功能 #2520
已关闭功能 #2519: Ford_SYSR: System Requirement
Ford_SYSR: FS_REQ0001_V2 LDM Input
描述
The LDM will use Channel2 as main power input as HS REQ005, and rest channels input to be used as an input signal to activate LB/TI/DRL, but the LDM shall be also capable of switching to the failsafe power supply when the main power supply is not available as below Failsafe modes.
Each of these inputs are unregulated battery inputs, the LDM shall be filly operational over following voltage range:
| A | B |
|---|---|
| Requirement | Voltage level at source |
| V1: Low voltage of guaranteed function: | 7V and 6V for 150ms max (for start/ stop cycle only) |
| V2: High voltage of guaranteed function: | 18V |
| V3: Low voltage of guaranteed performance: | 9V |
| V4: High voltage of guaranteed performance: | 16V |
| V5: Nominal operating voltage: | 12.8 +/- 0.2V |
Table 4: LDM input voltage range
Derating functions for battery voltages below 9V shall be used to reduce input current. This requirement refer to steady state input voltage (constant voltage applied for > 500ms 250ms（requirement from DV test）, they do not apply to input transients applied, such as EMC pulses and stop/start). Channels may derate functional output current by 30% of nominal operating current when the module input is below 9V.
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