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

Figure 2

Dimming Efficiency with 38 LEDs

Figure 3

Dimming Linearity

Figure 4

Dimming Linearity at Small Dimming Duty

Figure 5

Cycle

DC Load Efficiency

Figure 6

Switching Frequency Setting

Figure 7

Boost Switching Waveform

Figure 8

Dimming Waveform (2% Dimming)

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.

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