GM7500

GM7500 PULSE-WIDTH-MODULATION CONTROL CIRCUITS Description 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. Features 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 CT Oscillator Pulse Steering Flip-Flop ≈ 0.1V Dead Time Control Comparator C1 E1 C2 E2 Dead Time Control Non Inverting Input Inverting Input Non Inverting Input Inverting Input Error Amplifier 1 PWM Comparator Reference Feedback Error Amplifier 2 VREF GND w ww.gammamicro.com.tw 1 GM7500 V1.00 VCC GM7500 PULSE-WIDTH-MODULATION CONTROL CIRCUITS Marking Information and Pin Configurations (Top View) SO16 and DIP16 1. Non-inverter Input 2. Inverter Input 3. Feedback 4. Dead Time Control 5. CT 6. RT 7. GND 8. C1 16. Non-inverter Input 15. Inverter Input 14. REF Out 13. Output Control 12. VCC 11. C2 10. E2 9. E1 A: Assembly / Test site code Y: Year WW: Week GM7500 AYWW Ordering Information Ordering Number GM7500S16T GM7500S16R GM7500D16T Package SO16 SO16 DIP16 Shipping 50 Units/Tube 2500 Units/Reel 25 Units/Tube GM7500 V1.00 2 GM7500 PULSE-WIDTH-MODULATION CONTROL CIRCUITS Absolute Maximum Ratings PARAMETER Supply Voltage Amplifier input voltage Collector output voltage Collector output current Operating Ambient Temperature Range Storage Temperature Lead Temperature (soldering 10 sec.) * Maximum Package Power Dissipation Limits must be observed. RATINGS 41 VCC + 0.3 41 250 - 40 to 125- 65 to 150 260 UNITS V A V mA °C °C °C Recommended Operating Conditions PARAMETER Supply Voltage Amplifier input voltage Collector output voltage Collector output current (each transistor) Current into feedback terminal Timing Capacitor Timing Resistor Oscillator frequency Operating free air temperature TA CT RT 0.0047 1.8 1 0 SYMBOL VCC Vi Vo RATINGS MIN 7 - 0.3 MAX 40 VCC - 2 40 200 0.3 10 500 200 70 UNITS V A V mA µF kΩ kHz °C 3 GM7500 V1.00 GM7500 PULSE-WIDTH-MODULATION CONTROL CIRCUITS P arameter Measurement Information VCC = 15V 150Ω 2W TEST INPUTS 12kΩ 0.01µF DEAD-TIME FEEDBACK RT CT (+) (-) (+) ERROR REF OUT (-) OUTPUT CONTROL C2 E2 C1 E1 100Ω 2W OUTPUT 1 OUTPUT 2 50kΩ TEST CIRCUIT VCC VOLTAGE AT C1 0 VCC VOLTAGE AT C2 0 VOLTAGE AT CT THRESHOLD VOLTAGE DEAD-TIME CONTROL INPUT THRESHOLD VOLTAGE FEEDBACK GM7500 V1.00 DUTY CYCLE 0% MAX VOLTAGE WAVEFORMS FIGURE 1. OPERATIONAL TEST CIRCUIT AND WAVEFORMS 4 GM7500 PULSE-WIDTH-MODULATION CONTROL CIRCUITS AMPLIFIER UNDER TEST FEEDBACK TERMINAL Vref OTHER AMPLIFIER FIGURE 2. AMPLIFIER CHARACTERISTICS 15V 68Ω 2W OUTPUT CL = 15pF (Includes probe and jig capacitance) tf 90% tr 90% (EACH OUTPUT CIRCUIT) 10% 10% OUTPUT VOLTAGE WAVEFORM FIGURE 3. COMMON-EMITTER CONFIGURATION 15V (EACH OUTPUT CIRCUIT) 90% 90% OUTPUT CL = 15pF (Includes probe and jig capacitance) 68Ω 2W 10% 10% tr tf FIGURE 42. EMITTER-FOLLOWER CONFIGURATION 5 GM7500 V1.00 OUTPUT VOLTAGE WAVEFORM GM7500 PULSE-WIDTH-MODULATION CONTROL CIRCUITS Electrical Characteristics (TA = 0°C to 70°C, VCC=15V, f = 10kHz, unless otherwise specified) Reference Section Parameter Output Voltage Line Regulation Load Regulation Short Circuit output Current Symbol Vref ∆Vref-V ∆Vref-I ISC IO = 1mA Test Conditions Min 4.9 4.95 Typ 5.0 5.0 2 1 Max 5.1 5.05 25 15 50 Unit V mV mV mA TA = 25°C, IO = 1mA 7V < VCC < 40V 1mA < IO < 10mA Vref =0 10 35 Oscillator Section (See Figure 1) Parameter Frequency Frequency Change with Temperature ***** Test Conditions * CT = 0.01µF, RT = 12 kΩ, TA = 25°C CT = 0.01µF, RT = 12 kΩ CT = 0.01µF, RT = 12 kΩ, ∆T = Min to Max Min 9.2 9.0 Typ 10 2 Max 10.8 12 Unit KHz KHz Amplifier Section (See Figure 2) Parameter Input Offset Voltage Input Offset Current Input Bias Current Common Mode Input Voltage Range Open-loop Voltage Amplification Unity-gain Bandwidth Symbol VOFFSET IOFFSET IBIAS CMRR Test Conditions * VO (pin 3) = 2.5V VO (pin 3) = 2.5V VO (pin 3) = 2.5V VCC = 7V to 40V ∆VO = 3V, RL = 2kΩ, VO = 0.5 to 3.5V Min Typ 2 25 0.2 Max 10 250 1 Unit mV nA µA V -0.3 to VCC - 2 70 95 650 dB KHz Output Section Parameter Collector off-state Current Emitter off-state Current Collectoremitter Saturation Voltage Common-Emitter Emitter -Follow Test Conditions * VCE = 40V, VCC = 40V VCC = VC = 40V, VE = 0V VE = 0, IC = 200mA VC = 15V, IE = -200mA VI = Vref Min Typ 2 Max 100 -100 Unit µA µA V mA 1.1 1.5 1.3 2.5 3.5 GM7500 V1.00 Output Control Input Current Dead-time Control Section (See Figure 1) Parameter Input Bias Current (pin 4) Maximum Duty Cycle, each output Input Threshold Voltage (pin 4) Test Conditions * VI = 0 to 5.25v VI (pin 4) = 0, O.C. = Vref Zero duty cycle Maximum duty cycle Min Typ -2 Max -10 Unit µA % 45 3 0 3.3 V 6 GM7500 PULSE-WIDTH-MODULATION CONTROL CIRCUITS Electrical Characteristics (TA = 0°C to 70°C, VCC=15V, f = 10kHz, unless otherwise specified) Parameter PWM Comparator Section (See Figure 1) Input Threshold Voltage (pin 3) Input Sink Current (pin 3) Zero Duty Cycle V(pin 3) = 0.7V 0.3 4 0.7 4.5 V mA Condition Min Typ Max Unit 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 Emitter-Follower Configuration, See Figure 4 100 25 100 25 200 100 200 100 ns * 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 V1.00 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) 0.228 - 0.244 (5.800 - 6.200) 0.050 (BSC) 1.270 (BSC) 0.053 - 0.061 (1.350 - 1.550) 0-8 O O SEATING PLAN 0.013 - 0.020 (0.330 - 0.510) 0.004 - 0.010 0.007 - 0.010 (0.100 - 0.250) (0.170 - 0.250) inches (mm) Package Outline Dimensions – DIP 16 16 9 0.244 - 0.260 (0.204 - 0.360) 1 8 0.740 - 0.758 (18.800 - 19.200) 0.060 (BSC) 1.524 (BSC) 0.146 - 0.170 (3.710 - 4.310) 0.244 - 0.260 (6.200 - 6.600) 0.118 - 0.142 (3.000 - 3.600) 0.015 - 0.022 (0.380 - 0.570) 0.331 - 0.354 (8.400 - 9.000) 0.008 - 0.014 (0.204 - 0.360) 0.100 (BSC) 2 .540 (BSC) GM7500 V1.00 inches (mm) 8 GM7500 PULSE-WIDTH-MODULATION CONTROL CIRCUITS O rdering Number G M 7500 APM Gamma Micro Circuit Type S16 Package Type S16: SO 16 D16: DIP 16 R Shipping Type R: Taping & Reel T: Tube 91 GM7500 V1.00