UNISONIC TECHNOLOGIES CO., LTD TL594

Transcription

1 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 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 V CC status ORDERING INFORMATION Order Number Lead Free Halogen Free Package Packing TL594L-D16-T TL594G-D16-T DIP-16 Tube - TL594G-S16-R SOP-16 Tape Reel 1 of 9 Copyright 2014 Unisonic Technologies Co., Ltd

2 MARKING DIP-16 SOP-16 PIN CONFIGURATION 1IN IN IN- 2IN- FEEDBACK 3 14 REF DTC 4 13 OUTPUT CTRL CT 5 12 V CC RT 6 11 C2 GND 7 10 E2 C1 8 9 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 IN+ The noninv input of error amp 2 UNISONIC TECHNOLOGIES CO., LTD 2 of 9

3 BLOCK DIAGRAM FUNCTION TABLE INPUT Output CTRL V I = 0 V I = V REF Single-Ended or Parallel Output Normal Push-Pull Operation OUTPUT FUNCTION UNISONIC TECHNOLOGIES CO., LTD 3 of 9

4 ABSOLUTE MAXIMUM RATINGS (unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Supply Voltage V CC 41 V Amplifier Input Voltage V IN V CC V Collector Output Voltage V C1, V C2 41 V Collector Output Current I C1, I C2 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 beyond 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 Junction to Ambient (Note) θ JA C/W SOP Note: Maximum power dissipation is a function of T J(MAX), θ JA, and Ta. The maximum allowable power dissipation at any allowable ambient temperature is P D = (T J(MAX) -Ta)/θ JA. Operating at the absolute maximum T J of 150 C can affect reliability. RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL MIN TYP. MAX UNIT Supply Voltage V CC 7 40 V Amplifier Input Voltage V IN -0.3 V CC -2 V Collector Output Voltage V C1, V C2 40 V Collector Output Current (Each Transistor) I C1, I C2 200 ma Current Into Feedback Terminal l FB 0.3 ma Timing Capacitor C T nf Timing Resistor R T kω Oscillator Frequency f OSC khz ELECTRICAL CHARACTERISTICS ( V CC =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 V Input Regulation V OUT V CC = 7V~40V, Ta = 25 C 2 25 mv Output Regulation V OUT I OUT = 1~10mA, Ta = 25 C mv Output-Voltage Change with Temperature Ta =Min~Max 2 10 mv/v Short-Circuit Output Current (Note) I SC V REF = 0V ma OSCILLATOR SECTION, C T = 0.01μF, R T = 12KΩ (See Figure 1) Frequency f OSC 10 khz Standard Deviation of Frequency (Note) σf OSC All values of V CC, C T, R T, and Ta constant 100 Hz/kHz Frequency Change With Voltage f OSC ( V) V CC = 7V ~ 40V, Ta = 25 C 1 Hz/kHz Frequency Change With f OSC ( T) Ta =Min~Max 50 Hz/kHz Temperature DEAD-TIME CONTROL SECTION (See Figure 1) Input Bias Current I IB (DT) V IN = 0 ~ 5.25V μa Maximum Duty Cycle, Each Output DC MAX DTC = 0V 0.45 Zero Duty Cycle V Input Threshold Voltage V TH Maximum Duty Cycle 0 V UNISONIC TECHNOLOGIES CO., LTD 4 of 9

5 ELECTRICAL CHARACTERISTICS(Cont.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT OUTPUT SECTION Collector-Emitter Saturation Voltage Common Emitter V SAT(C) V E =0, I C =200mA V Emitter Follower V SAT(E) V C =15V, I E = 200mA V V C =40V, V E =0V, V CC =40V μa Collector Off-State Current I C(OFF) DTC and Output CTRL = 0V, V C =15V, V E =0V, V CC =1~3V μa Emitter Off-State Current I E(OFF) V CC =V C =40V, V E =0-100 μa Output Control Input Current I OC V IN =V REF 3.5 ma PWM COMPARATOR SECTION (See Figure 1) Input Threshold Voltage V TH Zero duty cycle V Input Sink Current I I(SINK) FEEDBACK = 0.5V ma UNDERVOLTAGE LOCKOUT SECTION (See Figure 1) Threshold Voltage V TH Ta = 25 C 6 V Ta =Min~Max V Hysteresis V HYS 100 mv OVERALL DEVICE Standby Supply Current I STN-BY R T at V REF All Other Inputs V CC = 15V 9 15 ma And Outputs Open V CC = 40V ma Average Supply Current DTC = 2V, See Figure 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 na Input Bias Current I IB FEEDBACK = 2.5V μa Common-Mode Input Voltage Range, Error Amplifier Open-Loop Voltage Amplification Gain, Error Amplifier V ICR A VOL V CC =7V~40V V OUT =3V, R L =2kΩ, V OUT = 0.5V~3.5V 0.3 to V CC -2 V db Unity-Gain Bandwidth B W V OUT = 0.5V ~3.5V, R L =2kΩ 800 khz Common-Mode Rejection Ratio, Error Amplifier CMRR V CC = 40V, Ta=25 C db Output Sink Current, FEEDBACK I O(SINK) V ID =-15mV~-5V, FEEDBACK = 0.5V ma V ID = 15mV~5V, Output Source Current, FEEDBACK I O(SOURCE) FEEDBACK = 3.5V -2 ma SWITCHING CHARACTERISTICS, Ta = 25 C Output-Voltage Rise Time T r Emitter-Follower Configuration ns Output-Voltage Fall Time T f (see Figure 3) ns Output-Voltage Rise Time T r Common-Emitter Configuration ns Output-Voltage Fall Time T f (see Figure 4) ns Note: Standard deviation is a measure of the statistical distribution about the mean, as derived from the formula: σ = N 2 n=1(xn - X) N - 1 UNISONIC TECHNOLOGIES CO., LTD 5 of 9

6 PARAMETER MEASUREMENT INFORMATION V CC =15V Test Input 4 DTC 12 V CC C Ω 2W 150Ω 2W Output 1 Test Input 3 FEEDBACK E1 9 12kΩ 0.01μF 6 5 R T C T 11 C2 E2 10 Output IN+ IN- IN+ IN- Error Amplifiers Output CTRL REF 14 50kΩ GND 7 Figure 1. Operational Test Circuit Figure 2. Amplifier-Characteristics Test Circuit UNISONIC TECHNOLOGIES CO., LTD 6 of 9

7 PARAMETER MEASUREMENT INFORMATION(Cont.) Test Circuit Output-Voltage Waveform 15V Each Output Circuit 90% 90% Output 10% 10% C L =15pF (Includes Probe and Jig Capacitance ) 68Ω 2W t R t F Figure 3. Emitter-Follower Configuration Test Circuit Output-Voltage Waveform t F t R 90% 90% 10% 10% Figure 4. Common-Emitter Configuration UNISONIC TECHNOLOGIES CO., LTD 7 of 9

8 TYPICAL APPLICATIONS INFORMATION + Note: All capacitors in μf Push-Pull Operation Single-Ended Operation UNISONIC TECHNOLOGIES CO., LTD 8 of 9

9 TYPICAL CHARACTERISTIC Oscillator Frequency (Hz) Note: Frequency variation ( f) 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 9 of 9