DLPC900 datasheet(28/83 Pages) TI1

28 / 83 page

PWRGOOD

tt1

POSENSE

80%

50%

20%

DC Power Supplies

tt1

tw1(L)

tt2

80%

50%

20%

80%

50%

20%

80%

50%

20%

DLPC900

DLPS037D – OCTOBER 2014 – REVISED MARCH 2019

www.ti.com

Product Folder Links: DLPC900

Submit Documentation Feedback

(1)

As long as noise on this signal is below the hysteresis threshold.

6.7 Power-Up and Power-Down Timing Requirements

All DMDs supported by the DLPC900 controller require Firmware Version 4.0.0 or later.

Table 2. Power-Up and Power-Down Timing Requirements

MIN

MAX

UNIT

tw1(L)

Pulse duration, inactive low, PWRGOOD 50% to 50% reference points (signal)

µs

tw1(L)

Pulse duration with 1.8 V on, inactive

low, PWRGOOD

50% to 50% reference points (signal)

1000

Pulse duration with 1.8 V off, inactive

low, PWRGOOD

indefinite

tt1

Transition time, PWRGOOD, tt1 = tƒ /tr

20% to 80% reference points (signal)

625

µs

tw2(L)

Pulse duration, inactive low, POSENSE

50% to 50% reference points (signal)

500

µs

tw2(L)

Pulse duration with 1.8 V on, inactive

low, POSENSE

50% to 50% reference points (signal)

1000

Pulse duration with 1.8 V off, inactive

low, POSENSE

indefinite

tt2

Transition time, POSENSE, tt2 = tƒ /tr

20% to 80% reference points (signal)

25 (1)

µs

tPH

Power hold time, POSENSE remains

active after PWGOOD is deasserted.

20% to 80% reference points (signal)

500

µs

tePH

Extended power hold time for revision "B" and later DMDs.

tEW

Early warning time, PWRGOOD goes inactive low before any power supply voltage

goes below its specification

500

µs

tw1(L) + tw2(L)

The sum of PWRGOOD and POSENSE inactive time with 1.8 V on

1050

The sum of PWRGOOD and POSENSE inactive time with 1.8 V off

indefinite

6.7.1

Power-Up

POSENSE and PWRGOOD are active high signals, that are generated by an external voltage monitor circuit.

POSENSE should be driven active high when all the controller and DMD supply voltages have reached 90% of

their specified minimum voltage. The DLPC900 is safe to exit its RESET state once PWRGOOD is driven high.

PWRGOOD has no impact on operation for 60 ms after rising edge of POSENSE.

Figure 2. Power Up Timing Diagram

DLPC900 Datasheet(PDF) 28 Page - Texas Instruments

DLPC900 Datasheet(HTML) 28 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83

Datasheet Download

Link URL