TPS92640PWPT datasheet(9/37 Pages) TI1

No. de pieza	TPS92640PWPT

Descripción Electrónicos	Synchronous Buck Controllers for Precision Dimming LED Drivers

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Fabricante Electrónico	TI1 [Texas Instruments]

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VIN = 48V

VLED § 32V (10 LEDs)

ILED = 1A

fSW § 500kHz

ILED : 500mA/DIV

VSW : 20V/DIV

Time : 1Ps/DIV

VIN = 48V

VLED § 32V (10 LEDs)

ILED = 1A

fSW § 500kHz

fUDIM = 200Hz

ILED : 500mA/DIV

VSW : 20V/DIV

VUDIM : 5V/DIV

Time : 1ms/DIV

VIN : 50V/DIV

VSW : 20V/DIV

ILED : 500mA/DIV

VIN = 48V

VLED § 32V (10 LEDs)

ILED = 1A

fSW § 500kHz

Time : 4ms/DIV

0

100

200

300

400

500

600

700

0

10

20

30

40

50

60

70

80

90

Input Voltgae, V

IN(V)

C009

1 LED

8 LEDs

15 LEDs

f

SW §

N+] 1RP

I

LED = 1A (Nom.)

L = 68µH, 94mQ

0.900

0.950

1.000

1.050

1.100

0

10

20

30

40

50

60

70

80

90

Input Voltage, V

IN(V)

C007

1 LED

8 LEDs

15 LEDs

f

SW §

N+] 1RP

I

LED = 1A (Nom.)

L = 68µ, 94mQ

50.0

60.0

70.0

80.0

90.0

100.0

0

10

20

30

40

50

60

70

80

90

Input Voltage, V

IN(V)

C008

1 LED

8 LEDs

15 LEDs

f

SW §

N+] 1RP

I

LED = 1A (Nom.)

L = 68µH, 94mQ

Q

HS, QLS : SUD15N15-95

TPS92640, TPS92641

www.ti.com

SNVS902A – OCTOBER 2012 – REVISED OCTOBER 2015

Typical Characteristics (continued)

Unless otherwise stated, –40°C

≤ TA = TJ ≤ 125°C, VIN = 24 V, VIADJ= 2 V, ILED = 1 A, CVCC = 2.2 μF, CCOMP = 0.47 μF

Figure 7. LED Current, ILED vs Input Voltage, VIN

Figure 8. Conversion Efficiency,

η vs Input Voltage, VIN

Figure 9. Converter Switching Frequency, fSW vs Input

Figure 10. Waveforms of Power-Up Transient

Voltage, VIN

Figure 11. Waveforms of Steady-State Operation

Figure 12. Waveforms of UDIM Operation (DDIM = 0.5)

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Product Folder Links: TPS92640 TPS92641

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