TL594_09

UNISONIC TECHNOLOGIES CO., LTD TL594 PULSE-WIDTH-MODULATION CONTROL CIRCUIT DESCRIPTION The UTC TL594 is a PWM (Pulse Width Modulation) control circuit, incorporating two error amplifiers, an on-chip adjustable oscillator, a DTC (Deadtime Control) comparator, a pulse-steering control flip-flop, a regulator rated 5V with 1% accuracy, an UVLO (Undervoltage Lockout) control circuit and an output control circuit. The two error amplifiers have a common-mode voltage varies from -0.3 V to VCC-2 V. The DTC comparator with a fixed-offset offers dead time nearly 5%. The UVLO circuit forbids the output until the internal circuitry is operational. The internal oscillator is used to drive the common circuits in synchronous multiple-rail power supplies, when be bypassed by terminating RT to the reference output and providing an external input of sawtooth to CT. The uncommitted output transistors have the capabilities of either common-emitter or emitter-follower output. The output control can select the push-pull or single-ended output operation for each device. This chip is not allowed to appear the double pulse status for either output during push-pull output operation due to its structure. The UTC TL594 is generally used for the power supply control circuits, which apply to a large area. SOP-16 LINEAR INTEGRATED CIRCUIT DIP-16 FEATURES * Adjustable dead time * Uncommitted outputs transistor rated to 200mA sink or source current * Single-Ended or Push-Pull operation selected by output control * Double pulse is not allowed at either output due to its architecture * 5V Internal reference voltage (1% accuracy) * UVLO under the low VCC status ORDERING INFORMATION Order Number Lead Free TL594L-D16-T TL594L-S16-R Halogen Free TL594G-D16-T TL594G-S16-R Package DIP-16 SOP-16 Packing Tube Tape Reel www.unisonic.com.tw Copyright © 2009 Unisonic Technologies Co., Ltd 1 of 9 QW-R103-031.B TL594 PIN CONFIGURATION 1IN+ 1INFEEDBACK DTC CT RT GND C1 PIN NO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PIN NAME 1IN+ 1INREEDBACK DTC CT RT GND C1 E1 E2 C2 VCC Output CTRL REF 2IN2IN+ 1 2 3 4 5 6 7 8 LINEAR INTEGRATED CIRCUIT 16 15 14 2IN+ 2INREF 13 OUTPUT CTRL 12 11 10 9 VCC C2 E2 E1 DESCRIPTION The noninv input of error amp 1 The inv input of error amp 1 Input of Feedback PWM Comparator The deadtime can be set by changing the voltage of this pin A capacitor connected to this pin sets the fixed switching frequency A resistor connected to this pin sets the fixed switching frequency This is gnd pin Collector of output transistors Q1 Emitter of output transistors Q1 Emitter of output transistors Q2 Collector of output transistors Q2 This pin is connected to the IC supply power. A external signal connect to this pin can control the state of output Internal reference voltage 5V with 1.5% accuracy The inv input of error amp 2 The noninv input of error amp 2 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 9 QW-R103-031.B TL594 BLOCK DIAGRAM LINEAR INTEGRATED CIRCUIT FUNCTION TABLE INPUT Output CTRL VI = 0 VI = VREF OUTPUT FUNCTION Single-Ended or Parallel Output Normal Push-Pull Operation UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 9 QW-R103-031.B TL594 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS (unless otherwise specified)) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC 41 V Amplifier Input Voltage VIN VCC + 0.3 V Collector Output Voltage VC1, VC2 41 V Collector Output Current IC1, IC2 250 mA Junction Temperature TJ +150 °C Operating Temperature TOPR -40 ~ +85 °C Storage Temperature TSTG -65 ~ +150 °C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. THERMAL DATA SYMBOL RATINGS UNIT DIP-16 67 Junction to Ambient (Note) θJA °C/W SOP-16 64 Note: Maximum power dissipation is a function of TJ(MAX), θJA, and Ta. The maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(MAX) -Ta)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability. PARAMETER RECOMMENDED OPERATING CONDITIONS PARAMETER Supply Voltage Amplifier Input Voltage Collector Output Voltage Collector Output Current (Each Transistor) Current Into Feedback Terminal Timing Capacitor Timing Resistor Oscillator Frequency SYMBOL VCC VIN VC1, VC2 IC1, IC2 lFB CT RT fOSC MIN 7 -0.3 TYP. MAX 40 VCC-2 40 200 0.3 10000 500 300 UNIT V V V mA mA nF kΩ kHz 0.47 1.8 1 ELECTRICAL CHARACTERISTICS ( VCC=15V, unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS REFERENCE SECTION Output Voltage (REF) VREF IOUT = 1mA, Ta = 25°C Input Regulation ΔVOUT VCC = 7V~40V, Ta = 25°C Output Regulation ΔVOUT IOUT = 1~10mA, Ta = 25°C Output-Voltage Change with ΔTa =Min~Max Temperature Short-Circuit Output Current (Note) ISC VREF = 0V OSCILLATOR SECTION, CT = 0.01μF, RT = 12KΩ (See Figure 1) Frequency fOSC All values of VCC, CT, RT, and Standard Deviation of Frequency σfOSC (Note) Ta constant Frequency Change With Voltage ΔfOSC(ΔV) VCC = 7V ~ 40V, Ta = 25°C Frequency Change With ΔfOSC (ΔT) ΔTa =Min~Max Temperature DEAD-TIME CONTROL SECTION (See Figure 1) Input Bias Current IIB (DT) VIN= 0 ~ 5.25V Maximum Duty Cycle, Each Output DCMAX DTC = 0V Zero Duty Cycle Input Threshold Voltage VTH Maximum Duty Cycle MIN 4.95 TYP 5 2 14 2 10 35 10 100 1 50 -2 0.45 3 0 3.3 V V -10 MAX 5.05 25 35 10 50 UNIT V mV mV mV/V mA kHz Hz/kHz Hz/kHz Hz/kHz μA UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 9 QW-R103-031.B TL594 ELECTRICAL CHARACTERISTICS(Cont.) LINEAR INTEGRATED CIRCUIT PARAMETER SYMBOL TEST CONDITIONS OUTPUT SECTION Collector-Emitter Common Emitter VSAT(C) VE=0, IC=200mA Saturation Voltage Emitter Follower VSAT(E) VC=15V, IE=−200mA VC=40V, VE=0V, VCC=40V Collector Off-State Current IC(OFF) DTC and Output CTRL = 0V, VC=15V, VE=0V, VCC=1~3V Emitter Off-State Current IE(OFF) VCC=VC=40V, VE=0 Output Control Input Current IOC VIN=VREF PWM COMPARATOR SECTION (See Figure 1) Input Threshold Voltage VTH Zero duty cycle Input Sink Current II(SINK) FEEDBACK = 0.5V UNDERVOLTAGE LOCKOUT SECTION (See Figure 1) Ta = 25°C Threshold Voltage VTH ΔTa =Min~Max Hysteresis VHYS OVERALL DEVICE RT at VREF VCC = 15V Standby Supply Current ISTN-BY All Other Inputs And Outputs Open VCC = 40V Average Supply Current DTC = 2V, See Figure 1 AMPLIFIER SECTION (See Figure 2) Input Offset Voltage, Error Amplifier VI(OFF) FEEDBACK = 2.5V Input Offset Current II(OFF) FEEDBACK = 2.5V Input Bias Current IIB FEEDBACK = 2.5V Common-Mode Input Voltage VICR VCC=7V~40V Range, Error Amplifier ΔVOUT=3V, RL =2kΩ, Open-Loop Voltage Amplification AVOL Gain, Error Amplifier VOUT = 0.5V~3.5V Unity-Gain Bandwidth BW VOUT = 0.5V ~3.5V, RL =2kΩ Common-Mode Rejection Ratio, CMRR VCC = 40V, Ta=25°C Error Amplifier VID =-15mV~-5V, Output Sink Current, FEEDBACK IO(SINK) FEEDBACK = 0.5V VID = 15mV~5V, Output Source Current, FEEDBACK IO(SOURCE) FEEDBACK = 3.5V SWITCHING CHARACTERISTICS, Ta = 25°C Output-Voltage Rise Time Tr Emitter-Follower Configuration (see Figure 3) Output-Voltage Fall Time Tf MIN TYP 1.1 1.5 2 4 MAX 1.3 2.5 100 200 -100 3.5 UNIT V V μA μA μA mA V mA V V mV mA mA mA 0.3 4 0.7 4.5 3.5 100 9 11 12.4 2 25 0.2 0.3 to VCC-2 70 95 800 65 0.3 -2 80 0.7 6 6.9 15 18 10 250 1 mV nA μA V dB kHz dB mA mA 200 400 ns 45 100 ns Output-Voltage Rise Time Tr 100 200 ns Common-Emitter Configuration (see Figure 4) 30 100 ns Output-Voltage Fall Time Tf Note: Standard deviation is a measure of the statistical distribution about the mean, as derived from the formula: σ= ∑N=1( Xn - X)2 n N-1 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 9 QW-R103-031.B TL594 PARAMETER MEASUREMENT INFORMATION VCC=15V LINEAR INTEGRATED CIRCUIT 12 VCC Test Input Test Input 12kΩ 0.01μF 4 DTC C1 8 E1 9 C2 E2 11 10 3 FEEDBACK 6 RT 150Ω 2W 150Ω 2W Output 1 Output 2 5C T 1 IN+ 2 IN16 IN+ Error Amplifiers 15 IN- 13 Output CTRL 50kΩ GND 7 REF 14 Figure 1. Operational Test Circuit Figure 2. Amplifier-Characteristics Test Circuit UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 9 QW-R103-031.B TL594 Test Circuit 15V LINEAR INTEGRATED CIRCUIT PARAMETER MEASUREMENT INFORMATION(Cont.) Output-Voltage Waveform Each Output Circuit 90% 90% 10% Output 68Ω 2W tR tF 10% CL=15pF (Includes Probe and Jig Capacitance ) Figure 3. Emitter-Follower Configuration Test Circuit Output-Voltage Waveform tF tR 90% 90% 10% 10% Figure 4. Common-Emitter Configuration UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 9 QW-R103-031.B TL594 TYPICAL APPLICATIONS INFORMATION LINEAR INTEGRATED CIRCUIT + Note: All capacitors in μF Push-Pull Operation Single-Ended Operation UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 8 of 9 QW-R103-031.B TL594 TYPICAL CHARACTERISTIC LINEAR INTEGRATED CIRCUIT Oscillator Frequency (Hz) Note: Frequency variation (Δf) is the change in oscillator frequency that occurs over the full temperature range. UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 9 of 9 QW-R103-031.B