Datasheet MC33023, MC34023 (ON Semiconductor) - 2

link to page 3 MC34023, MC33023 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
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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
PDIP−16
suited for driving a power MOSFET.
P SUFFIX
Also included are protective features consisting of input and 16
CASE 648
reference undervoltage lockouts each with hysteresis, cycle−by−cycle 1 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.
SOIC−16W
16
DW SUFFIX Features CASE 751G
• 50 ns Propagation Delay to Output 1 • High Current Totem Pole Output • Wide Bandwidth Error Amplifier
MARKING DIAGRAMS
• Fully−Latched Logic with Double Pulse Suppression 16 • Latching PWM for Cycle−By−Cycle Current Limiting 16 • Soft−Start Control with Latched Overcurrent Reset MC34023P MC33023DW • Input Undervoltage Lockout with Hysteresis AWLYYWWG AWLYYWWG • Low Startup Current (500 mA Typ) 1 • Internally Trimmed Reference with Undervoltage Lockout 1 • 90% Maximum Duty Cycle (Externally Adjustable) A = Assembly Location WL = Wafer Lot • Precision Trimmed Oscillator YY = Year • Voltage or Current Mode Operation to 1.0 MHz WW = Work Week • Functionally Similar to the UC3823 G = Pb−Free Package • These are Pb−Free Devices
PIN CONNECTIONS
Error Amp 16 15 1 16 Vref V 5.1V Inverting Input ref Reference V Error Amp 4 CC 2 15 VCC Clock Noninverting Input Error Amp Output 3 14 Output 5 UVLO RT Clock 4 13 V 6 Oscillator C CT RT 5 12 Power Ground 13 V Current Limit C 7 C 6 11 T Reference Ramp 14 Output Ramp 7 10 Ground Error Amp 3 Latching 12 Output Current Limit/ PWM Power Soft-Start 8 9 Error Noninverting Shutdown Ground 2 Amp Input (Top View) Inverting 11 1 Input Current
ORDERING INFORMATION
8 9 Limit Ref See detailed ordering and shipping information in the package Soft-Start Soft-Start Current Limit/ dimensions section on page 2 of this data sheet. Shutdown 10 Ground *For additional information on our Pb−Free strategy This device contains 176 active transistors. and soldering details, please download the
Figure 1. Simplified Application
ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. © Semiconductor Components Industries, LLC, 2009
1
Publication Order Number:
July, 2009 − Rev. 7 MC34023/D