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Rohm Semiconductor Electronic Components Datasheet

BD1754HFN Datasheet

Constant Current LED Driver

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Datasheet
Constant Current LED Driver
with 64 Dimming Steps for up to 4 LEDs
BD1754HFN
General Description
BD1754HFN is a multi-level brightness control LED
Driver that works as a constant current driver with 64
steps, so that the driving current can be adjusted finely.
BD1754HFN is best suited to turn ON LEDs that require
high-accuracy LED brightness control.
Features
Current Regulation for up to 4 Parallel LEDs
Adjustable Constant Current with 64 Steps
High Accuracy and Good Matching of each Current
Channel (0.5% Typ)
Brightness Control Via Single-Line Digital Control
Interface (Uni-Port Interface Control = UPIC)
Key Specification
Operating Power Supply Voltage Range:
2.7V to 5.5V
Quiescent Current:
0.1μA (Typ)
Operating Temperature Range: -30°C to +85 °C
Package
W(Typ) x D(Typ) x H(Max)
Applications
This driver can be used in various applications such as
mobile phones, portable game consoles and etc.
HSON8
2.90mm x 3.00mm x 0.60mm
Typical Application Circuit
Power Supply
IN
CIN 0.1µF
EN
L1 L2 L3 L4
BD1754HFN
GND
ISET
RISET 120kΩ
(When ILED-max =32mA)
Product structureSilicon monolithic integrated circuit
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product has no designed protection against radioactive rays
1/17
TSZ02201-0G3G0C200060-1-2
10.Dec.2015 Rev.002


Rohm Semiconductor Electronic Components Datasheet

BD1754HFN Datasheet

Constant Current LED Driver

No Preview Available !

BD1754HFN
Datasheet
Absolute Maximum Ratings (Ta = 25°C)
Parameter
Symbol
Rating
Unit
Maximum Applied Voltage
VMAX
7V
Power Dissipation
Pd
0.63 (Note 1)
W
Operating Temperature Range
Topr
-30 to +85
°C
Storage Temperature Range
Tstg
-55 to +150
°C
(Note 1) When mounted on a glass epoxy board (70 mm x 70 mm x 1.6 mm). Derate by 5.04 mW/°C for Ta higher than 25 °C.
Caution: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit
between pins. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated over the absolute maximum
ratings.
Recommended Operating Conditions (Ta = -30°C to +85°C)
Parameter
Symbol
Rating
Min Typ
Operating Power Supply Voltage
VIN
2.7 3.6
Driver Pin Voltage Range
VDRV 0.2 -
Max
5.5
VIN-1.4
Unit Conditions
V
V When Current driver power ON.
Electrical Characteristics (Unless otherwise specified, Ta = 25°C and VIN = 3.6V)
Parameter
Limit
Symbol
Unit
Min Typ
Max
Conditions
Quiescent Current
IQ - 0.1 1 μA VEN=0V
Circuit Current
IDD - 1.2 2.0 mA Except LED current
[Current Driver]
Maximum Current
LED Current Accuracy
LED Current Matching
[Logic Controller]
ILED-MAX 29.76 32.0 34.24
mA RISET = 120kΩ
ILED-diff
ILED-match
-
-
-
7.0
%
When current 16.5 mA setting
RISET = 120kΩ
0.5 3.0(Note 1)
%
When current 16.5 mA setting
RISET = 120kΩ
Low Threshold Voltage
VIL - - 0.4 V
High Threshold Voltage
‘H’ Level Input Current
‘L’ Level Input Current
EN ‘H’ Time
EN ‘L’ Time
VIH 1.4 - - V
IIH
-0
2 μA VEN=VIN
IIL
-2 0
- μA VEN=0V
tHI 0.05 - 100 μsec
tLO
0.3 -
100 μsec
EN OFF Time-Out
tOFF 1 - - msec
IN Supply -> EN Active Time
tVINON 1 -
- msec
EN Stand-by -> VBAT OFF Time
tVINOFF
(Note 1) The following formula is used for calculation:
ILED-match = {(IMAX - IMIN) / (IMAX + IMIN)} x 100
IMAX = The maximum current value from all channels
IMIN = The minimum current value from all channels
0
-
- msec
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
2/17
TSZ02201-0G3G0C200060-1-2
10.Dec.2015 Rev.002


Part Number BD1754HFN
Description Constant Current LED Driver
Maker ROHM
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