TPS92640PWPR datasheet(7/37 Pages) TI1

Part #	TPS92640PWPR

Description	Synchronous Buck Controllers for Precision Dimming LED Drivers

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Manufacturer	TI1 [Texas Instruments]

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TPS92640, TPS92641

www.ti.com

SNVS902A – OCTOBER 2012 – REVISED OCTOBER 2015

Electrical Characteristics (continued)

Unless otherwise specified VIN = 24 V. Typical specifications apply for TA = TJ = 25°C.

PARAMETER

TEST CONDITIONS

MIN(1)

TYP(2)

MAX(1)

UNIT

PWM DIMMING (SDIM, SDRV) (TPS92641 only)

RSRC-DDRV

SDRV Sourcing Resistance

SDRV = High

5.6

30

Ω

tSDIM-RIS

SDIM to SDRV Rising Delay

SDIM rising

68

100

ns

tSDIM -FALL

SDIM to SDRV Falling Delay

SDIM falling

29

70

ns

VSDIM-RIS

SDIM Rising Threshold

SDIM rising

1.29

1.74

V

VSDIM -FALL

SDIM Falling Threshold

SDIM falling

0.5

V

RSDIM-PU

SDIM Pullup Resistance

90

k

Ω

ANALOG ADJUST (IADJ)

VADJ-MAX

IADJ Clamp Voltage

2.46

2.54

2.62

V

RADJ

IADJ Input Impedance

1

M

Ω

UNDERVOLTAGE / PWM (UDIM)

VTH-UDIM

UDIM Start-up Threshold

UDIM rising

1.21

1.276

1.342

V

IHYS-UDIM

UDIM Hysteresis Current

12

21

30

µA

tUDIM-RIS

UDIM to HG/LG Rising Delay

UDIM rising

168

260

ns

tUDIM-FALL

UDIM to HG/LG Falling Delay

UDIM falling

174

280

ns

VUDIM-LP

UDIM Low Power Threshold

370

mV

TUDIM-DET

UDIM Shutdown Detect Timer

UDIM falling

8.5

13

ms

THERMAL SHUTDOWN

TSD

Thermal Shutdown Threshold

See (3)

165

°C

THYS

Thermal Shutdown Hysteresis

See (3)

20

°C

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Product Folder Links: TPS92640 TPS92641

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