Texas Instruments TPS2661EVM, Руководство пользователя, Страница: 16 / 32

Figure 5-11. Current-Limit Behavior of TPS26612 Under Sustained Overload
5.7 Current Limiting for V
IN
< –V
s
Use the following instructions to evaluate current limit behavior for input voltages lower than negative bias supply
(–V
s
):
1. Replace the TPS26610 with TPS26613 in U1 position
2. The current limiting behavior is independent of MODE setting for V
IN
< –V
s
, so jumper setting J4 can be in
any position
3. Open jumper J6
4. Connect 600 Ω at terminal J3
5. Set dual polarity regulated power supply to +20 V : 0 V : –20 V and apply the power at connector J2
6. Apply a voltage of –24 V at I_IN_1
7. The device limits the current to 32 mA for approximately 100 ms and then auto retries for every 800 ms
Figure 5-12 shows current limit behavior captured on the TPS2661EVM with TPS26613 in U1 position.
Test Setup and Procedures www.ti.com
16 TPS2661EVM: Evaluation Module for TPS2661x
Current-Loop Protector SLVUBX8B – OCTOBER 2020 – REVISED DECEMBER 2021
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