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DLPC900 датащит (PDF) 28 Page - Texas Instruments

№ деталь DLPC900
подробность  DLPC900 Digital Controller for Advanced Light Control
скачать  83 Pages
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
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DLPC900 Datasheet(HTML) 28 Page - Texas Instruments

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PWRGOOD
tt1
POSENSE
80%
50%
20%
DC Power Supplies
tt1
tw1(L)
tt2
80%
50%
20%
80%
50%
20%
80%
50%
20%
28
DLPC900
DLPS037D – OCTOBER 2014 – REVISED MARCH 2019
www.ti.com
Product Folder Links: DLPC900
Submit Documentation Feedback
Copyright © 2014–2019, Texas Instruments Incorporated
(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)
4
µs
tw1(L)
Pulse duration with 1.8 V on, inactive
low, PWRGOOD
50% to 50% reference points (signal)
1000
ms
Pulse duration with 1.8 V off, inactive
low, PWRGOOD
indefinite
ms
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
ms
Pulse duration with 1.8 V off, inactive
low, POSENSE
indefinite
ms
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.
20
ms
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
ms
The sum of PWRGOOD and POSENSE inactive time with 1.8 V off
indefinite
ms
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


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