RθJA
TJ
TA
Tstg
Value
30
20
0.5
2.0
– 0.3 to +7.0
10
5.0
862
145
1.25
100
+150
0 to +70
– 40 to +105
– 55 to +150
Unit
V
V
A
V
mA
mA
mW
°C/W
W
°C/W
°C
°C
°C
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
REFERENCE SECTION
Reference Output Voltage (IO = 1.0 mA, TJ = + 25°C)
Vref 5.05 5.1 5.15 V
Line Regulation (VCC = 10 V to 30 V)
Regline
2.0 15 mV
Load Regulation (IO = 1.0 mA to 10 mA)
Regload
2.0 15 mV
Temperature Stability
TS – 0.2 – mV/°C
Total Output Variation over Line, Load, and Temperature
Vref 4.95 – 5.25 V
Output Noise Voltage (f = 10 Hz to 10 kHz, TJ = + 25°C)
Long Term Stability (TA = +125°C for 1000 Hours)
Vn – 50 – µV
S – 5.0 – mV
Output Short Circuit Current
ISC – 30 – 65 –100 mA
OSCILLATOR SECTION
Frequency
TJ = + 25°C
Line (VCC = 10 V to 30 V) and Temperature (TA = Tlow to Thigh)
kHz
fosc 380 400 420
370 400 430
Frequency Change with Voltage (VCC = 10 V to 30 V)
fosc/V
0.2 1.0
%
Frequency Change with Temperature (TA = Tlow to Thigh)
fosc/T
2.0
%
Sawtooth Peak Voltage
VOSC(P)
2.6
2.8
3.0
V
Sawtooth Valley Voltage
VOSC(V)
0.7
1.0 1.25
V
Clock Output Voltage
High State
Low State
VOH
VOL
3.9 4.5
– 2.3 2.9
V
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 MC34023
Tlow = – 40°C for MC33023
Thigh = +70°C for MC34023
Thigh = +105°C for MC33023
2 MOTOROLA ANALOG IC DEVICE DATA


Part Number MC33023
Description High Speed Single-Ended PWM Controller
Maker Motorola
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MC33023 Datasheet PDF





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