TL594

TL594 ETL | Alldatasheet

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UNISONIC TECHNOLOGIES CO., LTD TL594 LINEAR INTEGRATED CIRCUIT www.unisonic.com.tw 1 of 9 Copyright © 2009 Unisonic Technologies Co., Ltd QW-R103-031.B 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 Contro l) 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 compar ator 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-f ollower output. The output control can select the push-pull or singl e-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. „ 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 V CC status DIP-16 SOP-16 „ ORDERING INFORMATION Order Number Lead Free Halogen Free Package Packing TL594L-D16-T TL594G-D16-T DIP-16 Tube TL594L-S16-R TL594G-S16-R SOP-16 Tape Reel

TL594 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 2 of 9 www.unisonic.com.tw QW-R103-031.B „ PIN CONFIGURATION 161IN+ 1IN- FEEDBACK DTC CT RT GND 2IN+ 2IN- OUTPUT CTRL VCC REF 8 9C1 E1 PIN NO PIN NAME DESCRIPTION 1 1IN+ The noninv input of error amp 1 2 1IN- The inv input of error amp 1

3 REEDBACK Input of Feedback PWM Comparator

4 DTC The deadtime can be set by changing the voltage of this pin

5 CT A capacitor connected to this pin sets the fixed switching frequency

6 RT A resistor connected to this pin sets the fixed switching frequency

7 GND This is gnd pin

8 C1 Collector of output transistors Q1

9 E1 Emitter of output transistors Q1

10 E2 Emitter of output transistors Q2

11 C2 Collector of output transistors Q2

12 VCC This pin is connected to the IC supply power.

13 Output CTRL A external signal connect to this pin can control the state of output

14 REF Internal reference voltage 5V with 1.5% accuracy 15 2IN- The inv input of error amp 2 16 2IN+ The noninv input of error amp 2

TL594 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 3 of 9 www.unisonic.com.tw QW-R103-031.B „ BLOCK DIAGRAM „ FUNCTION TABLE INPUT Output CTRL OUTPUT FUNCTION VI = 0 Single-Ended or Parallel Output VI = VREF Normal Push-Pull Operation

TL594 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 4 of 9 www.unisonic.com.tw QW-R103-031.B „ ABSOLUTE MAXIMUM RATINGS (unless otherwise specified)) PARAMETER SYMBOL RATINGS UNIT Supply Voltage V CC 41 V Amplifier Input Voltage V IN V CC + 0.3 V Collector Output Voltage V C1, VC2 41 V Collector Output Current I C1, IC2 250 mA Junction Temperature T J +150 °C Operating Temperature T OPR -40 ~ +85 °C Storage Temperature T STG -65 ~ +150 °C Note: Absolute maximum ratings are those values beyo nd which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. „ THERMAL DATA PARAMETER SYMBOL RATINGS UNIT DIP-16 67 Junction to Ambient (Note) SOP-16 θJA 64 °C/W Note: Maximum power dissipation is a function of T J(MAX), θJA, and Ta. The maximum allowable power dissipation at any allowable ambient temperature is P D = (T J(MAX) -Ta)/θJA. Operating at the absolute maximum T J of 150°C can affect reliability. „ RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL MIN TYP. MAX UNIT Supply Voltage VCC 7 40 V Amplifier Input Voltage VIN -0.3 V CC-2 V Collector Output Voltage VC1, VC2 40 V Collector Output Current (Each Transistor) IC1, IC2 200 mA Current Into Feedback Terminal lFB 0.3 mA Timing Capacitor CT 0.47 10000 nF Timing Resistor RT 1.8 500 k Ω Oscillator Frequency fOSC 1 300 kHz „ ELECTRICAL CHARACTERISTICS ( VCC=15V, unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT REFERENCE SECTION Output Voltage (REF) V REF I OUT = 1mA, Ta = 25°C 4.95 5 5.05 V Input Regulation ΔVOUT VCC = 7V~40V, Ta = 25°C 2 25 mV Output Regulation ΔVOUT IOUT = 1~10mA, Ta = 25°C 14 35 mV Output-Voltage Change with Temperature ΔTa =Min~Max 2 10 mV/V Short-Circuit Output Current (Note) ISC VREF = 0V 10 35 50 mA OSCILLATOR SECTION, CT = 0.01μF, RT = 12KΩ (See Figure 1) Frequency fOSC 10 kHz Standard Deviation of Frequency (Note) σfOSC All values of VCC, CT, RT, and Ta constant 100 Hz/kHz Frequency Change With Voltage ΔfOSC(ΔV) VCC = 7V ~ 40V, Ta = 25°C 1 Hz/kHz Frequency Change With Temperature ΔfOSC (ΔT) ΔTa =Min~Max 50 Hz/kHz DEAD-TIME CONTROL SECTION (See Figure 1) Input Bias Current IIB (DT) VIN= 0 ~ 5.25V -2 -10 μA Maximum Duty Cycle, Each Output DCMAX DTC = 0V 0.45 Zero Duty Cycle 3 3.3 V Input Threshold Voltage VTH Maximum Duty Cycle 0 V

TL594 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 5 of 9 www.unisonic.com.tw QW-R103-031.B „ ELECTRICAL CHARACTERISTICS(Cont.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT OUTPUT SECTION Common Emitter VSAT(C) VE=0, IC=200mA 1.1 1.3 V Collector-Emitter Saturation Voltage Emitter Follower VSAT(E) VC=15V, IE=−200mA 1.5 2.5 V VC=40V, VE=0V, VCC=40V 2 100 μA Collector Off-State Current I C(OFF) DTC and Output CTRL = 0V, VC=15V, VE=0V, VCC=1~3V 4 200 μA Emitter Off-State Current IE(OFF) VCC=VC=40V, VE=0 -100 μA Output Control Input Current IOC VIN=VREF 3.5 mA PWM COMPARATOR SECTION (See Figure 1) Input Threshold Voltage VTH Zero duty cycle 4 4.5 V Input Sink Current II(SINK) FEEDBACK = 0.5V 0.3 0.7 mA UNDERVOLTAGE LOCKOUT SECTION (See Figure 1) Ta = 25°C 6 V Threshold Voltage V TH ΔTa =Min~Max 3.5 6.9 V Hysteresis VHYS 100 mV OVERALL DEVICE VCC = 15V 9 15 mA Standby Supply Current I STN-BY RT at VREF All Other Inputs And Outputs Open V CC = 40V 11 18 mA Average Supply Current DTC = 2V, See Figure 1 12.4 mA AMPLIFIER SECTION (See Figure 2) Input Offset Voltage, Error Amplifier V I(OFF) FEEDBACK = 2.5V 2 10 mV Input Offset Current I I(OFF) FEEDBACK = 2.5V 25 250 nA Input Bias Current IIB FEEDBACK = 2.5V 0.2 1 μA Common-Mode Input Voltage Range, Error Amplifier VICR VCC=7V~40V 0.3 to VCC-2 V Open-Loop Voltage Amplification Gain, Error Amplifier AVOL ΔVOUT=3V, RL =2kΩ, VOUT = 0.5V~3.5V 70 95 dB Unity-Gain Bandwidth BW VOUT = 0.5V ~3.5V, RL =2kΩ 800 kHz Common-Mode Rejection Ratio, Error Amplifier CMRR VCC = 40V, Ta=25°C 65 80 dB Output Sink Current, FEEDBACK IO(SINK) VID =-15mV~-5V, FEEDBACK = 0.5V 0.3 0.7 mA Output Source Current, FEEDBACK IO(SOURCE) VID = 15mV~5V, FEEDBACK = 3.5V -2 mA SWITCHING CHARACTERISTICS, Ta = 25°C Output-Voltage Rise Time T r 200 400 ns Output-Voltage Fall Time T f Emitter-Follower Configuration (see Figure 3) 45 100 ns Output-Voltage Rise Time T r 100 200 ns Output-Voltage Fall Time T f Common-Emitter Configuration (see Figure 4) 30 100 ns Note: Standard deviation is a measure of the statistical distribution about the mean, as derived from the formula: 1-N )X-X( 1=n n∑

TL594 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 8 of 9 www.unisonic.com.tw QW-R103-031.B „ TYPICAL APPLICATIONS INFORMATION Note: All capacitors in μF Push-Pull Operation Single-Ended Operation

TL594 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 9 of 9 www.unisonic.com.tw QW-R103-031.B „ TYPICAL CHARACTERISTIC 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.