|Datasheet||Download MC34065P datasheet
|Cross ref.||Similar parts: UC1846, UC1846-SP, UC2856, UCC1806, UCC1806-SP, UCC2806, UCC2806M, UCC2810, UCC3806, UCC3810|
High Performance Dual Channel Current Mode Controller
The is a high performance, fixed frequency, dual current mode controllers. It is specifically designed for offline and dctodc converter applications offering the designer a cost effective solution with minimal external components. This integrated circuit feature a unique oscillator for precise duty cycle limit and frequency control, a temperature compensated reference, two high gain error amplifiers, two current sensing comparators, Drive Output 2 Enable pin, and two 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 of each output. The MC34065 and MC33065 are available in dualinline and surface mount packages. Unique Oscillator for Precise Duty Cycle Limit and Frequency ControlHIGH PERFORMANCE DUAL CHANNEL CURRENT MODE CONTROLLER
Current Mode Operation to 500 kHz Automatic Feed Forward Compensation Separate Latching PWMs for CycleByCycle Current Limiting Internally Trimmed Reference with Undervoltage Lockout Drive Output 2 Enable Pin Two High Current Totem Pole Outputs Input Undervoltage Lockout with Hysteresis Low Startup and Operating Current PIN CONNECTIONS Representative Block Diagram
VCC Vref 5.0 V Reference Vref Undervoltage Lockout Oscillator + Error Amp 1 Latching PWM 1 Drive 7 Output 1 VCC Undervoltage Lockout 16Sync Input RT 3 Voltage Feedback 1 4 Compensation 1 5 Current Sense 1 6 Drive Output 1 7 Gnd 8
16 VCC 15 Vref 14 Drive Output 2 Enable 13 Voltage Feedback 2 12 Compensation 2 11 Current Sense 2 10 Drive Output 2 9 Drive Gnd (Top View)
1 Sync Input RT CT Voltage Feedback 1 Compensation 1 5 Drive Output 2 Enable 14 Voltage Feedback 2 13 Compensation Error Amp 2 3
Rating Total Power Supply and Zener Current Output Current, Source or Sink (Note 1) Output Energy (Capacitive Load per Cycle) Current Sense, Enable, and Voltage Feedback Inputs Sync Input High State (Voltage) Low State (Reverse Current) Error Amp Output Sink Current Power Dissipation and Thermal Characteristics DW Suffix, Plastic Package Case 751G Maximum Power Dissipation = 25°C Thermal Resistance, JunctiontoAir P Suffix, Plastic Package Case 648 Maximum Power Dissipation = 25°C Thermal Resistance, JunctiontoAir Operating Junction Temperature Operating Ambient Temperature MC34065 MC33065 Storage Temperature Range
ELECTRICAL CHARACTERISTICS (VCC 15 V [Note = 3.3 nF, for typical values = 25°C, for min/max values TA is the operating ambient temperature range that applies [Note 3].)
Characteristics REFERENCE SECTION Reference Output Voltage (IO = 1.0 mA, = 25°C) Line Regulation (VCC 15 V) Load Regulation (IO to 10 mA) Total Output Variation over Line, Load, and Temperature Output Short Circuit Current OSCILLATOR AND PWM SECTIONS Total Frequency Variation over Line and Temperature VCC TA = Tlow to Thigh MC34065 MC33065 Frequency Change with Voltage (VCC 15 V) Duty Cycle at each Output Maximum Minimum Sync Input Current High State (Vin 2.4 V) Low State (Vin 0.8 V) fosc 46.5 45 fosc/V DCmax DCmin IIH IIL µA kHz Vref Regline Regload Vref ISC V mA Symbol Min Typ Max Unit
NOTES: 1. Maximum package power dissipation limits must be observed. 2. Adjust VCC above the startup threshold before setting V. 3. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible: Tlow = 0°C for the MC34065 Thigh = +70°C for MC34065 Tlow = 40°C for the MC33065 Thigh = +85°C for MC33065 4. This parameter is measured at the latch trip point with VFB V DV Compensation 5. Comparator gain is defined AV DV Current Sense
ELECTRICAL CHARACTERISTICS (continued) (VCC 15 V [Note = 3.3 nF, for typical values = 25°C, for min/max values TA is the operating ambient temperature range that applies [Note 3].)
Characteristics ERROR AMPLIFIERS Voltage Feedback Input (VO 2.5 V) Input Bias Current (VFB 5.0 V) Open Loop Voltage Gain (VO 4.0 V) Unity Gain Bandwidth (TJ = 25°C) Power Supply Rejection Ratio (VCC 15 V) Output Current Source (VO 3.0 V, VFB 2.3 V) Sink (VO 1.2 V, VFB 2.7 V) Output Voltage Swing High State (RL k to ground, VFB 2.3 V) Low State (RL k to Vref, VFB 2.7 V) CURRENT SENSE SECTION Current Sense Input Voltage Gain (Notes 4 and 5) Maximum Current Sense Input Threshold (Note 4) Input Bias Current Propagation Delay (Current Sense Input to Output) DRIVE OUTPUT 2 ENABLE PIN Enable Pin Voltage High State (Output 2 Enabled) Low State (Output 2 Disabled) Low State Input Current (VIL 0 V) DRIVE OUTPUTS Output Voltage Low State (Isink = 20 mA) (Isink = 200 mA) High State (Isource = 20 mA) (Isource = 200 mA) Output Voltage with UVLO Activated (VCC 6.0 V, Isink = 1.0 mA) Output Voltage Rise Time (CL = 1.0 nF) Output Voltage Fall Time (CL = 1.0 nF) UNDERVOLTAGE LOCKOUT SECTION Startup Threshold Minimum Operating Voltage After TurnOn TOTAL DEVICE Power Supply Current Startup (VCC 12 V) Operating (Note 2) Power Supply Zener Voltage (ICC = 30 mA) ICC V mA Vth VCC(min) V VOL VOH VOL(UVLO) ns V VIH VIL IIB Vref µA AV Vth IIB tPLN(In/Out) V/V µA ns VFB IIB AVOL BW PSRR Isource Isink VOH VOL µA dB MHz dB mA Symbol Min Typ Max Unit
NOTES: 1. Maximum package power dissipation limits must be observed. 2. Adjust VCC above the startup threshold before setting V. 3. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible: Tlow = 0°C for the MC34065 Thigh = +70°C for MC34065 Tlow = 40°C for the MC33065 Thigh = +85°C for MC33065 4. This parameter is measured at the latch trip point with VFB V 5. Comparator gain is defined as AV
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