0

900

1000

400

600

60

80

100

160

180

220

R

140

800

700

500

300

200

100

200

120

I

SHORT_min

I

SHORT_max

MIN

1.037

ILIMx

48000

IOS

2500mA

R

=

=

1

1

1.037

1.037

ILIMx

MIN

48000

48000

R

17.28k

IOS

2500mA

é

ù

é

ù

=

=

=

ê

ú

ê

ú

ë

û

ë

û

ILIMx

17.28k

R

17.11k

1.01

=

=

ILIMx

R

16.9k

=

TPS2540, TPS2540A

TPS2541, TPS2541A

www.ti.com

SLVSAG2C

– OCTOBER 2010 – REVISED OCTOBER 2011

Current Limit Threshold

vs

Current Limit Resistance

Figure 42.

Current Limit Setpoint Example

In the following example, choose the ILIM resistor to ensure that the TPS2540/40A/41/41A does not trip off under

2500 mA.

(6)

(7)

Including resistor tolerance, target maximum:

(8)

Choose:

(9)

Copyright

© 2010–2011, Texas Instruments Incorporated

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Product Folder Link(s): TPS2540, TPS2540A TPS2541, TPS2541A