Power input

Applicable receivers:   | BD1090 | BD1092 | BD1092i

The unit, excluding the antenna, operates at 3.3 V +5%/-3%. The 3.3 V should be able to supply 2.0 A constant current, at least 4.0 A surge current. The typical power consumption based on band usage is:

• L1/L2 GPS + GLONASS = 2.0 W

• L1/L2/L5 GPS + GLONASS + BeiDou + Galileo = 2.5 W

Worst case full-load power consumption including the antenna is 5.0 W. (Note: Worst case was tested with all features, including RF bands, LEDs, enabled, at +85 °C). There are multiple power rails in the system. Voltage rails 1.2 V, 1 V, 1.8 V, 2.35 V, 5.7 V, or 7.6 V (antenna outputs) are provided by switching supplies. 3.1 V, 3.0 V, and 1.95 V use LDOs to achieve low-noise voltage rails.

Power protection

The 3.3 V input has limited input protection. The module incorporates a window comparator (TPS3700) to prevent under and over-voltage events into critical circuitry. 3.0-3.6 V will pass through the window-comparator. Over-voltage events higher than 5 V can damage the system.