GM7500 PULSE-WIDTH-MODULATION CONTROL CIRCUITS Description Features The KA7500 incorporate on a single monolithic chip all the functions required in the construction of a pulse-width-modulation control circuit. Designed primarily for power supply control, these devices offer the systems engineer the flexibility to tailor the power supply control circuitry to his application. The KA7500 contains an error amplifier, an onchip adjustable oscillator, a dead-time control comparator, pulse-steering control flipflop, a 5volt, 1% precision regulator, and output-control circuits. The error amplifier exhibits a commonmode voltage range from -0.3 volts to VCC -2 volts. The dead-time control comparator has a fixed offset that provides approximately 5% dead time when externally altered. The on-chip oscillator may be bypassed by terminating RT (pin 6) to the reference output and providing a sawtooth input to CT (pin 5), or it may be used to drive the common circuits in synchronous multiple-rail power supplies. The uncommitted output transistors provide either common-emitter or emitter-follower output capability. Each device provides for push-pull or single-ended output operation, which may be selected through the output-control function. The architecture of these devices prohibits the possibility of either output being pulsed twice during push-pull operation. High Current totem Pole Output Stage 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 Pulse at Either Output Variable Dead-Time Provides Control over Total Range Internal Regulator Provides a Stable 5-V Reference Supply, 1% Circuit Architecture Allows Easy synchronization Functional Block Diagram Output Control RT Oscillator Dead Time Control Non Inverting Input Pulse Steering Flip-Flop ≈ 0.1V C1 Dead Time Control Comparator E1 C2 Error Amplifier 1 E2 PWM Comparator VCC Inverting Input Non Inverting Input Inverting Input Reference VREF Feedback Error Amplifier 2 GND GM7500 V1.00 CT www.gammamicro.com.tw 1 GM7500 PULSE-WIDTH-MODULATION CONTROL CIRCUITS Marking Information and Pin Configurations (Top View) SO16 and DIP16 1. Non-inverter Input 16. Non-inverter Input 2. Inverter Input 15. Inverter Input 3. Feedback 5. CT 6. RT 7. GND 14. REF Out GM7500 AYWW 4. Dead Time Control 8. C1 13. Output Control 12. VCC 11. C2 10. E2 9. E1 A: Assembly / Test site code Y: Year WW: Week Ordering Information GM7500 V1.00 Ordering Number 2 Package Shipping GM7500S16T SO16 50 Units/Tube GM7500S16R SO16 2500 Units/Reel GM7500D16T DIP16 25 Units/Tube GM7500 PULSE-WIDTH-MODULATION CONTROL CIRCUITS Absolute Maximum Ratings PARAMETER RATINGS UNITS 41 V VCC + 0.3 A Collector output voltage 41 V Collector output current 250 mA Operating Ambient Temperature Range - 40 to 125- °C Storage Temperature - 65 to 150 °C 260 °C Supply Voltage Amplifier input voltage Lead Temperature (soldering 10 sec.) * Maximum Package Power Dissipation Limits must be observed. Recommended Operating Conditions SYMBOL RATINGS UNITS MIN MAX VCC 7 40 V Amplifier input voltage Vi - 0.3 VCC - 2 A Collector output voltage Vo 40 V Supply Voltage Collector output current (each transistor) 200 Current into feedback terminal 0.3 mA Timing Capacitor CT 0.0047 10 µF Timing Resistor RT 1.8 500 kΩ 1 200 kHz 0 70 °C Oscillator frequency Operating free air temperature TA GM7500 V1.00 PARAMETER 3 GM7500 PULSE-WIDTH-MODULATION CONTROL CIRCUITS Parameter Measurement Information VCC = 15V 150Ω 2W TEST INPUTS 12kΩ 0.01µF DEAD-TIME C1 FEEDBACK E1 OUTPUT 1 RT C2 CT (+) (-) (+) 50kΩ 100Ω 2W OUTPUT 2 E2 ERROR (-) OUTPUT CONTROL REF OUT TEST CIRCUIT VCC VOLTAGE AT C1 0 VCC VOLTAGE AT C2 0 VOLTAGE AT CT THRESHOLD VOLTAGE DEAD-TIME CONTROL INPUT THRESHOLD VOLTAGE GM7500 V1.00 FEEDBACK 4 DUTY CYCLE 0% MAX VOLTAGE WAVEFORMS FIGURE 1. OPERATIONAL TEST CIRCUIT AND WAVEFORMS GM7500 PULSE-WIDTH-MODULATION CONTROL CIRCUITS AMPLIFIER UNDER TEST FEEDBACK TERMINAL OTHER AMPLIFIER Vref FIGURE 2. AMPLIFIER CHARACTERISTICS 15V (EACH OUTPUT CIRCUIT) 68Ω 2W tf tr 90% 90% OUTPUT CL = 15pF (Includes probe and jig capacitance) 10% 10% OUTPUT VOLTAGE WAVEFORM FIGURE 3. COMMON-EMITTER CONFIGURATION 15V 90% OUTPUT CL = 15pF (Includes probe and jig capacitance) 68Ω 2W 90% 10% 10% tr tf OUTPUT VOLTAGE WAVEFORM FIGURE 42. EMITTER-FOLLOWER CONFIGURATION GM7500 V1.00 (EACH OUTPUT CIRCUIT) 5 GM7500 PULSE-WIDTH-MODULATION CONTROL CIRCUITS Electrical Characteristics (TA = 0°C to 70°C, VCC=15V, f = 10kHz, unless otherwise specified) Reference Section Parameter Symbol Test Conditions Min Typ Max IO = 1mA 4.9 5.0 5.1 TA = 25°C, IO = 1mA 4.95 5.0 5.05 Unit V Output Voltage Vref Line Regulation ∆Vref-V 7V < VCC < 40V 2 25 mV Load Regulation ∆Vref-I 1mA < IO < 10mA 1 15 mV 10 35 50 mA Min Typ Max Unit CT = 0.01µF, RT = 12 kΩ, TA = 25°C 9.2 10 10.8 CT = 0.01µF, RT = 12 kΩ 9.0 - 12 Short Circuit output Current ISC Vref =0 Oscillator Section (See Figure 1) Parameter Test Conditions * Frequency Frequency Change with Temperature ***** CT = 0.01µF, RT = 12 kΩ, ∆T = Min to Max 2 KHz KHz Amplifier Section (See Figure 2) Parameter Symbol Input Offset Voltage VOFFSET Input Offset Current Input Bias Current Common Mode Input Voltage Range Open-loop Voltage Amplification Test Conditions * Typ Max Unit VO (pin 3) = 2.5V 2 10 mV IOFFSET VO (pin 3) = 2.5V 25 250 nA IBIAS VO (pin 3) = 2.5V 0.2 1 µA CMRR VCC = 7V to 40V ∆VO = 3V, RL = 2kΩ, VO = 0.5 to 3.5V Min -0.3 to VCC - 2 70 Unity-gain Bandwidth V 95 dB 650 KHz Output Section GM7500 V1.00 Parameter 6 Test Conditions * Min Typ Max Unit 2 100 µA -100 µA Collector off-state Current VCE = 40V, VCC = 40V Emitter off-state Current VCC = VC = 40V, VE = 0V Collectoremitter Saturation Voltage Common-Emitter VE = 0, IC = 200mA 1.1 1.3 Emitter -Follow VC = 15V, IE = -200mA 1.5 2.5 Output Control Input Current VI = Vref V 3.5 mA Typ Max Unit -2 -10 µA Dead-time Control Section (See Figure 1) Parameter Test Conditions * Input Bias Current (pin 4) VI = 0 to 5.25v Maximum Duty Cycle, each output VI (pin 4) = 0, O.C. = Vref Input Threshold Voltage (pin 4) Min 45 Zero duty cycle Maximum duty cycle % 3 0 3.3 V GM7500 PULSE-WIDTH-MODULATION CONTROL CIRCUITS Electrical Characteristics (TA = 0°C to 70°C, VCC=15V, f = 10kHz, unless otherwise specified) Parameter Condition Min Typ Max Unit 4 4.5 V PWM Comparator Section (See Figure 1) Input Threshold Voltage (pin 3) Zero Duty Cycle Input Sink Current (pin 3) V(pin 3) = 0.7V 0.3 0.7 mA Switching Characteristics, TA = 25°C Section (See Figure 1) Output Voltage Rise Time Output Voltage Fall Time Output Voltage Rise Time Output Voltage Fall Time Common-Emitter Configuration, See Figure 3 100 200 25 100 Emitter-Follower Configuration, See Figure 4 100 200 25 100 ns GM7500 V1.00 * For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. ** All typical values except for parameter changes with temperature are at TA = 25 °C *** Duration of the short-circuit should not exceed one second **** This is guaranteed where the marking code on the package surface is “A” ***** Temperature coefficient of timing capacitor and timing resistor not taken into account 7 GM7500 PULSE-WIDTH-MODULATION CONTROL CIRCUITS Package Outline Dimensions – SO 16 0.386 - 0.402 (9.800 - 10.200) 0.150 - 0.157 (3.800 - 4.000) 0.016 - 0.050 (0.400 - 1.270) 0.050 (BSC) 1.270 (BSC) 0.228 - 0.244 (5.800 - 6.200) 0.053 - 0.061 (1.350 - 1.550) SEATING PLAN O 0.013 - 0.020 (0.330 - 0.510) 0.004 - 0.010 0.007 - 0.010 (0.100 - 0.250) (0.170 - 0.250) O 0-8 inches (mm) Package Outline Dimensions – DIP 16 9 16 0.244 - 0.260 (0.204 - 0.360) 1 8 0.740 - 0.758 (18.800 - 19.200) 0.060 (BSC) 1.524 (BSC) 0.244 - 0.260 (6.200 - 6.600) 0.146 - 0.170 (3.710 - 4.310) 0.008 - 0.014 (0.204 - 0.360) 0.118 - 0.142 (3.000 - 3.600) GM7500 V1.00 0.100 (BSC) 2.540 (BSC) 8 0.015 - 0.022 (0.380 - 0.570) 0.331 - 0.354 (8.400 - 9.000) inches (mm) GM7500 PULSE-WIDTH-MODULATION CONTROL CIRCUITS GM 7500 APM Gamma Micro Circuit Type S16 R Package Type Shipping Type S16: SO 16 D16: DIP 16 R: Taping & Reel T: Tube GM7500 V1.00 Ordering Number 91