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BD18326NUF-M ๋ฐ์ดํ„ฐ์‹œํŠธ(HTML) 18 Page - Rohm

๋ถ€ํ’ˆ๋ช… BD18326NUF-M
์ƒ์„ธ๋‚ด์šฉ  40 V 600 mA 1ch Constant Current Driver for Automotive LED Lamps
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BD18326NUF-M ๋ฐ์ดํ„ฐ์‹œํŠธ(HTML) 18 Page - Rohm

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ฉ 2020 ROHM Co., Ltd. All rights reserved.
BD18326NUF-M
28.Sep.2020 Rev.001
www.rohm.com
TSZ22111 ? 15 ? 001
TSZ02201-0T1T0B300340-1-2
Description of Blocks ? continued
(Unless otherwise specified, Tj = 25 ฐC, VIN = 13 V)
14. ISINK Pin Sink Current On Delay Time at Power On
Once UVLO is released and the CRT pin voltage is VCRT_DIS1 (2.0 V (Typ)) or more, the ISINK pin sink current is OFF
until the ISINK Pin Sink Current On Delay Time at Power On tISINKON_VINRISE (40 ?s (Typ)) elapses. At this time, the
ISINK Pin LED Open Monitor Current IOPISINK_MONI is sourced from the ISINK pin to monitor the status of the ISINK pin.
If the LED connected between the ISINK pin and GND is open, it is detected that the ISINK pin voltage VISINK is
exceeded the ISINK Pin LED Open Detection Voltage VOPISINKD (5.80 V (Typ)), and the ISINK pin sink current continues
to be OFF.
Set the external parts connected to the ISINK pin to satisfy the following formula.
???????????????????????????????????? <
????????????????????????????_???????????????? + ????????????????????????????????_????????????????????????????
???????????????? + ????????????????????????
[V]
????????????????????????????????????
is the ISINK pin LED open detection voltage,
5.80 V (Typ)
????????????????????????????????_????????????????
is the ISINK pin LED open monitor current,
1.3 mA (Typ)
????????????????????????????????_????????????????????????????
is the ISINK pin sink current on delay time at power on,
40 ?s (Typ)
????????????????
is the LED parasitic capacitance,
[nF]
????????????????????????
the capacitor connecting the ISINK pin,
[nF]
ISINK Pin Sink Current On Delay Time at Power On
VIN
ISINK
OUT
VIN
VOPISINKD
VIN
Delay Circuit
at Power On
VINUVLO Signal
LED ON Signal
CISINK
CLED
Control
Logic
SW
ISINK Pin
Current Sink Circuit
VIN
(=VCRT)
VINUVLO
Release
(VIN > VUVLOR)
VISINK
VIN
tISINKON_VINRISE
IISINK
IOPISINK
_MONI
VOPISINK D
VOPISINKR
VINUVLO
Detection
(VIN < VUVLOD)
OFF
OFF
1.3mA (Typ)
SW
OFF
ON
OFF
ISINK Current
Sink Circuit
OFF
OFF
OFF
Forced
OFF


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