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| ISSUED DATE :2003/05/26 REVISED DATE :2004/10/05B GDTL494 Description V O LTA G E M O D E P WM C O N T R O L C I R C U I T The GDTL494 incorporates all the functions required in the construction of a pulse-width modulation switching circuit. Designed Primarily for switching power supply control or DC-DC convectors, it offers the systems engineer the flexibility to tailor control circuitry to its own application. *Complete PWM power control circuitry *Uncommitted outputs for 200 mA sink or source current *Output control selects single ended or push pull operation *Internal circuitry prohibits double pulses over total range. *Easy synchronization. Features Package Dimensions REF. A A1 A2 b b1 b2 b3 c Millimeter Min. Max. 0.381 3.175 0.406 0.356 1.270 0.762 0.203 5.334 3.429 0.508 0.508 1.778 1.143 0.356 REF. c1 D E E1 e HE L S Millimeter Min. Max. 0.203 18.92 6.096 7.493 2.413 8.509 3.175 0 0.279 19.69 6.604 8.001 2.667 9.525 3.683 15 Absolute Maximum Ratings (Unless otherwise noted all is over operating free air temperature range) PARAMETER Supply Voltage (note1) Amplifier Input Voltage Collector output Voltage Collector output Current Continuous Total Dissipation at (or for below) 25 : free air Temperature(note 2) Operating Temperature Range Storage Temperature Range Lead Temperature 1.6mm from Case for 60 Sec. Vcc Vi Vo Ico PD Topr Tstg Tcase SYMBOL 41 Vcc+0.3 41 250 1000 0 TO 70 -65 TO 150 300 VALUE V V V mA mW : : : UNIT Note1: All voltage values, except differential voltages are with respect to the network ground terminal. Note2:For operation above 25 : free-air temperature, the dissipation derates with 9.2mW/ : . 1/5 ISSUED DATE :2003/05/26 REVISED DATE :2004/10/05B Recommended Operating Conditions Parameter Supply Voltage Amplifier Input Voltage Collector Output Voltage Collector Output Current(each Transistor) Current into Feedback Timing Capacitor Timing Resistor Oscillator Frequency Operating Free-Air Temperature Symbol MIN Vcc Vi Vo Ic If CT RT fosc Ta 0.47 1.8 1 0 7 -0.3 VALUE MAX 40 Vcc-2 40 200 0.3 10000 500 300 70 V V V mA mA nF k kHz : Unit Electrical Characteristics (Over recommended operating free-air temperature range, Vcc=15V, f=1kHz, Unless otherwise specified) Parameter Reference Section Output Voltage Input Regulation Output Regulation Output Voltage Change with Temperature Short-Circuit Output Current Oscillator Section Frequency Standard Deviation of Frequency Frequency Change with Voltage Frequency Change with Temperature Amplifier Section Input Offset Voltage Input Offset Current Input Bias Current Common-Mode Input Voltage Range Error Error Vo(pin 3)=2.5v Vo(pin 3)=2.5v Vo(pin 3)=2.5v Vcc=7V to 40V -0.3 to Vcc-2 2 25 0.2 10 250 1 mV nA A V CT=0.01 f,RT=120k All Values of Vcc CT,RT,TA constant Vcc=7v to 40v , Ta = 25 : CT=0.01 f,RT=12 k , TA=MIN to MAX 10 10 0.1 12 kHz % % % Io=1mA Vcc = 7to 40 V Io=1 to 10mA TA=MIN to MAX(note2) Vref=0 4.75 5 2 1 0.2 35 5.25 25 15 1 V mV mV % mA Test Conditions Min Typ. Max. Unit 2/5 ISSUED DATE :2003/05/26 REVISED DATE :2004/10/05B Open-Loop Voltage Amplification Unity-Gain Bandwidth Common-Mode Rejection Ratio Error Output Sink Current(pin 3) Output source Current(pin 3) Output Section Collector off-state current Emitter off-state current Collector-Emitter saturation Common-Emitter Voltage Emitter-Follower Output Control Input Current Dead Time Control Section Input bias(pin 4) Maximum duty cycle, each output Input threshold Voltage (pin 4) PWM comparator Section Input Threshold Voltage(pin 3) Input Sink current (pin 3) Total Device Standby supply current Average supply current Switching Characteristics, Ta = 25 : Output Voltage Rise Time Output Voltage Fall Time Output Voltage Rise Time Output Voltage Fall Time Note 1 Note 2 Note 3 Note 4 Vcc=15V Vcc=40V Vo=3v,Vo=0.5V to 3.5V Vcc=40V,TA=25 : VID=-15mV to -5V V(pin 3)=0.5V VID=15Mv to -5V V(pin 3)=3.5V VCE=40V,Vcc=40v Vcc=Vc=40V,VE=0 VE=0,Ic=200mA Vc=15V,IE=-200mA Vi=Vref Vi=0 to 5.25 V VI(pin 4)=0 Zero duty cycle Maximum duty cycle Zero Duty cycle V(pin 3)=0.7V Pin 6 at Vref,all other Input s and outputs open V pin 4 =2V 70 65 0.3 -2 95 800 80 0.7 dB kHz dB mA mA 2 1.1 1.5 100 -100 1.3 2.5 3.5 A A V mA A % V -2 45 3 0 4 0.3 0.7 6 9 7.5 100 25 100 40 -10 3.3 4.5 V mA 10 15 mA mA Common-emitter configuration Emitter-follower configuration 200 100 200 100 ns ns ns ns All typical values except for temperature coefficient are at Ta=25 : . For conditions shown as MIN or MAX, use appropriate value under recommended operating conditions. Duration of the short -circuit should not exceed one second. Standard deviation is a measure of the statistical distribution the mean as derived from the formula: 3/5 ISSUED DATE :2003/05/26 REVISED DATE :2004/10/05B 4/5 ISSUED DATE :2003/05/26 REVISED DATE :2004/10/05B Important Notice: All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of GTM. GTM reserves the right to make changes to its products without notice. GTM semiconductor products are not warranted to be suitable for use in life-support Applications, or systems. GTM assumes no liability for any consequence of customer product design, infringement of patents, or application assistance. Head Office And Factory: Taiwan: No. 17-1 Tatung Rd. Fu Kou Hsin-Chu Industrial Park, Hsin-Chu, Taiwan, R. O. C. TEL : 886-3-597-7061 FAX : 886-3-597-9220, 597-0785 China: (201203) No.255, Jang-Jiang Tsai-Lueng RD. , Pu-Dung-Hsin District, Shang-Hai City, China TEL : 86-21-5895-7671 ~ 4 FAX : 86-21-38950165 5/5 |
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