Complete PWM Power Control Circuitry Uncommitted Outputs for 00-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 With 5% Tolerance Circuit Architecture Allows Easy Synchronization ERROR IN+ AMP IN DEAD-TIME CTRL C T R T GND C J PACKAGE (TOP VIEW) 3 5 7 8 5 3 0 9 FK PACKAGE (TOP VIEW) IN+ IN ERROR AMP OUTPUT CTRL V CC C E E description The TL9M incorporates on a single monolithic chip all functions required in the construction of a pulse-width-modulation controlled system. Designed primarily for power supply control, these devices offer the systems engineer the flexibility to tailor the power supply control circuitry to a specific application. The TL9M contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control comparator, a pulse-steering control flip-flop, a 5-V 5%-precision regulator, and output-control circuits. The error amplifiers exhibit a common-mode voltage range from 0.3 V to V CC V. The dead-time control comparator has a fixed offset that provides approximately 5% dead time when externally altered. The on-chip oscillator can be bypassed by terminating R T to the reference output and providing a sawtooth input to C T, or it can be used to drive the common circuits in synchronous multiple-rail power supplies. DEAD-TIME CTRL NC C T R T NC No internal connection INPUT OUTPUT CTRL VI = GND VI = IN IN+ NC IN+ IN 3 0 9 8 5 7 7 5 8 9 0 3 GND C NC E E OUTPUT CTRL NC V CC C 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 can 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. The TL9M is characterized for operation from 55 C to 5 C. ERROR AMP ERROR AMP FUNCTION TABLE OUTPUT FUNCTION Single-ended or parallel output Normal push-pull operation PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright 993, Texas Instruments Incorporated On products compliant to MIL-STD-883, Class B, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters. POST OFFICE BOX 55303 DALLAS, TEXAS 755
functional block diagram RT CT DEAD-TIME CTRL 5 0. V Oscillator Dead-Time-Control Comparator D OUTPUT CTRL (see Function Table) 3 C Q 8 9 C E IN + IN Error Amplifier + PWM Comparator Pulse-Steering Flip-Flop Q 0 C E IN + IN 5 Error Amplifier + Reference Regulator VCC 3 0.7 ma 7 GND Pin numbers shown are for J package. POST OFFICE BOX 55303 DALLAS, TEXAS 755
absolute maximum ratings over operating free-air temperature range (unless otherwise noted) NOTES: Supply voltage, V CC (see Note )........................................................... V Amplifier input voltage, V I............................................................ V CC + 0.3 V Collector output voltage.................................................................... V Collector output current.................................................................. 50 ma Continuous total dissipation (see Note )................................................. 375 mw Operating free-air temperature range.............................................. 55 C to 5 C Storage temperature range....................................................... 5 C to 50 C Case temperature for 0 seconds: FK package.............................................. 0 C Lead temperature, mm (/ inch) from case for 0 seconds: J package..................... 300 C. All voltage values, except differential voltages, are with respect to the network GND.. For operation above 5 C free-air temperature, derate linearly to 75 mw at the rate of mw/ C. recommended operating conditions MIN MAX UNIT Supply voltage, VCC 7 0 V Amplifier input voltage, VI 0.3 VCC V Collector output voltage, VO 0 V Collector output current (each transistor) 00 ma Current into 0.3 ma Timing capacitor, CT 0.7 0000 nf Timing resistor, RT.8 500 kω Oscillator frequency, fosc 300 khz Operating free-air temperature, TA 55 5 C POST OFFICE BOX 55303 DALLAS, TEXAS 755 3
electrical characteristics over recommended operating free-air temperature range, V CC = 5 V, f = 0 khz (unless otherwise noted) reference section Output voltage, IO = ma.75 5 5.5 V Input regulation VCC = 7 V to 0 V 5 mv Output regulation IO = ma to 0 ma 5 mv Output voltage change with temperature TA = MIN to MAX 0.% 3%* Short-circuit output current = 0 5 ma oscillator section, C T = 0.0 µf, R T = kω (see Figure ) Frequency 0 khz Standard deviation of frequency All values of VCC, CT, RT, and TA constant 0% Frequency change with voltage VCC = 7 V to 0 V, TA = 5 C 0.% Frequency change with temperature# TA = MIN to MAX %* error amplifier section (see Figure ) Input offset voltage VO () =.5 V 0 mv Input offset current VO () =.5 V 5 50 na Input bias current VO () =.5 V 0. µa Common-mode input voltage range VCC = 7 V to 0 V 0.3 to VCC Open-loop voltage amplification VO = 3 V, RL = kω, VO = 0.5 V to 3.5 V 70 95 db Unity-gain bandwidth VO = 0.5 V to 3.5 V, RL = kω 800 khz Common-mode rejection ratio VO = 0 V, TA = 5 C 5 80 db Output sink current, VID = 5 mv to 5 V, V () = 0.7 V 0.3 0.7 ma Output source current, VID = 5 mv to 5 V, V () = 3.5 V ma * This parameter is not production tested. All typical values except for parameter changes with temperature are at TA = 5 C. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. N Duration of the short circuit should not exceed one second. (x n X) Standard deviation is a measure of the statistical distribution about the mean as derived from the formula: # n Temperature coefficient of the timing capacitor and timing resistor is not taken into account. N V POST OFFICE BOX 55303 DALLAS, TEXAS 755
electrical characteristics over recommended operating free-air temperature range, V CC = 5 V, f = 0 khz (unless otherwise noted) output section Collector off-state current VCE = 0 V, VCC = 0 V 00 µa Emitter off-state current VCC = VC = 0 V, VE = 0 00 µa Collector-emitter saturation voltage Common emitter VE = 0, IC = 00 ma..3 Emitter follower VC = 5 V, IE = 00 ma.5.5 Output control input current VI = 3.5 ma dead-time control section (see Figure ) Input bias current, DEAD-TIME CTRL VI = 0 to 5.5 V 0 µa Maximum duty cycle, each output VI (DEAD-TIME CTRL) = 0, CT = 0. µf, RT = kω 5% 50%* Input threshold voltage, DEAD-TIME CTRL pwm comparator section (see Figure ) Zero duty cycle 3 3.3 Maximum duty cycle 0* Input threshold voltage, Zero duty cycle.5 V Input sink current, V () = 0.7 V 0.3 0.7 ma total device (see Figure ) Standby supply current RT at, VCC = 5 V All other inputs and outputs open VCC = 0 V 9 Average supply current VI (DEAD-TIME CTRL) = V, See Figure 7.5 ma switching characteristics, T A = 5 C Output voltage rise time, tr Output voltage fall time, tf Common-emitter configuration, See Figure 3 Output voltage rise time, tr Output voltage fall time, tf Emitter-follower configuration, See Figure * This parameter is not production tested. All typical values except for temperature coefficient are at TA = 5 C. 00 00* 5 00* 00 00* 0 00* V V ma ns ns POST OFFICE BOX 55303 DALLAS, TEXAS 755 5
PARAMETER MEASUREMENT INFORMATION VCC = 5 V Test Inputs 3 kω 5 0.0 µf 5 VCC DEAD-TIME CTRL RT CT IN + IN IN + IN Error Amplifiers 50 Ω, W 50 Ω, W C 8 Output E 9 C Output E 0 50 kω 3 OUTPUT CTRL GND 7 TEST CIRCUIT Voltage at C Voltage at C VCC 0 V VCC 0 V Voltage at CT DEAD-TIME CONTROL Threshold Voltage 0 V Threshold Voltage 0.7 V Duty Cycle 0% MAX 0% VOLTAGE WAVEFORMS Figure. Operational Test Circuit and Waveforms POST OFFICE BOX 55303 DALLAS, TEXAS 755
PARAMETER MEASUREMENT INFORMATION Amplifier Under Test + VI + Other Amplifier Figure. Amplifier Characteristics 5 V Each Output Circuit 8 Ω, W Output 90% tf tr 90% CL = 5 pf (includes probe and jig capacitance) 0% 0% TEST CIRCUIT OUTPUT VOLTAGE WAVEFORM Figure 3. Common-Emitter Configuration 5 V Each Output Circuit 90% 90% Output 0% 0% CL = 5 pf (includes probe and jig capacitance) 8 Ω, W tr OUTPUT VOLTAGE WAVEFORM tf TEST CIRCUIT Figure. Emitter-Follower Configuration POST OFFICE BOX 55303 DALLAS, TEXAS 755 7
TYPICAL CHARACTERISTICS Oscillator Frequency Hz 00 k 0 k 0 k k k 00 00 0 OSCILLATOR FREQUENCY AND FREQUENCY VARIATION vs TIMING RESISTANCE % % CT = µf 0% 0. µf 0.0 µf VCC = 5 V TA = 5 C 0.00 µf f = % 0 k k 0 k 0 k 00 k 00 k M RT Timing Resistance Ω Frequency variation ( f) is the change in oscillator frequency that occurs over the full temperature range. Figure 5 00 90 80 AMPLIFIER VOLTAGE AMPLIFICATION vs FREQUENCY VCC = 5 V VO = 3 V TA = 5 C Voltage Amplification db 70 0 50 0 30 0 0 0 0 00 k 0 k 00 k M f Frequency Hz Figure Printed 8 in U.S.A. POST OFFICE BOX 55303 DALLAS, TEXAS 755 SGLS0A
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