BD2041AFJ,BD2051AFJ,BD6519FJ

Technical Note

7/18

www.rohm.com

2011.05 - Rev.B

© 2011 ROHM Co., Ltd. All rights reserved.

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Waveform data (BD2041AFJ/BD2051AFJ)

Regarding the output rise/fall and over current detection characteristics of BD2051AFJ, refer to the characteristic of BD2041AFJ.

TIME(1ms/div.)

Fig.26 Output rise characteristic

(BD2041AFJ)

(5V/div.)

(5V/div.)

(5V/div.)

(5V/div.)

(5V/div.)

(0.5A/div.)

(5V/div.)

(5V/div.)

(0.5A/div.)

(5V/div.)

(0.5A/div.)

TIME(1ms/div.)

Fig.27 Output fall characteristic

(BD2041AFJ)

TIME(2ms/div.)

Fig.30 Over current response

Ramped load

(BD2041AFJ)

TIME (2ms/div.)

Fig.31 Over current response

Enable to shortcircuit

(BD2041AFJ)

(5V/div.)

(5V/div.)

(0.5A/div.)

TIME (500ms/div.)

Fig.33 Over current response

Output shortcircuit at Enable

(BD2041AFJ)

(5V/div.)

(5V/div.)

(5V/div.)

(0.5A/div.)

Thermal Shutdown

(1V/div.)

(0.2A/div.)

(1V/div.)

TIME(0.5ms/div.)

Fig.28 Inush current

(BD2041AFJ)

47μF

147μF

220μF

330μF

TIME(20ms/div.)

Fig.29 Over current response

Ramped load

(BD2041AFJ)

(5V/div.)

(5V/div.)

(0.5A/div.)

(5V/div.)

(5V/div.)

(1A/div.)

TIME (2ms/div.)

Fig.32 Over current response

Output shortcircuit at Enable

(BD2041AFJ)

TIME (10ms/div.)

Fig.34 UVLO

(BD2041AFJ)

TIME (10ms/div.)

Fig.35 UVLO

(BD2041AFJ)

(5V/div.)

(5V/div.)

(0.5A/div.)

(5V/div.)

(5V/div.)

(5V/div.)

(0.5A/div.)

(5V/div.)