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参数资料
| 型号： | TPS2561DRC |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| 封装： | GREEN, SON-10 |
| 文件页数： | 9/24页 |
| 文件大小： | 942K |
| 代理商： | TPS2561DRC |
OUT1
OUT2
IN
GND
FAULT1
ILIM
EN2
2x RFAULT
100 k
Control Signal
2.5V – 6.5V
VOUT1
TPS2560/61
0.1 F
FaultSignal
Power Pad
VOUT2
EN1
Control Signal
FAULT2
Fault Signal
2x CLOAD
R2
22.1 k
Current Limit
Control Signal
Q1
R1
187 k
www.ti.com
SLVS930 – DECEMBER 2009
TWO-LEVEL CURRENT-LIMIT CIRCUIT
Some applications require different current-limit thresholds depending on external system conditions. Figure 21
shows an implementation for an externally controlled, two-level current-limit circuit. The current-limit threshold is
set by the total resistance from ILIM to GND (see previously discussed Programming the Current-Limit Threshold
section). A logic-level input enables/disables MOSFET Q1 and changes the current-limit threshold by modifying
the total resistance from ILIM to GND. Additional MOSFET/resistor combinations can be used in parallel to
Q1/R2 to increase the number of additional current-limit levels.
NOTE
ILIM should never be driven directly with an external signal.
Figure 21. Two-Level Current-Limit Circuit
Copyright 2009, Texas Instruments Incorporated
17
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