BD60A00NUX_12 [ROHM]
White LED Driver; 白光LED驱动器
| 型号： | BD60A00NUX_12 |
| 厂家： | 
ROHM |
| 描述： | White LED Driver |
| 文件： | 总25页 (文件大小：885K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Datasheet
White LED Driver
With PWM Brightness Control
for up to 11 LEDs in Series
BD60A00NUX
BD60A60NUX
●General Description
●Key Specifications
Operating power supply voltage range: 2.7V to 5.5V
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.
LED maximum current:
Switching Frequency:
Quiescent Current:
30mA (Max.)
600kHz(Typ.)
0.1μA (Typ.)
Operating temperature range:
-40˚C to +85˚C
●Package W(Typ.) x D(Typ.) x H(Max.)
●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)
VSON008X2030
2.00mm x 3.00mm x 0.60mm
Brightness control by DC input
Soft start function (1ms Typ.)
Over voltage protection
BD60A00NUX:
BD60A60NUX:
SBD open protection and output short protection
Over current protection
●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.
42V (Typ.)
28V (Typ.)
LED terminal over voltage protection
UVLO
●Typical Application Circuit
L1
11 LEDs
10μH
Coil Power
2.3V to 20V
COUT
D1
2.2μF
Ccoil
4.7μF
SW
VOUT
IC Power
2.7V to 5.5V
VIN
CIN
1μF
FB
BD60AxxNUX
ISET
PWM
PWM control
GND
EN
Enable control
○Product structure：Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
TSZ02201-0G3G0C200320-1-2
27.SEP.2012 Rev.001
1/22
Daattaasshheeeett
BD60A00NUX
BD60A60NUX
●Absolute Maximum Ratings
Parameter
Symbol
VMAX1
Ratings
7
Unit
V
Condition
Maximum applied voltage 1
VIN, EN, PWM, ISET terminals
FB, SW, VOUT terminals
BD60A00NUX
FB, SW, VOUT terminals
BD60A60NUX
Maximum applied voltage 2
Maximum applied voltage 3
VMAX2
VMAX3
45
31
V
V
Operating temperature range
Storage temperature range
Power dissipation 1
Topr
Tstg
Pd1
-40 to +85
-55 to +150
2000
˚C
˚C
*1
mW
*1 4 layer (ROHM Standard board) has been mounted. When it’s used by more than Ta=25˚C, it’s reduced by 20mW/˚C.
●Recommended Operating Ratings (Ta=-40˚C to +85˚C)
Parameter
Symbol
VIN
Ratings
Unit
V
Conditions
VIN terminal
Operating power supply voltage
Operating coil voltage
2.7 to 5.5 *
2.3 to 20
Vcoil
V
Coil voltage
*When the operating supply voltage is over 4.61V for BD60A00NUX, please refer the application P.16
●Electrical Characteristics (Unless otherwise specified, Ta=25˚C, VIN=3.6V)
Limits
Parameter
Symbol
Unit
Conditions
Min.
-
Typ.
0.1
Max.
1.0
Quiescent Current
Iq
μA
mA
mA
EN=0V
Current Consumption
(No Boost)
IddNB
IddB
-
-
1.5
2.5
3.0
EN=2.8V, PWM=0V
EN=2.8V, PWM=2.8V
Current Consumption (Boost)
[EN, PWM Terminal]
Low Input Voltage range
High Input Voltage range
Pull down register
5.0.
VthL
VthH
Rcnt
-
-
-
0.5
-
V
V
1.4
65
100
135
kΩ
[Switching Regulator]
FB Terminal Control Voltage
Switching Frequency
Max Duty
FB
0.56
0.70
600
95
0.84
V
kHz
%
fSW
-
90
-
-
-
Duty
Ronn
IqSW
FB=0V
SW Transistor ON Resistor
SW Transistor Leak Current
[Protection]
0.5
0.1
-
Ω
Isw=80mA
EN=0V
-
2.0
μA
Over Current Limit
Icoil
-
750
42
-
mA
V
*1
Over Voltage Limit
BD60A00NUX
OVP1
40
44
Detect voltage of VOUT terminal
Over Voltage Limit
BD60A60NUX
OVP2
26
28
30
V
Detect Voltage of VOUT terminal
Over Voltage Limit Hysteresis
VOUT Terminal Leak Current
Shot key Diode Open Protection
OVPhy
IqVOUT
Sop
-
-
-
1
-
1.0
-
V
μA
V
0.1
0.2
EN=0V
Detect Voltage of VOUT terminal
LED Terminal
Over Voltage Protection
LEDOVP
UVLO
4.4
-
5.9
2.2
6.4
-
V
V
PWM=2.8V
Detect Voltage of Low Voltage
[Current Driver]
VIN falling edge
LED Maximum Current
LED Current Accuracy
ILMAX
-
-
-
-
30
mA
%
VIN=4V, COUT=1µF
ILED=20mA
ILACCU
±3.0
Current Limit Value at
ISET Resistor 1kΩ Setting
LED Current Limit
ILOCP
-
0
0.1
mA
LED Leak Current
IqLED
Iset
-
-
0.1
0.6
2.0
-
μA
EN=0V
ISET Terminal Voltage
V
*1 This parameter is tested with DC measurement.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0G3G0C200320-1-2
27.SEP.2012 Rev.001
2/22
Daattaasshheeeett
BD60A00NUX
BD60A60NUX
●Pin Description
PIN No.
PIN Name
In/Out
In
Function
Enable Control
Terminal Diagram
1
2
3
4
5
6
7
8
EN
VIN
B
C
B
A
B
B
C
B
In
Battery Input
PWM
ISET
FB
In
PWM Input
In
LED Current Setting Terminal
Feedback Voltage Input
Over Voltage Protection Input
GND
In
VOUT
GND
SW
In
-
Out
Switching Terminal
●Pin ESD Type
VIN
VIN
PIN
PIN
GND
GND
GND
A
B
C
Figure 1. Pin ESD Type
●Block Diagram
VOUT
SW
+
-
Thermal
Shutdown
VIN
TSD
Over & under Voltage Protect
ERRAMP
UVLO
PWMcomp
FB
-
S
R
-
Control
+
+
Q1
Q
Current
Driver
ISET
Current
Sense
OSC
+
Over Current
protect
PWM
EN
GND
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0G3G0C200320-1-2
27.SEP.2012 Rev.001
3/22
Daattaasshheeeett
BD60A00NUX
BD60A60NUX
●Main characteristics examples
LED 6series, coil: VLF302512MT-100M
Condition:
VIN=3.6V
LED=6series
ILED Sweep (10->30mA)
CIN=1μF/10V
Ccoil=1μF/25V
COUT=2.2μF/50V
SBD=RB160M-60
Coil=VLF302512MT-100M
LED 10series, coil: VLF302512MT-100M
Condition:
VIN=3.6V
LED=10series
ILED Sweep (10->30mA)
CIN=1μF/10V
Ccoil=1μF/25V
COUT=2.2μF/50V
SBD=RB160M-60
Coil=VLF302512MT-100M
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0G3G0C200320-1-2
27.SEP.2012 Rev.001
4/22
Daattaasshheeeett
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)
95
90
85
eff1
eff2
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
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0G3G0C200320-1-2
27.SEP.2012 Rev.001
5/22
Daattaasshheeeett
BD60A00NUX
BD60A60NUX
●Main characteristics examples- continued
100mV/div
VOUT
LED current
PWM
40µs/div
PWM 20kHz Duty 50%
100mV/div
VOUT
LED current
PWM
200ns/div
PWM 20kHz Duty 1%
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0G3G0C200320-1-2
27.SEP.2012 Rev.001
6/22
Daattaasshheeeett
BD60A00NUX
BD60A60NUX
●Main characteristics examples - continued
・BD60A00NUX PWM duty – LED current
IC Power=5.0V, LED 8serial, LED current =25mA, PWM frequency = 20 kHz, Ta=25deg
coil 1094AS-10M (TOKO), SBD RB060M-60TR (ROHM)
100.00
10.00
1.00
0.10
0.01
0.1
1.0
10.0
100.0
PWM duty (%)
0.4%
Possible to Duty 0.4% at PWM=20 kHz
●Functional Descriptions
1) PWM current mode DC/DC converter
This IC keeps output voltage invariably by setting PWM duty to make FB terminal 0.7V when the power is on. As for the
inputs of the PWM comparator as the feature of the PWM current mode, one is overlapped with error components from
the error amplifier, and the other is overlapped with a current sense signal that controls the inductor current into Slope
waveform to prevent sub harmonic oscillation. This output controls internal Nch Tr via the RS latch. In the period where
internal Nch Tr gate is ON, energy is accumulated in the external inductor, and in the period where internal Nch Tr gate
is OFF, energy is transferred to the output capacitor via external SBD.
This IC has many safety functions, and their detection signals stop switching operation at once.
2) Soft Start
This IC has soft start function, which prevents rush current at turning on.
After EN and PWM are changed L H, soft start becomes effective within 1ms. Soft start doesn't become effective
even if Enable is changed L H, after that. By changing EN and PWM L H, soft start can become effective.
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.
EN
EN
Soft start time Finish
Within 10ms
PWM
PWM
Soft Start OFF
ON
OFF
ON
OFF
OFF
ON
Soft Start
Reset
OFF
OFF
Reset
Reset
Figure 2. Soft start
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0G3G0C200320-1-2
27.SEP.2012 Rev.001
7/22
Daattaasshheeeett
BD60A00NUX
BD60A60NUX
●Protection
・Over voltage protection
At such an error of output open as the output DC/DC and the LED is not connected to IC, the DC/DC boosts too much
and the VOUT terminal exceeds the absolute maximum ratings, and may destruct the IC. Therefore, when the VOUT
becomes sensing voltage or higher, the over voltage limit protection works, turns off the switching Tr, DC/DC will be
stopped, and the output voltage goes down slowly. When output voltage becomes below the hysteresis voltage of Over
voltage protection, A boost function works and output voltage reaches detection voltage again.
This operation is repeated unless the abnormalities in application are recovered.
・Schottky Diode open protection
In the case of external SBD is not connected to IC, or VOUT is shorted to GND, the coil or internal Tr may be destructed.
Therefore, at such an error as VOUT becoming 0.2V or below, turns off the output Tr, and prevents the coil and the IC
from being destructed.
And the IC changes from activation into non-activation, and current does not flow to the coil (0mA).
・Thermal shut down
This IC has thermal shut down function.
The thermal shut down works at 175˚C or higher, and the IC changes from activation into non-activation.
・Over Current Protection
Over current flows the current detection resistor that is connected to between internal switching transistor source and
GND. Current sense voltage turns more than detection voltage, over current protection is operating and it is prevented
from flowing more than detection current by reducing ON duty of switching Tr without stopping boost.
As over current detector of This IC is detected peak current, current more than over current setting value does not flow.
SW
+
-
< The estimate of the current value which need for the normal operation>
As over current detector of This IC is detected the peak current, it has to estimate peak current to flow to the coil by
operating condition.
In case of, ○ Switching frequency = fsw
○ Supply voltage of coil = VIN
○ Output voltage = VOUT
Typ.=0.6MHz
○ Inductance value of coil = L
○ Total LED current = IOUT
○ Peak current of coil = Ipeak
○ Average current of coil = Iave
○ Efficiency = eff
○ ON time of switching transistor = Ton
Ipeak = (VIN / L) × (1 / fsw) × (1-(VIN / VOUT))
Iave=(VOUT × IOUT / VIN) / eff
Ton=(Iave × (1-VIN/VOUT) × (1/fsw) × (L/VIN) × 2)1/2
As peak current varies according to whether there is the direct current superposed, the next is decided.
(1-VIN/VOUT) × (1/fsw) < Ton
(1-VIN/VOUT) × (1/fsw) > Ton
peak current = Ipeak /2 + Iave (continuous mode CCM)
peak current = (VIN / L)×Ton (discontinuous mode DCM)
(Example 1)
In case of, VIN=6.0V, L=10µH, fsw=0.6MHz, VOUT=32.5V, IOUT=25mA, current =85%
Ipeak = (6.0V / 10µH) × (1 / 0.6MHz) × (1-(6.0V / 32.5V)) =0.82 A
Iave = (32.5V × 25mA / 6.0V) / 85% = 0.16A
Ton = (0.16A × (1-6.0V / 32.5V) × (1 / 0.75MHz) × (10µH /6.0V) × 2)1/2 = 0.85µs
(1-VIN/VOUT) × (1/fsw)=1.36µs > Ton
peak current = (6.0V / 10µH)×0.85µs =0.51A
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0G3G0C200320-1-2
27.SEP.2012 Rev.001
8/22
Daattaasshheeeett
BD60A00NUX
BD60A60NUX
●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.
5.9V
FB
0.7V
Current Driver reset
Active
Active
reset
reset
DC/DC
PWM
reset
L
100µs
H
・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.
FB
5.9 V
100µs
VOUT
Current Driver
DC/DC
reset
reset
reset
reset
Active
Active
FB
PWM
EN
H
H
L
L
・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.
VIN
5%
2.32 V
2.20 V
0V
DC/DC
Current Driver
Active
reset
Active
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0G3G0C200320-1-2
27.SEP.2012 Rev.001
9/22
Daattaasshheeeett
BD60A00NUX
BD60A60NUX
●Operating of the application deficiency
1) When 1 LED or 1string OPEN during the operating
Since FB terminal is set to 0V when set to OPEN, Output boosts up to the over voltage protection voltage. When over
voltage is detected, the boosting operation stops and then output voltage goes down slowly. Later, if output voltage
becomes less than hysteresis of over current protection, output voltage keeps boosting up to over voltage protection
voltage again.
Vout
Hysteresis voltage
FB voltage
FB
LED
normal
20mA
Open
0mA
connection
LED current
Figure 3. LED open detect
2) When LED short-circuited in the plural
Even if one LED short-circuits during boost operation, it usually passes along LED and it is turned on. By making LED
shorted, FB terminal voltage increases by LED VF. Therefore output voltage becomes lower by LED VF, and the
condition turns to be normal.
VOUT
output
VF of LED
LED short
0.7V+VF of LED
VF of LED
FB
0.7V
FB
LED current
20mA
Figure 4. One LED shorted
VOUT
VOUT
FB
LED short
VIN
5.9V
FB
0.7V
20mA
LED current
0.1mA
100µs
Figure 5. FB terminal – VOUT terminal shorted
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0G3G0C200320-1-2
27.SEP.2012 Rev.001
10/22
Daattaasshheeeett
BD60A00NUX
BD60A60NUX
●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
VIN
②
Min. 100µs
③
EN
EN
Min. 10ms
PWM
PWM
DC/DC VOUT
DC/DC VOUT
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 1.4V. 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
L
PWM
IC
LED current
L
L
Off
On
Off
On
Off
Off
Off
H
L
H
H
H
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
LED current
30.0mA
20.0kꢀ (E96)
24.0kꢀ (E24)
30.0kꢀ (E24)
56.0kꢀ (E24)
25.0mA
20.0mA
10.7mA
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0G3G0C200320-1-2
27.SEP.2012 Rev.001
11/22
Daattaasshheeeett
BD60A00NUX
BD60A60NUX
●Brightness control
There are two dimming method available; the first method is analog dimming that applies analog voltage to ISET terminal,
and the second method is digital dimming that inputs PWM to PWM terminal. Since each method has the different merits,
please choose a suitable method for the application of use.
1) Current driver PWM control is controlled by providing PWM signal to PWM, as it is shown Figure 7.
The current set up with ISET is chosen as the H section of PWM and the current is off as the L section. Therefore, the
average LED current increases in proportion to duty cycle of PWM signal. This method that internal circuit and DC/DC
work, because it becomes to switch the driver, the current tolerance is a few when the PWM brightness is adjusted, so it
makes it possible to brightness control until 0.4µs (MIN1% at 25kHz). And, don't use for the brightness control, because
effect of ISET changeover is big under 0.4µs ON time and under 3µs OFF time. Typical PWM frequency is 100Hz to
25kHz.
L1
10μH
VIN
30
25
20
15
10
5
2.7V to 4.6V
COUT
CIN
4.7μF
2.2μF
VIN
PWM
EN
SW
VOUT
PWM Input
25mA
RESET
FB
GND
ISET
R1
24kꢀ
0
0
20
40
60
80
100
PWM
ON
OFF
PWM Hi duty [%]
LED current
ON
ON
OFF
OFF
ON
Coil current
IC’s active current
Figure 7. PWM sequence
2) Analog dimming can be operated by applying voltage to ISET terminal via resistor as the below figure shows. ISET
terminal voltage works to become 0.6V regardless of the connected resistor. LED current increases ISET terminal current
600 times, so that LED current can be minimized by decreasing flow current into ISET terminal using external DC input
L1
10μH
VIN
2.7V to 4.6V
COUT
30
25
20
15
10
5
CIN
4.7μF
2.2μF
Vin
PWM
EN
SW
VOUT
LED ON/OFF
RESET
FB
GND
R2 22kꢀ
DC
ISET
R1
470kꢀ
1000 x 0.6V
1000
22kꢀ
LED current =
+
0.6V - DAC output
0
470kꢀ
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7
DC Voltage [V]
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0G3G0C200320-1-2
27.SEP.2012 Rev.001
12/22
Daattaasshheeeett
BD60A00NUX
BD60A60NUX
●Brightness control - continued
3) The brightness control to set large current over IC max setting current is made by giving DC control voltage to VFB pin of
IC via a series resistor as shown in under figure. LED luminance (current) changed by giving DC voltage to VFB directly.
DC voltage is given from filtered one of DAC signal, or PWM signal shown in under figure.
LED current (ILED) is next expression.
ILED = [[(FB-DC) / R1] * R2 + FB ] / RFB
L1
10μH
BD60A60NUX 3LEDx7parallel
VIN
2.7V to 4.6V
160
140
120
100
80
COUT
3s7p
CIN
2.2μF
4.7μF
VIN
PWM
EN
SW
VOUT
R2
6.8kꢀ
RESET
FB
RFB
6.49ꢀ
60
R1
22kꢀ
ISET
GND
40
20
DC
0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
DC [V]
L1
10μH
BD60A60NUX 3LEDx7parallel
VIN
200
180
160
140
120
100
80
2.7V to 4.6V
COUT
2.2μF
3s7p
CIN
4.7μF
VIN
SW
VOUT
PWM
EN
RESET
33kꢀ
47kꢀ
FB
GND
5ꢀ
ISET
60
40
100kꢀ
PWM
0 - 3.3V
20
47nF
0
0
20
40
60
80
100
PWM Duty [%] st 20kHz
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0G3G0C200320-1-2
27.SEP.2012 Rev.001
13/22
Daattaasshheeeett
BD60A00NUX
BD60A60NUX
●The coil selection
The DC/DC is designed by more than 4.7µH. When L value sets to a lower value, it is possibility that the specific
sub-harmonic oscillation of current mode DC / DC will be happened.
Please do not let L value to 3.3µH or below.
And, L value increases, the phase margin of DC / DC becomes to zero. Please enlarge the output capacitor value when you
increase L value.
●Output capacitor selection
Output Capacitor smoothly keeps output voltage and supplies LED current.
If LED current is set more than 20mA with Vcoil=2.3V to 5.5V, please make output capacitor more than 2.2µF. Otherwise
phase margin of DC/DC decreases and might oscillate.
Output Voltage consists of Charge (FET ON) and Discharge (LED current). So Output voltage has Output ripple Voltage
every FET switching.
Output ripple voltage is calculated as following.
Output ripple Voltage
- Switching cycle = T
- Total LED current = ILED
- Switching ON duty = D
- Output ripple Voltage = Vripple
- Output Capacitor (real value) = Creal
- Output Capacitor = COUT
- Decreasing ratio of Capacitor = Cerror
Creal = COUT × Cerror
(Capacitor value is decreased by Bias, so)
Creal = ILED × (1-D) × T / Vripple
COUT = ILED × (1-D) × T / Vripple / Cerror
(Example 1)
In case of, VIN=5.0V, fsw = 0.6MHz, VOUT =32.5V, ILED =20mA, COUT = 2.2µF, Cerror = 50%
T = 1 / 0.6MHz
D = 1 – VIN / VOUT = 1 – 5/32.5
Vripple
=
=
ILED × (1-D) × T / (COUT×Cerror) = 20mA × (5/32.5) ×(1 / 0.6MHz) / (2.2µF×0.5)
4.7mV
COUT
real
C
0V
35V
50V
Output voltage
●LED selection
Please select LED VF that input voltage is smaller than output voltage (VOUT).
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0G3G0C200320-1-2
27.SEP.2012 Rev.001
14/22
Daattaasshheeeett
BD60A00NUX
BD60A60NUX
●The separation of the IC power supply and coil power supply
This IC can work in separating the power source in both IC power supply and coil power supply. With this application, it can
obtain that decrease of IC power consumption, and the applied voltage exceeds IC rating 5.5V.
That application is shown in below Figure 8. The coil power supply is connected to high voltage source applied from
adapters. Then the IC power supply is connected to the power supply that should be different from the coil power supply.
2,3cell Battery
L1
Coil Power
2.3V to 20V
10μH
Ccoil
COUT
4.7μF
2.2μF
IC Power
Step down
DC/DC
CIN
2.7V to 4.6V
1μF
VIN SW
PWM
VOUT
25mA
PWM Input
RESET
EN
FB
GND
ISET
R1
24kꢀ
Figure 8. Application at the time of power supply separation
1 cell Battery
L1
10μH
IC Power
2.3V to 4.6V
COUT
CIN
4.7μF
2.2μF
VIN SW
PWM
VOUT
25mA
PWM Input
RESET
EN
FB
ISET
R1
24kꢀ
GND
Figure 9. Application at the time of power supply common
The number of available LEDs by each power supply voltage condition
ＰＷＭ dimming（LED current setting＝25mA)
２セル
１セル
2.7V 3V
3セル
VIN
４V
5V
6V
7V
8V
9V 10V 11V 12V 13V 14V 15V 16V 17V 18V 19V 20V
LEDs
2
3
4
5
6
7
8
9
10
C、S C、S C、S C、S
C、S C、S C、S C、S
C、S C、S C、S C、S
C、S C、S C、S C、S
C、S C、S C、S C、S
C、S C、S C、S C、S
C、S C、S C、S C、S
C、S C、S C、S C、S
C、S C、S C、S C、S
×
S
S
S
S
S
S
S
S
×
S
S
S
S
S
S
S
S
×
×
S
S
S
S
S
S
S
×
×
S
S
S
S
S
S
S
×
×
S
S
S
S
S
S
S
×
×
×
S
S
S
S
S
S
×
×
×
S
S
S
S
S
S
×
×
×
×
S
S
S
S
S
×
×
×
×
S
S
S
S
S
×
×
×
×
×
S
S
S
S
×
×
×
×
×
S
S
S
S
×
×
×
×
×
×
S
×
×
×
×
×
×
×
S
×
×
×
×
×
×
×
S
×
×
×
×
×
×
×
×
S
S
S
S
S
※ C・・・Vcoil-Vin common power supply
ꢀ S・・・Vcoil-Vin separated power supply
×・・・No use due to LED terminal over voltage protection
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0G3G0C200320-1-2
27.SEP.2012 Rev.001
15/22
Daattaasshheeeett
BD60A00NUX
BD60A60NUX
●About the order of a power supply injection at the time of power supply separation
Even if the IC power supply is 0V, leak channel is blocked as pull down resistor for power off is placed inside the
IC. The resistor intercepts leak channel from coil power supply. Additionally, there is no order for standing up and down of
coil and IC power supply.
・
・
At the time of starting
It doesn’t matter whether coil Power or IC Power becomes activated first.
At the time of power supply OFF
Please turn off after make EN terminal “L”. If power supply voltage of coil power becomes low, coil current increases
due to high boosting, which leads to over current limit. In order to avoid this state, before turning off a power supply
it is necessary to surely set EN to L.
Coil Power
Free
IC Power
EN
PWM
VOUT
●Input voltage 5V（BD60A00NUX）
The GND noise become big by impedance of PCB boards, so that wake up characteristics might become unstable.
To select input voltage to 5V(input voltage 4.61V over), we recommend under application to insert 4.7ꢀ
between input voltage line and Vin terminal
L1
10μH
VIN
2.7V to 5.5V
COUT
4.7ꢀ
CIN
2.2μF
4.7μF
VIN
SW
VOUT
PWM Input
25mA
PWM
EN
RESET
FB
GND
ISET
RISET
24kꢀ
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0G3G0C200320-1-2
27.SEP.2012 Rev.001
16/22
Daattaasshheeeett
BD60A00NUX
BD60A60NUX
●PCB Layout
In order to make the most of the performance of this IC, its PCB layout is very important. Characteristics such as efficiency
and ripple and the likes change greatly with PCB layout, which please note carefully
L1
10μH
SBD
VIN
2.7V to 4.6V
COUT
CIN
2.2μF
4.7μF
VIN
SW
VOUT
PWM Input
25mA
PWM
EN
RESET
FB
GND
ISET
RISET
24kꢀ
<Input capacitor CIN for coil>
Connect input capacitor CIN as close as possible between coil L1 and GND.
<Schottky barrier diode SBD>
Connect schottky barrier diode SBD as close as possible between coils L1and SW pin.
<Output capacitor COUT>
Connect output capacitor COUT between cathode of SBD and GND.
Make both GND sides of CIN and COUT as close as possible.
<LED current setting resistor RISET(24kꢀ)>>
Connect LED current setting resistor RISET(24kꢀ) as close as possible between ISET pin and GND.
There is possibility to oscillate when capacity is added to ISET terminal, So pay attention that capacity isn’t added.
<Heat radiation of back side PAD>
PAD is used for improving the efficiency of IC heat radiation. Solder PAD to GND pin.
Moreover, connect ground plane of board using via as shown in the patterns of next page.
The efficiency of heat radiation improves according to the area of ground plane.
<Others>
When those pins are not connected directly near the chip, influence is give to the performance of BD60A00NUX, and
may limit the current drive performance. As for the wire to the inductor, make its resistance component small so as to
reduce electric power consumption and increase the entire efficiency.
The PCB layout in consideration of these is shown in the next page.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0G3G0C200320-1-2
27.SEP.2012 Rev.001
17/22
Daattaasshheeeett
BD60A00NUX
BD60A60NUX
●Recommended PCB layout
SBD
coil
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0G3G0C200320-1-2
27.SEP.2012 Rev.001
18/22
Daattaasshheeeett
BD60A00NUX
BD60A60NUX
●Selection of external parts
Recommended external parts are as shown below.
When to use other parts than these, select the following equivalent parts.
L1: This coil is for boosting. Recommended capacity value is 10uH. Please use the coil with adequate direct current
capacity and also low direct current resistor.
Size
Horizontal
3.8
DC current
(mA)
800
DCR
(ꢀ)
Value
Manufacturer
Product number
Vertical
4.0
Height
1.2
10µH
10µH
10µH
10µH
TDK
TDK
VLF4012AT-100MR79
VLF302512MT-100M
1094AS-100M
0.30
0.25
0.18
0.24
3.0
2.5
1.2
690
TOKO
TOKO
3.5
3.7
1.2
760
1229AS-H-100M
3.5
3.7
1.2
750
CIN: This is bypath capacitor for power supply, which removes power supply noise occurred instantly and provides stable
power supply for IC. In order to obtain better quality, please use low ESR products such as ceramic capacitors.
Recommended capacity value is more than 1µF.
COUT: This is output smoothing capacitor. Recommended capacity value is 2.2µF.
When choosing capacitors such as CIN and COUT, please be careful of pressure. The base line of pressure is about 2
times of actual applying voltage. If pressure margin decreases, it might be happened that capacity value becomes almost a
half of nominal value.
Pressur Manufactur
Size
Value
Product number
e
e
Vertical
1.6.
Horizontal
Height
0.5.
[ CIN : Power supply voltage capacitor]
1.0µF
10V.
MURATA
GRM185B31A105
0.8.
[COUT : Output capacitor ]
1.0µF
2.2µF
50V
50V
MURATA
MURATA
GRM31MB31H105
GRM31CB31H225
3.2
3.2
1.6
1.6
1.15
1.6
RISET: LED current ILEDshould be decided when activated.
Value Tolerance Manufacturer Product number
[RISET : Resistor used for deciding LED current]
Size
I
LED (mA)
Vertical
Horizontal
Height
20kꢀ
24kꢀ
30kꢀ
56kꢀ
±0.5%
±0.5%
±0.5%
±0.5%
ROHM
ROHM
ROHM
ROHM
MCR03PZPZD2002
1.6
1.6
1.6
1.6
0.8
0.8
0.8
0.8
0.45
0.45
0.45
0.45
30
25
MCR03PZPZD2402
MCR03PZPZD3002
MCR03PZPZD5602
20
10.7
SBD: This schottky diode (SBD) is for output rectification. In order to obtain higher switching efficiency, please use low VF
low reverse leak, and high current capacity.
Size
Pressure
Manufacturer
Product Number
Vertical
3.5
Horizontal
1.6
Height
0.8
60V
40V
60V
ROHM
ROHM
ROHM
RB160M-60
RB521S-40
RB060M-60
1.6
0.8
0.6
3.5
1.6
0.8
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0G3G0C200320-1-2
27.SEP.2012 Rev.001
19/22
Daattaasshheeeett
BD60A00NUX
BD60A60NUX
●Operational Notes
(1) Absolute Maximum Ratings
An excess in the absolute maximum ratings, such as supply voltage (VIN), temperature range of operating conditions
(Topr), etc., can break down devices, thus making impossible to identify breaking mode such as a short circuit or an
open circuit. If any special mode exceeding the absolute maximum ratings is assumed, consideration should be given
to take physical safety measures including the use of fuses, etc.
(2) Operating conditions
These conditions represent a range within which characteristics can be provided approximately as expected. The
electrical characteristics are guaranteed under the conditions of each parameter.
(3) Reverse connection of power supply connector
The reverse connection of power supply connector can break down ICs. Take protective measures against the
breakdown due to the reverse connection, such as mounting an external diode between the power supply and the IC’s
power supply terminal.
(4) Power supply line
Design PCB pattern to provide low impedance for the wiring between the power supply and the GND lines.
Furthermore, for all power supply terminals to ICs, mount a capacitor between the power supply and the GND terminal.
At the same time, in order to use an electrolytic capacitor, thoroughly check to be sure the characteristics of the
capacitor to be used present no problem including the occurrence of capacity dropout at a low temperature, thus
determining the constant.
(5) GND voltage
Make setting of the potential of the GND terminal so that it will be maintained at the minimum in any operating state.
Furthermore, check to be sure no terminals are at a potential lower than the GND voltage including an actual electric
transient.
(6) Short circuit between terminals and erroneous mounting
In order to mount ICs on a set PCB, pay thorough attention to the direction and offset of the ICs. Erroneous mounting
can break down the ICs. Furthermore, if a short circuit occurs due to foreign matters entering between terminals or
between the terminal and the power supply or the GND terminal, the ICs can break down.
(7) Operation in strong electromagnetic field
Be noted that using ICs in the strong electromagnetic field can malfunction them.
(8) Inspection with set PCB
On the inspection with the set PCB, if a capacitor is connected to a low-impedance IC terminal, the IC can suffer stress.
Therefore, be sure to discharge from the set PCB by each process. Furthermore, in order to mount or dismount the set
PCB to/from the jig for the inspection process, be sure to turn OFF the power supply and then mount the set PCB to
the jig. After the completion of the inspection, be sure to turn OFF the power supply and then dismount it from the jig. In
addition, for protection against static electricity, establish a ground for the assembly process and pay thorough attention
to the transportation and the storage of the set PCB.
(9) Input terminals
In terms of the construction of IC, parasitic elements are inevitably formed in relation to potential. The operation of the
parasitic element can cause interference with circuit operation, thus resulting in a malfunction and then breakdown of
the input terminal. Therefore, pay thorough attention not to handle the input terminals, such as to apply to the input
terminals a voltage lower than the GND respectively, so that any parasitic element will operate. Furthermore, do not
apply a voltage to the input terminals when no power supply voltage is applied to the IC. In addition, even if the power
supply voltage is applied, apply to the input terminals a voltage lower than the power supply voltage or within the
guaranteed value of electrical characteristics.
(10) Ground wiring pattern
If small-signal GND and large-current GND are provided, It will be recommended to separate the large-current GND
pattern from the small-signal GND pattern and establish a single ground at the reference point of the set PCB so that
resistance to the wiring pattern and voltage fluctuations due to a large current will cause no fluctuations in voltages of
the small-signal GND. Pay attention not to cause fluctuations in the GND wiring pattern of external parts as well.
(11) External capacitor
In order to use a ceramic capacitor as the external capacitor, determine the constant with consideration given to a
degradation in the nominal capacitance due to DC bias and changes in the capacitance due to temperature, etc.
(12) Thermal shutdown circuit (TSD)
When junction temperatures become 175˚C (Typ.) or higher, the thermal shutdown circuit operates and turns a switch
OFF. The thermal shutdown circuit, which is aimed at isolating the LSI from thermal runaway as much as possible, is
not aimed at the protection or guarantee of the LSI. Therefore, do not continuously use the LSI with this circuit
operating or use the LSI assuming its operation.
(13) Thermal design
Perform thermal design in which there are adequate margins by taking into account the permissible dissipation (Pd) in
actual states of use.
(14) Selection of coil
Select the low DCR inductors to decrease power loss for DC/DC converter.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0G3G0C200320-1-2
27.SEP.2012 Rev.001
20/22
Daattaasshheeeett
BD60A00NUX
BD60A60NUX
●Ordering Information
B
D
6
0
A
x
0
N
U
X
-
T R
Part Number
Package
NUX: VSON008X2030
Packaging and forming
specification
TR: Embossed tape and reel
●Marking Diagram
VSON008X2030 (TOP VIEW)
Marking
Part Number
BD60A00NUX
Part Number Marking
LOT Number
D 6 0
A 0 0
D 6 0
A 6 0
BD60A60NUX
1PIN MARK
●Physical Dimension Tape and Reel Information
VSON008X2030
<Tape and Reel information>
2.0 0.1
Tape
Embossed carrier tape
4000pcs
Quantity
TR
1PIN MARK
S
Direction
of feed
The direction is the 1pin of product is at the upper right when you hold
reel on the left hand and you pull out the tape on the right hand
(
)
0.08
S
1.5 0.1
0.5
C0.25
1
4
8
5
0.25
Direction of feed
1pin
+0.05
−0.04
0.25
Reel
Order quantity needs to be multiple of the minimum quantity.
∗
(Unit : mm)
Status of this document
The Japanese version of this document is formal specification. A customer may use this translation version only for a reference
to help reading the formal version.
If there are any differences in translation version of this document formal version takes priority.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0G3G0C200320-1-2
21/22
27.SEP.2012 Rev.001
Daattaasshheeeett
BD60A00NUX
BD60A60NUX
●Revision History
Date
Revision
001
Changes
27.Sep.2012
New Release
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0G3G0C200320-1-2
27.SEP.2012 Rev.001
22/22
Daattaasshheeeett
Notice
●General Precaution
1) Before you use our Products, you are requested to carefully read this document and fully understand its contents.
ROHM shall not be in any way responsible or liable for failure, malfunction or accident arising from the use of any
ROHM’s Products against warning, caution or note contained in this document.
2) All information contained in this document is current as of the issuing date and subject to change without any prior
notice. Before purchasing or using ROHM’s Products, please confirm the latest information with a ROHM sales
representative.
●Precaution on using ROHM Products
1) Our Products are designed and manufactured for application in ordinary electronic equipments (such as AV equipment,
OA equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). If you
intend to use our Products in devices requiring extremely high reliability (such as medical equipment, transport
equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car
accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or
serious damage to property (“Specific Applications”), please consult with the ROHM sales representative in advance.
Unless otherwise agreed in writing by ROHM in advance, ROHM shall not be in any way responsible or liable for any
damages, expenses or losses incurred by you or third parties arising from the use of any ROHM’s Products for Specific
Applications.
2) ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor
products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate
safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which
a failure or malfunction of our Products may cause. The following are examples of safety measures:
[a] Installation of protection circuits or other protective devices to improve system safety
[b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure
3) Our Products are designed and manufactured for use under standard conditions and not under any special or
extraordinary environments or conditions, as exemplified below. Accordingly, ROHM shall not be in any way
responsible or liable for any damages, expenses or losses arising from the use of any ROHM’s Products under any
special or extraordinary environments or conditions. If you intend to use our Products under any special or
extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of
product performance, reliability, etc, prior to use, must be necessary:
[a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents
[b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust
[c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including Cl2,
H2S, NH3, SO2, and NO2
[d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves
[e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items
[f] Sealing or coating our Products with resin or other coating materials
[g] Use of our Products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue of
flux is recommended); or Washing our Products by using water or water-soluble cleaning agents for cleaning
residue after soldering
[h] Use of the Products in places subject to dew condensation
4) The Products are not subject to radiation-proof design.
5) Please verify and confirm characteristics of the final or mounted products in using the Products.
6) In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse) is applied,
confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power
exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affect
product performance and reliability.
7) De-rate Power Dissipation (Pd) depending on Ambient temperature (Ta). When used in sealed area, confirm the actual
ambient temperature.
8) Confirm that operation temperature is within the specified range described in the product specification.
9) ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in
this document.
Notice - Rev.003
© 2012 ROHM Co., Ltd. All rights reserved.
Daattaasshheeeett
●Precaution for Mounting / Circuit board design
1) When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product
performance and reliability.
2) In principle, the reflow soldering method must be used; if flow soldering method is preferred, please consult with the
ROHM representative in advance.
For details, please refer to ROHM Mounting specification
●Precautions Regarding Application Examples and External Circuits
1) If change is made to the constant of an external circuit, please allow a sufficient margin considering variations of the
characteristics of the Products and external components, including transient characteristics, as well as static
characteristics.
2) You agree that application notes, reference designs, and associated data and information contained in this document
are presented only as guidance for Products use. Therefore, in case you use such information, you are solely
responsible for it and you must exercise your own independent verification and judgment in the use of such information
contained in this document. ROHM shall not be in any way responsible or liable for any damages, expenses or losses
incurred by you or third parties arising from the use of such information.
●Precaution for Electrostatic
This Product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. Please take proper
caution in your manufacturing process and storage so that voltage exceeding the Products maximum rating will not be
applied to Products. Please take special care under dry condition (e.g. Grounding of human body / equipment / solder iron,
isolation from charged objects, setting of Ionizer, friction prevention and temperature / humidity control).
●Precaution for Storage / Transportation
1) Product performance and soldered connections may deteriorate if the Products are stored in the places where:
[a] the Products are exposed to sea winds or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2
[b] the temperature or humidity exceeds those recommended by ROHM
[c] the Products are exposed to direct sunshine or condensation
[d] the Products are exposed to high Electrostatic
2) Even under ROHM recommended storage condition, solderability of products out of recommended storage time period
may be degraded. It is strongly recommended to confirm solderability before using Products of which storage time is
exceeding the recommended storage time period.
3) Store / transport cartons in the correct direction, which is indicated on a carton with a symbol. Otherwise bent leads
may occur due to excessive stress applied when dropping of a carton.
4) Use Products within the specified time after opening a humidity barrier bag. Baking is required before using Products of
which storage time is exceeding the recommended storage time period.
●Precaution for Product Label
QR code printed on ROHM Products label is for ROHM’s internal use only.
●Precaution for Disposition
When disposing Products please dispose them properly using an authorized industry waste company.
●Precaution for Foreign Exchange and Foreign Trade act
Since our Products might fall under controlled goods prescribed by the applicable foreign exchange and foreign trade act,
please consult with ROHM representative in case of export.
●Precaution Regarding Intellectual Property Rights
1) All information and data including but not limited to application example contained in this document is for reference
only. ROHM does not warrant that foregoing information or data will not infringe any intellectual property rights or any
other rights of any third party regarding such information or data. ROHM shall not be in any way responsible or liable
for infringement of any intellectual property rights or other damages arising from use of such information or data.:
2) No license, expressly or implied, is granted hereby under any intellectual property rights or other rights of ROHM or any
third parties with respect to the information contained in this document.
Notice - Rev.003
© 2012 ROHM Co., Ltd. All rights reserved.
Daattaasshheeeett
●Other Precaution
1) The information contained in this document is provided on an “as is” basis and ROHM does not warrant that all
information contained in this document is accurate and/or error-free. ROHM shall not be in any way responsible or
liable for any damages, expenses or losses incurred by you or third parties resulting from inaccuracy or errors of or
concerning such information.
2) This document may not be reprinted or reproduced, in whole or in part, without prior written consent of ROHM.
3) The Products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written
consent of ROHM.
4) In no event shall you use in any way whatsoever the Products and the related technical information contained in the
Products or this document for any military purposes, including but not limited to, the development of mass-destruction
weapons.
5) The proper names of companies or products described in this document are trademarks or registered trademarks of
ROHM, its affiliated companies or third parties.
Notice - Rev.003
© 2012 ROHM Co., Ltd. All rights reserved.
相关型号：
BD60A60NUX
White Backlight LED Drivers for Small to Medium LCD Panels (Switching Regulator Type)
ROHM
BD60FC0WEFJ
BD60FC0WEFJ是可提供最大1A电流的低饱和型稳压器。BDxxFC0WEFJ系列有可通过外部电阻设定输出电压的可变型和固定型产品。封装组件采用HTSOP-J8。本系列内置防止因输出短路等发生IC破坏的过电流保护、以及防止因过负荷状态等使IC发生热破坏的过热保护电路。
ROHM
BD60FC0WFP
BD60FC0WFP是可提供最大1A电流的低饱和型稳压器。输出电压固定型。封装是TO252-5。BD60FC0WFP内置防止因输出短路等发生IC破坏的过电流保护、以及防止因过负荷状态等使IC发生热破坏的过热保护电路。
ROHM
©2020 ICPDF网 联系我们和版权申明