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BA00DD0WFPTR Fiches technique(PDF) 9 Page - Rohm

No de pièce BA00DD0WFPTR
Description  2A/1A Variable Output
Download  20 Pages
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Fabricant  ROHM [Rohm]
Site Internet  http://www.rohm.com
Logo ROHM - Rohm

BA00DD0WFPTR Fiches technique(HTML) 9 Page - Rohm

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Datasheet
Datasheet
BD60A00NUX
BD60A60NUX
© 2012 ROHM Co., Ltd. All rights reserved.
www.rohm.com
TSZ22111・15・001
TSZ02201-0G3G0C200320-1-2
27.SEP.2012 Rev.001
●Protection - continued
LED terminal over voltage protection
When FB terminal becomes higher than 5.9V (Typ.), IC senses the situation trouble after 100µs and then stops constant
current driver and DC/DC. Therefore IC becomes never heated, even if output and FB are both shorted. Moreover, if FB
terminal becomes lower than 5.9V (Typ.), IC senses normal condition and activates constant current driver.
Prevention of LED terminal over voltage protection malfunction
As the below diagrams show, voltage drop of FB terminal becomes slow when PWM operates by connecting capacitor on
a parallel with LED and decreasing LED current. At that time, LED terminal voltage protection works after condition of FB
terminal > 5.9V keeps more than 100µs. LED terminal voltage protection might stop current driver and DC/DC and also
turns off LEDs, so that please set up coil selection and LED current setting less than 100µs until FB terminal < 5.9V.
Low voltage detect protection (UVLO)
Supply voltage(VIN) becomes lower than low voltage detect voltage 2.2V(Typ.), IC stops DC/DC and constant current
driver. Moreover, this function can be off by boosting supply voltage up to more than hysteresis voltage.
DC/DC
Current Driver
VIN
reset
2.20 V
5%
0V
Active
Active
2.32 V
FB
VOUT
Current Driver
FB
reset
5.9 V
Active
DC/DC
Active
100µs
reset
reset
reset
PWM
L
H
EN
L
H
Current Driver
FB
reset
5.9V
0.7V
Active
DC/DC
Active
100µs
reset
reset
reset
PWM
L
H


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