Texas Instruments LP87745-Q1, Руководство пользователя

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Figure 6-4. Layout of Top Layer, Layer 1................................................................................................................................... 18
Figure 6-5. Layout of Ground layer 1, Layer 2........................................................................................................................... 18
Figure 6-6. Layout of Signal Layer 1, Layer 3............................................................................................................................ 18
Figure 6-7. Layout of Signal Layer 2, Layer 4............................................................................................................................ 18
Figure 6-8. Layout of Ground Layer 2, Layer 5.......................................................................................................................... 18
Figure 6-9. Layout of Bottom Layer, Layer 6............................................................................................................................. 18
List of Tables
Table 2-1. Input and Output Voltages, and Load Current Requirements..................................................................................... 3
Table 3-1. Terminal Blocks........................................................................................................................................................... 4
Table 3-2. Configuration Jumpers................................................................................................................................................ 4
Table 3-3. Test Points on the EVM............................................................................................................................................... 6
Table 4-1. Jumper Connections for Powering the EVM............................................................................................................... 8
Table 6-1. Components list........................................................................................................................................................ 18
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1 Top View with Basic External Connections
Figure 1-1 shows the top-view diagram of the EVM along with basic connections. By default, EVM is configured
to power up through VBAT supply through onboard 12 V VIN to 3.3 V VOUT pre-regulator. EVM can also be
powered through external 3.3 V supply or through USB port. Please refer to
Table 3-2 for the right jumper
configuration for each power-supply input.
Default Jumpers
USB
VBAT
(5V-20V)
BUCK3 VOUT BOOST VOUT
VIN 3.3V
(3V-4V)
BUCK2 VOUT BUCK1 VOUT
VIO_LDO
OUT
LP877451Q1EVM
Figure 1-1. EVM Top-View Diagram With Basic Connections and Default Jumpers
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2 LP877451Q1EVM Evaluation Module SNVU769A – SEPTEMBER 2021 – REVISED OCTOBER 2022
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