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TPS61197DR Datasheet(PDF) 7 Page - Texas Instruments |
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TPS61197DR Datasheet(HTML) 7 Page - Texas Instruments |
7 / 22 page 0 50 100 150 200 250 300 350 0 10 20 30 40 50 60 70 80 90 100 PWM Dimming Duty Cycle (%) 100Hz Dimming 1kHz Dimming 0 1 2 3 4 5 6 7 8 9 10 0 0.5 1 1.5 2 2.5 3 PWM Dimming Duty Cycle (%) 1kHz Dimming 100Hz Dimming 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 PWM Dimming Duty Cycle (%) VIN = 12V VIN = 24V 24 LEDS (VOUT = 80V) 100Hz Dimming Frequency 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 PWM Dimming Duty Cycle (%) VIN = 48V VIN = 24V 38 LEDs (VOUT = 130V) 100Hz Dimming Frequency TPS61197 www.ti.com SLVSC25 – JULY 2013 TYPICAL CHARACTERISTICS TABLE OF GRAPHS Figure 1 as test circuit TITLE TEST CONDITIONS FIGURE Dimming Efficiency with 24 LEDs 24 LEDs (VOUT = 80V), IOUT = 300mA, 100Hz Dimming Frequency Figure 2 Dimming Efficiency with 38 LEDs 38 LEDs (VOUT = 130V), IOUT = 300mA, 100Hz Dimming Frequency Figure 3 Dimming Linearity 24 LEDs (VOUT = 80V), VIN = 24V Figure 4 Dimming Linearity at Small Dimming Duty 24 LEDs (VOUT = 80V), VIN = 24V Figure 5 Cycle DC Load Efficiency fSW = 130kHz Figure 6 Switching Frequency Setting VIN = 24V Figure 7 Boost Switching Waveform VIN = 24V, VOUT = 80V, IOUT = 300mA Figure 8 Dimming Waveform (2% Dimming) VIN = 24V, VOUT = 80V, IOUT = 300mA, 100Hz Dimming Frequency Figure 9 Startup Waveform (1% Dimming) 100Hz Dimming Frequency, 1% Dimming Duty Cycle Figure 10 Startup Waveform (100% Dimming) 100Hz Dimming Frequency, 100% Dimming Duty Cycle Figure 11 Shutdown Waveform (1% Dimming) 100Hz Dimming Frequency, 1% Dimming Dutyc Cycle Figure 12 Shutdown Waveform (100% Dimming) 100Hz Dimming Frequency, 100% Dimming Duty Cycle Figure 13 LED Open Protection (1% Dimming) 100Hz Dimming Frequency, 1% Dimming Duty Cycle Figure 14 LED Open Protection (100% Dimming) 100Hz Dimming Frequency, 100% Dimming Duty Cycle Figure 15 LED String Short Protection (1% Dimming) 100Hz Dimming Frequency, 1% Dimming Duty Cycle Figure 16 LED String Short Protection (100% Dimming) 100Hz Dimming Frequency, 100% Dimming Duty Cycle Figure 17 EFFICIENCY (24 LEDs) EFFICIENCY (38 LEDs) Figure 2. Figure 3. DIMMING LINEARITY DIMMING LINEARITY AT LOW DIMMING DUTY CYCLE Figure 4. Figure 5. Copyright © 2013, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: TPS61197 |
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