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Part: MC33025
Category:
Power Management
-> PWM Controllers
-> Others
Description: High Speed Double-ended PWM Controller
Company: ON Semiconductor
Datasheet: Download MC33025 datasheet File size : 82 kB
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Datasheet text preview:
MC34025, MC33025 High Speed Double-Ended PWM Controller
The MC34025 series are high speed, fixed frequency, doubleended pulse width modulator controllers optimized for high frequency o p e r a t i o n . They are specifically designed for OffLine and DCtoDC converter applications offering the designer a cost e ff e c t i v e 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 flipflop, 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, cyclebycycle 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 · FullyLatched Logic with Double Pulse Suppression · Latching PWM for CycleByCycle Current Limiting · SoftStart Control with Latched Overcurrent Reset · Input Undervoltage Lockout with Hysteresis · Low StartUp Current (500 mA Typ) · 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
Vref Clock RT CT 16 4 5 Oscillator 6 7 5.1V Reference UVLO 13 14 Latching PWM and Steering Flip Flop VC Output B 11 15 VCC
http://onsemi.com MARKING DIAGRAMS
16 PDIP16 P SUFFIX CASE 648 1 1 16 SO16L DW SUFFIX CASE 751G 1 1 x A WL YY WW = 3 or 4 = Assembly Location = Wafer Lot = Year = Work Week MC3x025DW AWLYYWW MC3x025P AWLYYWW
16
16
PIN CONNECTIONS
Error Amp Inverting Input Error Amp Noninverting Input Error Amp Output Clock RT CT Ramp Soft-Start
1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9
Vref VCC Output B VC Power Ground Output A Ground Current Limit/ Shutdown
Ramp Error Amp 3 Output Noninverting 2 Input Inverting Input 1 Soft-Start 8
(Top View)
Error Amp
ORDERING INFORMATION
Device MC33025DW MC33025DWR2 MC33025P MC34025DW MC34025DWR2 MC34025P Package SO16L SO16L PDIP16 SO16L SO16L PDIP16 Shipping 47 Units/Rail 1000 Tape & Reel 25 Units/Rail 47 Units/Rail 1000 Tape & Reel 25 Units/Rail
Output A Power 12 Ground 9 Current Limit/ Shutdown
Soft-Start 10 Ground This device contains 227 active transistors.
Figure 1. Simplified Application
© Semiconductor Components Industries, LLC, 2002
1
October, 2002 Rev. 5
Publication Order Number: MC34025/D
MC34025, MC33025
MAXIMUM RATINGS
Rating Power Supply Voltage Output Driver Supply Voltage Output Current, Source or Sink (Note 1) DC Pulsed (0.5 ms) Current Sense, SoftStart, Ramp, and Error Amp Inputs Error Amp Output and SoftStart Sink Current Clock and RT Output Current Power Dissipation and Thermal Characteristics SO16 Package (Case 751G) Maximum Power Dissipation @ TA = +25°C Thermal Resistance, JunctiontoAir DIP Package (Case 648) Maximum Power Dissipation @ TA = +25°C Thermal Resistance, JunctiontoAir Operating Junction Temperature Operating Ambient Temperature (Note 2) MC34025 MC33025 Storage Temperature Range Symbol VCC VC IO 0.5 2.0 Vin IO ICO 0.3 to +7.0 10 5.0 V mA mA Value 30 25 Unit V V A
PD Rq J A PD Rq J A TJ TA Tstg
862 145 1.25 100 +150 0 to +70 40 to +105 55 to +150
mW °C/W W °C/W °C °C
°C
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 2], unless otherwise noted.) Characteristic REFERENCE SECTION Reference Output Voltage (IO = 1.0 mA, TJ = +25°C) Line Regulation (VCC = 10 V to 30 V) Load Regulation (IO = 1.0 mA to 10 mA) Temperature Stability Total Output Variation over Line, Load, and Temperature Output Noise Voltage (f = 10 Hz to 10 kHz, TJ = +25°C) Long Term Stability (TA = +125°C for 1000 Hours) Output Short Circuit Current OSCILLATOR SECTION Frequency TJ = +25°C Line (VCC = 10 V to 30 V) and Temperature (TA = Tlow to Thigh) Frequency Change with Voltage (VCC = 10 V to 30 V) Frequency Change with Temperature (TA = Tlow to Thigh) Sawtooth Peak Voltage Sawtooth Valley Voltage Clock Output Voltage High State Low State kHz fosc Dfosc/DV Dfosc/DT VP VV VOH VOL 380 370 2.6 0.7 3.9 400 400 0.2 2.0 2.8 1.0 4.5 2.3 420 430 1.0 3.0 1.25 2.9 % % V V V Vref Regline Regload TS Vref Vn S ISC 5.05 4.95 30 5.1 2.0 2.0 0.2 50 5.0 65 5.15 15 15 5.25 100 V mV mV mV/°C V mV mV mA Symbol Min Typ Max Unit
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. Thigh = +70°C for MC34025 Tlow = 0°C for MC34025 Tlow = 40°C for MC33025 Thigh = +105°C for MC33025
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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 ERROR AMPLIFIER SECTION Input Offset Voltage Input Bias Current Input Offset Current OpenLoop 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, Output Voltage Swing, Slew Rate PWM COMPARATOR SECTION Ramp Input Bias Current Duty Cycle of Each Output, Zero Duty Cycle Threshold Voltage Pin 3(4) (Pin 7(9) = 0 V) Propagation Delay (Ramp Input to Output, TJ = +25°C) SOFTSTART SECTION Charge Current (VSoftStart = 0.5 V) Discharge Current (VSoftStart = 1.5 V) CURRENT SENSE SECTION Input Bias Current (Pin 9(12) = 0 V to 4.0 V) Current Limit Comparator Threshold Com arator Shutdown Comparator Threshold Propagation Delay (Current Limit/Shutdown to Output, TJ = +25°C) OUTPUT SECTION Output Voltage Low State High State V (ISink = 20 mA) (ISink = 200 mA) (ISource = 20 mA) (ISource = 200 mA) VOL VOH VOL(UVLO) IL tr tf 13 12 0.25 1.2 13.5 13 0.25 100 30 30 0.4 2.2 1.0 500 60 60 V mA ns ns IIB Vth Vth tPLH(in/out) 0.9 1.25 1.0 1.40 50 15 1.10 1.55 80 mA V ns Ichg Idischg 3.0 1.0 9.0 4.0 20 mA mA Maximum Minimum IIB DC(max) DC(min) Vth tPLH(in/out) 40 1.1 0.5 45 1.25 60 5.0 0 1.4 100 mA % V ns Source (VO = 4.0 V) Sink (VO = 1.0 V) High State (IO = 0.5 mA) Low State (IO = 1.0 mA) 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 0.6 0.1 95 8.3 95 110 3.0 3.6 4.75 0.4 12 15 3.0 1.0 5.0 1.0 mV mA mA dB MHz dB dB mA V V/ms Symbol Min Typ Max Unit
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 TurnOn) TOTAL DEVICE Power Supply Current StartUp (VCC = 8.0 V) Operating
Vth(on) VH
8.8 0.4
9.2 0.8
9.6 1.2
V V
ICC 0.5 25 1.2 35
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. Thigh = +70°C for MC34025 Tlow = 0°C for MC34025 Tlow = 40°C for MC33025 Thigh = +105°C for MC33025
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