ISSUED DATE :2003/05/26 REVISED DATE :2004/10/05B GDTL494 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 Description 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. Features *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. 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 REF. c1 D E E1 e HE L S 5.334 3.429 0.508 0.508 1.778 1.143 0.356 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 SYMBOL VALUE V Supply Voltage (note1) Vcc 41 Amplifier Input Voltage Vi Vcc+0.3 V Collector output Voltage Vo 41 V Collector output Current Ico 250 mA Continuous Total Dissipation at (or for below) free air Temperature(note 2) 25 PD 1000 mW Operating Temperature Range Topr 0 TO 70 Storage Temperature Range Tstg -65 TO 150 Lead Temperature 1.6mm from Case for 60 Sec. Tcase 300 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 Symbol VALUE Unit MIN MAX Vcc 7 40 Amplifier Input Voltage Vi -0.3 Vcc-2 V Collector Output Voltage Vo 40 V Collector Output Current(each Transistor) Ic 200 mA Current into Feedback If 0.3 mA Supply Voltage V Timing Capacitor CT 0.47 10000 Timing Resistor RT 1.8 500 k fosc 1 300 kHz Ta 0 70 Oscillator Frequency Operating Free-Air Temperature nF Electrical Characteristics (Over recommended operating free-air temperature range, Vcc=15V, f=1kHz, Unless otherwise specified) Parameter Test Conditions Min Typ. Max. Unit Reference Section Output Voltage Io=1mA Input Regulation Vcc = 7to 40 V Output Regulation Io=1 to 10mA Output Voltage Change with Temperature Short-Circuit Output Current 4.75 TA=MIN to MAX(note2) 5 5.25 V 2 25 mV 1 15 mV 0.2 1 % Vref=0 35 mA Frequency CT=0.01 f,RT=120k 10 kHz Standard Deviation of Frequency All Values of Vcc C T,R T,TA constant 10 % Frequency Change with Voltage Vcc=7v to 40v , Ta = 25 0.1 % Frequency Change with Temperature CT=0.01 f,R T=12 k , TA=MIN to MAX Oscillator Section 12 % Amplifier Section Input Offset Voltage Error 2 10 mV Input Offset Current Vo(pin 3)=2.5v Vo(pin 3)=2.5v 25 250 nA Input Bias Current Vo(pin 3)=2.5v 0.2 1 Common-Mode Input Voltage Range Vcc=7V to 40V Error -0.3 to Vcc-2 A V 2/5 ISSUED DATE :2003/05/26 REVISED DATE :2004/10/05B Open-Loop Voltage Amplification Vo=3v,Vo=0.5V to 3.5V 70 95 dB 800 kHz 65 80 dB 0.3 0.7 mA Unity-Gain Bandwidth Common-Mode Rejection Ratio Error Vcc=40V,TA=25 Output Sink Current(pin 3) VID=-15mV to –5V Output source Current(pin 3) Output Section VID=15Mv to –5V V(pin 3)=3.5V Collector off-state current VCE=40V,Vcc=40v Emitter off-state current Vcc=Vc=40V,VE=0 Collector-Emitter saturation Common-Emitter Voltage Emitter-Follower VE=0,Ic=200mA 1.1 1.3 Vc=15V,IE=-200mA 1.5 2.5 Output Control Input Current Vi=Vref V(pin 3)=0.5V -2 mA 2 100 -100 3.5 A A V mA Dead Time Control Section Input bias(pin 4) Vi=0 to 5.25 V Maximum duty cycle, each output VI(pin 4)=0 Input threshold Voltage (pin 4) Zero duty cycle Maximum duty cycle -2 -10 45 A % 3 3.3 4 4.5 V 0 PWM comparator Section Input Threshold Voltage(pin 3) Zero Duty cycle Input Sink current (pin 3) V(pin 3)=0.7V 0.3 0.7 V mA Total Device Standby supply current Vcc=15V Vcc=40V Average supply current Pin 6 at Vref,all other Input s and outputs open V pin 4 =2V 6 10 9 15 7.5 mA mA Switching Characteristics, Ta = 25 Output Voltage Rise Time Output Voltage Fall Time Output Voltage Rise Time Output Voltage Fall Time Common-emitter configuration Emitter-follower configuration 100 200 25 100 ns 100 200 ns 40 100 ns Note 1 All typical values except for temperature coefficient are at Ta=25 . Note 2 For conditions shown as MIN or MAX, use appropriate value under recommended operating conditions. Note 3 Duration of the short -circuit should not exceed one second. Note 4 Standard deviation is a measure of the statistical distribution the mean as derived from the formula: ns 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