TPS92512HV datasheet(7/30 Pages) TI1

Part #	TPS92512HV

Description	2.5A Buck LED Driver with Integrated Analog Current Adjust

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Manufacturer	TI1 [Texas Instruments]

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IADJ Voltage (V)

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

0

0.25

0.5

0.75

1

1.25

1.5

D001

PDIM Duty Cycle (%)

0

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50

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70

80

90

100

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

D001

Resistor, RT (k:)

40

60

80

100

120

140

160

180

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2200

D001

Resistor, RT (k:)

200

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900 1000 1100 1200

100

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600

D001

Input Voltage (V)

15

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D001

Input Voltage (V)

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60

1.47

1.48

1.49

1.5

1.51

1.52

1.53

D001

TPS92512, TPS92512HV

www.ti.com

SLVSCT1B – FEBRUARY 2015 – REVISED APRIL 2015

7.7 Typical Characteristics

VIN = 24V, Unless otherwise specified

1.5 A LED Current

4 LEDs in Series

VIADJ = 1.8 V

1.5 A LED Current

3 LEDs in Series

VIADJ = 1.8 V

fSW = 570 kHz

VOUT = 13.1 V

VOUT = 9.9 V

Figure 1. Efficiency vs Input Voltage

Figure 2. Line Regulation

Figure 3. Switching Frequency vs RT Resistor

Figure 4. Switching Frequency vs RT Resistor

1.5 A LED Current

3 LEDs in Series

1.5 A LED Current

3 LEDs in Series

VIADJ = 1.8 V

VOUT = 9.9 V

250 Hz PWM Frequency

VOUT = 9.9 V

Figure 5. LED Current vs IADJ Voltage

Figure 6. LED Current vs PDIM Duty Cycle

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