9 Power Supply Recommendations

The DLPR410 uses two power supply rails as shown in Table 9-1.

Table 9-1. DLPR410 Power Supply Rails

SUPPLY

POWER PINS

COMMENTS

1.8 V

0.047-μF decoupling capacitor to GND.

2.5 V

µF and a 0.047-μF decoupling capacitor to GND.

10 Layout

10.1 Layout Guidelines

The DLPR410 is part of a multi-chipset solution. It is required to be used with the DLPC410ZYR Controller to

provide reliable control of any attached DMDs. These guidelines are targeted at designing a PCB board with the

DLPR410.

10.1.1 Component Placement

The DLPR410 must be placed adjacent to the DLPC410ZYR Controller with a maximum electrical distance of 4

inches (10 cm).

10.1.2 Impedance Requirements

Signals between the DLPR410 and the DLPC410ZYR Controller must be routed to have a matched impedance

of 50 Ω ±10%.

10.1.3 PCB Signal Routing

When designing a PCB board which includes the DLPR410 and the DLPC410ZYR Controller, the following are

recommended:

Signal trace corners must be no sharper than 45°. Adjacent signal layers must have the predominate traces

routed orthogonal to each other.

TI does not recommend signal routing on power or ground planes.

TI does not recommend ground plane slots.

High speed signal traces must not cross over slots in adjacent power and/or ground planes.

10.1.4 Fiducials

Fiducials for automatic component insertion must be 0.05-inch copper with a 0.1-inch cutout (antipad). Fiducials

for optical auto insertion are placed on three corners of both sides of the PCB.

10.1.5 PCB Decoupling Guidelines

Decoupling capacitors must be utilized to provide instantaneous current sources to components and to help

mitigate ground bounce.

10.1.5.1 Bulk Decoupling

Bulk decoupling capacitors for the board must be distributed around the PCB and be sized to handle the current

demands for the board.

10.1.5.1.1 DLPR410 Decoupling Capacitors

Decoupling capacitors (0.1 µF recommended) are placed to minimize the distance from the decoupling capacitor

to the supply and ground pins of the component. It is recommended that the placement of and routing for the

decoupling capacitors meet the following guidelines:

• The supply voltage pin of the capacitor must be located close to the device supply voltage pin(s). The

decoupling capacitor must have vias to ground and voltage planes. The device can be connected directly to

www.ti.com

DLPR410

DLPS027G – AUGUST 2012 – REVISED AUGUST 2021

Copyright © 2021 Texas Instruments Incorporated

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