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PDF BD60A00NUX Data sheet ( Hoja de datos )
| Número de pieza | BD60A00NUX | |
| Descripción | White LED Driver | |
| Fabricantes | ROHM Semiconductor | |
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Datasheet
White LED Driver
With PWM Brightness Control
for up to 11 LEDs in Series
BD60A00NUX
BD60A60NUX
●General Description
This IC is boost DC/DC converter that can drive white
LED with constant current. More stabled white LED
lighting can be achieved by direct current connection
without electric tolerance and High-speed response by
current mode. Moreover, separating IC power supply
(2.7V to 5.5V) and coil power supply (2.3V to 20V)
makes it possible to widen input range, which will be
helpful to be applied to various kinds of applications.
Over voltage setting can be selected corresponding to
the number of LED lightings. BD60A00NUX is for max
11 lightings, BD60A60NUX is for max 6 lightings.
●Features
Boost DC/DC converter
Drive LED 11 lightings
(VOUT=3.6V×11+0.7V=40.3V <VF MAX=3.7V>)
BD60A00NUX
Brightness control by outside PWM signal (PWM
frequency =100Hz to 30kHz, 25kHz 1% dimming
application)
Brightness control by DC input
Soft start function (1ms Typ.)
Over voltage protection
BD60A00NUX:
42V (Typ.)
BD60A60NUX:
28V (Typ.)
SBD open protection and output short protection
Over current protection
LED terminal over voltage protection
UVLO
●Key Specifications
Operating power supply voltage range: 2.7V to 5.5V
LED maximum current:
30mA (Max.)
Switching Frequency:
600kHz(Typ.)
Quiescent Current:
0.1μA (Typ.)
Operating temperature range:
-40˚C to +85˚C
●Package W(Typ.) x D(Typ.) x H(Max.)
VSON008X2030
2.00mm x 3.00mm x 0.60mm
●Applications
Digital video cameras, digital single-lens reflexes,
digital still cameras, digital photo frames, personal
navigations (PND), mobile phones, smart phones, MID,
PDA, hand-held computers, MP3 players, GPS, digital
media players, etc.
●Typical Application Circuit
Coil Power
2.3V to 20V
Ccoil
4.7μF
L1
10μH
SW
IC Power
2.7V to 5.5V
CIN
1μF
VIN
COUT
D1 2.2μF
VOUT
BD60AxxNUX
11 LEDs
FB
ISET
GND
EN PWM
Enable control PWM control
○Product structure：Silicon monolithic integrated circuit
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product is not designed protection against radioactive rays
1/22
TSZ02201-0G3G0C200320-1-2
7.FEB.2013 Rev.002
1 page  
BD60A00NUX
BD60A60NUX
●Main characteristics examples- continued
IC Power=5.0V, Coil Power=4V to 16V
・BD60A00NUX
IC Power=5.0V, Coil Power=2.7V to 20V, LED 8serial, LED current =25mA,
coil 1094AS-10M (TOKO), SBD RB060M-60TR (ROHM)
Datasheet
95
90 eff1
eff2
85
80
eff 1 = (VOUT x ILED) / (Vcoil x Icoil) x100
75 eff 2 = (VOUT x ILED) / (Vcoil x Icoil + VIN x IVIN) x100
70
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Vcoil (V)
・BD60A60NUX
IC Power=5.0V, Coil Power=2.7V to 20V, LED 6serial, LED current =25mA,
coil 1094AS-10M (TOKO), SBD RB521A-40TR (ROHM)
95
90
85
80
75
eff = (VOUT x ILED) / (Vcoil x Icoil + VIN x IVIN) x100
70
2 3 4 5 6 7 8 9 10 11 12 13 14
Vcoil (V)
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/22
TSZ02201-0G3G0C200320-1-2
7.FEB.2013 Rev.002
5 Page 
BD60A00NUX
BD60A60NUX
Datasheet
●Operating of the application deficiency - continued
3) When Schottky diode (SBD) remove
In the situation that connection is opened and also DC/DC is activated, SW terminal voltage becomes more than rated
voltage due to a lack of parts that can accept the current accumulated inside the coil. Consequently IC might be
destroyed. To prevent the IC destruction, SBD open protection is functioned. SW terminal is never destroyed as
boosting operation is stopped after VOUT terminal detects less than 0.2V.
4) When resistance linked to an ISET terminal short-circuits
Since Resistor connected to ISET terminal becomes 0Ω, LED current setting value becomes more than rating. In order
to avoid this trouble, this IC has LED current limit protection. By using this function, setting current of rating current
driver becomes 0mA, and the current flow of LED is almost same as leak current.
●Control signal input timing
2.2V
①
VIN
EN
PWM
DC/DC VOUT
②
Min. 100µs
VIN
EN
PWM
DC/DC VOUT
③
Min. 10ms
Figure 6. Control signal input timing
When input control signals such as Enable and PWM without completing the standup of supply voltage (VIN), be
careful of the following points.
① Input each control signal after VIN exceeds 2.2V and UVLO is off.
② When input Enable and PWM, the standup time should be placed as Min.100µs from 2.2V to stable voltage for
VIN.
③ Since a soft start function stops working at the time of following PWM=H when EN=H is held with PWM=L.
After EN=H should input a PWM signal within 10ms.
●Start control (EN) and select LED current driver (PWM)
This IC can control the IC system by EN terminal and also turns off compulsorily by setting “L” level input voltage 0.4V
or below. It also powers on when EN becomes more than “H” level input voltage 1.3V. In the case of EN=H, LED
current fixed by ISET resistor with PWM=H flows. When it is selected at PWM=L, LED current stop to flow.
EN
PWM
IC
LED current
L L Off Off
H L On Off
L H Off Off
H H On Current fixed by ISET
●LED current setting range
LED current sets up normal current by resister (RISET) connected to ISET voltage.
Each setting current is shown as below.
Normal current = 600/RISET [A]
Normal current setting range is 10mA to 30mA, and also LED current at off setting is MAX 2µA of leak current.
ISET Normal current setting example
RISET
20.0kΩ (E96)
24.0kΩ (E24)
30.0kΩ (E24)
56.0kΩ (E24)
LED current
30.0mA
25.0mA
20.0mA
10.7mA
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/22
TSZ02201-0G3G0C200320-1-2
7.FEB.2013 Rev.002
11 Page | ||
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| PDF Descargar | [ Datasheet BD60A00NUX.PDF ] | |
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